cons_countsols.c File Reference

Detailed Description

constraint handler for counting feasible solutions

Author

Stefan Heinz

Michael Winkler

If this constraint handler is activated than it counts or collects all feasible solutions. We refer to How to use SCIP to count/enumerate feasible solutions for more details about using SCIP for counting feasible solutions.

Definition in file cons_countsols.c.

#include <string.h>
#include "scip/cons_and.h"
#include "scip/cons_knapsack.h"
#include "scip/cons_bounddisjunction.h"
#include "scip/cons_logicor.h"
#include "scip/cons_setppc.h"
#include "scip/cons_varbound.h"
#include "scip/cons_countsols.h"
#include "scip/dialog_default.h"

Go to the source code of this file.

Macros
#define	CONSHDLR_NAME   "countsols"
#define	CONSHDLR_DESC   "constraint to count feasible solutions"
#define	CONSHDLR_ENFOPRIORITY   -9999999
#define	CONSHDLR_CHECKPRIORITY   -9999999
#define	CONSHDLR_EAGERFREQ   100
#define	CONSHDLR_NEEDSCONS   FALSE
#define	DEFAULT_SPARSETEST   TRUE
#define	DEFAULT_DISCARDSOLS   TRUE
#define	DEFAULT_ACTIVE   FALSE
#define	DEFAULT_COLLECT   FALSE
#define	DEFAULT_SOLLIMIT   -1LL
#define	DISP_SOLS_NAME   "sols"
#define	DISP_SOLS_DESC   "number of detected feasible solutions"
#define	DISP_SOLS_HEADER   " sols "
#define	DISP_SOLS_WIDTH   7
#define	DISP_SOLS_PRIORITY   110000
#define	DISP_SOLS_POSITION   100000
#define	DISP_SOLS_STRIPLINE   TRUE
#define	DISP_CUTS_NAME   "feasST"
#define	DISP_CUTS_DESC   "number of detected non trivial feasible subtrees"
#define	DISP_CUTS_HEADER   "feasST"
#define	DISP_CUTS_WIDTH   6
#define	DISP_CUTS_PRIORITY   110000
#define	DISP_CUTS_POSITION   110000
#define	DISP_CUTS_STRIPLINE   TRUE
#define	CUTOFF_CONSTRAINT(x)   SCIP_RETCODE x (SCIP* scip, SCIP_SOL* sol, SCIP_CONSHDLRDATA* conshdlrdata)
#define	consCopyCountsols   NULL

Typedefs
typedef SCIP_Longint	Int

Functions
static void	allocInt (Int *value)
static void	setInt (Int *value, SCIP_Longint newvalue)
static void	setPowerOfTwo (Int *value, SCIP_Longint exponent)
static void	freeInt (Int *value)
static void	addOne (Int *value)
static void	addInt (Int *value, Int *summand)
static void	multInt (Int *value, SCIP_Longint factor)
static void	toString (Int value, char **buffer, int buffersize)
static SCIP_Longint	getNCountedSols (Int value, SCIP_Bool *valid)
static SCIP_Bool	varIsUnfixedLocal (SCIP_VAR *var)
static SCIP_RETCODE	conshdlrdataCreate (SCIP *scip, SCIP_CONSHDLRDATA **conshdlrdata)
static void	checkSolutionOrig (SCIP *scip, SCIP_SOL *sol, SCIP_CONSHDLRDATA *conshdlrdata)
static SCIP_RETCODE	checkParameters (SCIP *scip)
static	CUTOFF_CONSTRAINT (addBinaryCons)
static	CUTOFF_CONSTRAINT (addIntegerCons)
static SCIP_RETCODE	collectSolution (SCIP *scip, SCIP_CONSHDLRDATA *conshdlrdata, SCIP_SOL *sol)
static SCIP_RETCODE	countSparseSol (SCIP *scip, SCIP_SOL *sol, SCIP_Bool feasible, SCIP_CONSHDLRDATA *conshdlrdata, SCIP_RESULT *result)
static SCIP_RETCODE	checkLogicor (SCIP *scip, SCIP_CONSHDLR *conshdlr, int nconss, SCIP_Bool *satisfied)
static SCIP_RETCODE	checkKnapsack (SCIP *scip, SCIP_CONSHDLR *conshdlr, int nconss, SCIP_Bool *satisfied)
static SCIP_RETCODE	checkBounddisjunction (SCIP *scip, SCIP_CONSHDLR *conshdlr, int nconss, SCIP_Bool *satisfied)
static SCIP_RETCODE	checkVarbound (SCIP *scip, SCIP_CONSHDLR *conshdlr, int nconss, SCIP_Bool *satisfied)
static SCIP_RETCODE	checkFeasSubtree (SCIP *scip, SCIP_SOL *sol, SCIP_Bool *feasible)
static SCIP_RETCODE	checkSolution (SCIP *scip, SCIP_SOL *sol, SCIP_CONSHDLRDATA *conshdlrdata, SCIP_RESULT *result)
static SCIP_RETCODE	includeConshdlrCountsols (SCIP *scip, SCIP_Bool dialogs)
static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyCountsols)
static	SCIP_DECL_CONSFREE (consFreeCountsols)
static	SCIP_DECL_CONSINIT (consInitCountsols)
static	SCIP_DECL_CONSEXIT (consExitCountsols)
static	SCIP_DECL_CONSINITSOL (consInitsolCountsols)
static	SCIP_DECL_CONSEXITSOL (consExitsolCountsols)
static	SCIP_DECL_CONSENFOLP (consEnfolpCountsols)
static	SCIP_DECL_CONSENFOPS (consEnfopsCountsols)
static	SCIP_DECL_CONSCHECK (consCheckCountsols)
static	SCIP_DECL_CONSLOCK (consLockCountsols)
	SCIP_DECL_DIALOGEXEC (SCIPdialogExecCountPresolve)
	SCIP_DECL_DIALOGEXEC (SCIPdialogExecCount)
static	SCIP_DECL_SORTPTRCOMP (varCompProbindex)
static SCIP_RETCODE	writeExpandedSolutions (SCIP *scip, FILE *file, SCIP_VAR **allvars, int nallvars, SCIP_VAR **activevars, int nactivevars, SCIP_HASHMAP *hashmap, SCIP_SPARSESOL **sols, int nsols)
	SCIP_DECL_DIALOGEXEC (SCIPdialogExecWriteAllsolutions)
static SCIP_RETCODE	createCountDialog (SCIP *scip)
static	SCIP_DECL_DISPOUTPUT (dispOutputSols)
static	SCIP_DECL_DISPOUTPUT (dispOutputFeasSubtrees)
SCIP_RETCODE	SCIPincludeConshdlrCountsols (SCIP *scip)
SCIP_RETCODE	SCIPcount (SCIP *scip)
SCIP_Longint	SCIPgetNCountedSols (SCIP *scip, SCIP_Bool *valid)
void	SCIPgetNCountedSolsstr (SCIP *scip, char **buffer, int buffersize, int *requiredsize)
SCIP_Longint	SCIPgetNCountedFeasSubtrees (SCIP *scip)
void	SCIPgetCountedSparseSols (SCIP *scip, SCIP_VAR ***vars, int *nvars, SCIP_SPARSESOL ***sols, int *nsols)
SCIP_RETCODE	SCIPsetParamsCountsols (SCIP *scip)

