conflict_general.h

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/*         SCIP --- Solving Constraint Integer Programs                      */
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/**@file   conflict_general.h
 * @ingroup OTHER_CFILES
 * @brief  methods and datastructures for conflict analysis
 * @author Tobias Achterberg
 * @author Timo Berthold
 * @author Stefan Heinz
 * @author Marc Pfetsch
 * @author Michael Winkler
 * @author Jakob Witzig
 *
 * SCIP contains two kinds of conflict analysis:
 *    - In graph based conflict analysis, the graph consisting of derived
 *      is analysed. Code and documentation is available in conflict_graphanalysis.h
 *    - In dual proof analysis, an infeasible LP relaxation is analysed.
 *      Using the dual solution, a valid constraint is derived that is violated
 *      by all values in the domain. This constraint is added to the problem
 *      and can then be used for domain propagation.
 *      Code is available in conflict_dualproofanalysis.h
 * This file contains the methods that are shared by both kinds of conflict analysis.
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_CONFLICT_GENERAL_H__
#define __SCIP_CONFLICT_GENERAL_H__
 
 
#include "blockmemshell/memory.h"
#include "scip/def.h"
#include "scip/type_branch.h"
#include "scip/type_conflict.h"
#include "scip/type_conflictstore.h"
#include "scip/type_event.h"
#include "scip/type_cuts.h"
#include "lpi/type_lpi.h"
#include "scip/type_implics.h"
#include "scip/type_lp.h"
#include "scip/type_prob.h"
#include "scip/type_reopt.h"
#include "scip/type_retcode.h"
#include "scip/type_set.h"
#include "scip/type_stat.h"
#include "scip/type_tree.h"
#include "scip/type_var.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*
 * Conflict Analysis
 */
 
/** creates conflict analysis data for propagation conflicts */
SCIP_RETCODE SCIPconflictCreate(
   SCIP_CONFLICT**       conflict,           /**< pointer to conflict analysis data */
   BMS_BLKMEM*           blkmem,             /**< block memory of transformed problem */
   SCIP_SET*             set                 /**< global SCIP settings */
   );
 
/** frees conflict analysis data for propagation conflicts */
SCIP_RETCODE SCIPconflictFree(
   SCIP_CONFLICT**       conflict,           /**< pointer to conflict analysis data */
   BMS_BLKMEM*           blkmem              /**< block memory of transformed problem */
   );
 
/** analyzes conflicting bound changes that were added with calls to SCIPconflictAddBound() and
 *  SCIPconflictAddRelaxedBound(), and on success, calls the conflict handlers to create a conflict constraint out of
 *  the resulting conflict set; updates statistics for propagation conflict analysis
 */
SCIP_RETCODE SCIPconflictAnalyze(
   SCIP_CONFLICT*        conflict,           /**< conflict analysis data */
   BMS_BLKMEM*           blkmem,             /**< block memory of transformed problem */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< problem statistics */
   SCIP_PROB*            prob,               /**< problem data */
   SCIP_TREE*            tree,               /**< branch and bound tree */
   int                   validdepth,         /**< minimal depth level at which the initial conflict set is valid */
   SCIP_Bool*            success             /**< pointer to store whether a conflict constraint was created, or NULL */
   );
 
/** adds the collected conflict constraints to the corresponding nodes; the best set->conf_maxconss conflict constraints
 *  are added to the node of their validdepth; additionally (if not yet added, and if repropagation is activated), the
 *  conflict constraint that triggers the earliest repropagation is added to the node of its validdepth
 */
SCIP_RETCODE SCIPconflictFlushConss(
   SCIP_CONFLICT*        conflict,           /**< conflict analysis data */
   BMS_BLKMEM*           blkmem,             /**< block memory of transformed problem */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< dynamic problem statistics */
   SCIP_PROB*            transprob,          /**< transformed problem */
   SCIP_PROB*            origprob,           /**< original problem */
   SCIP_TREE*            tree,               /**< branch and bound tree */
   SCIP_REOPT*           reopt,              /**< reoptimization data structure */
   SCIP_LP*              lp,                 /**< current LP data */
   SCIP_BRANCHCAND*      branchcand,         /**< branching candidate storage */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_CLIQUETABLE*     cliquetable         /**< clique table data structure */
   );
 
