scip.h

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*                                                                           */
/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
/*                                                                           */
/*    Copyright (C) 2002-2015 Konrad-Zuse-Zentrum                            */
/*                            fuer Informationstechnik Berlin                */
/*                                                                           */
/*  SCIP is distributed under the terms of the ZIB Academic License.         */
/*                                                                           */
/*  You should have received a copy of the ZIB Academic License              */
/*  along with SCIP; see the file COPYING. If not email to scip@zib.de.      */
/*                                                                           */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**@file   scip.h
 * @ingroup PUBLICMETHODS
 * @brief  SCIP callable library
 * @author Tobias Achterberg
 * @author Timo Berthold
 * @author Thorsten Koch
 * @author Alexander Martin
 * @author Marc Pfetsch
 * @author Kati Wolter
 */

/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/

#ifndef __SCIP_SCIP_H__
#define __SCIP_SCIP_H__


#include <stdio.h>

#include "scip/def.h"
#include "blockmemshell/memory.h"
#include "scip/type_retcode.h"
#include "scip/type_result.h"
#include "scip/type_clock.h"
#include "scip/type_misc.h"
#include "scip/type_timing.h"
#include "scip/type_paramset.h"
#include "scip/type_event.h"
#include "scip/type_lp.h"
#include "scip/type_nlp.h"
#include "scip/type_var.h"
#include "scip/type_prob.h"
#include "scip/type_tree.h"
#include "scip/type_scip.h"

#include "scip/type_branch.h"
#include "scip/type_conflict.h"
#include "scip/type_cons.h"
#include "scip/type_dialog.h"
#include "scip/type_disp.h"
#include "scip/type_heur.h"
#include "scip/type_compr.h"
#include "scip/type_history.h"
#include "scip/type_nodesel.h"
#include "scip/type_presol.h"
#include "scip/type_pricer.h"
#include "scip/type_reader.h"
#include "scip/type_relax.h"
#include "scip/type_sepa.h"
#include "scip/type_prop.h"
#include "nlpi/type_nlpi.h"

/* include public interfaces, s.t. the user only needs to include scip.h */
#include "scip/pub_branch.h"
#include "scip/pub_conflict.h"
#include "scip/pub_cons.h"
#include "scip/pub_cutpool.h"
#include "scip/pub_dialog.h"
#include "scip/pub_disp.h"
#include "scip/pub_event.h"
#include "scip/pub_fileio.h"
#include "scip/pub_heur.h"
#include "scip/pub_compr.h"
#include "scip/pub_history.h"
#include "scip/pub_implics.h"
#include "scip/pub_lp.h"
#include "scip/pub_nlp.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_nodesel.h"
#include "scip/pub_paramset.h"
#include "scip/pub_presol.h"
#include "scip/pub_pricer.h"
#include "scip/pub_reader.h"
#include "scip/pub_relax.h"
#include "scip/pub_sepa.h"
#include "scip/pub_prop.h"
#include "scip/pub_sol.h"
#include "scip/pub_tree.h"
#include "scip/pub_var.h"
#include "lpi/lpi.h"
#include "nlpi/pub_expr.h"

/* include global presolving methods */
#include "scip/presolve.h"

/* In debug mode, we include the SCIP's structure in scip.c, such that no one can access
 * this structure except the interface methods in scip.c.
 * In optimized mode, the structure is included in scip.h, because some of the methods
 * are implemented as defines for performance reasons (e.g. the numerical comparisons).
 * Additionally, the internal "set.h" is included, such that the defines in set.h are
 * available in optimized mode.
 */
#ifdef NDEBUG
#include "scip/struct_scip.h"
#include "scip/set.h"
#include "scip/tree.h"
#include "scip/misc.h"
#include "scip/var.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * miscellaneous methods
 */

/**@name Miscellaneous Methods */
/**@{ */

/** returns complete SCIP version number in the format "major . minor tech"
 *
 *  @return complete SCIP version
 */
extern
SCIP_Real SCIPversion(
   void
   );

/** returns SCIP major version
 *
 *  @return major SCIP version
 */
extern
int SCIPmajorVersion(
   void
   );

/** returns SCIP minor version
 *
 *  @return minor SCIP version
 */
extern
int SCIPminorVersion(
   void
   );

/** returns SCIP technical version
 *
 *  @return technical SCIP version
 */
extern
int SCIPtechVersion(
   void
   );

/** returns SCIP sub version number
 *
 *  @return subversion SCIP version
 */
extern
int SCIPsubversion(
   void
   );

/** prints a version information line to a file stream via the message handler system
 *
 *  @note If the message handler is set to a NULL pointer nothing will be printed
 */
extern
void SCIPprintVersion(
   SCIP*                 scip,               /**< SCIP data structure */
   FILE*                 file                /**< output file (or NULL for standard output) */
   );

/** prints error message for the given SCIP_RETCODE via the error prints method */
extern
void SCIPprintError(
   SCIP_RETCODE          retcode             /**< SCIP return code causing the error */
   );

/** update statistical information when a new solution was found */
extern
void SCIPstoreSolutionGap(
   SCIP*                 scip                /**< SCIP data structure */
   );

/**@} */




/*
 * general SCIP methods
 */

/**@name General SCIP Methods */
/**@{ */

/** creates and initializes SCIP data structures
 *
 *  @note The SCIP default message handler is installed. Use the method SCIPsetMessagehdlr() to install your own
 *        message handler or SCIPsetMessagehdlrLogfile() and SCIPsetMessagehdlrQuiet() to write into a log
 *        file and turn off/on the display output, respectively.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @post After calling this method @p scip reached the solving stage \ref SCIP_STAGE_INIT
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcreate(
   SCIP**                scip                /**< pointer to SCIP data structure */
   );

/** frees SCIP data structures
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After calling this method \SCIP reached the solving stage \ref SCIP_STAGE_FREE
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPfree(
   SCIP**                scip                /**< pointer to SCIP data structure */
   );

/** returns current stage of SCIP
 *
 *  @return the current SCIP stage
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_STAGE SCIPgetStage(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** outputs SCIP stage and solution status if applicable via the message handler
 *
 *  @note If the message handler is set to a NULL pointer nothing will be printed
 *
 *  @note If limits have been changed between the solution and the call to this function, the status is recomputed and
 *        thus may to correspond to the original status.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPprintStage(
   SCIP*                 scip,               /**< SCIP data structure */
   FILE*                 file                /**< output file (or NULL for standard output) */
   );

/** gets solution status
 *
 *  @return SCIP solution status
 *
 *  See \ref SCIP_Status "SCIP_STATUS" for a complete list of all possible solving status.
 */
extern
SCIP_STATUS SCIPgetStatus(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** outputs solution status
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  See \ref SCIP_Status "SCIP_STATUS" for a complete list of all possible solving status.
 */
extern
SCIP_RETCODE SCIPprintStatus(
   SCIP*                 scip,               /**< SCIP data structure */
   FILE*                 file                /**< output file (or NULL for standard output) */
   );

/** returns whether the current stage belongs to the transformed problem space
 *
 *  @return Returns TRUE if the \SCIP instance is transformed, otherwise FALSE
 */
extern
SCIP_Bool SCIPisTransformed(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns whether the solution process should be probably correct
 *
 *  @note This feature is not supported yet!
 *
 *  @return Returns TRUE if \SCIP is exact solving mode, otherwise FALSE
 */
extern
SCIP_Bool SCIPisExactSolve(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns whether the presolving process would be finished given no more presolving reductions are found in this
 *  presolving round
 *
 *  Checks whether the number of presolving rounds is not exceeded and the presolving reductions found in the current
 *  presolving round suffice to trigger another presolving round.
 *
 *  @note if subsequent presolvers find more reductions, presolving might continue even if the method returns FALSE
 *  @note does not check whether infeasibility or unboundedness was already detected in presolving (which would result
 *        in presolving being stopped although the method returns TRUE)
 *
 *  @return Returns TRUE if presolving is finished if no further reductions are detected
 */
extern
SCIP_Bool SCIPisPresolveFinished(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns whether SCIP has performed presolving during the last solve
 *
 *  @return Returns TRUE if presolving was performed during the last solve
 */
extern
SCIP_Bool SCIPhasPerformedPresolve(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns whether the user pressed CTRL-C to interrupt the solving process
 *
 *  @return Returns TRUE if Ctrl-C was pressed, otherwise FALSE.
 */
extern
SCIP_Bool SCIPpressedCtrlC(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns whether the solving process should be / was stopped before proving optimality;
 *  if the solving process should be / was stopped, the status returned by SCIPgetStatus() yields
 *  the reason for the premature abort
 *
 *  @return Returns TRUE if solving process is stopped/interrupted, otherwise FALSE.
 */
extern
SCIP_Bool SCIPisStopped(
   SCIP*                 scip                /**< SCIP data structure */
   );


/**@} */



/*
 * message output methods
 */

/**@name Message Output Methods */
/**@{ */

/** installs the given message handler, such that all messages are passed to this handler. A messages handler can be
 *  created via SCIPmessagehdlrCreate().
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre this method can be called in one of the following stages of the SCIP solving process:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note The currently installed messages handler gets freed if this SCIP instance is its last user (w.r.t. capture/release).
 */
extern
SCIP_RETCODE SCIPsetMessagehdlr(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_MESSAGEHDLR*     messagehdlr         /**< message handler to install, or NULL to suppress all output */
   );

/** returns the currently installed message handler
 *
 *  @return the currently installed message handler, or NULL if messages are currently suppressed
 */
extern
SCIP_MESSAGEHDLR* SCIPgetMessagehdlr(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the log file name for the currently installed message handler */
extern
void SCIPsetMessagehdlrLogfile(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           filename            /**< name of log file, or NULL (no log) */
   );

/** sets the currently installed message handler to be quiet (or not) */
extern
void SCIPsetMessagehdlrQuiet(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_Bool             quiet               /**< should screen messages be suppressed? */
   );

/** prints a warning message via the message handler */
extern
void SCIPwarningMessage(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           formatstr,          /**< format string like in printf() function */
   ...                                       /**< format arguments line in printf() function */
   );

/** prints a dialog message that requests user interaction or is a direct response to a user interactive command */
extern
void SCIPdialogMessage(
   SCIP*                 scip,               /**< SCIP data structure */
   FILE*                 file,               /**< file stream to print into, or NULL for stdout */
   const char*           formatstr,          /**< format string like in printf() function */
   ...                                       /**< format arguments line in printf() function */
   );

/** prints a message */
extern
void SCIPinfoMessage(
   SCIP*                 scip,               /**< SCIP data structure */
   FILE*                 file,               /**< file stream to print into, or NULL for stdout */
   const char*           formatstr,          /**< format string like in printf() function */
   ...                                       /**< format arguments line in printf() function */
   );

/** prints a message depending on the verbosity level */
extern
void SCIPverbMessage(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_VERBLEVEL        msgverblevel,       /**< verbosity level of this message */
   FILE*                 file,               /**< file stream to print into, or NULL for stdout */
   const char*           formatstr,          /**< format string like in printf() function */
   ...                                       /**< format arguments line in printf() function */
   );

/** returns the current message verbosity level
 *
 *  @return message verbosity level of SCIP
 *
 *  @see \ref SCIP_VerbLevel "SCIP_VERBLEVEL" for a list of all verbosity levels
 */
extern
SCIP_VERBLEVEL SCIPgetVerbLevel(
   SCIP*                 scip                /**< SCIP data structure */
   );


/**@} */




/*
 * SCIP copy methods
 */

/**@name Copy Methods */
/**@{ */

/** copies plugins from sourcescip to targetscip; in case that a constraint handler which does not need constraints
 *  cannot be copied, valid will return FALSE. All plugins can declare that, if their copy process failed, the
 *  copied SCIP instance might not represent the same problem semantics as the original.
 *  Note that in this case dual reductions might be invalid.
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *        Also, 'passmessagehdlr' should be set to FALSE.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After calling this method targetscip reaches one of the following stages depending on if and when the solution
 *        process was interrupted:
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note sourcescip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyPlugins(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_Bool             copyreaders,        /**< should the file readers be copied */
   SCIP_Bool             copypricers,        /**< should the variable pricers be copied */
   SCIP_Bool             copyconshdlrs,      /**< should the constraint handlers be copied */
   SCIP_Bool             copyconflicthdlrs,  /**< should the conflict handlers be copied */
   SCIP_Bool             copypresolvers,     /**< should the presolvers be copied */
   SCIP_Bool             copyrelaxators,     /**< should the relaxation handler be copied */
   SCIP_Bool             copyseparators,     /**< should the separators be copied */
   SCIP_Bool             copypropagators,    /**< should the propagators be copied */
   SCIP_Bool             copyheuristics,     /**< should the heuristics be copied */
   SCIP_Bool             copyeventhdlrs,     /**< should the event handlers be copied */
   SCIP_Bool             copynodeselectors,  /**< should the node selectors be copied */
   SCIP_Bool             copybranchrules,    /**< should the branchrules be copied */
   SCIP_Bool             copydisplays,       /**< should the display columns be copied */
   SCIP_Bool             copydialogs,        /**< should the dialogs be copied */
   SCIP_Bool             copynlpis,          /**< should the NLPIs be copied */
   SCIP_Bool             passmessagehdlr,    /**< should the message handler be passed */
   SCIP_Bool*            valid               /**< pointer to store whether plugins, in particular all constraint
                                              *   handlers which do not need constraints were validly copied */
   );

/** create a problem by copying the problem data of the source SCIP
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After calling this method targetscip reaches one of the following stages depending on if and when the solution
 *        process was interrupted:
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note sourcescip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyProb(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             global,             /**< create a global or a local copy? */
   const char*           name                /**< problem name */
   );

/** create a problem by copying the original problem data of the source SCIP
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After calling this method targetscip reaches one of the following stages depending on if and when the solution
 *        process was interrupted:
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note sourcescip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyOrigProb(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL  */
   const char*           name                /**< problem name of target */
   );

/** returns copy of the source variable; if there already is a copy of the source variable in the variable hash map,
 *  it is just returned as target variable; elsewise a new variable will be created and added to the target SCIP; this
 *  created variable is added to the variable hash map and returned as target variable
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *  @note if a new variable was created, this variable will be added to the target-SCIP, but it is not captured
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *
 *  @note targetscip stage does not get changed
 *
 *  @note sourcescip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPgetVarCopy(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_VAR*             sourcevar,          /**< source variable */
   SCIP_VAR**            targetvar,          /**< pointer to store the target variable */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables to the corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             global,             /**< should global or local bounds be used? */
   SCIP_Bool*            success             /**< pointer to store whether the copying was successful or not */
   );

/** copies all active variables from source-SCIP and adds these variable to the target-SCIP; the mapping between these
 *  variables are stored in the variable hashmap, target-SCIP has to be in problem creation stage, fixed and aggregated
 *  variables do not get copied
 *
 *  @note the variables are added to the target-SCIP but not captured
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyVars(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables to the corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             global              /**< should global or local bounds be used? */
   );

/** copies all original variables from source-SCIP and adds these variable to the target-SCIP; the mapping between these
 *  variables are stored in the variable hashmap, target-SCIP has to be in problem creation stage, fixed and aggregated
 *  variables do not get copied
 *
 *  @note the variables are added to the target-SCIP but not captured
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyOrigVars(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables to the corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap             /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   );

/** merges the histories of variables from a source SCIP into a target SCIP. The two data structures should point to
 *  different SCIP instances.
 *
 *  @note the notion of source and target is inverted here; \p sourcescip usually denotes a copied SCIP instance, whereas
 *        \p targetscip denotes the original instance
 */

extern
SCIP_RETCODE SCIPmergeVariableStatistics(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_VAR**            sourcevars,         /**< source variables for history merge */
   SCIP_VAR**            targetvars,         /**< target variables for history merge */
   int                   nvars               /**< number of variables in both variable arrays */
   );