Macro Definition Documentation

#define CONSHDLR_NAME   "countsols"

Definition at line 52 of file cons_countsols.c.

Referenced by checkFeasSubtree(), includeConshdlrCountsols(), SCIP_DECL_CONSEXIT(), SCIP_DECL_CONSEXITSOL(), SCIP_DECL_CONSFREE(), SCIP_DECL_CONSHDLRCOPY(), SCIP_DECL_CONSINIT(), SCIP_DECL_CONSINITSOL(), SCIP_DECL_DIALOGEXEC(), SCIP_DECL_DISPOUTPUT(), SCIPcount(), SCIPgetCountedSparseSols(), SCIPgetNCountedFeasSubtrees(), SCIPgetNCountedSols(), and SCIPgetNCountedSolsstr().

#define CONSHDLR_DESC   "constraint to count feasible solutions"

Definition at line 53 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define CONSHDLR_ENFOPRIORITY   -9999999

priority of the constraint handler for constraint enforcing

Definition at line 54 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define CONSHDLR_CHECKPRIORITY   -9999999

priority of the constraint handler for checking feasibility

Definition at line 55 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define CONSHDLR_EAGERFREQ   100

frequency for using all instead of only the useful constraints in separation, propagation and enforcement, -1 for no eager evaluations, 0 for first only

Definition at line 56 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define CONSHDLR_NEEDSCONS   FALSE

should the constraint handler be skipped, if no constraints are available?

Definition at line 59 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DEFAULT_SPARSETEST   TRUE

sparse test on or off

Definition at line 62 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DEFAULT_DISCARDSOLS   TRUE

is it allowed to discard solutions

Definition at line 63 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DEFAULT_ACTIVE   FALSE

is the constraint handler active

Definition at line 64 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DEFAULT_COLLECT   FALSE

should the solutions be collected

Definition at line 65 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DEFAULT_SOLLIMIT   -1LL

counting stops, if the given number of solutions were found (-1: no limit)

Definition at line 66 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_SOLS_NAME   "sols"

Definition at line 69 of file cons_countsols.c.

Referenced by includeConshdlrCountsols(), and SCIP_DECL_DISPOUTPUT().

#define DISP_SOLS_DESC   "number of detected feasible solutions"

Definition at line 70 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_SOLS_HEADER   " sols "

Definition at line 71 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_SOLS_WIDTH   7

Definition at line 72 of file cons_countsols.c.

Referenced by includeConshdlrCountsols(), and SCIP_DECL_DISPOUTPUT().

#define DISP_SOLS_PRIORITY   110000

Definition at line 73 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_SOLS_POSITION   100000

Definition at line 74 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_SOLS_STRIPLINE   TRUE

Definition at line 75 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_CUTS_NAME   "feasST"

Definition at line 77 of file cons_countsols.c.

Referenced by includeConshdlrCountsols(), and SCIP_DECL_DISPOUTPUT().

#define DISP_CUTS_DESC   "number of detected non trivial feasible subtrees"

Definition at line 78 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_CUTS_HEADER   "feasST"

Definition at line 79 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_CUTS_WIDTH   6

Definition at line 80 of file cons_countsols.c.

Referenced by includeConshdlrCountsols(), and SCIP_DECL_DISPOUTPUT().

#define DISP_CUTS_PRIORITY   110000

Definition at line 81 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_CUTS_POSITION   110000

Definition at line 82 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define DISP_CUTS_STRIPLINE   TRUE

Definition at line 83 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

#define CUTOFF_CONSTRAINT

(

x

)

SCIP_RETCODE x (SCIP* scip, SCIP_SOL* sol, SCIP_CONSHDLRDATA* conshdlrdata)

creates and adds a constraint which cuts off the solution from the feasibility region

input:

• scip : SCIP main data structure
• sol : solution to cut off
• conshdlrdata : constraint handler data

Definition at line 93 of file cons_countsols.c.

Referenced by checkParameters(), and CUTOFF_CONSTRAINT().

#define consCopyCountsols   NULL

Definition at line 1367 of file cons_countsols.c.

Referenced by includeConshdlrCountsols().