/** returns the current number of conflict sets in the conflict set storage */
int SCIPconflictGetNConflicts(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of conflict constraints that were added to the problem */
SCIP_Longint SCIPconflictGetNAppliedConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of literals in conflict constraints that were added to the problem */
SCIP_Longint SCIPconflictGetNAppliedLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of global bound changes applied by the conflict analysis */
SCIP_Longint SCIPconflictGetNGlobalChgBds(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of conflict constraints that were added globally to the problem */
SCIP_Longint SCIPconflictGetNAppliedGlobalConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of literals in conflict constraints that were added globally to the problem */
SCIP_Longint SCIPconflictGetNAppliedGlobalLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of local bound changes applied by the conflict analysis */
SCIP_Longint SCIPconflictGetNLocalChgBds(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of conflict constraints that were added locally to the problem */
SCIP_Longint SCIPconflictGetNAppliedLocalConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** returns the total number of literals in conflict constraints that were added locally to the problem */
SCIP_Longint SCIPconflictGetNAppliedLocalLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets time in seconds used for preprocessing global conflict constraint before appliance */
SCIP_Real SCIPconflictGetGlobalApplTime(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets time in seconds used for analyzing propagation conflicts */
SCIP_Real SCIPconflictGetPropTime(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to propagation conflict analysis */
SCIP_Longint SCIPconflictGetNPropCalls(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to propagation conflict analysis that yield at least one conflict constraint */
SCIP_Longint SCIPconflictGetNPropSuccess(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of conflict constraints detected in propagation conflict analysis */
SCIP_Longint SCIPconflictGetNPropConflictConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in conflict constraints created in propagation conflict analysis */
SCIP_Longint SCIPconflictGetNPropConflictLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of reconvergence constraints detected in propagation conflict analysis */
SCIP_Longint SCIPconflictGetNPropReconvergenceConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in reconvergence constraints created in propagation conflict analysis */
SCIP_Longint SCIPconflictGetNPropReconvergenceLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/*
 * Infeasible LP Conflict Analysis
 */
 
/** analyzes an infeasible or bound exceeding LP to find out the bound changes on variables that were responsible for the
 *  infeasibility or for exceeding the primal bound;
 *  on success, calls standard conflict analysis with the responsible variables as starting conflict set, thus creating
 *  a conflict constraint out of the resulting conflict set;
 *  updates statistics for infeasible or bound exceeding LP conflict analysis
 */
SCIP_RETCODE SCIPconflictAnalyzeLP(
   SCIP_CONFLICT*        conflict,           /**< conflict analysis data */
   SCIP_CONFLICTSTORE*   conflictstore,      /**< conflict store */
   BMS_BLKMEM*           blkmem,             /**< block memory of transformed problem */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< problem statistics */
   SCIP_PROB*            transprob,          /**< transformed problem */
   SCIP_PROB*            origprob,           /**< original problem */
   SCIP_TREE*            tree,               /**< branch and bound tree */
   SCIP_REOPT*           reopt,              /**< reoptimization data structure */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_BRANCHCAND*      branchcand,         /**< branching candidate storage */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_CLIQUETABLE*     cliquetable,        /**< clique table data structure */
   SCIP_Bool*            success             /**< pointer to store whether a conflict constraint was created, or NULL */
   );
 