/** returns copy of the source constraint; if there already is a copy of the source constraint in the constraint hash
 *  map, it is just returned as target constraint; elsewise a new constraint will be created; this created constraint is
 *  added to the constraint hash map and returned as target constraint; the variable map is used to map the variables of
 *  the source SCIP to the variables of the target SCIP
 *
 *  @warning If a constraint is marked to be checked for feasibility but not to be enforced, a LP or pseudo solution may
 *           be declared feasible even if it violates this particular constraint.  This constellation should only be
 *           used, if no LP or pseudo solution can violate the constraint -- e.g. if a local constraint is redundant due
 *           to the variable's local bounds.
 *
 *  @note The constraint is not added to the target SCIP. You can check whether a constraint is added by calling
 *        SCIPconsIsAdded(). (If you mix SCIPgetConsCopy() with SCIPcopyConss() you should pay attention to what you add
 *        explicitly and what is already added.)
 *
 *  @note The constraint is always captured, either during the creation of the copy or after finding the copy of the
 *        constraint in the constraint hash map
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPgetConsCopy(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_CONS*            sourcecons,         /**< source constraint of the source SCIP */
   SCIP_CONS**           targetcons,         /**< pointer to store the created target constraint */
   SCIP_CONSHDLR*        sourceconshdlr,     /**< source constraint handler for this constraint */
   SCIP_HASHMAP*         varmap,             /**< a SCIP_HASHMAP mapping variables of the source SCIP to the corresponding
                                              *   variables of the target SCIP, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   const char*           name,               /**< name of constraint, or NULL if the name of the source constraint should be used */
   SCIP_Bool             initial,            /**< should the LP relaxation of constraint be in the initial LP? */
   SCIP_Bool             separate,           /**< should the constraint be separated during LP processing? */
   SCIP_Bool             enforce,            /**< should the constraint be enforced during node processing? */
   SCIP_Bool             check,              /**< should the constraint be checked for feasibility? */
   SCIP_Bool             propagate,          /**< should the constraint be propagated during node processing? */
   SCIP_Bool             local,              /**< is constraint only valid locally? */
   SCIP_Bool             modifiable,         /**< is constraint modifiable (subject to column generation)? */
   SCIP_Bool             dynamic,            /**< is constraint subject to aging? */
   SCIP_Bool             removable,          /**< should the relaxation be removed from the LP due to aging or cleanup? */
   SCIP_Bool             stickingatnode,     /**< should the constraint always be kept at the node where it was added, even
                                              *   if it may be moved to a more global node? */
   SCIP_Bool             global,             /**< create a global or a local copy? */
   SCIP_Bool*            success             /**< pointer to store whether the copying was successful or not */
   );

/** copies constraints from the source-SCIP and adds these to the target-SCIP; for mapping the
 *  variables between the source and the target SCIP a hash map can be given; if the variable hash
 *  map is NULL or necessary variable mapping is missing, the required variables are created in the
 *  target-SCIP and added to the hash map, if not NULL; all variables which are created are added to
 *  the target-SCIP but not (user) captured; if the constraint hash map is not NULL the mapping
 *  between the constraints of the source and target-SCIP is stored
 *
 *  @note the constraints are added to the target-SCIP but are not (user) captured in the target SCIP. (If you mix
 *        SCIPgetConsCopy() with SCIPcopyConss() you should pay attention to what you add explicitly and what is already
 *        added.) You can check whether a constraint is added by calling SCIPconsIsAdded().
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyConss(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a SCIP_HASHMAP mapping variables of the source SCIP to the corresponding
                                              *   variables of the target SCIP, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             global,             /**< create a global or a local copy? */
   SCIP_Bool             enablepricing,      /**< should pricing be enabled in copied SCIP instance?
                                              *   If TRUE, the modifiable flag of constraints will be copied. */
   SCIP_Bool*            valid               /**< pointer to store whether all constraints were validly copied */
   );

/** copies all original constraints from the source-SCIP and adds these to the target-SCIP; for mapping the
 *  variables between the source and the target SCIP a hash map can be given; if the variable hash
 *  map is NULL or necessary variable mapping is missing, the required variables are created in the
 *  target-SCIP and added to the hash map, if not NULL; all variables which are created are added to
 *  the target-SCIP but not (user) captured; if the constraint hash map is not NULL the mapping
 *  between the constraints of the source and target-SCIP is stored
 *
 *  @note the constraints are added to the target-SCIP but are not (user) captured in the target SCIP. (If you mix
 *        SCIPgetConsCopy() with SCIPcopyConss() you should pay attention to what you add explicitly and what is already
 *        added.) You can check whether a constraint is added by calling SCIPconsIsAdded().
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyOrigConss(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a SCIP_HASHMAP mapping variables of the source SCIP to the corresponding
                                              *   variables of the target SCIP, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             enablepricing,      /**< should pricing be enabled in copied SCIP instance?
                                              *   If TRUE, the modifiable flag of constraints will be copied. */
   SCIP_Bool*            valid               /**< pointer to store whether all constraints were validly copied */
   );

/** convert all active cuts from cutpool to linear constraints
 *
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @note SCIP stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPconvertCutsToConss(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             global,             /**< create a global or a local copy? */
   int*                  ncutsadded          /**< pointer to store number of added cuts, or NULL */
   );

/** copies all active cuts from cutpool of sourcescip to linear constraints in targetscip
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyCuts(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             global,             /**< create a global or a local copy? */
   int*                  ncutsadded          /**< pointer to store number of copied cuts, or NULL */
   );

/** copies implications and cliques of sourcescip to targetscip
 *
 *  This function should be called for a targetscip in transformed stage. It can save time in presolving of the
 *  targetscip, since implications and cliques are copied.
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyImplicationsCliques(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   SCIP_Bool             global,             /**< create a global or a local copy? */
   SCIP_Bool*            infeasible,         /**< pointer to store whether an infeasibility was detected */
   int*                  nbdchgs,            /**< pointer to store the number of performed bound changes, or NULL */
   int*                  ncopied             /**< pointer to store number of copied implications and cliques, or NULL */
   );

/** copies parameter settings from sourcescip to targetscip
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_FREE
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyParamSettings(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip          /**< target SCIP data structure */
   );

/** gets depth of current scip instance (increased by each copy call)
 *
 *  @return Depth of subscip of SCIP is returned.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 *
 *  @note SCIP stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
int SCIPgetSubscipDepth(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** copies source SCIP to target SCIP; the copying process is done in the following order:
 *  1) copy the plugins
 *  2) copy the settings
 *  3) create problem data in target-SCIP and copy the problem data of the source-SCIP
 *  4) copy all active variables
 *  5) copy all constraints
 *
 *  @note all variables and constraints which are created in the target-SCIP are not (user) captured
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *        Also, 'passmessagehdlr' should be set to FALSE.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_FREE
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopy(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   const char*           suffix,             /**< optional suffix for problem name inside the target SCIP */
   SCIP_Bool             global,             /**< create a global or a local copy? */
   SCIP_Bool             enablepricing,      /**< should pricing be enabled in copied SCIP instance? If TRUE, pricer
                                              *   plugins will be copied and activated, and the modifiable flag of
                                              *   constraints will be respected. If FALSE, valid will be set to FALSE, when
                                              *   there are pricers present */
   SCIP_Bool             passmessagehdlr,    /**< should the message handler be passed */
   SCIP_Bool*            valid               /**< pointer to store whether the copying was valid or not */
   );

/** copies source SCIP original problem to target SCIP; the copying process is done in the following order:
 *  1) copy the plugins
 *  2) copy the settings
 *  3) create problem data in target-SCIP and copy the original problem data of the source-SCIP
 *  4) copy all original variables
 *  5) copy all original constraints
 *
 *  @note all variables and constraints which are created in the target-SCIP are not (user) captured
 *
 *  @note In a multi thread case, you need to lock the copying procedure from outside with a mutex.
 *        Also, 'passmessagehdlr' should be set to FALSE.
 *  @note Do not change the source SCIP environment during the copying process
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if sourcescip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *
 *  @pre This method can be called if targetscip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_FREE
 *
 *  @note sourcescip stage does not get changed
 *
 *  @note targetscip stage does not get changed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPcopyOrig(
   SCIP*                 sourcescip,         /**< source SCIP data structure */
   SCIP*                 targetscip,         /**< target SCIP data structure */
   SCIP_HASHMAP*         varmap,             /**< a hashmap to store the mapping of source variables corresponding
                                              *   target variables, or NULL */
   SCIP_HASHMAP*         consmap,            /**< a hashmap to store the mapping of source constraints to the corresponding
                                              *   target constraints, or NULL */
   const char*           suffix,             /**< suffix which will be added to the names of the target SCIP, might be empty */
   SCIP_Bool             enablepricing,      /**< should pricing be enabled in copied SCIP instance? If TRUE, pricer
                                              *   plugins will be copied and activated, and the modifiable flag of
                                              *   constraints will be respected. If FALSE, valid will be set to FALSE, when
                                              *   there are pricers present */
   SCIP_Bool             passmessagehdlr,    /**< should the message handler be passed */
   SCIP_Bool*            valid               /**< pointer to store whether the copying was valid or not */
   );

/**@} */

/*
 * parameter settings
 */

/**@name Parameter Methods */
/**@{ */

/** creates a SCIP_Bool parameter, sets it to its default value, and adds it to the parameter set
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddBoolParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   const char*           desc,               /**< description of the parameter */
   SCIP_Bool*            valueptr,           /**< pointer to store the current parameter value, or NULL */
   SCIP_Bool             isadvanced,         /**< is this parameter an advanced parameter? */
   SCIP_Bool             defaultvalue,       /**< default value of the parameter */
   SCIP_DECL_PARAMCHGD   ((*paramchgd)),     /**< change information method of parameter */
   SCIP_PARAMDATA*       paramdata           /**< locally defined parameter specific data */
   );

/** creates a int parameter, sets it to its default value, and adds it to the parameter set
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddIntParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   const char*           desc,               /**< description of the parameter */
   int*                  valueptr,           /**< pointer to store the current parameter value, or NULL */
   SCIP_Bool             isadvanced,         /**< is this parameter an advanced parameter? */
   int                   defaultvalue,       /**< default value of the parameter */
   int                   minvalue,           /**< minimum value for parameter */
   int                   maxvalue,           /**< maximum value for parameter */
   SCIP_DECL_PARAMCHGD   ((*paramchgd)),     /**< change information method of parameter */
   SCIP_PARAMDATA*       paramdata           /**< locally defined parameter specific data */
   );

/** creates a SCIP_Longint parameter, sets it to its default value, and adds it to the parameter set
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddLongintParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   const char*           desc,               /**< description of the parameter */
   SCIP_Longint*         valueptr,           /**< pointer to store the current parameter value, or NULL */
   SCIP_Bool             isadvanced,         /**< is this parameter an advanced parameter? */
   SCIP_Longint          defaultvalue,       /**< default value of the parameter */
   SCIP_Longint          minvalue,           /**< minimum value for parameter */
   SCIP_Longint          maxvalue,           /**< maximum value for parameter */
   SCIP_DECL_PARAMCHGD   ((*paramchgd)),     /**< change information method of parameter */
   SCIP_PARAMDATA*       paramdata           /**< locally defined parameter specific data */
   );

/** creates a SCIP_Real parameter, sets it to its default value, and adds it to the parameter set
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddRealParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   const char*           desc,               /**< description of the parameter */
   SCIP_Real*            valueptr,           /**< pointer to store the current parameter value, or NULL */
   SCIP_Bool             isadvanced,         /**< is this parameter an advanced parameter? */
   SCIP_Real             defaultvalue,       /**< default value of the parameter */
   SCIP_Real             minvalue,           /**< minimum value for parameter */
   SCIP_Real             maxvalue,           /**< maximum value for parameter */
   SCIP_DECL_PARAMCHGD   ((*paramchgd)),     /**< change information method of parameter */
   SCIP_PARAMDATA*       paramdata           /**< locally defined parameter specific data */
   );

/** creates a char parameter, sets it to its default value, and adds it to the parameter set
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddCharParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   const char*           desc,               /**< description of the parameter */
   char*                 valueptr,           /**< pointer to store the current parameter value, or NULL */
   SCIP_Bool             isadvanced,         /**< is this parameter an advanced parameter? */
   char                  defaultvalue,       /**< default value of the parameter */
   const char*           allowedvalues,      /**< array with possible parameter values, or NULL if not restricted */
   SCIP_DECL_PARAMCHGD   ((*paramchgd)),     /**< change information method of parameter */
   SCIP_PARAMDATA*       paramdata           /**< locally defined parameter specific data */
   );

/** creates a string(char*) parameter, sets it to its default value, and adds it to the parameter set
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddStringParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   const char*           desc,               /**< description of the parameter */
   char**                valueptr,           /**< pointer to store the current parameter value, or NULL; if not NULL then *valueptr should be NULL */
   SCIP_Bool             isadvanced,         /**< is this parameter an advanced parameter? */
   const char*           defaultvalue,       /**< default value of the parameter */
   SCIP_DECL_PARAMCHGD   ((*paramchgd)),     /**< change information method of parameter */
   SCIP_PARAMDATA*       paramdata           /**< locally defined parameter specific data */
   );

/** gets the fixing status of an existing parameter
 *
 *  @return TRUE if the parameter is fixed to a value, otherwise FALSE.
 */
extern
SCIP_Bool SCIPisParamFixed(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of the parameter */
   );

/** returns the pointer to the SCIP parameter with the given name
 *
 *  @return pointer to the parameter with the given name
 */
extern
SCIP_PARAM* SCIPgetParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of the parameter */
   );

/** gets the value of an existing SCIP_Bool parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPgetBoolParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   SCIP_Bool*            value               /**< pointer to store the parameter */
   );

/** gets the value of an existing int parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPgetIntParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   int*                  value               /**< pointer to store the parameter */
   );

/** gets the value of an existing SCIP_Longint parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPgetLongintParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   SCIP_Longint*         value               /**< pointer to store the parameter */
   );

/** gets the value of an existing SCIP_Real parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPgetRealParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   SCIP_Real*            value               /**< pointer to store the parameter */
   );

/** gets the value of an existing char parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPgetCharParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   char*                 value               /**< pointer to store the parameter */
   );

/** gets the value of an existing string(char*) parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPgetStringParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   char**                value               /**< pointer to store the parameter */
   );

/** fixes the value of an existing parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @note: Be careful with this method! Some general settings, e.g., the time or node limit, should not be fixed because
 *         they have to be changed for sub-SCIPs.
 */
extern
SCIP_RETCODE SCIPfixParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of the parameter */
   );

/** unfixes the value of an existing parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPunfixParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of the parameter */
   );

/** changes the value of an existing parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   void*                 value               /**< new value of the parameter */
   );

/** changes the value of an existing SCIP_Bool parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPchgBoolParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   SCIP_Bool             value               /**< new value of the parameter */
   );

/** changes the value of an existing SCIP_Bool parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetBoolParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   SCIP_Bool             value               /**< new value of the parameter */
   );

/** checks the value of an existing SCIP_Bool parameter; issues a warning message if value was invalid
 *
 *  @return \ref SCIP_OKAY is returned if value is valid. Otherwise \ref SCIP_PARAMETERWRONGVAL is returned.
 */
extern
SCIP_RETCODE SCIPcheckBoolParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   SCIP_Bool             value               /**< value to check */
   );

/** changes the value of an existing int parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPchgIntParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   int                   value               /**< new value of the parameter */
   );

/** changes the value of an existing int parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetIntParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   int                   value               /**< new value of the parameter */
   );

/** changes the value of an existing SCIP_Longint parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPchgLongintParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   SCIP_Longint          value               /**< new value of the parameter */
   );

/** changes the value of an existing SCIP_Longint parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetLongintParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   SCIP_Longint          value               /**< new value of the parameter */
   );

/** checks parameter value according to the given feasible domain; issues a warning message if value was invalid
 *
 *  @return \ref SCIP_OKAY is returned if value is valid. Otherwise \ref SCIP_PARAMETERWRONGVAL is returned.
 */
extern
SCIP_RETCODE SCIPcheckLongintParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   SCIP_Longint          value               /**< value to check */
   );

/** changes the value of an existing SCIP_Real parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPchgRealParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   SCIP_Real             value               /**< new value of the parameter */
   );

/** changes the value of an existing SCIP_Real parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetRealParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   SCIP_Real             value               /**< new value of the parameter */
   );

/** changes the value of an existing char parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPchgCharParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   char                  value               /**< new value of the parameter */
   );

/** changes the value of an existing char parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetCharParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   char                  value               /**< new value of the parameter */
   );

/** checks parameter value according to the given feasible domain; issues a warning message if value was invalid
 *
 *  @return \ref SCIP_OKAY is returned if value is valid. Otherwise \ref SCIP_PARAMETERWRONGVAL is returned.
 */
extern
SCIP_RETCODE SCIPcheckCharParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   const char            value               /**< value to check */
   );

/** changes the value of an existing string(char*) parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPchgStringParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   const char*           value               /**< new value of the parameter */
   );

/** changes the value of an existing string(char*) parameter
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetStringParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of the parameter */
   const char*           value               /**< new value of the parameter */
   );

/** checks parameter value according to the given feasible domain; issues a warning message if value was invalid
 *
 *  @return \ref SCIP_OKAY is returned if value is valid. Otherwise \ref SCIP_PARAMETERWRONGVAL is returned.
 */
extern
SCIP_RETCODE SCIPcheckStringParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   const char*           value               /**< value to check */
   );