Typedef Documentation

typedef SCIP_Longint Int

Definition at line 48 of file cons_countsols.c.

Function Documentation

static void allocInt ( Int *  value )

static

allocates memory for the value pointer

Parameters

value

pointer to the value to allocate memory

Definition at line 134 of file cons_countsols.c.

References setInt().

Referenced by conshdlrdataCreate(), and countSparseSol().

static void setInt ( Int *  value, SCIP_Longint  newvalue  )

static

sets the value pointer to the new value

Parameters

value	pointer to the value to initialize
newvalue	new value

Definition at line 146 of file cons_countsols.c.

References setPowerOfTwo().

Referenced by allocInt(), countSparseSol(), and SCIP_DECL_CONSINIT().

static void setPowerOfTwo ( Int *  value, SCIP_Longint  exponent  )

static

sets a power of 2 to the given value

Parameters

value	pointer to the value to increase
exponent	exponent for the base 2

Definition at line 163 of file cons_countsols.c.

References freeInt(), and SCIP_Longint.

Referenced by countSparseSol(), and setInt().

static void freeInt ( Int *  value )

static

free memory

Parameters

value

pointer to the value to free

Definition at line 181 of file cons_countsols.c.

References addOne().

Referenced by countSparseSol(), SCIP_DECL_CONSFREE(), and setPowerOfTwo().

static void addOne ( Int *  value )

static

adds one to the given value

Parameters

value

pointer to the value to increase

Definition at line 193 of file cons_countsols.c.

References addInt().

Referenced by checkSolution(), countSparseSol(), and freeInt().

static void addInt ( Int *  value, Int *  summand  )

static

adds the summand to the given value

Parameters

value	pointer to the value to increase
summand	summand to add on

Definition at line 207 of file cons_countsols.c.

References multInt().

Referenced by addOne(), and countSparseSol().

static void multInt ( Int *  value, SCIP_Longint  factor  )

static

multiplies the factor by the given value

Parameters

value	pointer to the value to increase
factor	factor to multiply with

Definition at line 222 of file cons_countsols.c.

References toString().

Referenced by addInt(), and countSparseSol().

static void toString ( Int  value, char **  buffer, int  buffersize  )

static

method for creating a string out of an Int which is a mpz_t or SCIP_Longint

Parameters

value	number
buffer	pointer to buffer for storing the string
buffersize	length of the buffer

Definition at line 239 of file cons_countsols.c.

References getNCountedSols(), SCIP_Longint, and SCIPsnprintf().

Referenced by multInt(), and SCIPgetNCountedSolsstr().

static SCIP_Longint getNCountedSols ( Int  value, SCIP_Bool *  valid  )

static

method for creating a SCIP_Longing out of an Int

Parameters

value	number to convert
valid	pointer to store if the return value is valid

Definition at line 255 of file cons_countsols.c.

References FALSE, SCIP_Bool, TRUE, and varIsUnfixedLocal().

Referenced by checkSolution(), SCIPgetNCountedSols(), and toString().

static SCIP_Bool varIsUnfixedLocal ( SCIP_VAR *  var )

static

returns whether a given integer variable is unfixed in the local domain

Parameters

var	integer variable

Definition at line 280 of file cons_countsols.c.

References conshdlrdataCreate(), NULL, SCIP_VARTYPE_CONTINUOUS, SCIPvarGetLbLocal(), SCIPvarGetType(), and SCIPvarGetUbLocal().

Referenced by checkKnapsack(), checkLogicor(), and getNCountedSols().

static SCIP_RETCODE conshdlrdataCreate ( SCIP *  scip, SCIP_CONSHDLRDATA **  conshdlrdata  )

static

creates the constraint handler data

Parameters

scip	SCIP data structure
conshdlrdata	pointer to store constraint handler data

Definition at line 294 of file cons_countsols.c.

References allocInt(), checkSolutionOrig(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, and SCIPallocMemory.

Referenced by includeConshdlrCountsols(), and varIsUnfixedLocal().

static void checkSolutionOrig ( SCIP *  scip, SCIP_SOL *  sol, SCIP_CONSHDLRDATA *  conshdlrdata  )

static

check solution in original space

Parameters

scip	SCIP data structure
sol	solution to add
conshdlrdata	constraint handler data

Definition at line 326 of file cons_countsols.c.

References checkParameters(), FALSE, SCIP_Bool, SCIP_OKAY, SCIPABORT, SCIPcheckSolOrig(), SCIPdebugMessage, SCIPprintError(), and TRUE.

Referenced by checkSolution(), and conshdlrdataCreate().

static SCIP_RETCODE checkParameters ( SCIP *  scip )

static

check if the current parameter setting is correct for a save counting process

Parameters

scip	SCIP data structure

Definition at line 362 of file cons_countsols.c.

References CUTOFF_CONSTRAINT, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_VERBLEVEL_FULL, SCIPgetHeurs(), SCIPgetIntParam(), SCIPgetNHeurs(), SCIPheurGetFreq(), SCIPisParamFixed(), SCIPsetIntParam(), SCIPunfixParam(), SCIPverbMessage(), SCIPwarningMessage(), and TRUE.

Referenced by checkSolutionOrig(), and SCIPcount().

static CUTOFF_CONSTRAINT ( addBinaryCons  )

static

creates and adds a constraints which cuts off the current solution from the feasibility region in the case there are only binary variables

Definition at line 417 of file cons_countsols.c.

References CUTOFF_CONSTRAINT, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddCons(), SCIPallocBufferArray, SCIPcreateConsSetcover(), SCIPfreeBufferArray, SCIPgetNegatedVar(), SCIPgetSolVal(), SCIPisFeasIntegral(), SCIPreleaseCons(), SCIPvarIsBinary(), and TRUE.

static CUTOFF_CONSTRAINT ( addIntegerCons  )

static

creates and adds a bound disjunction constraints which cuts off the current solution from the feasibility region; if only binary variables are involved, then a set covering constraint is created which is a special case of a bound disjunction constraint

Definition at line 477 of file cons_countsols.c.