/** gets time in seconds used for analyzing infeasible LP conflicts */
SCIP_Real SCIPconflictGetInfeasibleLPTime(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to infeasible LP conflict analysis */
SCIP_Longint SCIPconflictGetNInfeasibleLPCalls(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to infeasible LP conflict analysis that yield at least one conflict constraint */
SCIP_Longint SCIPconflictGetNInfeasibleLPSuccess(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of conflict constraints detected in infeasible LP conflict analysis */
SCIP_Longint SCIPconflictGetNInfeasibleLPConflictConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in conflict constraints created in infeasible LP conflict analysis */
SCIP_Longint SCIPconflictGetNInfeasibleLPConflictLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of reconvergence constraints detected in infeasible LP conflict analysis */
SCIP_Longint SCIPconflictGetNInfeasibleLPReconvergenceConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in reconvergence constraints created in infeasible LP conflict analysis */
SCIP_Longint SCIPconflictGetNInfeasibleLPReconvergenceLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of LP iterations in infeasible LP conflict analysis */
SCIP_Longint SCIPconflictGetNInfeasibleLPIterations(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets time in seconds used for analyzing bound exceeding LP conflicts */
SCIP_Real SCIPconflictGetBoundexceedingLPTime(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to bound exceeding LP conflict analysis */
SCIP_Longint SCIPconflictGetNBoundexceedingLPCalls(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to bound exceeding LP conflict analysis that yield at least one conflict constraint */
SCIP_Longint SCIPconflictGetNBoundexceedingLPSuccess(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of conflict constraints detected in bound exceeding LP conflict analysis */
SCIP_Longint SCIPconflictGetNBoundexceedingLPConflictConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in conflict constraints created in bound exceeding LP conflict analysis */
SCIP_Longint SCIPconflictGetNBoundexceedingLPConflictLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of reconvergence constraints detected in bound exceeding LP conflict analysis */
SCIP_Longint SCIPconflictGetNBoundexceedingLPReconvergenceConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in reconvergence constraints created in bound exceeding LP conflict analysis */
SCIP_Longint SCIPconflictGetNBoundexceedingLPReconvergenceLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of LP iterations in bound exceeding LP conflict analysis */
SCIP_Longint SCIPconflictGetNBoundexceedingLPIterations(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
 
 
 
/*
 * infeasible strong branching conflict analysis
 */
 
/** analyses infeasible strong branching sub problems for conflicts */
SCIP_RETCODE SCIPconflictAnalyzeStrongbranch(
   SCIP_CONFLICT*        conflict,           /**< conflict analysis data */
   SCIP_CONFLICTSTORE*   conflictstore,      /**< conflict store */
   BMS_BLKMEM*           blkmem,             /**< block memory buffers */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< dynamic problem statistics */
   SCIP_PROB*            transprob,          /**< transformed problem */
   SCIP_PROB*            origprob,           /**< original problem */
   SCIP_TREE*            tree,               /**< branch and bound tree */
   SCIP_REOPT*           reopt,              /**< reoptimization data structure */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_BRANCHCAND*      branchcand,         /**< branching candidate storage */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_CLIQUETABLE*     cliquetable,        /**< clique table data structure */
   SCIP_COL*             col,                /**< LP column with at least one infeasible strong branching subproblem */
   SCIP_Bool*            downconflict,       /**< pointer to store whether a conflict constraint was created for an
                                              *   infeasible downwards branch, or NULL */
   SCIP_Bool*            upconflict          /**< pointer to store whether a conflict constraint was created for an
                                              *   infeasible upwards branch, or NULL */
   );
 