/** reads parameters from a file
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPreadParams(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           filename            /**< file name */
   );

/** writes a single parameter to a file
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPwriteParam(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAM*           param,              /**< parameter */
   const char*           filename,           /**< file name, or NULL for stdout */
   SCIP_Bool             comments,           /**< should parameter descriptions be written as comments? */
   SCIP_Bool             onlychanged         /**< should only those parameters be written that are changed from their
                                              *   default value?
                                              */
   );

/** writes all parameters in the parameter set to a file
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPwriteParams(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           filename,           /**< file name, or NULL for stdout */
   SCIP_Bool             comments,           /**< should parameter descriptions be written as comments? */
   SCIP_Bool             onlychanged         /**< should only those parameters be written that are changed from their
                                              *   default value?
                                              */
   );

/** resets a single parameter to its default value
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPresetParam(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of the parameter */
   );

/** resets all parameters to their default values
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPresetParams(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets parameters to
 *
 *  - SCIP_PARAMEMPHASIS_DEFAULT to use default values (see also SCIPresetParams())
 *  - SCIP_PARAMEMPHASIS_COUNTER to get feasible and "fast" counting process
 *  - SCIP_PARAMEMPHASIS_CPSOLVER to get CP like search (e.g. no LP relaxation)
 *  - SCIP_PARAMEMPHASIS_EASYCIP to solve easy problems fast
 *  - SCIP_PARAMEMPHASIS_FEASIBILITY to detect feasibility fast
 *  - SCIP_PARAMEMPHASIS_HARDLP to be capable to handle hard LPs
 *  - SCIP_PARAMEMPHASIS_OPTIMALITY to prove optimality fast
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetEmphasis(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAMEMPHASIS    paramemphasis,      /**< parameter settings */
   SCIP_Bool             quiet               /**< should the parameter be set quiet (no output) */
   );

/** sets parameters to deactivate separators and heuristics that use auxiliary SCIP instances; should be called for
 *  auxiliary SCIP instances to avoid recursion
 *
 *  @note only deactivates plugins which could cause recursion, some plugins which use sub-SCIPs stay activated
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetSubscipsOff(
   SCIP*                 scip,               /**< (auxiliary) SCIP data structure */
   SCIP_Bool             quiet               /**< should the parameter be set quiet (no output) */
   );

/** sets heuristic parameters values to
 *
 *  - SCIP_PARAMSETTING_DEFAULT which are the default values of all heuristic parameters
 *  - SCIP_PARAMSETTING_FAST such that the time spend for heuristic is decreased
 *  - SCIP_PARAMSETTING_AGGRESSIVE such that the heuristic are called more aggregative
 *  - SCIP_PARAMSETTING_OFF which turn off all heuristics
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetHeuristics(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAMSETTING     paramsetting,       /**< parameter settings */
   SCIP_Bool             quiet               /**< should the parameter be set quiet (no output) */
   );

/** sets presolving parameters to
 *
 *  - SCIP_PARAMSETTING_DEFAULT which are the default values of all presolving parameters
 *  - SCIP_PARAMSETTING_FAST such that the time spend for presolving is decreased
 *  - SCIP_PARAMSETTING_AGGRESSIVE such that the presolving is more aggregative
 *  - SCIP_PARAMSETTING_OFF which turn off all presolving
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetPresolving(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAMSETTING     paramsetting,       /**< parameter settings */
   SCIP_Bool             quiet               /**< should the parameter be set quiet (no output) */
   );

/** sets separating parameters to
 *
 *  - SCIP_PARAMSETTING_DEFAULT which are the default values of all separating parameters
 *  - SCIP_PARAMSETTING_FAST such that the time spend for separating is decreased
 *  - SCIP_PARAMSETTING_AGGRESSIVE such that the separating is done more aggregative
 *  - SCIP_PARAMSETTING_OFF which turn off all separating
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetSeparating(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PARAMSETTING     paramsetting,       /**< parameter settings */
   SCIP_Bool             quiet               /**< should the parameter be set quiet (no output) */
   );

/** returns the array of all available SCIP parameters
 *
 *  @return SCIP_PARAM* array, containing all SCIP parameters.
 */
extern
SCIP_PARAM** SCIPgetParams(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the total number of all available SCIP parameters
 *
 *  @return number of all SCIP parameters.
 */
extern
int SCIPgetNParams(
   SCIP*                 scip                /**< SCIP data structure */
   );

/**@} */


/*
 * SCIP user functionality methods: managing plugins
 */

/**@name SCIP User Functionality Methods: Managing Plugins */
/**@{ */

/** creates a reader and includes it in SCIP
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note method has all reader callbacks as arguments and is thus changed every time a new callback is added
 *        in future releases; consider using SCIPincludeReaderBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeReader(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of reader */
   const char*           desc,               /**< description of reader */
   const char*           extension,          /**< file extension that reader processes */
   SCIP_DECL_READERCOPY  ((*readercopy)),    /**< copy method of reader or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_READERFREE  ((*readerfree)),    /**< destructor of reader */
   SCIP_DECL_READERREAD  ((*readerread)),    /**< read method */
   SCIP_DECL_READERWRITE ((*readerwrite)),   /**< write method */
   SCIP_READERDATA*      readerdata          /**< reader data */
   );

/** creates a reader and includes it in SCIP. All non-fundamental (or optional) callbacks will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see
 *  SCIPsetReaderCopy(), SCIPsetReaderFree(), SCIPsetReaderRead(), SCIPsetReaderWrite().
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeReader() instead
 */
extern
SCIP_RETCODE SCIPincludeReaderBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_READER**         readerptr,          /**< reference to reader pointer, or NULL */
   const char*           name,               /**< name of reader */
   const char*           desc,               /**< description of reader */
   const char*           extension,          /**< file extension that reader processes */
   SCIP_READERDATA*      readerdata          /**< reader data */
   );

/** set copy method of reader
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetReaderCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_READER*          reader,             /**< reader */
   SCIP_DECL_READERCOPY  ((*readercopy))     /**< copy method of reader or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** set deinitialization method of reader
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetReaderFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_READER*          reader,             /**< reader */
   SCIP_DECL_READERFREE  ((*readerfree))     /**< destructor of reader */
   );

/** set read method of reader
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetReaderRead(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_READER*          reader,             /**< reader */
   SCIP_DECL_READERREAD  ((*readerread))     /**< read method of reader */
   );

/** set write method of reader
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetReaderWrite(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_READER*          reader,             /**< reader */
   SCIP_DECL_READERWRITE ((*readerwrite))    /**< write method of reader */
   );

/** returns the reader of the given name, or NULL if not existing */
extern
SCIP_READER* SCIPfindReader(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of reader */
   );

/** returns the array of currently available readers */
extern
SCIP_READER** SCIPgetReaders(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available readers */
extern
int SCIPgetNReaders(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** creates a variable pricer and includes it in SCIP
 *  To use the variable pricer for solving a problem, it first has to be activated with a call to SCIPactivatePricer().
 *  This should be done during the problem creation stage.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note method has all pricer callbacks as arguments and is thus changed every time a new callback is added
 *        in future releases; consider using SCIPincludePricerBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludePricer(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of variable pricer */
   const char*           desc,               /**< description of variable pricer */
   int                   priority,           /**< priority of the variable pricer */
   SCIP_Bool             delay,              /**< should the pricer be delayed until no other pricers or already existing
                                              *   problem variables with negative reduced costs are found?
                                              *   if this is set to FALSE it may happen that the pricer produces columns
                                              *   that already exist in the problem (which are also priced in by the
                                              *   default problem variable pricing in the same round) */
   SCIP_DECL_PRICERCOPY  ((*pricercopy)),    /**< copy method of variable pricer or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_PRICERFREE  ((*pricerfree)),    /**< destructor of variable pricer */
   SCIP_DECL_PRICERINIT  ((*pricerinit)),    /**< initialize variable pricer */
   SCIP_DECL_PRICEREXIT  ((*pricerexit)),    /**< deinitialize variable pricer */
   SCIP_DECL_PRICERINITSOL((*pricerinitsol)),/**< solving process initialization method of variable pricer */
   SCIP_DECL_PRICEREXITSOL((*pricerexitsol)),/**< solving process deinitialization method of variable pricer */
   SCIP_DECL_PRICERREDCOST((*pricerredcost)),/**< reduced cost pricing method of variable pricer for feasible LPs */
   SCIP_DECL_PRICERFARKAS((*pricerfarkas)),  /**< Farkas pricing method of variable pricer for infeasible LPs */
   SCIP_PRICERDATA*      pricerdata          /**< variable pricer data */
   );

/** creates a variable pricer and includes it in SCIP with all non-fundamental callbacks set to NULL;
 *  if needed, these can be added afterwards via setter functions SCIPsetPricerCopy(), SCIPsetPricerFree(),
 *  SCIPsetPricerInity(), SCIPsetPricerExit(), SCIPsetPricerInitsol(), SCIPsetPricerExitsol(),
 *  SCIPsetPricerFarkas();
 *
 *  To use the variable pricer for solving a problem, it first has to be activated with a call to SCIPactivatePricer().
 *  This should be done during the problem creation stage.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludePricer() instead
 */
extern
SCIP_RETCODE SCIPincludePricerBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER**         pricerptr,          /**< reference to a pricer, or NULL */
   const char*           name,               /**< name of variable pricer */
   const char*           desc,               /**< description of variable pricer */
   int                   priority,           /**< priority of the variable pricer */
   SCIP_Bool             delay,              /**< should the pricer be delayed until no other pricers or already existing
                                              *   problem variables with negative reduced costs are found?
                                              *   if this is set to FALSE it may happen that the pricer produces columns
                                              *   that already exist in the problem (which are also priced in by the
                                              *   default problem variable pricing in the same round) */
   SCIP_DECL_PRICERREDCOST((*pricerredcost)),/**< reduced cost pricing method of variable pricer for feasible LPs */
   SCIP_DECL_PRICERFARKAS((*pricerfarkas)),  /**< Farkas pricing method of variable pricer for infeasible LPs */
   SCIP_PRICERDATA*      pricerdata          /**< variable pricer data */
   );

/** sets copy method of pricer
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetPricerCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer,             /**< pricer */
   SCIP_DECL_PRICERCOPY ((*pricercopy))     /**< copy method of pricer or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of pricer
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetPricerFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer,             /**< pricer */
   SCIP_DECL_PRICERFREE ((*pricerfree))      /**< destructor of pricer */
   );

/** sets initialization method of pricer
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetPricerInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer,             /**< pricer */
   SCIP_DECL_PRICERINIT  ((*pricerinit))     /**< initialize pricer */
   );

/** sets deinitialization method of pricer
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetPricerExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer,             /**< pricer */
   SCIP_DECL_PRICEREXIT  ((*pricerexit))     /**< deinitialize pricer */
   );

/** sets solving process initialization method of pricer
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetPricerInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer,             /**< pricer */
   SCIP_DECL_PRICERINITSOL ((*pricerinitsol))/**< solving process initialization method of pricer */
   );

/** sets solving process deinitialization method of pricer
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetPricerExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer,             /**< pricer */
   SCIP_DECL_PRICEREXITSOL((*pricerexitsol)) /**< solving process deinitialization method of pricer */
   );

/** returns the variable pricer of the given name, or NULL if not existing */
extern
SCIP_PRICER* SCIPfindPricer(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of variable pricer */
   );

/** returns the array of currently available variable pricers; active pricers are in the first slots of the array */
extern
SCIP_PRICER** SCIPgetPricers(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available variable pricers */
extern
int SCIPgetNPricers(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently active variable pricers, that are used in the LP solving loop */
extern
int SCIPgetNActivePricers(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a variable pricer */
extern
SCIP_RETCODE SCIPsetPricerPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer,             /**< variable pricer */
   int                   priority            /**< new priority of the variable pricer */
   );

/** activates pricer to be used for the current problem
 *  This method should be called during the problem creation stage for all pricers that are necessary to solve
 *  the problem model.
 *  The pricers are automatically deactivated when the problem is freed.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPactivatePricer(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer              /**< variable pricer */
   );

/** deactivates pricer
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
SCIP_RETCODE SCIPdeactivatePricer(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRICER*          pricer              /**< variable pricer */
   );

/** creates a constraint handler and includes it in SCIP.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note method has all constraint handler callbacks as arguments and is thus changed every time a new
 *        callback is added
 *        in future releases; consider using SCIPincludeConshdlrBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeConshdlr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of constraint handler */
   const char*           desc,               /**< description of constraint handler */
   int                   sepapriority,       /**< priority of the constraint handler for separation */
   int                   enfopriority,       /**< priority of the constraint handler for constraint enforcing */
   int                   chckpriority,       /**< priority of the constraint handler for checking feasibility (and propagation) */
   int                   sepafreq,           /**< frequency for separating cuts; zero means to separate only in the root node */
   int                   propfreq,           /**< frequency for propagating domains; zero means only preprocessing propagation */
   int                   eagerfreq,          /**< frequency for using all instead of only the useful constraints in separation,
                                              *   propagation and enforcement, -1 for no eager evaluations, 0 for first only */
   int                   maxprerounds,       /**< maximal number of presolving rounds the constraint handler participates in (-1: no limit) */
   SCIP_Bool             delaysepa,          /**< should separation method be delayed, if other separators found cuts? */
   SCIP_Bool             delayprop,          /**< should propagation method be delayed, if other propagators found reductions? */
   SCIP_Bool             needscons,          /**< should the constraint handler be skipped, if no constraints are available? */
   SCIP_PROPTIMING       proptiming,         /**< positions in the node solving loop where propagation method of constraint handlers should be executed */
   SCIP_PRESOLTIMING     presoltiming,       /**< timing mask of the constraint handler's presolving method */
   SCIP_DECL_CONSHDLRCOPY((*conshdlrcopy)),  /**< copy method of constraint handler or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_CONSFREE    ((*consfree)),      /**< destructor of constraint handler */
   SCIP_DECL_CONSINIT    ((*consinit)),      /**< initialize constraint handler */
   SCIP_DECL_CONSEXIT    ((*consexit)),      /**< deinitialize constraint handler */
   SCIP_DECL_CONSINITPRE ((*consinitpre)),   /**< presolving initialization method of constraint handler */
   SCIP_DECL_CONSEXITPRE ((*consexitpre)),   /**< presolving deinitialization method of constraint handler */
   SCIP_DECL_CONSINITSOL ((*consinitsol)),   /**< solving process initialization method of constraint handler */
   SCIP_DECL_CONSEXITSOL ((*consexitsol)),   /**< solving process deinitialization method of constraint handler */
   SCIP_DECL_CONSDELETE  ((*consdelete)),    /**< free specific constraint data */
   SCIP_DECL_CONSTRANS   ((*constrans)),     /**< transform constraint data into data belonging to the transformed problem */
   SCIP_DECL_CONSINITLP  ((*consinitlp)),    /**< initialize LP with relaxations of "initial" constraints */
   SCIP_DECL_CONSSEPALP  ((*conssepalp)),    /**< separate cutting planes for LP solution */
   SCIP_DECL_CONSSEPASOL ((*conssepasol)),   /**< separate cutting planes for arbitrary primal solution */
   SCIP_DECL_CONSENFOLP  ((*consenfolp)),    /**< enforcing constraints for LP solutions */
   SCIP_DECL_CONSENFOPS  ((*consenfops)),    /**< enforcing constraints for pseudo solutions */
   SCIP_DECL_CONSCHECK   ((*conscheck)),     /**< check feasibility of primal solution */
   SCIP_DECL_CONSPROP    ((*consprop)),      /**< propagate variable domains */
   SCIP_DECL_CONSPRESOL  ((*conspresol)),    /**< presolving method */
   SCIP_DECL_CONSRESPROP ((*consresprop)),   /**< propagation conflict resolving method */
   SCIP_DECL_CONSLOCK    ((*conslock)),      /**< variable rounding lock method */
   SCIP_DECL_CONSACTIVE  ((*consactive)),    /**< activation notification method */
   SCIP_DECL_CONSDEACTIVE((*consdeactive)),  /**< deactivation notification method */
   SCIP_DECL_CONSENABLE  ((*consenable)),    /**< enabling notification method */
   SCIP_DECL_CONSDISABLE ((*consdisable)),   /**< disabling notification method */
   SCIP_DECL_CONSDELVARS ((*consdelvars)),   /**< variable deletion method */
   SCIP_DECL_CONSPRINT   ((*consprint)),     /**< constraint display method */
   SCIP_DECL_CONSCOPY    ((*conscopy)),      /**< constraint copying method */
   SCIP_DECL_CONSPARSE   ((*consparse)),     /**< constraint parsing method */
   SCIP_DECL_CONSGETVARS ((*consgetvars)),   /**< constraint get variables method */
   SCIP_DECL_CONSGETNVARS((*consgetnvars)),  /**< constraint get number of variable method */
   SCIP_DECL_CONSGETDIVEBDCHGS((*consgetdivebdchgs)), /**< constraint handler diving solution enforcement method */
   SCIP_CONSHDLRDATA*    conshdlrdata        /**< constraint handler data */
   );