References collectSolution(), FALSE, NULL, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPaddCons(), SCIPallocBufferArray, SCIPcreateConsBounddisjunction(), SCIPcreateConsSetcover(), SCIPfreeBufferArray, SCIPgetNegatedVar(), SCIPgetSolVal(), SCIPisFeasEQ(), SCIPisFeasIntegral(), SCIPreleaseCons(), SCIPvarGetLbLocal(), SCIPvarGetType(), SCIPvarGetUbLocal(), SCIPvarIsBinary(), and TRUE.

static SCIP_RETCODE collectSolution ( SCIP *  scip, SCIP_CONSHDLRDATA *  conshdlrdata, SCIP_SOL *  sol  )

static

collect given solution or local domains as sparse solution

Parameters

scip	SCIP data structure
conshdlrdata	constraint handler data
sol	solution, or NULL if local domains

Definition at line 610 of file cons_countsols.c.

References countSparseSol(), FALSE, NULL, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIPallocMemoryArray, SCIPconvertRealToLongint(), SCIPdebugMessage, SCIPgetSolVal(), SCIPreallocMemoryArray, SCIPsparseSolCreate(), SCIPsparseSolGetLbs(), SCIPsparseSolGetUbs(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbLocal(), and SCIP_SparseSol::vars.

Referenced by checkSolution(), countSparseSol(), and CUTOFF_CONSTRAINT().

static SCIP_RETCODE countSparseSol ( SCIP *  scip, SCIP_SOL *  sol, SCIP_Bool  feasible, SCIP_CONSHDLRDATA *  conshdlrdata, SCIP_RESULT *  result  )

static

counts the number of solutions represented by sol

Note

aggregations and multi aggregations: we do not have to care about these things since we count solution from the transformed problem and therefore, SCIP does it for us

Parameters

scip	SCIP data structure
sol	solution
feasible	is solution feasible?
conshdlrdata	constraint handler data
result	pointer to store the result of the checking process

Definition at line 684 of file cons_countsols.c.

References addInt(), addOne(), allocInt(), checkLogicor(), collectSolution(), freeInt(), multInt(), NULL, SCIP_CALL, SCIP_CUTOFF, SCIP_INFEASIBLE, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPdebugMessage, SCIPgetNBinVars(), SCIPgetNPseudoBranchCands(), SCIPgetNVars(), SCIPgetPseudoBranchCands(), SCIPisFeasIntegral(), SCIPisFeasLT(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetOrigvarSum(), SCIPvarGetType(), SCIPvarGetUbLocal(), setInt(), and setPowerOfTwo().

Referenced by checkSolution(), and collectSolution().

static SCIP_RETCODE checkLogicor ( SCIP *  scip, SCIP_CONSHDLR *  conshdlr, int  nconss, SCIP_Bool *  satisfied  )

static

checks if the new solution is feasible for the logicor constraints

Note

the logicor constraints are not fully propagated; therefore, we have to check them by hand if they are satisfied or not; if a constraint is satisfied we delete it locally from the branch and bound tree.

Parameters

scip	SCIP data structure
conshdlr	constraint handler
nconss	number of enabled constraints
satisfied	pointer to store if the logicor constraints a satisfied

Definition at line 803 of file cons_countsols.c.

References checkKnapsack(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetName(), SCIPconshdlrGetConss(), SCIPconshdlrGetNActiveConss(), SCIPconshdlrGetName(), SCIPconshdlrGetNEnabledConss(), SCIPconsIsEnabled(), SCIPdebugMessage, SCIPdebugPrintCons, SCIPdelConsLocal(), SCIPgetNVarsLogicor(), SCIPgetVarsLogicor(), SCIPvarGetLbLocal(), SCIPvarIsBinary(), TRUE, and varIsUnfixedLocal().

Referenced by checkFeasSubtree(), and countSparseSol().

static SCIP_RETCODE checkKnapsack ( SCIP *  scip, SCIP_CONSHDLR *  conshdlr, int  nconss, SCIP_Bool *  satisfied  )

static

checks if the new solution is feasible for the knapsack constraints

Note

the knapsack constraints are not fully propagated; therefore, we have to check them by hand if they are satisfied or not; if a constraint is satisfied we delete it locally from the branch and bound tree.

Parameters

scip	SCIP data structure
conshdlr	constraint handler
nconss	number of enabled constraints
satisfied	pointer to store if the logicor constraints a satisfied

Definition at line 876 of file cons_countsols.c.

References checkBounddisjunction(), FALSE, NULL, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPconsGetName(), SCIPconshdlrGetConss(), SCIPconshdlrGetNActiveConss(), SCIPconshdlrGetName(), SCIPconshdlrGetNEnabledConss(), SCIPconsIsEnabled(), SCIPdebug, SCIPdebugMessage, SCIPdebugPrintCons, SCIPdelConsLocal(), SCIPgetCapacityKnapsack(), SCIPgetNVarsKnapsack(), SCIPgetVarsKnapsack(), SCIPgetWeightsKnapsack(), SCIPisFeasLT(), SCIPprintVar(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), SCIPvarIsIntegral(), TRUE, and varIsUnfixedLocal().