/** gets time in seconds used for analyzing infeasible strong branching conflicts */
SCIP_Real SCIPconflictGetStrongbranchTime(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of successful calls to dual proof analysis derived from infeasible LPs */
SCIP_Longint SCIPconflictGetNDualproofsInfSuccess(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of globally valid dual proof constraints derived from infeasible LPs */
SCIP_Longint SCIPconflictGetNDualproofsInfGlobal(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of locally valid dual proof constraints derived from infeasible LPs */
SCIP_Longint SCIPconflictGetNDualproofsInfLocal(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets average length of dual proof constraints derived from infeasible LPs */
SCIP_Longint SCIPconflictGetNDualproofsInfNonzeros(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of successfully analyzed dual proofs derived from bound exceeding LPs */
SCIP_Longint SCIPconflictGetNDualproofsBndSuccess(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of globally applied dual proofs derived from bound exceeding LPs */
SCIP_Longint SCIPconflictGetNDualproofsBndGlobal(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of locally applied dual proofs derived from bound exceeding LPs */
SCIP_Longint SCIPconflictGetNDualproofsBndLocal(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets average length of dual proofs derived from bound exceeding LPs */
SCIP_Longint SCIPconflictGetNDualproofsBndNonzeros(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to infeasible strong branching conflict analysis */
SCIP_Longint SCIPconflictGetNStrongbranchCalls(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to infeasible strong branching conflict analysis that yield at least one conflict constraint */
SCIP_Longint SCIPconflictGetNStrongbranchSuccess(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of conflict constraints detected in infeasible strong branching conflict analysis */
SCIP_Longint SCIPconflictGetNStrongbranchConflictConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in conflict constraints created in infeasible strong branching conflict analysis */
SCIP_Longint SCIPconflictGetNStrongbranchConflictLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of reconvergence constraints detected in infeasible strong branching conflict analysis */
SCIP_Longint SCIPconflictGetNStrongbranchReconvergenceConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in reconvergence constraints created in infeasible strong branching conflict analysis */
SCIP_Longint SCIPconflictGetNStrongbranchReconvergenceLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of LP iterations in infeasible strong branching conflict analysis */
SCIP_Longint SCIPconflictGetNStrongbranchIterations(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
 
 
 
/*
 * pseudo solution conflict analysis
 */
 
/** analyzes a pseudo solution with objective value exceeding the current cutoff to find out the bound changes on
 *  variables that were responsible for the objective value degradation;
 *  on success, calls standard conflict analysis with the responsible variables as starting conflict set, thus creating
 *  a conflict constraint out of the resulting conflict set;
 *  updates statistics for pseudo solution conflict analysis
 */
SCIP_RETCODE SCIPconflictAnalyzePseudo(
   SCIP_CONFLICT*        conflict,           /**< conflict analysis data */
   BMS_BLKMEM*           blkmem,             /**< block memory of transformed problem */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< problem statistics */
   SCIP_PROB*            transprob,          /**< transformed problem */
   SCIP_PROB*            origprob,           /**< original problem */
   SCIP_TREE*            tree,               /**< branch and bound tree */
   SCIP_REOPT*           reopt,              /**< reoptimization data structure */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_BRANCHCAND*      branchcand,         /**< branching candidate storage */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_CLIQUETABLE*     cliquetable,        /**< clique table data structure */
   SCIP_Bool*            success             /**< pointer to store whether a conflict constraint was created, or NULL */
   );
 
/** gets time in seconds used for analyzing pseudo solution conflicts */
SCIP_Real SCIPconflictGetPseudoTime(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to pseudo solution conflict analysis */
SCIP_Longint SCIPconflictGetNPseudoCalls(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of calls to pseudo solution conflict analysis that yield at least one conflict constraint */
SCIP_Longint SCIPconflictGetNPseudoSuccess(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of conflict constraints detected in pseudo solution conflict analysis */
SCIP_Longint SCIPconflictGetNPseudoConflictConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in conflict constraints created in pseudo solution conflict analysis */
SCIP_Longint SCIPconflictGetNPseudoConflictLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets number of reconvergence constraints detected in pseudo solution conflict analysis */
SCIP_Longint SCIPconflictGetNPseudoReconvergenceConss(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** gets total number of literals in reconvergence constraints created in pseudo solution conflict analysis */
SCIP_Longint SCIPconflictGetNPseudoReconvergenceLiterals(
   SCIP_CONFLICT*        conflict            /**< conflict analysis data */
   );
 