/** creates a constraint handler and includes it in SCIP. All non-fundamental (or optional) callbacks will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetConshdlrInit(), SCIPsetConshdlrExit(),
 *  SCIPsetConshdlrCopy(), SCIPsetConshdlrFree(), SCIPsetConshdlrInitsol(), SCIPsetConshdlrExitsol(),
 *  SCIPsetConshdlrInitpre(), SCIPsetConshdlrExitpre(), SCIPsetConshdlrPresol(), SCIPsetConshdlrDelete(),
 *  SCIPsetConshdlrDelvars(), SCIPsetConshdlrInitlp(), SCIPsetConshdlrActive(), SCIPsetConshdlrDeactive(),
 *  SCIPsetConshdlrEnable(), SCIPsetConshdlrDisable(), SCIPsetConshdlrResprop(), SCIPsetConshdlrTrans(),
 *  SCIPsetConshdlrPrint(), SCIPsetConshdlrParse(), SCIPsetConshdlrGetVars(), SCIPsetConshdlrGetNVars(), and
 *  SCIPsetConshdlrGetDiveBdChgs().
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeConshdlr() instead
 */
extern
SCIP_RETCODE SCIPincludeConshdlrBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR**       conshdlrptr,        /**< reference to a constraint handler pointer, or NULL */
   const char*           name,               /**< name of constraint handler */
   const char*           desc,               /**< description of constraint handler */
   int                   enfopriority,       /**< priority of the constraint handler for constraint enforcing */
   int                   chckpriority,       /**< priority of the constraint handler for checking feasibility (and propagation) */
   int                   eagerfreq,          /**< frequency for using all instead of only the useful constraints in separation,
                                              *   propagation and enforcement, -1 for no eager evaluations, 0 for first only */
   SCIP_Bool             needscons,          /**< should the constraint handler be skipped, if no constraints are available? */
   SCIP_DECL_CONSENFOLP  ((*consenfolp)),    /**< enforcing constraints for LP solutions */
   SCIP_DECL_CONSENFOPS  ((*consenfops)),    /**< enforcing constraints for pseudo solutions */
   SCIP_DECL_CONSCHECK   ((*conscheck)),     /**< check feasibility of primal solution */
   SCIP_DECL_CONSLOCK    ((*conslock)),      /**< variable rounding lock method */
   SCIP_CONSHDLRDATA*    conshdlrdata        /**< constraint handler data */
   );

/** sets all separation related callbacks/parameters of the constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrSepa(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSSEPALP  ((*conssepalp)),    /**< separate cutting planes for LP solution */
   SCIP_DECL_CONSSEPASOL ((*conssepasol)),   /**< separate cutting planes for arbitrary primal solution */
   int                   sepafreq,           /**< frequency for separating cuts; zero means to separate only in the root node */
   int                   sepapriority,       /**< priority of the constraint handler for separation */
   SCIP_Bool             delaysepa           /**< should separation method be delayed, if other separators found cuts? */
   );

/** sets both the propagation callback and the propagation frequency of the constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrProp(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSPROP    ((*consprop)),      /**< propagate variable domains */
   int                   propfreq,           /**< frequency for propagating domains; zero means only preprocessing propagation */
   SCIP_Bool             delayprop,          /**< should propagation method be delayed, if other propagators found reductions? */
   SCIP_PROPTIMING       proptiming          /**< positions in the node solving loop where propagation should be executed */
   );

/** sets copy method of both the constraint handler and each associated constraint
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSHDLRCOPY((*conshdlrcopy)),  /**< copy method of constraint handler or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_CONSCOPY    ((*conscopy))       /**< constraint copying method */
   );

/** sets destructor method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSFREE    ((*consfree))       /**< destructor of constraint handler */
   );

/** sets initialization method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSINIT    ((*consinit))       /**< initialize constraint handler */
   );

/** sets deinitialization method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSEXIT    ((*consexit))       /**< deinitialize constraint handler */
   );

/** sets solving process initialization method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSINITSOL((*consinitsol))     /**< solving process initialization method of constraint handler */
   );

/** sets solving process deinitialization method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSEXITSOL ((*consexitsol))/**< solving process deinitialization method of constraint handler */
   );

/** sets preprocessing initialization method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrInitpre(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSINITPRE((*consinitpre))     /**< preprocessing initialization method of constraint handler */
   );

/** sets preprocessing deinitialization method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrExitpre(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSEXITPRE((*consexitpre))     /**< preprocessing deinitialization method of constraint handler */
   );

/** sets presolving method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrPresol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSPRESOL  ((*conspresol)),    /**< presolving method of constraint handler */
   int                   maxprerounds,       /**< maximal number of presolving rounds the constraint handler participates in (-1: no limit) */
   SCIP_PRESOLTIMING     presoltiming        /**< timing mask of the constraint handler's presolving method */
   );

/** sets method of constraint handler to free specific constraint data
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrDelete(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSDELETE  ((*consdelete))     /**< free specific constraint data */
   );

/** sets method of constraint handler to transform constraint data into data belonging to the transformed problem
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrTrans(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSTRANS   ((*constrans))      /**< transform constraint data into data belonging to the transformed problem */
   );

/** sets method of constraint handler to initialize LP with relaxations of "initial" constraints
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrInitlp(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSINITLP  ((*consinitlp))     /**< initialize LP with relaxations of "initial" constraints */
   );

/** sets propagation conflict resolving method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrResprop(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSRESPROP ((*consresprop))    /**< propagation conflict resolving method */
   );

/** sets activation notification method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrActive(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSACTIVE  ((*consactive))     /**< activation notification method */
   );

/** sets deactivation notification method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrDeactive(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSDEACTIVE((*consdeactive))   /**< deactivation notification method */
   );

/** sets enabling notification method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrEnable(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSENABLE  ((*consenable))     /**< enabling notification method */
   );

/** sets disabling notification method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrDisable(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSDISABLE ((*consdisable))    /**< disabling notification method */
   );

/** sets variable deletion method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrDelvars(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSDELVARS ((*consdelvars))    /**< variable deletion method */
   );

/** sets constraint display method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrPrint(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSPRINT   ((*consprint))      /**< constraint display method */
   );

/** sets constraint parsing method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrParse(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSPARSE   ((*consparse))      /**< constraint parsing method */
   );

/** sets constraint variable getter method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrGetVars(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSGETVARS ((*consgetvars))    /**< constraint variable getter method */
   );

/** sets constraint variable number getter method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrGetNVars(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSGETNVARS((*consgetnvars))   /**< constraint variable number getter method */
   );

/** sets diving enforcement method of constraint handler
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if SCIP is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetConshdlrGetDiveBdChgs(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
   SCIP_DECL_CONSGETDIVEBDCHGS((*consgetdivebdchgs)) /**< constraint handler diving solution enforcement method */
   );

/** returns the constraint handler of the given name, or NULL if not existing */
extern
SCIP_CONSHDLR* SCIPfindConshdlr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of constraint handler */
   );

/** returns the array of currently available constraint handlers */
extern
SCIP_CONSHDLR** SCIPgetConshdlrs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available constraint handlers */
extern
int SCIPgetNConshdlrs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** creates a conflict handler and includes it in SCIP
 *
 *  @note method has all conflict handler callbacks as arguments and is thus changed every time a new
 *        callback is added
 *        in future releases; consider using SCIPincludeConflicthdlrBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeConflicthdlr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of conflict handler */
   const char*           desc,               /**< description of conflict handler */
   int                   priority,           /**< priority of the conflict handler */
   SCIP_DECL_CONFLICTCOPY((*conflictcopy)),  /**< copy method of conflict handler or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_CONFLICTFREE((*conflictfree)),  /**< destructor of conflict handler */
   SCIP_DECL_CONFLICTINIT((*conflictinit)),  /**< initialize conflict handler */
   SCIP_DECL_CONFLICTEXIT((*conflictexit)),  /**< deinitialize conflict handler */
   SCIP_DECL_CONFLICTINITSOL((*conflictinitsol)),/**< solving process initialization method of conflict handler */
   SCIP_DECL_CONFLICTEXITSOL((*conflictexitsol)),/**< solving process deinitialization method of conflict handler */
   SCIP_DECL_CONFLICTEXEC((*conflictexec)),  /**< conflict processing method of conflict handler */
   SCIP_CONFLICTHDLRDATA* conflicthdlrdata   /**< conflict handler data */
   );

/** creates a conflict handler and includes it in SCIP with its most fundamental callbacks. All non-fundamental
 *  (or optional) callbacks as, e.g., init and exit callbacks, will be set to NULL.
 *  Optional callbacks can be set via specific setter functions SCIPsetConflicthdlrCopy(), SCIPsetConflicthdlrFree(),
 *  SCIPsetConflicthdlrInit(), SCIPsetConflicthdlrExit(), SCIPsetConflicthdlrInitsol(),
 *  and SCIPsetConflicthdlrExitsol()
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeConflicthdlr() instead
 */
extern
SCIP_RETCODE SCIPincludeConflicthdlrBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR**   conflicthdlrptr,    /**< reference to a conflict handler pointer, or NULL */
   const char*           name,               /**< name of conflict handler */
   const char*           desc,               /**< description of conflict handler */
   int                   priority,           /**< priority of the conflict handler */
   SCIP_DECL_CONFLICTEXEC((*conflictexec)),  /**< conflict processing method of conflict handler */
   SCIP_CONFLICTHDLRDATA* conflicthdlrdata   /**< conflict handler data */
   );

/** set copy method of conflict handler */
extern
SCIP_RETCODE SCIPsetConflicthdlrCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR*    conflicthdlr,       /**< conflict handler */
   SCIP_DECL_CONFLICTCOPY((*conflictcopy))   /**< copy method of conflict handler */
   );

/** set destructor of conflict handler */
extern
SCIP_RETCODE SCIPsetConflicthdlrFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR*    conflicthdlr,       /**< conflict handler */
   SCIP_DECL_CONFLICTFREE((*conflictfree))   /**< destructor of conflict handler */
   );

/** set initialization method of conflict handler */
extern
SCIP_RETCODE SCIPsetConflicthdlrInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR*    conflicthdlr,       /**< conflict handler */
   SCIP_DECL_CONFLICTINIT((*conflictinit))   /**< initialize conflict handler */
   );

/** set deinitialization method of conflict handler */
extern
SCIP_RETCODE SCIPsetConflicthdlrExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR*    conflicthdlr,       /**< conflict handler */
   SCIP_DECL_CONFLICTEXIT((*conflictexit))   /**< deinitialize conflict handler */
   );

/** set solving process initialization method of conflict handler */
extern
SCIP_RETCODE SCIPsetConflicthdlrInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR*    conflicthdlr,       /**< conflict handler */
   SCIP_DECL_CONFLICTINITSOL((*conflictinitsol))/**< solving process initialization method of conflict handler */
   );

/** set solving process deinitialization method of conflict handler */
extern
SCIP_RETCODE SCIPsetConflicthdlrExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR*    conflicthdlr,       /**< conflict handler */
   SCIP_DECL_CONFLICTEXITSOL((*conflictexitsol))/**< solving process deinitialization method of conflict handler */
   );

/** returns the conflict handler of the given name, or NULL if not existing */
extern
SCIP_CONFLICTHDLR* SCIPfindConflicthdlr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of conflict handler */
   );

/** returns the array of currently available conflict handlers */
extern
SCIP_CONFLICTHDLR** SCIPgetConflicthdlrs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available conflict handlers */
extern
int SCIPgetNConflicthdlrs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a conflict handler */
extern
SCIP_RETCODE SCIPsetConflicthdlrPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONFLICTHDLR*    conflicthdlr,       /**< conflict handler */
   int                   priority            /**< new priority of the conflict handler */
   );

/** creates a presolver and includes it in SCIP
 *
 *  @note method has all presolver callbacks as arguments and is thus changed every time a new
 *        callback is added
 *        in future releases; consider using SCIPincludePresolBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludePresol(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of presolver */
   const char*           desc,               /**< description of presolver */
   int                   priority,           /**< priority of the presolver (>= 0: before, < 0: after constraint handlers) */
   int                   maxrounds,          /**< maximal number of presolving rounds the presolver participates in (-1: no limit) */
   SCIP_PRESOLTIMING     timing,             /**< timing mask of the presolver */
   SCIP_DECL_PRESOLCOPY  ((*presolcopy)),    /**< copy method of presolver or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_PRESOLFREE  ((*presolfree)),    /**< destructor of presolver to free user data (called when SCIP is exiting) */
   SCIP_DECL_PRESOLINIT  ((*presolinit)),    /**< initialization method of presolver (called after problem was transformed) */
   SCIP_DECL_PRESOLEXIT  ((*presolexit)),    /**< deinitialization method of presolver (called before transformed problem is freed) */
   SCIP_DECL_PRESOLINITPRE((*presolinitpre)),/**< presolving initialization method of presolver (called when presolving is about to begin) */
   SCIP_DECL_PRESOLEXITPRE((*presolexitpre)),/**< presolving deinitialization method of presolver (called after presolving has been finished) */
   SCIP_DECL_PRESOLEXEC  ((*presolexec)),    /**< execution method of presolver */
   SCIP_PRESOLDATA*      presoldata          /**< presolver data */
   );

/** Creates a presolver and includes it in SCIP with its fundamental callback. All non-fundamental (or optional)
 *  callbacks as, e.g., init and exit callbacks, will be set to NULL. Optional callbacks can be set via specific setter
 *  functions. These are SCIPsetPresolCopy(), SCIPsetPresolFree(), SCIPsetPresolInit(), SCIPsetPresolExit(),
 *  SCIPsetPresolInitpre(), and SCIPsetPresolExitPre().
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludePresol() instead
 */
extern
SCIP_RETCODE SCIPincludePresolBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL**         presolptr,          /**< reference to presolver, or NULL */
   const char*           name,               /**< name of presolver */
   const char*           desc,               /**< description of presolver */
   int                   priority,           /**< priority of the presolver (>= 0: before, < 0: after constraint handlers) */
   int                   maxrounds,          /**< maximal number of presolving rounds the presolver participates in (-1: no limit) */
   SCIP_PRESOLTIMING     timing,             /**< timing mask of the presolver */
   SCIP_DECL_PRESOLEXEC  ((*presolexec)),    /**< execution method of presolver */
   SCIP_PRESOLDATA*      presoldata          /**< presolver data */
   );

/** sets copy method of presolver */
extern
SCIP_RETCODE SCIPsetPresolCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL*          presol,             /**< presolver */
   SCIP_DECL_PRESOLCOPY  ((*presolcopy))     /**< copy method of presolver or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of presolver */
extern
SCIP_RETCODE SCIPsetPresolFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL*          presol,             /**< presolver */
   SCIP_DECL_PRESOLFREE ((*presolfree))      /**< destructor of presolver */
   );

/** sets initialization method of presolver */
extern
SCIP_RETCODE SCIPsetPresolInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL*          presol,             /**< presolver */
   SCIP_DECL_PRESOLINIT  ((*presolinit))     /**< initialize presolver */
   );

/** sets deinitialization method of presolver */
extern
SCIP_RETCODE SCIPsetPresolExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL*          presol,             /**< presolver */
   SCIP_DECL_PRESOLEXIT  ((*presolexit))     /**< deinitialize presolver */
   );

/** sets solving process initialization method of presolver */
extern
SCIP_RETCODE SCIPsetPresolInitpre(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL*          presol,             /**< presolver */
   SCIP_DECL_PRESOLINITPRE ((*presolinitpre))/**< solving process initialization method of presolver */
   );

/** sets solving process deinitialization method of presolver */
SCIP_RETCODE SCIPsetPresolExitpre(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL*          presol,             /**< presolver */
   SCIP_DECL_PRESOLEXITPRE ((*presolexitpre))/**< solving process deinitialization method of presolver */
   );

/** returns the presolver of the given name, or NULL if not existing */
extern
SCIP_PRESOL* SCIPfindPresol(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of presolver */
   );

/** returns the array of currently available presolvers */
extern
SCIP_PRESOL** SCIPgetPresols(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available presolvers */
extern
int SCIPgetNPresols(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a presolver */
extern
SCIP_RETCODE SCIPsetPresolPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PRESOL*          presol,             /**< presolver */
   int                   priority            /**< new priority of the presolver */
   );