Referenced by checkFeasSubtree(), and checkLogicor().

static SCIP_RETCODE checkBounddisjunction ( SCIP *  scip, SCIP_CONSHDLR *  conshdlr, int  nconss, SCIP_Bool *  satisfied  )

static

checks if the new solution is feasible for the bounddisjunction constraints

Note

the bounddisjunction constraints are not fully propagated; therefore, we have to check them by hand if they are satisfied or not; if a constraint is satisfied we delete it locally from the branch and bound tree

Parameters

scip	SCIP data structure
conshdlr	constraint handler
nconss	number of enabled constraints
satisfied	pointer to store if the logicor constraints a satisfied

Definition at line 971 of file cons_countsols.c.

References checkVarbound(), FALSE, NULL, SCIP_Bool, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPconsGetName(), SCIPconshdlrGetConss(), SCIPconshdlrGetNActiveConss(), SCIPconshdlrGetName(), SCIPconshdlrGetNEnabledConss(), SCIPconsIsEnabled(), SCIPdebug, SCIPdebugMessage, SCIPdebugPrintCons, SCIPdelConsLocal(), SCIPgetBoundsBounddisjunction(), SCIPgetBoundtypesBounddisjunction(), SCIPgetNVarsBounddisjunction(), SCIPgetVarsBounddisjunction(), SCIPisFeasGE(), SCIPisFeasLE(), SCIPprintVar(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), and TRUE.

Referenced by checkFeasSubtree(), and checkKnapsack().

static SCIP_RETCODE checkVarbound ( SCIP *  scip, SCIP_CONSHDLR *  conshdlr, int  nconss, SCIP_Bool *  satisfied  )

static

checks if the new solution is feasible for the varbound constraints

Note

the varbound constraints are not fully propagated; therefore, we have to check them by hand if they are satisfied or not; if a constraint is satisfied we delete it locally from the branch and bound tree.

Parameters

scip	SCIP data structure
conshdlr	constraint handler
nconss	number of enabled constraints
satisfied	pointer to store if the logicor constraints a satisfied

Definition at line 1049 of file cons_countsols.c.

References checkFeasSubtree(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPconsGetName(), SCIPconshdlrGetConss(), SCIPconshdlrGetNActiveConss(), SCIPconshdlrGetName(), SCIPconshdlrGetNEnabledConss(), SCIPconsIsEnabled(), SCIPdebugMessage, SCIPdebugPrintCons, SCIPdelConsLocal(), SCIPgetLhsVarbound(), SCIPgetRhsVarbound(), SCIPgetVarVarbound(), SCIPgetVbdcoefVarbound(), SCIPgetVbdvarVarbound(), SCIPisGE(), SCIPisGT(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetType(), SCIPvarGetUbLocal(), and TRUE.

Referenced by checkBounddisjunction(), and checkFeasSubtree().

static SCIP_RETCODE checkFeasSubtree ( SCIP *  scip, SCIP_SOL *  sol, SCIP_Bool *  feasible  )

static

check if the current node initializes a non trivial unrestricted subtree

Parameters

scip	SCIP main data structure
sol	solution to check
feasible	pointer to store the result of the check

Definition at line 1125 of file cons_countsols.c.

References checkBounddisjunction(), checkKnapsack(), checkLogicor(), checkSolution(), checkVarbound(), CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetConss(), SCIPconshdlrGetName(), SCIPconshdlrGetNEnabledConss(), SCIPdebugMessage, SCIPdebugPrintCons, SCIPgetConshdlrs(), SCIPgetNConshdlrs(), SCIPgetNPseudoBranchCands(), and TRUE.

Referenced by checkSolution(), and checkVarbound().

static SCIP_RETCODE checkSolution ( SCIP *  scip, SCIP_SOL *  sol, SCIP_CONSHDLRDATA *  conshdlrdata, SCIP_RESULT *  result  )

static

check the given solution

Parameters

scip	SCIP data structure
sol	solution to add
conshdlrdata	constraint handler data
result	pointer to store the result of the checking process

Definition at line 1226 of file cons_countsols.c.

References addOne(), checkFeasSubtree(), checkSolutionOrig(), collectSolution(), countSparseSol(), getNCountedSols(), includeConshdlrCountsols(), NULL, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSHDLRCOPY(), SCIP_INFEASIBLE, SCIP_Longint, SCIP_OKAY, SCIPdebugMessage, SCIPgetNOrigVars(), SCIPgetNPseudoBranchCands(), SCIPgetNVars(), SCIPgetVars(), SCIPinterruptSolve(), SCIPsolGetHeur(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbGlobal(), and SCIPvarGetUbLocal().

Referenced by checkFeasSubtree(), SCIP_DECL_CONSENFOLP(), and SCIP_DECL_CONSENFOPS().

static SCIP_RETCODE includeConshdlrCountsols ( SCIP *  scip, SCIP_Bool  dialogs  )

static

creates the handler for countsols constraints and includes it in SCIP

Parameters

scip	SCIP data structure
dialogs	sould count dialogs be added

Definition at line 2476 of file cons_countsols.c.

References consCopyCountsols, CONSHDLR_CHECKPRIORITY, CONSHDLR_DESC, CONSHDLR_EAGERFREQ, CONSHDLR_ENFOPRIORITY, CONSHDLR_NAME, CONSHDLR_NEEDSCONS, conshdlrdataCreate(), createCountDialog(), DEFAULT_ACTIVE, DEFAULT_COLLECT, DEFAULT_DISCARDSOLS, DEFAULT_SOLLIMIT, DEFAULT_SPARSETEST, DISP_CUTS_DESC, DISP_CUTS_HEADER, DISP_CUTS_NAME, DISP_CUTS_POSITION, DISP_CUTS_PRIORITY, DISP_CUTS_STRIPLINE, DISP_CUTS_WIDTH, DISP_SOLS_DESC, DISP_SOLS_HEADER, DISP_SOLS_NAME, DISP_SOLS_POSITION, DISP_SOLS_PRIORITY, DISP_SOLS_STRIPLINE, DISP_SOLS_WIDTH, FALSE, NULL, SCIP_CALL, SCIP_DISPSTATUS_OFF, SCIP_LONGINT_MAX, SCIP_OKAY, SCIPaddBoolParam(), SCIPaddLongintParam(), SCIPincludeConshdlrBasic(), SCIPincludeConshdlrCountsols(), SCIPincludeDisp(), SCIPincludeExternalCodeInformation(), SCIPsetConshdlrCopy(), SCIPsetConshdlrExit(), SCIPsetConshdlrExitsol(), SCIPsetConshdlrFree(), SCIPsetConshdlrInit(), SCIPsetConshdlrInitsol(), and SCIPsnprintf().