/** enables or disables all clocks of \p conflict, depending on the value of the flag */
void SCIPconflictEnableOrDisableClocks(
   SCIP_CONFLICT*        conflict,           /**< the conflict analysis data for which all clocks should be enabled or disabled */
   SCIP_Bool             enable              /**< should the clocks of the conflict analysis data be enabled? */
   );
 
/** analyzes conflicting bound changes that were added with calls to SCIPconflictAddBound() and
 *  SCIPconflictAddRelaxedBound(), and on success, calls the conflict handlers to create a conflict constraint out of
 *  the resulting conflict set; afterwards the conflict queue and the conflict set is cleared
 */
SCIP_RETCODE conflictAnalyze(
   SCIP_CONFLICT*        conflict,           /**< conflict analysis data */
   BMS_BLKMEM*           blkmem,             /**< block memory of transformed problem */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< problem statistics */
   SCIP_PROB*            prob,               /**< problem data */
   SCIP_TREE*            tree,               /**< branch and bound tree */
   SCIP_Bool             diving,             /**< are we in strong branching or diving mode? */
   int                   validdepth,         /**< minimal depth level at which the initial conflict set is valid */
   SCIP_Bool             mustresolve,        /**< should the conflict set only be used, if a resolution was applied? */
   int*                  nconss,             /**< pointer to store the number of generated conflict constraints */
   int*                  nliterals,          /**< pointer to store the number of literals in generated conflict constraints */
   int*                  nreconvconss,       /**< pointer to store the number of generated reconvergence constraints */
   int*                  nreconvliterals     /**< pointer to store the number of literals generated reconvergence constraints */
   );
 
/** calculates a Farkas proof from the current dual LP solution */
SCIP_RETCODE SCIPgetFarkasProof(
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_PROB*            prob,               /**< transformed problem */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_LPI*             lpi,                /**< LPI data */
   SCIP_TREE*            tree,               /**< tree data */
   SCIP_AGGRROW*         farkasrow,          /**< aggregated row representing the proof */
   SCIP_Real*            farkasact,          /**< maximal activity of the proof constraint */
   int*                  validdepth,         /**< pointer to store the valid depth of the proof constraint */
   SCIP_Real*            curvarlbs,          /**< current lower bounds of active problem variables */
   SCIP_Real*            curvarubs,          /**< current upper bounds of active problem variables */
   SCIP_Bool*            valid               /**< pointer store whether the proof constraint is valid */
   );
 
/** calculates a dual proof from the current dual LP solution */
SCIP_RETCODE SCIPgetDualProof(
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_PROB*            transprob,          /**< transformed problem */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_LPI*             lpi,                /**< LPI data */
   SCIP_TREE*            tree,               /**< tree data */
   SCIP_AGGRROW*         farkasrow,          /**< aggregated row representing the proof */
   SCIP_Real*            farkasact,          /**< maximal activity of the proof constraint */
   int*                  validdepth,         /**< pointer to store the valid depth of the proof constraint */
   SCIP_Real*            curvarlbs,          /**< current lower bounds of active problem variables */
   SCIP_Real*            curvarubs,          /**< current upper bounds of active problem variables */
   SCIP_Bool*            valid               /**< pointer store whether the proof constraint is valid */
   );
 
/** calculates the minimal activity of a given aggregation row */
SCIP_Real SCIPaggrRowGetMinActivity(
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_PROB*            transprob,          /**< transformed problem data */
   SCIP_AGGRROW*         aggrrow,            /**< aggregation row */
   SCIP_Real*            curvarlbs,          /**< current lower bounds of active problem variables (or NULL for global bounds) */
   SCIP_Real*            curvarubs,          /**< current upper bounds of active problem variables (or NULL for global bounds) */
   SCIP_Bool*            infdelta            /**< pointer to store whether at least one variable contributes with an infinite value */
   );
#ifdef __cplusplus
}
#endif
 
#endif