/** creates a relaxation handler and includes it in SCIP
 *
 *  @note method has all relaxation handler callbacks as arguments and is thus changed every time a new
 *        callback is added
 *        in future releases; consider using SCIPincludeRelaxBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeRelax(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of relaxation handler */
   const char*           desc,               /**< description of relaxation handler */
   int                   priority,           /**< priority of the relaxation handler (negative: after LP, non-negative: before LP) */
   int                   freq,               /**< frequency for calling relaxation handler */
   SCIP_DECL_RELAXCOPY   ((*relaxcopy)),     /**< copy method of relaxation handler or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_RELAXFREE   ((*relaxfree)),     /**< destructor of relaxation handler */
   SCIP_DECL_RELAXINIT   ((*relaxinit)),     /**< initialize relaxation handler */
   SCIP_DECL_RELAXEXIT   ((*relaxexit)),     /**< deinitialize relaxation handler */
   SCIP_DECL_RELAXINITSOL((*relaxinitsol)),  /**< solving process initialization method of relaxation handler */
   SCIP_DECL_RELAXEXITSOL((*relaxexitsol)),  /**< solving process deinitialization method of relaxation handler */
   SCIP_DECL_RELAXEXEC   ((*relaxexec)),     /**< execution method of relaxation handler */
   SCIP_RELAXDATA*       relaxdata           /**< relaxation handler data */
   );

/** creates a relaxation handler and includes it in SCIP. All non fundamental
 *  (or optional) callbacks as, e.g., init and exit callbacks, will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetRelaxInit(), SCIPsetRelaxExit(),
 *  SCIPsetRelaxCopy(), SCIPsetRelaxFree(), SCIPsetRelaxInitsol(), and SCIPsetRelaxExitsol()
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeRelax() instead
 */
extern
SCIP_RETCODE SCIPincludeRelaxBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX**          relaxptr,           /**< reference to relaxation pointer, or NULL */
   const char*           name,               /**< name of relaxation handler */
   const char*           desc,               /**< description of relaxation handler */
   int                   priority,           /**< priority of the relaxation handler (negative: after LP, non-negative: before LP) */
   int                   freq,               /**< frequency for calling relaxation handler */
   SCIP_DECL_RELAXEXEC   ((*relaxexec)),     /**< execution method of relaxation handler */
   SCIP_RELAXDATA*       relaxdata           /**< relaxation handler data */
   );

/** sets copy method of relaxation handler */
extern
SCIP_RETCODE SCIPsetRelaxCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX*           relax,              /**< relaxation handler */
   SCIP_DECL_RELAXCOPY   ((*relaxcopy))      /**< copy method of relaxation handler or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of relaxation handler */
extern
SCIP_RETCODE SCIPsetRelaxFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX*           relax,              /**< relaxation handler */
   SCIP_DECL_RELAXFREE   ((*relaxfree))      /**< destructor of relaxation handler */
   );

/** sets initialization method of relaxation handler */
extern
SCIP_RETCODE SCIPsetRelaxInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX*           relax,              /**< relaxation handler */
   SCIP_DECL_RELAXINIT   ((*relaxinit))      /**< initialize relaxation handler */
   );

/** sets deinitialization method of relaxation handler */
extern
SCIP_RETCODE SCIPsetRelaxExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX*           relax,              /**< relaxation handler */
   SCIP_DECL_RELAXEXIT   ((*relaxexit))      /**< deinitialize relaxation handler */
   );

/** sets solving process initialization method of relaxation handler */
extern
SCIP_RETCODE SCIPsetRelaxInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX*           relax,              /**< relaxation handler */
   SCIP_DECL_RELAXINITSOL((*relaxinitsol))   /**< solving process initialization method of relaxation handler */
   );

/** sets solving process deinitialization method of relaxation handler */
extern
SCIP_RETCODE SCIPsetRelaxExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX*           relax,              /**< relaxation handler */
   SCIP_DECL_RELAXEXITSOL((*relaxexitsol))   /**< solving process deinitialization method of relaxation handler */
   );

/** returns the relaxation handler of the given name, or NULL if not existing */
extern
SCIP_RELAX* SCIPfindRelax(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of relaxation handler */
   );

/** returns the array of currently available relaxation handlers  */
extern
SCIP_RELAX** SCIPgetRelaxs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available relaxation handlers  */
extern
int SCIPgetNRelaxs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a relaxation handler*/
extern
SCIP_RETCODE SCIPsetRelaxPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_RELAX*           relax,              /**< relaxation handler */
   int                   priority            /**< new priority of the relaxation handler */
   );

/** creates a separator and includes it in SCIP.
 *
 *  @note method has all separator callbacks as arguments and is thus changed every time a new
 *        callback is added
 *        in future releases; consider using SCIPincludeSepaBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeSepa(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of separator */
   const char*           desc,               /**< description of separator */
   int                   priority,           /**< priority of separator (>= 0: before, < 0: after constraint handlers) */
   int                   freq,               /**< frequency for calling separator */
   SCIP_Real             maxbounddist,       /**< maximal relative distance from current node's dual bound to primal bound compared
                                              *   to best node's dual bound for applying separation */
   SCIP_Bool             usessubscip,        /**< does the separator use a secondary SCIP instance? */
   SCIP_Bool             delay,              /**< should separator be delayed, if other separators found cuts? */
   SCIP_DECL_SEPACOPY    ((*sepacopy)),      /**< copy method of separator or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_SEPAFREE    ((*sepafree)),      /**< destructor of separator */
   SCIP_DECL_SEPAINIT    ((*sepainit)),      /**< initialize separator */
   SCIP_DECL_SEPAEXIT    ((*sepaexit)),      /**< deinitialize separator */
   SCIP_DECL_SEPAINITSOL ((*sepainitsol)),   /**< solving process initialization method of separator */
   SCIP_DECL_SEPAEXITSOL ((*sepaexitsol)),   /**< solving process deinitialization method of separator */
   SCIP_DECL_SEPAEXECLP  ((*sepaexeclp)),    /**< LP solution separation method of separator */
   SCIP_DECL_SEPAEXECSOL ((*sepaexecsol)),   /**< arbitrary primal solution separation method of separator */
   SCIP_SEPADATA*        sepadata            /**< separator data */
   );

/** creates a separator and includes it in SCIP with its most fundamental callbacks. All non-fundamental
 *  (or optional) callbacks as, e.g., init and exit callbacks, will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetSepaInit(), SCIPsetSepaFree(),
 *  SCIPsetSepaInitsol(), SCIPsetSepaExitsol(), SCIPsetSepaCopy(), SCIPsetExit().
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeSepa() instead
 */
extern
SCIP_RETCODE SCIPincludeSepaBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA**           sepa,               /**< reference to a separator, or NULL */
   const char*           name,               /**< name of separator */
   const char*           desc,               /**< description of separator */
   int                   priority,           /**< priority of separator (>= 0: before, < 0: after constraint handlers) */
   int                   freq,               /**< frequency for calling separator */
   SCIP_Real             maxbounddist,       /**< maximal relative distance from current node's dual bound to primal bound compared
                                              *   to best node's dual bound for applying separation */
   SCIP_Bool             usessubscip,        /**< does the separator use a secondary SCIP instance? */
   SCIP_Bool             delay,              /**< should separator be delayed, if other separators found cuts? */
   SCIP_DECL_SEPAEXECLP  ((*sepaexeclp)),    /**< LP solution separation method of separator */
   SCIP_DECL_SEPAEXECSOL ((*sepaexecsol)),   /**< arbitrary primal solution separation method of separator */
   SCIP_SEPADATA*        sepadata            /**< separator data */
   );

/** sets copy method of separator */
extern
SCIP_RETCODE SCIPsetSepaCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA*            sepa,               /**< separator */
   SCIP_DECL_SEPACOPY    ((*sepacopy))       /**< copy method of separator or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of separator */
extern
SCIP_RETCODE SCIPsetSepaFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA*            sepa,               /**< separator */
   SCIP_DECL_SEPAFREE    ((*sepafree))       /**< destructor of separator */
   );

/** sets initialization method of separator */
extern
SCIP_RETCODE SCIPsetSepaInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA*            sepa,               /**< separator */
   SCIP_DECL_SEPAINIT    ((*sepainit))       /**< initialize separator */
   );

/** sets deinitialization method of separator */
extern
SCIP_RETCODE SCIPsetSepaExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA*            sepa,               /**< separator */
   SCIP_DECL_SEPAEXIT    ((*sepaexit))       /**< deinitialize separator */
   );

/** sets solving process initialization method of separator */
extern
SCIP_RETCODE SCIPsetSepaInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA*            sepa,               /**< separator */
   SCIP_DECL_SEPAINITSOL ((*sepainitsol))    /**< solving process initialization method of separator */
   );

/** sets solving process deinitialization method of separator */
extern
SCIP_RETCODE SCIPsetSepaExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA*            sepa,               /**< separator */
   SCIP_DECL_SEPAEXITSOL ((*sepaexitsol))    /**< solving process deinitialization method of separator */
   );

/** returns the separator of the given name, or NULL if not existing */
extern
SCIP_SEPA* SCIPfindSepa(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of separator */
   );

/** returns the array of currently available separators */
extern
SCIP_SEPA** SCIPgetSepas(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available separators */
extern
int SCIPgetNSepas(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a separator */
extern
SCIP_RETCODE SCIPsetSepaPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SEPA*            sepa,               /**< separator */
   int                   priority            /**< new priority of the separator */
   );

/** creates a propagator and includes it in SCIP.
 *
 *  @note method has all propagator callbacks as arguments and is thus changed every time a new
 *        callback is added in future releases; consider using SCIPincludePropBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeProp(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of propagator */
   const char*           desc,               /**< description of propagator */
   int                   priority,           /**< priority of the propagator (>= 0: before, < 0: after constraint handlers) */
   int                   freq,               /**< frequency for calling propagator */
   SCIP_Bool             delay,              /**< should propagator be delayed, if other propagators found reductions? */
   SCIP_PROPTIMING       timingmask,         /**< positions in the node solving loop where propagator should be executed */
   int                   presolpriority,     /**< presolving priority of the propagator (>= 0: before, < 0: after constraint handlers) */
   int                   presolmaxrounds,    /**< maximal number of presolving rounds the propagator participates in (-1: no limit) */
   SCIP_PRESOLTIMING     presoltiming,       /**< timing mask of the propagator's presolving method */
   SCIP_DECL_PROPCOPY    ((*propcopy)),      /**< copy method of propagator or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_PROPFREE    ((*propfree)),      /**< destructor of propagator */
   SCIP_DECL_PROPINIT    ((*propinit)),      /**< initialize propagator */
   SCIP_DECL_PROPEXIT    ((*propexit)),      /**< deinitialize propagator */
   SCIP_DECL_PROPINITPRE ((*propinitpre)),   /**< presolving initialization method of propagator */
   SCIP_DECL_PROPEXITPRE ((*propexitpre)),   /**< presolving deinitialization method of propagator */
   SCIP_DECL_PROPINITSOL ((*propinitsol)),   /**< solving process initialization method of propagator */
   SCIP_DECL_PROPEXITSOL ((*propexitsol)),   /**< solving process deinitialization method of propagator */
   SCIP_DECL_PROPPRESOL  ((*proppresol)),    /**< presolving method */
   SCIP_DECL_PROPEXEC    ((*propexec)),      /**< execution method of propagator */
   SCIP_DECL_PROPRESPROP ((*propresprop)),   /**< propagation conflict resolving method */
   SCIP_PROPDATA*        propdata            /**< propagator data */
   );

/** creates a propagator and includes it in SCIP. All non-fundamental (or optional) callbacks will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetPropInit(), SCIPsetPropExit(),
 *  SCIPsetPropCopy(), SCIPsetPropFree(), SCIPsetPropInitsol(), SCIPsetPropExitsol(),
 *  SCIPsetPropInitpre(), SCIPsetPropExitpre(), SCIPsetPropPresol(), and SCIPsetPropResprop().
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeProp() instead
 */
extern
SCIP_RETCODE SCIPincludePropBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP**           propptr,            /**< reference to a propagator pointer, or NULL */
   const char*           name,               /**< name of propagator */
   const char*           desc,               /**< description of propagator */
   int                   priority,           /**< priority of the propagator (>= 0: before, < 0: after constraint handlers) */
   int                   freq,               /**< frequency for calling propagator */
   SCIP_Bool             delay,              /**< should propagator be delayed, if other propagators found reductions? */
   SCIP_PROPTIMING       timingmask,         /**< positions in the node solving loop where propagators should be executed */
   SCIP_DECL_PROPEXEC    ((*propexec)),      /**< execution method of propagator */
   SCIP_PROPDATA*        propdata            /**< propagator data */
   );

/** sets copy method of propagator */
extern
SCIP_RETCODE SCIPsetPropCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPCOPY    ((*propcopy))       /**< copy method of propagator or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of propagator */
extern
SCIP_RETCODE SCIPsetPropFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPFREE    ((*propfree))       /**< destructor of propagator */
   );

/** sets initialization method of propagator */
extern
SCIP_RETCODE SCIPsetPropInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPINIT    ((*propinit))       /**< initialize propagator */
   );

/** sets deinitialization method of propagator */
extern
SCIP_RETCODE SCIPsetPropExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPEXIT    ((*propexit))       /**< deinitialize propagator */
   );

/** sets solving process initialization method of propagator */
extern
SCIP_RETCODE SCIPsetPropInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPINITSOL((*propinitsol))     /**< solving process initialization method of propagator */
   );

/** sets solving process deinitialization method of propagator */
extern
SCIP_RETCODE SCIPsetPropExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPEXITSOL ((*propexitsol))    /**< solving process deinitialization method of propagator */
   );

/** sets preprocessing initialization method of propagator */
extern
SCIP_RETCODE SCIPsetPropInitpre(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPINITPRE((*propinitpre))     /**< preprocessing initialization method of propagator */
   );

/** sets preprocessing deinitialization method of propagator */
extern
SCIP_RETCODE SCIPsetPropExitpre(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPEXITPRE((*propexitpre))     /**< preprocessing deinitialization method of propagator */
   );

/** sets presolving method of propagator */
extern
SCIP_RETCODE SCIPsetPropPresol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPPRESOL((*proppresol)),      /**< presolving method of propagator */
   int                   presolpriority,     /**< presolving priority of the propagator (>= 0: before, < 0: after constraint handlers) */
   int                   presolmaxrounds,    /**< maximal number of presolving rounds the propagator participates in (-1: no limit) */
   SCIP_PRESOLTIMING     presoltiming        /**< timing mask of the propagator's presolving method */
   );

/** sets propagation conflict resolving callback of propagator */
extern
SCIP_RETCODE SCIPsetPropResprop(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   SCIP_DECL_PROPRESPROP ((*propresprop))    /**< propagation conflict resolving callback */
   );

/** returns the propagator of the given name, or NULL if not existing */
extern
SCIP_PROP* SCIPfindProp(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of propagator */
   );

/** returns the array of currently available propagators */
extern
SCIP_PROP** SCIPgetProps(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available propagators */
extern
int SCIPgetNProps(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a propagator */
extern
SCIP_RETCODE SCIPsetPropPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   int                   priority            /**< new priority of the propagator */
   );

/** sets the presolving priority of a propagator */
extern
SCIP_RETCODE SCIPsetPropPresolPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop,               /**< propagator */
   int                   presolpriority      /**< new presol priority of the propagator */
   );


/** creates a primal heuristic and includes it in SCIP.
 *
 *  @note method has all heuristic callbacks as arguments and is thus changed every time a new
 *        callback is added in future releases; consider using SCIPincludeHeurBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPincludeHeur(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of primal heuristic */
   const char*           desc,               /**< description of primal heuristic */
   char                  dispchar,           /**< display character of primal heuristic */
   int                   priority,           /**< priority of the primal heuristic */
   int                   freq,               /**< frequency for calling primal heuristic */
   int                   freqofs,            /**< frequency offset for calling primal heuristic */
   int                   maxdepth,           /**< maximal depth level to call heuristic at (-1: no limit) */
   unsigned int          timingmask,         /**< positions in the node solving loop where heuristic should be executed;
                                              *   see definition of SCIP_HeurTiming for possible values */
   SCIP_Bool             usessubscip,        /**< does the heuristic use a secondary SCIP instance? */
   SCIP_DECL_HEURCOPY    ((*heurcopy)),      /**< copy method of primal heuristic or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_HEURFREE    ((*heurfree)),      /**< destructor of primal heuristic */
   SCIP_DECL_HEURINIT    ((*heurinit)),      /**< initialize primal heuristic */
   SCIP_DECL_HEUREXIT    ((*heurexit)),      /**< deinitialize primal heuristic */
   SCIP_DECL_HEURINITSOL ((*heurinitsol)),   /**< solving process initialization method of primal heuristic */
   SCIP_DECL_HEUREXITSOL ((*heurexitsol)),   /**< solving process deinitialization method of primal heuristic */
   SCIP_DECL_HEUREXEC    ((*heurexec)),      /**< execution method of primal heuristic */
   SCIP_HEURDATA*        heurdata            /**< primal heuristic data */
   );