Referenced by checkSolution(), SCIP_DECL_CONSHDLRCOPY(), SCIP_DECL_DISPOUTPUT(), and SCIPincludeConshdlrCountsols().

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyCountsols  )

static

copy method for constraint handler plugins (called when SCIP copies plugins)

Definition at line 1342 of file cons_countsols.c.

References CONSHDLR_NAME, FALSE, includeConshdlrCountsols(), NULL, SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), and TRUE.

Referenced by checkSolution().

static SCIP_DECL_CONSFREE ( consFreeCountsols  )

static

destructor of constraint handler to free constraint handler data (called when SCIP is exiting)

Definition at line 1371 of file cons_countsols.c.

References CONSHDLR_NAME, freeInt(), NULL, SCIP_DECL_CONSINIT(), SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPconshdlrSetData(), and SCIPfreeMemory.

static SCIP_DECL_CONSINIT ( consInitCountsols  )

static

initialization method of constraint handler (called after problem was transformed)

Definition at line 1397 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSEXIT(), SCIP_OKAY, SCIP_VARTYPE_CONTINUOUS, SCIPaddVarLocks(), SCIPallocMemoryArray, SCIPcaptureVar(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPgetNContVars(), SCIPgetNOrigVars(), SCIPgetNVars(), SCIPgetOrigVars(), SCIPgetTransformedVar(), SCIPvarGetName(), SCIPvarGetType(), and setInt().

Referenced by SCIP_DECL_CONSFREE().

static SCIP_DECL_CONSEXIT ( consExitCountsols  )

static

deinitialization method of constraint handler (called before transformed problem is freed)

Definition at line 1467 of file cons_countsols.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_DECL_CONSINITSOL(), SCIP_OKAY, SCIPaddVarLocks(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPfreeMemoryArrayNull, SCIPhashmapFree(), SCIPreleaseVar(), SCIPsparseSolFree(), and SCIPvarGetName().

Referenced by SCIP_DECL_CONSINIT().

static SCIP_DECL_CONSINITSOL ( consInitsolCountsols  )

static

solving process initialization method of constraint handler (called when branch and bound process is about to begin)

This method is called when the presolving was finished and the branch and bound process is about to begin. The constraint handler may use this call to initialize its branch and bound specific data.

Definition at line 1542 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSEXITSOL(), SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPblkmem(), SCIPcaptureVar(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPduplicateMemoryArray, SCIPgetNBinVars(), SCIPgetNContVars(), SCIPgetNVars(), SCIPgetVars(), SCIPhashmapCreate(), SCIPhashmapInsert(), SCIPvarGetOrigvarSum(), SCIPvarGetProbindex(), and SCIPvarGetType().

Referenced by SCIP_DECL_CONSEXIT().

static SCIP_DECL_CONSEXITSOL ( consExitsolCountsols  )

static

solving process deinitialization method of constraint handler (called before branch and bound process data is freed)

Definition at line 1627 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIP_DECL_CONSENFOLP(), SCIP_INVALIDCALL, SCIP_OKAY, SCIPABORT, SCIPconshdlrGetData(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIP_DECL_CONSINITSOL().

static SCIP_DECL_CONSENFOLP ( consEnfolpCountsols  )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 1651 of file cons_countsols.c.

References checkSolution(), NULL, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSENFOPS(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconshdlrGetData(), SCIPcreateLPSol(), SCIPdebugMessage, and SCIPfreeSol().

Referenced by SCIP_DECL_CONSEXITSOL().

static SCIP_DECL_CONSENFOPS ( consEnfopsCountsols  )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 1689 of file cons_countsols.c.

References checkSolution(), NULL, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSCHECK(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconshdlrGetData(), SCIPcreatePseudoSol(), SCIPdebugMessage, and SCIPfreeSol().

Referenced by SCIP_DECL_CONSENFOLP().

static SCIP_DECL_CONSCHECK ( consCheckCountsols  )

static

feasibility check method of constraint handler for integral solutions

Definition at line 1728 of file cons_countsols.c.

References NULL, SCIP_DECL_CONSLOCK(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconshdlrGetData(), SCIPdebugMessage, SCIPwarningMessage(), and TRUE.

Referenced by SCIP_DECL_CONSENFOPS().

static SCIP_DECL_CONSLOCK ( consLockCountsols  )

static

variable rounding lock method of constraint handler

Definition at line 1758 of file cons_countsols.c.

References SCIP_DECL_DIALOGEXEC(), and SCIP_OKAY.

Referenced by SCIP_DECL_CONSCHECK().

SCIP_DECL_DIALOGEXEC

(

SCIPdialogExecCountPresolve

)

dialog execution method for the count command

Definition at line 1769 of file cons_countsols.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_DIALOGEXEC(), SCIP_INVALIDCALL, SCIP_OKAY, SCIP_STAGE_EXITPRESOLVE, SCIP_STAGE_EXITSOLVE, SCIP_STAGE_FREE, SCIP_STAGE_FREETRANS, SCIP_STAGE_INIT, SCIP_STAGE_INITPRESOLVE, SCIP_STAGE_INITSOLVE, SCIP_STAGE_PRESOLVED, SCIP_STAGE_PRESOLVING, SCIP_STAGE_PROBLEM, SCIP_STAGE_SOLVED, SCIP_STAGE_SOLVING, SCIP_STAGE_TRANSFORMED, SCIP_STAGE_TRANSFORMING, SCIPdialoghdlrAddHistory(), SCIPdialoghdlrGetRoot(), SCIPdialogMessage(), SCIPerrorMessage, SCIPgetBoolParam(), SCIPgetStage(), SCIPpresolve(), SCIPsetBoolParam(), and TRUE.

Referenced by SCIP_DECL_CONSLOCK(), SCIP_DECL_DIALOGEXEC(), and writeExpandedSolutions().

SCIP_DECL_DIALOGEXEC

(

SCIPdialogExecCount

)

dialog execution method for the count command

Definition at line 1830 of file cons_countsols.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_SORTPTRCOMP(), SCIP_INVALIDCALL, SCIP_Longint, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_STAGE_EXITPRESOLVE, SCIP_STAGE_EXITSOLVE, SCIP_STAGE_FREE, SCIP_STAGE_FREETRANS, SCIP_STAGE_INIT, SCIP_STAGE_INITPRESOLVE, SCIP_STAGE_INITSOLVE, SCIP_STAGE_PRESOLVED, SCIP_STAGE_PRESOLVING, SCIP_STAGE_PROBLEM, SCIP_STAGE_SOLVED, SCIP_STAGE_SOLVING, SCIP_STAGE_TRANSFORMED, SCIP_STAGE_TRANSFORMING, SCIP_VERBLEVEL_FULL, SCIPallocBufferArray, SCIPcount(), SCIPdialoghdlrAddHistory(), SCIPdialoghdlrGetRoot(), SCIPdialogMessage(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBufferArray, SCIPgetBoolParam(), SCIPgetIntParam(), SCIPgetNContVars(), SCIPgetNCountedFeasSubtrees(), SCIPgetNCountedSols(), SCIPgetNCountedSolsstr(), SCIPgetStage(), SCIPisParamFixed(), SCIPpresolve(), SCIPreallocBufferArray, SCIPsetBoolParam(), SCIPsetIntParam(), SCIPunfixParam(), SCIPverbMessage(), SCIPwarningMessage(), and TRUE.

static SCIP_DECL_SORTPTRCOMP ( varCompProbindex  )

static

comparison method for sorting variables by non-decreasing w.r.t. problem index

Definition at line 2007 of file cons_countsols.c.

References NULL, SCIPvarGetProbindex(), and writeExpandedSolutions().

Referenced by SCIP_DECL_DIALOGEXEC().

static SCIP_RETCODE writeExpandedSolutions ( SCIP *  scip, FILE *  file, SCIP_VAR **  allvars, int  nallvars, SCIP_VAR **  activevars, int  nactivevars, SCIP_HASHMAP *  hashmap, SCIP_SPARSESOL **  sols, int  nsols  )

static

expands the sparse solutions and writes them to the file

Parameters

scip	SCIP data structure
file	file handler
allvars	SCIP variables
nallvars	number of all variables
activevars	SCIP variables
nactivevars	number of active variables
hashmap	hashmap from active solution variable to the position in the active variables array
sols	sparse solutions to expands and write
nsols	number of sparse solutions

Definition at line 2031 of file cons_countsols.c.

References NULL, scalars, SCIP_CALL, SCIP_DECL_DIALOGEXEC(), SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPfreeBufferArray, SCIPgetProbvarLinearSum(), SCIPhashmapExists(), SCIPhashmapGetImage(), SCIPinfoMessage(), SCIPisIntegral(), SCIPretransformObj(), SCIPsparseSolGetFirstSol(), SCIPsparseSolGetNextSol(), SCIPsparseSolGetNVars(), SCIPvarGetObj(), and TRUE.

Referenced by SCIP_DECL_DIALOGEXEC(), and SCIP_DECL_SORTPTRCOMP().

SCIP_DECL_DIALOGEXEC

(

SCIPdialogExecWriteAllsolutions

)

execution method of dialog for writing all solutions

Definition at line 2142 of file cons_countsols.c.

References CONSHDLR_NAME, createCountDialog(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_ERROR, SCIP_Longint, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_STAGE_EXITPRESOLVE, SCIP_STAGE_EXITSOLVE, SCIP_STAGE_FREE, SCIP_STAGE_FREETRANS, SCIP_STAGE_INIT, SCIP_STAGE_INITPRESOLVE, SCIP_STAGE_INITSOLVE, SCIP_STAGE_PRESOLVED, SCIP_STAGE_PRESOLVING, SCIP_STAGE_PROBLEM, SCIP_STAGE_SOLVED, SCIP_STAGE_SOLVING, SCIP_STAGE_TRANSFORMED, SCIP_STAGE_TRANSFORMING, SCIP_VARTYPE_CONTINUOUS, SCIPallocBufferArray, SCIPconshdlrGetData(), SCIPdialoghdlrAddHistory(), SCIPdialoghdlrClearBuffer(), SCIPdialoghdlrGetRoot(), SCIPdialoghdlrGetWord(), SCIPdialogMessage(), SCIPduplicateBufferArray, SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBufferArray, SCIPgetNCountedSols(), SCIPgetNCountedSolsstr(), SCIPgetNOrigVars(), SCIPgetOrigVars(), SCIPgetStage(), SCIPgetTransformedVar(), SCIPinfoMessage(), SCIPreallocBufferArray, SCIPsortDownPtrPtr(), SCIPvarGetName(), SCIPvarGetType(), TRUE, and writeExpandedSolutions().

static SCIP_RETCODE createCountDialog ( SCIP *  scip )

static

create the interactive shell dialogs for the counting process

Parameters

scip	SCIP data structure

Definition at line 2346 of file cons_countsols.c.