/** creates a primal heuristic and includes it in SCIP with its most fundamental callbacks.
 *  All non-fundamental (or optional) callbacks
 *  as, e. g., init and exit callbacks, will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetHeurCopy(), SCIPsetHeurFree(),
 *  SCIPsetHeurInit(), SCIPsetHeurExit(), SCIPsetHeurInitsol(), and SCIPsetHeurExitsol()
 *
*  @note if you want to set all callbacks with a single method call, consider using SCIPincludeHeur() instead
 */
extern
SCIP_RETCODE SCIPincludeHeurBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR**           heur,               /**< pointer to the heuristic */
   const char*           name,               /**< name of primal heuristic */
   const char*           desc,               /**< description of primal heuristic */
   char                  dispchar,           /**< display character of primal heuristic */
   int                   priority,           /**< priority of the primal heuristic */
   int                   freq,               /**< frequency for calling primal heuristic */
   int                   freqofs,            /**< frequency offset for calling primal heuristic */
   int                   maxdepth,           /**< maximal depth level to call heuristic at (-1: no limit) */
   unsigned int          timingmask,         /**< positions in the node solving loop where heuristic should be executed;
                                              *   see definition of SCIP_HeurTiming for possible values */
   SCIP_Bool             usessubscip,        /**< does the heuristic use a secondary SCIP instance? */
   SCIP_DECL_HEUREXEC    ((*heurexec)),      /**< execution method of primal heuristic */
   SCIP_HEURDATA*        heurdata            /**< primal heuristic data */
   );

/** sets copy method of primal heuristic */
extern
SCIP_RETCODE SCIPsetHeurCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR*            heur,               /**< primal heuristic */
   SCIP_DECL_HEURCOPY    ((*heurcopy))       /**< copy method of primal heuristic or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of primal heuristic */
extern
SCIP_RETCODE SCIPsetHeurFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR*            heur,               /**< primal heuristic */
   SCIP_DECL_HEURFREE    ((*heurfree))       /**< destructor of primal heuristic */
   );

/** sets initialization method of primal heuristic */
extern
SCIP_RETCODE SCIPsetHeurInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR*            heur,               /**< primal heuristic */
   SCIP_DECL_HEURINIT    ((*heurinit))       /**< initialize primal heuristic */
   );

/** sets deinitialization method of primal heuristic */
extern
SCIP_RETCODE SCIPsetHeurExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR*            heur,               /**< primal heuristic */
   SCIP_DECL_HEUREXIT    ((*heurexit))       /**< deinitialize primal heuristic */
   );

/** sets solving process initialization method of primal heuristic */
extern
SCIP_RETCODE SCIPsetHeurInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR*            heur,               /**< primal heuristic */
   SCIP_DECL_HEURINITSOL ((*heurinitsol))    /**< solving process initialization method of primal heuristic */
   );

/** sets solving process deinitialization method of primal heuristic */
extern
SCIP_RETCODE SCIPsetHeurExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR*            heur,               /**< primal heuristic */
   SCIP_DECL_HEUREXITSOL ((*heurexitsol))    /**< solving process deinitialization method of primal heuristic */
   );

/** returns the primal heuristic of the given name, or NULL if not existing */
extern
SCIP_HEUR* SCIPfindHeur(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of primal heuristic */
   );

/** returns the array of currently available primal heuristics */
extern
SCIP_HEUR** SCIPgetHeurs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available primal heuristics */
extern
int SCIPgetNHeurs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a primal heuristic */
extern
SCIP_RETCODE SCIPsetHeurPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_HEUR*            heur,               /**< primal heuristic */
   int                   priority            /**< new priority of the primal heuristic */
   );

/** creates a tree compression and includes it in SCIP.
 *
 *  @note method has all compression callbacks as arguments and is thus changed every time a new
 *        callback is added in future releases; consider using SCIPincludeComprBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeCompr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of tree compression */
   const char*           desc,               /**< description of tree compression */
   int                   priority,           /**< priority of the tree compression */
   int                   minnnodes,          /**< minimal number of nodes to call compression */
   SCIP_DECL_COMPRCOPY   ((*comprcopy)),     /**< copy method of tree compression or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_COMPRFREE   ((*comprfree)),     /**< destructor of tree compression */
   SCIP_DECL_COMPRINIT   ((*comprinit)),     /**< initialize tree compression */
   SCIP_DECL_COMPREXIT   ((*comprexit)),     /**< deinitialize tree compression */
   SCIP_DECL_COMPRINITSOL ((*comprinitsol)), /**< solving process initialization method of tree compression */
   SCIP_DECL_COMPREXITSOL ((*comprexitsol)), /**< solving process deinitialization method of tree compression */
   SCIP_DECL_COMPREXEC   ((*comprexec)),     /**< execution method of tree compression */
   SCIP_COMPRDATA*       comprdata           /**< tree compression data */
   );

/** creates a tree compression and includes it in SCIP with its most fundamental callbacks.
 *  All non-fundamental (or optional) callbacks
 *  as, e. g., init and exit callbacks, will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetComprCopy(), SCIPsetComprFree(),
 *  SCIPsetComprInit(), SCIPsetComprExit(), SCIPsetComprInitsol(), and SCIPsetComprExitsol()
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeCompr() instead
 */
extern
SCIP_RETCODE SCIPincludeComprBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR**          compr,              /**< pointer to tree compression */
   const char*           name,               /**< name of tree compression */
   const char*           desc,               /**< description of tree compression */
   int                   priority,           /**< priority of the tree compression */
   int                   minnnodes,          /**< minimal number of nodes to call the compression */
   SCIP_DECL_COMPREXEC   ((*comprexec)),     /**< execution method of tree compression */
   SCIP_COMPRDATA*       comprdata           /**< tree compression data */
   );

/** sets copy method of tree compression */
extern
SCIP_RETCODE SCIPsetComprCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR*           compr,              /**< tree compression */
   SCIP_DECL_COMPRCOPY   ((*comprcopy))      /**< copy method of tree compression or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of tree compression */
extern
SCIP_RETCODE SCIPsetComprFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR*           compr,              /**< tree compression */
   SCIP_DECL_COMPRFREE   ((*comprfree))      /**< destructor of tree compression */
   );

/** sets initialization method of tree compression */
extern
SCIP_RETCODE SCIPsetComprInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR*           compr,              /**< tree compression */
   SCIP_DECL_COMPRINIT   ((*comprinit))      /**< initialize tree compression */
   );

/** sets deinitialization method of tree compression */
extern
SCIP_RETCODE SCIPsetComprExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR*           compr,              /**< tree compression */
   SCIP_DECL_COMPREXIT   ((*comprexit))      /**< deinitialize tree compression */
   );

/** sets solving process initialization method of tree compression */
extern
SCIP_RETCODE SCIPsetComprInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR*           compr,              /**< tree compression */
   SCIP_DECL_COMPRINITSOL ((*comprinitsol))  /**< solving process initialization method of tree compression */
   );

/** sets solving process deinitialization method of tree compression */
extern
SCIP_RETCODE SCIPsetComprExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR*           compr,              /**< tree compression */
   SCIP_DECL_COMPREXITSOL ((*comprexitsol))  /**< solving process deinitialization method of tree compression */
   );

/** returns the tree compression of the given name, or NULL if not existing */
extern
SCIP_COMPR* SCIPfindCompr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of tree compression */
   );

/** returns the array of currently available tree compression */
extern
SCIP_COMPR** SCIPgetComprs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available tree compression */
extern
int SCIPgetNCompr(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** set the priority of a tree compression method */
SCIP_RETCODE SCIPsetComprPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_COMPR*           compr,              /**< compression */
   int                   priority            /**< new priority of the tree compression */
   );

/** create a diving set associated with a primal heuristic. The primal heuristic needs to be included
 *  before this method can be called. The diveset is installed in the array of divesets of the heuristic
 *  and can be retrieved later by accessing SCIPheurGetDivesets()
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPcreateDiveset(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIVESET**        diveset,            /**< pointer to created diving heuristic settings, or NULL if not needed */
   SCIP_HEUR*            heur,               /**< primal heuristic to which the diveset belongs */
   const char*           name,               /**< name for the diveset, or NULL if the name of the heuristic should be used */
   SCIP_Real             minreldepth,        /**< minimal relative depth to start diving */
   SCIP_Real             maxreldepth,        /**< maximal relative depth to start diving */
   SCIP_Real             maxlpiterquot,      /**< maximal fraction of diving LP iterations compared to node LP iterations */
   SCIP_Real             maxdiveubquot,      /**< maximal quotient (curlowerbound - lowerbound)/(cutoffbound - lowerbound)
                                              *   where diving is performed (0.0: no limit) */
   SCIP_Real             maxdiveavgquot,     /**< maximal quotient (curlowerbound - lowerbound)/(avglowerbound - lowerbound)
                                              *   where diving is performed (0.0: no limit) */
   SCIP_Real             maxdiveubquotnosol, /**< maximal UBQUOT when no solution was found yet (0.0: no limit) */
   SCIP_Real             maxdiveavgquotnosol,/**< maximal AVGQUOT when no solution was found yet (0.0: no limit) */
   SCIP_Real             lpresolvedomchgquot,/**< percentage of immediate domain changes during probing to trigger LP resolve */
   int                   lpsolvefreq,        /**< LP solve frequency for (0: only if enough domain reductions are found by propagation)*/
   int                   maxlpiterofs,       /**< additional number of allowed LP iterations */
   SCIP_Bool             backtrack,          /**< use one level of backtracking if infeasibility is encountered? */
   SCIP_Bool             onlylpbranchcands,  /**< should only LP branching candidates be considered instead of the slower but
                                              *   more general constraint handler diving variable selection? */
   SCIP_Bool             specificsos1score,  /**< should SOS1 variables be scored by the diving heuristics specific score function;
                                              *   otherwise use the score function of the SOS1 constraint handler */
   SCIP_DECL_DIVESETGETSCORE((*divesetgetscore))  /**< method for candidate score and rounding direction */

   );

/** creates an event handler and includes it in SCIP
 *
 *  @note method has all event handler callbacks as arguments and is thus changed every time a new
 *        callback is added in future releases; consider using SCIPincludeEventhdlrBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeEventhdlr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of event handler */
   const char*           desc,               /**< description of event handler */
   SCIP_DECL_EVENTCOPY   ((*eventcopy)),     /**< copy method of event handler or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_EVENTFREE   ((*eventfree)),     /**< destructor of event handler */
   SCIP_DECL_EVENTINIT   ((*eventinit)),     /**< initialize event handler */
   SCIP_DECL_EVENTEXIT   ((*eventexit)),     /**< deinitialize event handler */
   SCIP_DECL_EVENTINITSOL((*eventinitsol)),  /**< solving process initialization method of event handler */
   SCIP_DECL_EVENTEXITSOL((*eventexitsol)),  /**< solving process deinitialization method of event handler */
   SCIP_DECL_EVENTDELETE ((*eventdelete)),   /**< free specific event data */
   SCIP_DECL_EVENTEXEC   ((*eventexec)),     /**< execute event handler */
   SCIP_EVENTHDLRDATA*   eventhdlrdata       /**< event handler data */
   );

/** creates an event handler and includes it in SCIP with all its non-fundamental callbacks set
 *  to NULL; if needed, non-fundamental callbacks can be set afterwards via setter functions
 *  SCIPsetEventhdlrCopy(), SCIPsetEventhdlrFree(), SCIPsetEventhdlrInit(), SCIPsetEventhdlrExit(),
 *  SCIPsetEventhdlrInitsol(), SCIPsetEventhdlrExitsol(), and SCIPsetEventhdlrDelete()
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeEventhdlr() instead
 */
extern
SCIP_RETCODE SCIPincludeEventhdlrBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_EVENTHDLR**      eventhdlrptr,       /**< reference to an event handler, or NULL */
   const char*           name,               /**< name of event handler */
   const char*           desc,               /**< description of event handler */
   SCIP_DECL_EVENTEXEC   ((*eventexec)),     /**< execute event handler */
   SCIP_EVENTHDLRDATA*   eventhdlrdata       /**< event handler data */
   );

/** sets copy callback of the event handler */
extern
SCIP_RETCODE SCIPsetEventhdlrCopy(
   SCIP*                 scip,               /**< scip instance */
   SCIP_EVENTHDLR*       eventhdlr,          /**< event handler */
   SCIP_DECL_EVENTCOPY   ((*eventcopy))      /**< copy callback of the event handler */
   );

/** sets deinitialization callback of the event handler */
extern
SCIP_RETCODE SCIPsetEventhdlrFree(
   SCIP*                 scip,               /**< scip instance */
   SCIP_EVENTHDLR*       eventhdlr,          /**< event handler */
   SCIP_DECL_EVENTFREE   ((*eventfree))      /**< deinitialization callback of the event handler */
   );

/** sets initialization callback of the event handler */
extern
SCIP_RETCODE SCIPsetEventhdlrInit(
   SCIP*                 scip,               /**< scip instance */
   SCIP_EVENTHDLR*       eventhdlr,          /**< event handler */
   SCIP_DECL_EVENTINIT   ((*eventinit))      /**< initialize event handler */
   );

/** sets deinitialization callback of the event handler */
extern
SCIP_RETCODE SCIPsetEventhdlrExit(
   SCIP*                 scip,               /**< scip instance */
   SCIP_EVENTHDLR*       eventhdlr,          /**< event handler */
   SCIP_DECL_EVENTEXIT   ((*eventexit))      /**< deinitialize event handler */
   );

/** sets solving process initialization callback of the event handler */
extern
SCIP_RETCODE SCIPsetEventhdlrInitsol(
   SCIP*                 scip,               /**< scip instance */
   SCIP_EVENTHDLR*       eventhdlr,          /**< event handler */
   SCIP_DECL_EVENTINITSOL((*eventinitsol))   /**< solving process initialization callback of event handler */
   );

/** sets solving process deinitialization callback of the event handler */
extern
SCIP_RETCODE SCIPsetEventhdlrExitsol(
   SCIP*                 scip,               /**< scip instance */
   SCIP_EVENTHDLR*       eventhdlr,          /**< event handler */
   SCIP_DECL_EVENTEXITSOL((*eventexitsol))   /**< solving process deinitialization callback of event handler */
   );

/** sets callback of the event handler to free specific event data */
extern
SCIP_RETCODE SCIPsetEventhdlrDelete(
   SCIP*                 scip,               /**< scip instance */
   SCIP_EVENTHDLR*       eventhdlr,          /**< event handler */
   SCIP_DECL_EVENTDELETE ((*eventdelete))    /**< free specific event data */
   );

/** returns the event handler of the given name, or NULL if not existing */
extern
SCIP_EVENTHDLR* SCIPfindEventhdlr(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of event handler */
   );

/** returns the array of currently available event handlers */
extern
SCIP_EVENTHDLR** SCIPgetEventhdlrs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available event handlers */
extern
int SCIPgetNEventhdlrs(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** creates a node selector and includes it in SCIP.
 *
 *  @note method has all node selector callbacks as arguments and is thus changed every time a new
 *        callback is added in future releases; consider using SCIPincludeNodeselBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeNodesel(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of node selector */
   const char*           desc,               /**< description of node selector */
   int                   stdpriority,        /**< priority of the node selector in standard mode */
   int                   memsavepriority,    /**< priority of the node selector in memory saving mode */
   SCIP_DECL_NODESELCOPY ((*nodeselcopy)),   /**< copy method of node selector or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_NODESELFREE ((*nodeselfree)),   /**< destructor of node selector */
   SCIP_DECL_NODESELINIT ((*nodeselinit)),   /**< initialize node selector */
   SCIP_DECL_NODESELEXIT ((*nodeselexit)),   /**< deinitialize node selector */
   SCIP_DECL_NODESELINITSOL((*nodeselinitsol)),/**< solving process initialization method of node selector */
   SCIP_DECL_NODESELEXITSOL((*nodeselexitsol)),/**< solving process deinitialization method of node selector */
   SCIP_DECL_NODESELSELECT((*nodeselselect)),/**< node selection method */
   SCIP_DECL_NODESELCOMP ((*nodeselcomp)),   /**< node comparison method */
   SCIP_NODESELDATA*     nodeseldata         /**< node selector data */
   );

/** Creates a node selector and includes it in SCIP with its most fundamental callbacks. All non-fundamental
 *  (or optional) callbacks as, e.g., init and exit callbacks, will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetNodeselCopy(), SCIPsetNodeselFree(),
 *  SCIPsetNodeselInit(), SCIPsetNodeselExit(), SCIPsetNodeselInitsol(), and SCIPsetNodeselExitsol()
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeNodesel() instead
 */
extern
SCIP_RETCODE SCIPincludeNodeselBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL**        nodesel,            /**< reference to a node selector, or NULL */
   const char*           name,               /**< name of node selector */
   const char*           desc,               /**< description of node selector */
   int                   stdpriority,        /**< priority of the node selector in standard mode */
   int                   memsavepriority,    /**< priority of the node selector in memory saving mode */
   SCIP_DECL_NODESELSELECT((*nodeselselect)),/**< node selection method */
   SCIP_DECL_NODESELCOMP ((*nodeselcomp)),   /**< node comparison method */
   SCIP_NODESELDATA*     nodeseldata         /**< node selector data */
   );

/** sets copy method of node selector */
extern
SCIP_RETCODE SCIPsetNodeselCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   SCIP_DECL_NODESELCOPY ((*nodeselcopy))    /**< copy method of node selector or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of node selector */
extern
SCIP_RETCODE SCIPsetNodeselFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   SCIP_DECL_NODESELFREE ((*nodeselfree))    /**< destructor of node selector */
   );

/** sets initialization method of node selector */
extern
SCIP_RETCODE SCIPsetNodeselInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   SCIP_DECL_NODESELINIT ((*nodeselinit))    /**< initialize node selector */
   );

/** sets deinitialization method of node selector */
extern
SCIP_RETCODE SCIPsetNodeselExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   SCIP_DECL_NODESELEXIT ((*nodeselexit))    /**< deinitialize node selector */
   );

/** sets solving process initialization method of node selector */
extern
SCIP_RETCODE SCIPsetNodeselInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   SCIP_DECL_NODESELINITSOL ((*nodeselinitsol))/**< solving process initialization method of node selector */
   );

/** sets solving process deinitialization method of node selector */
extern
SCIP_RETCODE SCIPsetNodeselExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   SCIP_DECL_NODESELEXITSOL ((*nodeselexitsol))/**< solving process deinitialization method of node selector */
   );

/** returns the node selector of the given name, or NULL if not existing */
extern
SCIP_NODESEL* SCIPfindNodesel(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of node selector */
   );

/** returns the array of currently available node selectors */
extern
SCIP_NODESEL** SCIPgetNodesels(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available node selectors */
extern
int SCIPgetNNodesels(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a node selector in standard mode */
extern
SCIP_RETCODE SCIPsetNodeselStdPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   int                   priority            /**< new standard priority of the node selector */
   );

/** sets the priority of a node selector in memory saving mode */
extern
SCIP_RETCODE SCIPsetNodeselMemsavePriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NODESEL*         nodesel,            /**< node selector */
   int                   priority            /**< new memory saving priority of the node selector */
   );

/** returns the currently used node selector */
extern
SCIP_NODESEL* SCIPgetNodesel(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** creates a branching rule and includes it in SCIP
 *
 *  @note method has all branching rule callbacks as arguments and is thus changed every time a new
 *        callback is added in future releases; consider using SCIPincludeBranchruleBasic() and setter functions
 *        if you seek for a method which is less likely to change in future releases
 */
extern
SCIP_RETCODE SCIPincludeBranchrule(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of branching rule */
   const char*           desc,               /**< description of branching rule */
   int                   priority,           /**< priority of the branching rule */
   int                   maxdepth,           /**< maximal depth level, up to which this branching rule should be used (or -1) */
   SCIP_Real             maxbounddist,       /**< maximal relative distance from current node's dual bound to primal bound
                                              *   compared to best node's dual bound for applying branching rule
                                              *   (0.0: only on current best node, 1.0: on all nodes) */
   SCIP_DECL_BRANCHCOPY  ((*branchcopy)),    /**< copy method of branching rule or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_BRANCHFREE  ((*branchfree)),    /**< destructor of branching rule */
   SCIP_DECL_BRANCHINIT  ((*branchinit)),    /**< initialize branching rule */
   SCIP_DECL_BRANCHEXIT  ((*branchexit)),    /**< deinitialize branching rule */
   SCIP_DECL_BRANCHINITSOL((*branchinitsol)),/**< solving process initialization method of branching rule */
   SCIP_DECL_BRANCHEXITSOL((*branchexitsol)),/**< solving process deinitialization method of branching rule */
   SCIP_DECL_BRANCHEXECLP((*branchexeclp)),  /**< branching execution method for fractional LP solutions */
   SCIP_DECL_BRANCHEXECEXT((*branchexecext)),/**< branching execution method for external candidates */
   SCIP_DECL_BRANCHEXECPS((*branchexecps)),  /**< branching execution method for not completely fixed pseudo solutions */
   SCIP_BRANCHRULEDATA*  branchruledata      /**< branching rule data */
   );

/** creates a branching rule and includes it in SCIP. All non-fundamental (or optional) callbacks will be set to NULL.
 *  Optional callbacks can be set via specific setter functions, see SCIPsetBranchruleInit(), SCIPsetBranchruleExit(),
 *  SCIPsetBranchruleCopy(), SCIPsetBranchruleFree(), SCIPsetBranchruleInitsol(), SCIPsetBranchruleExitsol(),
 *  SCIPsetBranchruleExecLp(), SCIPsetBranchruleExecExt(), and SCIPsetBranchruleExecPs().
 *
 *  @note if you want to set all callbacks with a single method call, consider using SCIPincludeBranchrule() instead
 */
extern
SCIP_RETCODE SCIPincludeBranchruleBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE**     branchruleptr,      /**< pointer to branching rule, or NULL */
   const char*           name,               /**< name of branching rule */
   const char*           desc,               /**< description of branching rule */
   int                   priority,           /**< priority of the branching rule */
   int                   maxdepth,           /**< maximal depth level, up to which this branching rule should be used (or -1) */
   SCIP_Real             maxbounddist,       /**< maximal relative distance from current node's dual bound to primal bound
                                              *   compared to best node's dual bound for applying branching rule
                                              *   (0.0: only on current best node, 1.0: on all nodes) */
   SCIP_BRANCHRULEDATA*  branchruledata      /**< branching rule data */
   );

/** sets copy method of branching rule */
extern
SCIP_RETCODE SCIPsetBranchruleCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHCOPY  ((*branchcopy))     /**< copy method of branching rule or NULL if you don't want to copy your plugin into sub-SCIPs */
   );

/** sets destructor method of branching rule */
extern
SCIP_RETCODE SCIPsetBranchruleFree(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHFREE  ((*branchfree))     /**< destructor of branching rule */
   );

/** sets initialization method of branching rule */
extern
SCIP_RETCODE SCIPsetBranchruleInit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHINIT  ((*branchinit))     /**< initialize branching rule */
   );

/** sets deinitialization method of branching rule */
extern
SCIP_RETCODE SCIPsetBranchruleExit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHEXIT  ((*branchexit))     /**< deinitialize branching rule */
   );

/** sets solving process initialization method of branching rule */
extern
SCIP_RETCODE SCIPsetBranchruleInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHINITSOL((*branchinitsol)) /**< solving process initialization method of branching rule */
   );

/** sets solving process deinitialization method of branching rule */
extern
SCIP_RETCODE SCIPsetBranchruleExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHEXITSOL((*branchexitsol)) /**< solving process deinitialization method of branching rule */
   );

/** sets branching execution method for fractional LP solutions */
extern
SCIP_RETCODE SCIPsetBranchruleExecLp(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHEXECLP((*branchexeclp))   /**< branching execution method for fractional LP solutions */
   );

/** sets branching execution method for external candidates  */
extern
SCIP_RETCODE SCIPsetBranchruleExecExt(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHEXECEXT((*branchexecext)) /**< branching execution method for external candidates */
   );

/** sets branching execution method for not completely fixed pseudo solutions */
extern
SCIP_RETCODE SCIPsetBranchruleExecPs(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_DECL_BRANCHEXECPS((*branchexecps))   /**< branching execution method for not completely fixed pseudo solutions */
   );

/** returns the branching rule of the given name, or NULL if not existing */
extern
SCIP_BRANCHRULE* SCIPfindBranchrule(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of branching rule */
   );

/** returns the array of currently available branching rules */
extern
SCIP_BRANCHRULE** SCIPgetBranchrules(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available branching rules */
extern
int SCIPgetNBranchrules(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of a branching rule */
extern
SCIP_RETCODE SCIPsetBranchrulePriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   int                   priority            /**< new priority of the branching rule */
   );

/** sets maximal depth level, up to which this branching rule should be used (-1 for no limit) */
extern
SCIP_RETCODE SCIPsetBranchruleMaxdepth(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   int                   maxdepth            /**< new maxdepth of the branching rule */
   );

/** sets maximal relative distance from current node's dual bound to primal bound for applying branching rule */
extern
SCIP_RETCODE SCIPsetBranchruleMaxbounddist(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BRANCHRULE*      branchrule,         /**< branching rule */
   SCIP_Real             maxbounddist        /**< new maxbounddist of the branching rule */
   );

/** creates a display column and includes it in SCIP */
extern
SCIP_RETCODE SCIPincludeDisp(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of display column */
   const char*           desc,               /**< description of display column */
   const char*           header,             /**< head line of display column */
   SCIP_DISPSTATUS       dispstatus,         /**< display activation status of display column */
   SCIP_DECL_DISPCOPY    ((*dispcopy)),      /**< copy method of display column or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_DISPFREE    ((*dispfree)),      /**< destructor of display column */
   SCIP_DECL_DISPINIT    ((*dispinit)),      /**< initialize display column */
   SCIP_DECL_DISPEXIT    ((*dispexit)),      /**< deinitialize display column */
   SCIP_DECL_DISPINITSOL ((*dispinitsol)),   /**< solving process initialization method of display column */
   SCIP_DECL_DISPEXITSOL ((*dispexitsol)),   /**< solving process deinitialization method of display column */
   SCIP_DECL_DISPOUTPUT  ((*dispoutput)),    /**< output method */
   SCIP_DISPDATA*        dispdata,           /**< display column data */
   int                   width,              /**< width of display column (no. of chars used) */
   int                   priority,           /**< priority of display column */
   int                   position,           /**< relative position of display column */
   SCIP_Bool             stripline           /**< should the column be separated with a line from its right neighbor? */
   );

/** returns the display column of the given name, or NULL if not existing */
extern
SCIP_DISP* SCIPfindDisp(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of display column */
   );

/** returns the array of currently available display columns */
extern
SCIP_DISP** SCIPgetDisps(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available display columns */
extern
int SCIPgetNDisps(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** automatically selects display columns for being shown w.r.t. the display width parameter */
extern
SCIP_RETCODE SCIPautoselectDisps(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** includes an NLPI in SCIP */
extern
SCIP_RETCODE SCIPincludeNlpi(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NLPI*            nlpi                /**< NLPI data structure */
   );

/** returns the NLPI of the given name, or NULL if not existing */
extern
SCIP_NLPI* SCIPfindNlpi(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of NLPI */
   );

/** returns the array of currently available NLPIs (sorted by priority) */
extern
SCIP_NLPI** SCIPgetNlpis(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently available NLPIs */
extern
int SCIPgetNNlpis(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets the priority of an NLPI */
extern
SCIP_RETCODE SCIPsetNlpiPriority(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_NLPI*            nlpi,               /**< NLPI */
   int                   priority            /**< new priority of the NLPI */
   );

/** includes information about an external code linked into the SCIP library */
extern
SCIP_RETCODE SCIPincludeExternalCodeInformation(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< name of external code */
   const char*           description         /**< description of external code, or NULL */
   );

/** returns an array of names of currently included external codes */
extern
char** SCIPgetExternalCodeNames(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns an array of the descriptions of currently included external codes
 *
 *  @note some descriptions may be NULL
 */
extern
char** SCIPgetExternalCodeDescriptions(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the number of currently included information on external codes */
extern
int SCIPgetNExternalCodes(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** prints information on external codes to a file stream via the message handler system
 *
 *  @note If the message handler is set to a NULL pointer nothing will be printed
 */
extern
void SCIPprintExternalCodes(
   SCIP*                 scip,               /**< SCIP data structure */
   FILE*                 file                /**< output file (or NULL for standard output) */
   );

/**@} */




/*
 * user interactive dialog methods
 */

/**@name User Interactive Dialog Methods */
/**@{ */

/** creates and includes dialog
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPincludeDialog(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIALOG**         dialog,             /**< pointer to store the dialog */
   SCIP_DECL_DIALOGCOPY  ((*dialogcopy)),    /**< copy method of dialog or NULL if you don't want to copy your plugin into sub-SCIPs */
   SCIP_DECL_DIALOGEXEC  ((*dialogexec)),    /**< execution method of dialog */
   SCIP_DECL_DIALOGDESC  ((*dialogdesc)),    /**< description output method of dialog, or NULL */
   SCIP_DECL_DIALOGFREE  ((*dialogfree)),    /**< destructor of dialog to free user data, or NULL */
   const char*           name,               /**< name of dialog: command name appearing in parent's dialog menu */
   const char*           desc,               /**< description of dialog used if description output method is NULL */
   SCIP_Bool             issubmenu,          /**< is the dialog a submenu? */
   SCIP_DIALOGDATA*      dialogdata          /**< user defined dialog data */
   );

/** returns if the dialog already exists
 *
 *  @return TRUE is returned if the dialog exits, otherwise FALSE.
 */
extern
SCIP_Bool SCIPexistsDialog(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIALOG*          dialog              /**< dialog */
   );

/** captures a dialog
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPcaptureDialog(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIALOG*          dialog              /**< dialog */
   );

/** releases a dialog
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPreleaseDialog(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIALOG**         dialog              /**< pointer to the dialog */
   );

/** makes given dialog the root dialog of SCIP's interactive user shell; captures dialog and releases former root dialog
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPsetRootDialog(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIALOG*          dialog              /**< dialog to be the root */
   );

/** returns the root dialog of SCIP's interactive user shell
 *
 *  @return the root dialog of SCIP's interactive user shell is returned.
 */
extern
SCIP_DIALOG* SCIPgetRootDialog(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** adds a sub dialog to the given dialog as menu entry and captures it
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddDialogEntry(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIALOG*          dialog,             /**< dialog to extend, or NULL for root dialog */
   SCIP_DIALOG*          subdialog           /**< subdialog to add as menu entry in dialog */
   );

/** adds a single line of input which is treated as if the user entered the command line
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddDialogInputLine(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           inputline           /**< input line to add */
   );

/** adds a single line of input to the command history which can be accessed with the cursor keys
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
extern
SCIP_RETCODE SCIPaddDialogHistoryLine(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           inputline           /**< input line to add */
   );

/** starts interactive mode of SCIP by executing the root dialog
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After calling this method \SCIP reaches one of the following stages depending on if and when the
 *        interactive shell was closed:
 *        - \ref SCIP_STAGE_PROBLEM if the interactive shell was closed after the problem was created
 *        - \ref SCIP_STAGE_TRANSFORMED if the interactive shell was closed after the problem was transformed
 *        - \ref SCIP_STAGE_PRESOLVING if the interactive shell was closed  during presolving
 *        - \ref SCIP_STAGE_PRESOLVED if the interactive shell was closed after presolve
 *        - \ref SCIP_STAGE_SOLVING if the interactive shell was closed during the tree search
 *        - \ref SCIP_STAGE_SOLVED if the interactive shell was closed after the problem was solved
 *        - \ref SCIP_STAGE_FREE if the interactive shell was closed after the problem was freed
 *
 *  See \ref SCIP_Stage "SCIP_STAGE" for a complete list of all possible solving stages.
 */
extern
SCIP_RETCODE SCIPstartInteraction(
   SCIP*                 scip                /**< SCIP data structure */
   );