References FALSE, NULL, SCIP_CALL, SCIP_DECL_DISPOUTPUT(), SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPaddDialogEntry(), SCIPdialogFindEntry(), SCIPdialogHasEntry(), SCIPerrorMessage, SCIPgetRootDialog(), SCIPincludeDialog(), SCIPincludeDialogDefault(), and SCIPreleaseDialog().

Referenced by includeConshdlrCountsols(), and SCIP_DECL_DIALOGEXEC().

static SCIP_DECL_DISPOUTPUT ( dispOutputSols  )

static

output method of display column to output file stream 'file'

Definition at line 2413 of file cons_countsols.c.

References CONSHDLR_NAME, DISP_SOLS_NAME, DISP_SOLS_WIDTH, NULL, SCIP_Bool, SCIP_Longint, SCIP_OKAY, SCIPconshdlrGetNConss(), SCIPdispGetName(), SCIPdispLongint(), SCIPfindConshdlr(), SCIPgetMessagehdlr(), SCIPgetNCountedSols(), and SCIPinfoMessage().

Referenced by createCountDialog().

static SCIP_DECL_DISPOUTPUT ( dispOutputFeasSubtrees  )

static

output method of display column to output file stream 'file'

Definition at line 2448 of file cons_countsols.c.

References CONSHDLR_NAME, DISP_CUTS_NAME, DISP_CUTS_WIDTH, includeConshdlrCountsols(), NULL, SCIP_OKAY, SCIPconshdlrGetNConss(), SCIPdispGetName(), SCIPdispLongint(), SCIPfindConshdlr(), SCIPgetMessagehdlr(), and SCIPgetNCountedFeasSubtrees().

SCIP_RETCODE SCIPincludeConshdlrCountsols

(

SCIP *

scip

)

creates the handler for countsols constraints and includes it in SCIP

Parameters

scip	SCIP data structure

Definition at line 2560 of file cons_countsols.c.

References includeConshdlrCountsols(), SCIP_CALL, SCIP_OKAY, SCIPcount(), and TRUE.

Referenced by includeConshdlrCountsols(), and SCIPincludeDefaultPlugins().

SCIP_RETCODE SCIPcount

(

SCIP *

scip

)

execute counting

Parameters

scip	SCIP data structure

Definition at line 2572 of file cons_countsols.c.

References checkParameters(), CONSHDLR_NAME, FALSE, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIPgetBoolParam(), SCIPgetNCountedSols(), SCIPsetBoolParam(), SCIPsolve(), and TRUE.

Referenced by SCIP_DECL_DIALOGEXEC(), and SCIPincludeConshdlrCountsols().

SCIP_Longint SCIPgetNCountedSols	(	SCIP *	scip,
		SCIP_Bool *	valid
	)

returns number of feasible solutions found as SCIP_Longint; if the number does not fit into a SCIP_Longint the valid flag is set to FALSE

Parameters

scip	SCIP data structure
valid	pointer to store if the return value is valid

Definition at line 2604 of file cons_countsols.c.

References CONSHDLR_NAME, getNCountedSols(), NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPgetNCountedSolsstr().

Referenced by SCIP_DECL_DIALOGEXEC(), SCIP_DECL_DISPOUTPUT(), and SCIPcount().

void SCIPgetNCountedSolsstr	(	SCIP *	scip,
		char **	buffer,
		int	buffersize,
		int *	requiredsize
	)

puts the number of counted solutions in the given char* buffer

Parameters

scip	SCIP data structure
buffer	buffer to store the number for counted solutions
buffersize	buffer size
requiredsize	pointer to store the required size

Definition at line 2624 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, pow(), SCIP_Longint, SCIPconshdlrGetData(), SCIPfindConshdlr(), SCIPgetNCountedFeasSubtrees(), and toString().

Referenced by SCIP_DECL_DIALOGEXEC(), and SCIPgetNCountedSols().

SCIP_Longint SCIPgetNCountedFeasSubtrees

(

SCIP *

scip

)

returns number of counted non trivial feasible subtrees

Parameters

scip	SCIP data structure

Definition at line 2662 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPgetCountedSparseSols().

Referenced by SCIP_DECL_DIALOGEXEC(), SCIP_DECL_DISPOUTPUT(), and SCIPgetNCountedSolsstr().

void SCIPgetCountedSparseSols	(	SCIP *	scip,
		SCIP_VAR ***	vars,
		int *	nvars,
		SCIP_SPARSESOL ***	sols,
		int *	nsols
	)

Method to get the sparse solution.

Note

You get the pointer to the sparse solutions stored in the constraint handler (not a copy).

The sparse solutions are stored w.r.t. the active variables. This are the variables which got not removed during presolving. For none active variables the value has to be computed depending on their aggregation type. See for more details about that Collect all feasible solution.

Parameters

scip	SCIP data structure
vars	pointer to active variable array defining to variable order
nvars	number of active variables
sols	pointer to the solutions
nsols	pointer to number of solutions

Definition at line 2690 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPsetParamsCountsols().

Referenced by SCIPgetNCountedFeasSubtrees().

SCIP_RETCODE SCIPsetParamsCountsols

(

SCIP *

scip

)

setting SCIP parameters for such that a valid counting process is possible

Parameters

scip	SCIP data structure

Definition at line 2717 of file cons_countsols.c.

References SCIP_CALL, SCIP_OKAY, SCIP_PARAMEMPHASIS_COUNTER, SCIPsetEmphasis(), and TRUE.

Referenced by SCIPgetCountedSparseSols().