/**@} */




/*
 * global problem methods
 */

/**@name Global Problem Methods */
/**@{ */

/** creates empty problem and initializes all solving data structures (the objective sense is set to MINIMIZE)
 *  If the problem type requires the use of variable pricers, these pricers should be added to the problem with calls
 *  to SCIPactivatePricer(). These pricers are automatically deactivated, when the problem is freed.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After calling this method, \SCIP reaches the following stage:
 *        - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPcreateProb(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name,               /**< problem name */
   SCIP_DECL_PROBDELORIG ((*probdelorig)),   /**< frees user data of original problem */
   SCIP_DECL_PROBTRANS   ((*probtrans)),     /**< creates user data of transformed problem by transforming original user data */
   SCIP_DECL_PROBDELTRANS((*probdeltrans)),  /**< frees user data of transformed problem */
   SCIP_DECL_PROBINITSOL ((*probinitsol)),   /**< solving process initialization method of transformed data */
   SCIP_DECL_PROBEXITSOL ((*probexitsol)),   /**< solving process deinitialization method of transformed data */
   SCIP_DECL_PROBCOPY    ((*probcopy)),      /**< copies user data if you want to copy it to a subscip, or NULL */
   SCIP_PROBDATA*        probdata            /**< user problem data set by the reader */
   );

/** creates empty problem and initializes all solving data structures (the objective sense is set to MINIMIZE)
 *  all callback methods will be set to NULL and can be set afterwards, if needed, via SCIPsetProbDelorig(),
 *  SCIPsetProbTrans(), SCIPsetProbDeltrans(), SCIPsetProbInitsol(), SCIPsetProbExitsol(), and
 *  SCIPsetProbCopy()
 *  If the problem type requires the use of variable pricers, these pricers should be added to the problem with calls
 *  to SCIPactivatePricer(). These pricers are automatically deactivated, when the problem is freed.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After calling this method, \SCIP reaches the following stage:
 *        - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPcreateProbBasic(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< problem name */
   );

/** sets callback to free user data of original problem
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
SCIP_RETCODE SCIPsetProbDelorig(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DECL_PROBDELORIG ((*probdelorig))    /**< frees user data of original problem */
   );

/** sets callback to create user data of transformed problem by transforming original user data
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetProbTrans(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DECL_PROBTRANS   ((*probtrans))      /**< creates user data of transformed problem by transforming original user data */
   );

/** sets callback to free user data of transformed problem
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetProbDeltrans(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DECL_PROBDELTRANS((*probdeltrans))   /**< frees user data of transformed problem */
   );

/** sets solving process initialization callback of transformed data
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetProbInitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DECL_PROBINITSOL ((*probinitsol))    /**< solving process initialization method of transformed data */
   );

/** sets solving process deinitialization callback of transformed data
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetProbExitsol(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DECL_PROBEXITSOL ((*probexitsol))    /**< solving process deinitialization method of transformed data */
   );

/** sets callback to copy user data to a subscip
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetProbCopy(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DECL_PROBCOPY    ((*probcopy))       /**< copies user data if you want to copy it to a subscip, or NULL */
   );

/** reads problem from file and initializes all solving data structures
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @post After the method was called, \SCIP is in one of the following stages:
 *       -\ref SCIP_STAGE_INIT if reading failed (usually, when a SCIP_READERROR occurs)
 *       - ref SCIP_STAGE_PROBLEM if the problem file was successfully read
 */
extern
SCIP_RETCODE SCIPreadProb(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           filename,           /**< problem file name */
   const char*           extension           /**< extension of the desired file reader,
                                              *   or NULL if file extension should be used */
   );

/** writes original problem to file
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_RETCODE SCIPwriteOrigProblem(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           filename,           /**< output file (or NULL for standard output) */
   const char*           extension,          /**< extension of the desired file reader,
                                              *   or NULL if file extension should be used */
   SCIP_Bool             genericnames        /**< use generic variable and constraint names? */
   );

/** writes transformed problem which are valid in the current node to file
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @note If you want the write all constraints (including the once which are redundant for example), you need to set
 *        the parameter <write/allconss> to TRUE
 */
extern
SCIP_RETCODE SCIPwriteTransProblem(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           filename,           /**< output file (or NULL for standard output) */
   const char*           extension,          /**< extension of the desired file reader,
                                              *   or NULL if file extension should be used */
   SCIP_Bool             genericnames        /**< using generic variable and constraint names? */
   );

/** frees problem and solution process data
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_INIT
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_FREE
 *
 *  @post After this method was called, SCIP is in the following stage:
 *       - \ref SCIP_STAGE_INIT
 */
extern
SCIP_RETCODE SCIPfreeProb(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** permutes parts of the problem data structure
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 */
extern
SCIP_RETCODE SCIPpermuteProb(
   SCIP*                 scip,               /**< SCIP data structure */
   unsigned int          randseed,           /**< seed value for random generator */
   SCIP_Bool             permuteconss,       /**< should the list of constraints in each constraint handler be permuted? */
   SCIP_Bool             permutebinvars,     /**< should the list of binary variables be permuted? */
   SCIP_Bool             permuteintvars,     /**< should the list of integer variables be permuted? */
   SCIP_Bool             permuteimplvars,    /**< should the list of implicit integer variables be permuted? */
   SCIP_Bool             permutecontvars     /**< should the list of continuous integer variables be permuted? */
   );

/** gets user problem data
 *
 *  @return a SCIP_PROBDATA pointer, or NULL if no problem data was allocated
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_PROBDATA* SCIPgetProbData(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets user problem data
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_RETCODE SCIPsetProbData(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROBDATA*        probdata            /**< user problem data to use */
   );

/** returns name of the current problem instance
 *
 *  @return name of the current problem instance
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
const char* SCIPgetProbName(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets name of the current problem instance
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_RETCODE SCIPsetProbName(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name to be set */
   );

/** returns objective sense of original problem
 *
 *  @return objective sense of original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_OBJSENSE SCIPgetObjsense(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets objective sense of problem
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPsetObjsense(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_OBJSENSE         objsense            /**< new objective sense */
   );

/** adds offset of objective function
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PRESOLVING
 */
extern
SCIP_RETCODE SCIPaddObjoffset(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_Real             addval              /**< value to add to objective offset */
   );

/** adds offset of objective function to original problem and to all existing solution in original space
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 */
extern
SCIP_RETCODE SCIPaddOrigObjoffset(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_Real             addval              /**< value to add to objective offset */
   );

/** returns the objective offset of the original problem
 *
 *  @return the objective offset of the original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
SCIP_Real SCIPgetOrigObjoffset(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the objective scale of the original problem
 *
 *  @return the objective scale of the original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
SCIP_Real SCIPgetOrigObjscale(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the objective offset of the transformed problem
 *
 *  @return the objective offset of the transformed problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
SCIP_Real SCIPgetTransObjoffset(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the objective scale of the transformed problem
 *
 *  @return the objective scale of the transformed problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
SCIP_Real SCIPgetTransObjscale(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** sets limit on objective function, such that only solutions better than this limit are accepted
 *
 *  @note SCIP will only look for solutions with a strictly better objective value, thus, e.g., prune
 *        all branch-and-bound nodes with dual bound equal or worse to the objective limit.
 *        However, SCIP will also collect solutions with objective value worse than the objective limit and
 *        use them to run improvement heuristics on them.
 *  @note If SCIP can prove that there exists no solution with a strictly better objective value, the solving status
 *        will normally be infeasible (the objective limit is interpreted as part of the problem).
 *        The only exception is that by chance, SCIP found a solution with the same objective value and thus
 *        proved the optimality of this solution, resulting in solution status optimal.
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 */
extern
SCIP_RETCODE SCIPsetObjlimit(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_Real             objlimit            /**< new primal objective limit */
   );

/** returns current limit on objective function
 *
 *  @return the current objective limit of the original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
SCIP_Real SCIPgetObjlimit(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** informs SCIP, that the objective value is always integral in every feasible solution
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. otherwise a suitable error code is passed. see \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_SOLVING
 */
extern
SCIP_RETCODE SCIPsetObjIntegral(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns whether the objective value is known to be integral in every feasible solution
 *
 *  @return TRUE, if objective value is known to be always integral, otherwise FALSE
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 */
extern
SCIP_Bool SCIPisObjIntegral(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** returns the Euclidean norm of the objective function vector (available only for transformed problem)
 *
 *  @return the Euclidean norm of the transformed objective function vector
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
SCIP_Real SCIPgetObjNorm(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** adds variable to the problem
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 */
extern
SCIP_RETCODE SCIPaddVar(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_VAR*             var                 /**< variable to add */
   );

/** adds variable to the problem and uses it as pricing candidate to enter the LP
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can only be called if @p scip is in stage \ref SCIP_STAGE_SOLVING
 */
extern
SCIP_RETCODE SCIPaddPricedVar(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_VAR*             var,                /**< variable to add */
   SCIP_Real             score               /**< pricing score of variable (the larger, the better the variable) */
   );

/** removes variable from the problem
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_RETCODE SCIPdelVar(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_VAR*             var,                /**< variable to delete */
   SCIP_Bool*            deleted             /**< pointer to store whether variable was successfully marked to be deleted */
   );

/** gets variables of the problem along with the numbers of different variable types; data may become invalid after
 *  calls to SCIPchgVarType(), SCIPfixVar(), SCIPaggregateVars(), and SCIPmultiaggregateVar()
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @note Variables in the vars array are ordered: binaries first, then integers, implicit integers and continuous last.
 */
extern
SCIP_RETCODE SCIPgetVarsData(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_VAR***           vars,               /**< pointer to store variables array or NULL if not needed */
   int*                  nvars,              /**< pointer to store number of variables or NULL if not needed */
   int*                  nbinvars,           /**< pointer to store number of binary variables or NULL if not needed */
   int*                  nintvars,           /**< pointer to store number of integer variables or NULL if not needed */
   int*                  nimplvars,          /**< pointer to store number of implicit integral vars or NULL if not needed */
   int*                  ncontvars           /**< pointer to store number of continuous variables or NULL if not needed */
   );

/** gets array with active problem variables
 *
 *  @return array with active problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *
 *  @warning If your are using the methods which add or change bound of variables (e.g., SCIPchgVarType(), SCIPfixVar(),
 *           SCIPaggregateVars(), and SCIPmultiaggregateVar()), it can happen that the internal variable array (which is
 *           accessed via this method) gets resized and/or resorted. This can invalid the data pointer which is returned
 *           by this method.
 *
 *  @note Variables in the array are ordered: binaries first, then integers, implicit integers and continuous last.
 */
extern
SCIP_VAR** SCIPgetVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of active problem variables
 *
 *  @return the number of active problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
int SCIPgetNVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of binary active problem variables
 *
 *  @return the number of binary active problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
int SCIPgetNBinVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of integer active problem variables
 *
 *  @return the number of integer active problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
int SCIPgetNIntVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of implicit integer active problem variables
 *
 *  @return the number of implicit integer active problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
int SCIPgetNImplVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of continuous active problem variables
 *
 *  @return the number of continuous active problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
int SCIPgetNContVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of active problem variables with a non-zero objective coefficient
 *
 *  @note In case of the original problem the number of variables is counted. In case of the transformed problem the
 *        number of variables is just returned since it is stored internally
 *
 *  @return the number of active problem variables with a non-zero objective coefficient
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
int SCIPgetNObjVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets array with fixed and aggregated problem variables; data may become invalid after
 *  calls to SCIPfixVar(), SCIPaggregateVars(), and SCIPmultiaggregateVar()
 *
 *  @return an array with fixed and aggregated problem variables; data may become invalid after
 *          calls to SCIPfixVar(), SCIPaggregateVars(), and SCIPmultiaggregateVar()
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
SCIP_VAR** SCIPgetFixedVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of fixed or aggregated problem variables
 *
 *  @return the number of fixed or aggregated problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
int SCIPgetNFixedVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets variables of the original problem along with the numbers of different variable types; data may become invalid
 *  after a call to SCIPchgVarType()
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_RETCODE SCIPgetOrigVarsData(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_VAR***           vars,               /**< pointer to store variables array or NULL if not needed */
   int*                  nvars,              /**< pointer to store number of variables or NULL if not needed */
   int*                  nbinvars,           /**< pointer to store number of binary variables or NULL if not needed */
   int*                  nintvars,           /**< pointer to store number of integer variables or NULL if not needed */
   int*                  nimplvars,          /**< pointer to store number of implicit integral vars or NULL if not needed */
   int*                  ncontvars           /**< pointer to store number of continuous variables or NULL if not needed */
   );

/** gets array with original problem variables; data may become invalid after
 *  a call to SCIPchgVarType()
 *
 *  @return an array with original problem variables; data may become invalid after
 *          a call to SCIPchgVarType()
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_VAR** SCIPgetOrigVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of original problem variables
 *
 *  @return the number of original problem variables
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
int SCIPgetNOrigVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of binary variables in the original problem
 *
 *  @return the number of binary variables in the original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
int SCIPgetNOrigBinVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets the number of integer variables in the original problem
 *
 *  @return the number of integer variables in the original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
int SCIPgetNOrigIntVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of implicit integer variables in the original problem
 *
 *  @return the number of implicit integer variables in the original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
int SCIPgetNOrigImplVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of continuous variables in the original problem
 *
 *  @return the number of continuous variables in the original problem
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
int SCIPgetNOrigContVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets number of all problem variables created during creation and solving of problem;
 *  this includes also variables that were deleted in the meantime
 *
 *  @return the number of all problem variables created during creation and solving of problem;
 *          this includes also variables that were deleted in the meantime
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
int SCIPgetNTotalVars(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** gets variables of the original or transformed problem along with the numbers of different variable types;
 *  the returned problem space (original or transformed) corresponds to the given solution;
 *  data may become invalid after calls to SCIPchgVarType(), SCIPfixVar(), SCIPaggregateVars(), and
 *  SCIPmultiaggregateVar()
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 */
extern
SCIP_RETCODE SCIPgetSolVarsData(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_SOL*             sol,                /**< primal solution that selects the problem space, NULL for current solution */
   SCIP_VAR***           vars,               /**< pointer to store variables array or NULL if not needed */
   int*                  nvars,              /**< pointer to store number of variables or NULL if not needed */
   int*                  nbinvars,           /**< pointer to store number of binary variables or NULL if not needed */
   int*                  nintvars,           /**< pointer to store number of integer variables or NULL if not needed */
   int*                  nimplvars,          /**< pointer to store number of implicit integral vars or NULL if not needed */
   int*                  ncontvars           /**< pointer to store number of continuous variables or NULL if not needed */
   );

/** returns variable of given name in the problem, or NULL if not existing
 *
 *  @return variable of given name in the problem, or NULL if not existing
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_VAR* SCIPfindVar(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of variable to find */
   );

/** returns TRUE iff all potential variables exist in the problem, and FALSE, if there may be additional variables,
 *  that will be added in pricing and improve the objective value
 *
 *  @return TRUE, if all potential variables exist in the problem; FALSE, otherwise
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_Bool SCIPallVarsInProb(
   SCIP*                 scip                /**< SCIP data structure */
   );

/** adds constraint to the problem; if constraint is only valid locally, it is added to the local subproblem of the
 *  current node (and all of its subnodes); otherwise it is added to the global problem;
 *  if a local constraint is added at the root node, it is automatically upgraded into a global constraint
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_EXITSOLVE
 */
extern
SCIP_RETCODE SCIPaddCons(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONS*            cons                /**< constraint to add */
   );

/** globally removes constraint from all subproblems; removes constraint from the constraint set change data of the
 *  node, where it was added, or from the problem, if it was a problem constraint
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 */
extern
SCIP_RETCODE SCIPdelCons(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONS*            cons                /**< constraint to delete */
   );

/** returns original constraint of given name in the problem, or NULL if not existing
 *
 *  @return original constraint of given name in the problem, or NULL if not existing
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS */
extern
SCIP_CONS* SCIPfindOrigCons(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of constraint to find */
   );

/** returns constraint of given name in the problem, or NULL if not existing
 *
 *  @return constraint of given name in the problem, or NULL if not existing
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMING
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_INITSOLVE
 *       - \ref SCIP_STAGE_SOLVING
 *       - \ref SCIP_STAGE_SOLVED
 *       - \ref SCIP_STAGE_EXITSOLVE
 *       - \ref SCIP_STAGE_FREETRANS
 */
extern
SCIP_CONS* SCIPfindCons(
   SCIP*                 scip,               /**< SCIP data structure */
   const char*           name                /**< name of constraint to find */
   );

/** gets number of upgraded constraints
 *
 *  @return number of upgraded constraints
 *
 *  @pre This method can be called if @p scip is in one of the following stages:
 *       - \ref SCIP_STAGE_PROBLEM
 *       - \ref SCIP_STAGE_TRANSFORMED
 *       - \ref SCIP_STAGE_INITPRESOLVE
 *       - \ref SCIP_STAGE_PRESOLVING
 *       - \ref SCIP_STAGE_PRESOLVED
 *       - \ref SCIP_STAGE_EXITPRESOLVE
 *       - \ref SCIP_STAGE_SOLVING