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 "blockmemshell/memory.h"
#include "scip/cons_bounddisjunction.h"
#include "scip/cons_countsols.h"
#include "scip/cons_knapsack.h"
#include "scip/cons_logicor.h"
#include "scip/cons_setppc.h"
#include "scip/cons_varbound.h"
#include "scip/dialog_default.h"
#include "scip/pub_cons.h"
#include "scip/pub_dialog.h"
#include "scip/pub_disp.h"
#include "scip/pub_heur.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_misc_sort.h"
#include "scip/pub_sol.h"
#include "scip/pub_var.h"
#include "scip/scip_branch.h"
#include "scip/scip_cons.h"
#include "scip/scip_dialog.h"
#include "scip/scip_disp.h"
#include "scip/scip_general.h"
#include "scip/scip_heur.h"
#include "scip/scip_mem.h"
#include "scip/scip_message.h"
#include "scip/scip_numerics.h"
#include "scip/scip_param.h"
#include "scip/scip_prob.h"
#include "scip/scip_sol.h"
#include "scip/scip_solve.h"
#include "scip/scip_var.h"
#include "symmetry/type_symmetry.h"
#include <string.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_CONSENFORELAX (consEnforelaxCountsols)

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

◆ CONSHDLR_NAME

#define CONSHDLR_NAME "countsols"

Definition at line 85 of file cons_countsols.c.

◆ CONSHDLR_DESC

#define CONSHDLR_DESC "constraint to count feasible solutions"

Definition at line 86 of file cons_countsols.c.

◆ CONSHDLR_ENFOPRIORITY

#define CONSHDLR_ENFOPRIORITY -9999999

priority of the constraint handler for constraint enforcing

Definition at line 87 of file cons_countsols.c.

◆ CONSHDLR_CHECKPRIORITY

#define CONSHDLR_CHECKPRIORITY -9999999

priority of the constraint handler for checking feasibility

Definition at line 88 of file cons_countsols.c.

◆ CONSHDLR_EAGERFREQ

#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 90 of file cons_countsols.c.

◆ CONSHDLR_NEEDSCONS

#define CONSHDLR_NEEDSCONS FALSE

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

Definition at line 91 of file cons_countsols.c.

◆ DEFAULT_SPARSETEST

#define DEFAULT_SPARSETEST TRUE

sparse test on or off

Definition at line 94 of file cons_countsols.c.

◆ DEFAULT_DISCARDSOLS

#define DEFAULT_DISCARDSOLS TRUE

is it allowed to discard solutions

Definition at line 95 of file cons_countsols.c.

◆ DEFAULT_ACTIVE

#define DEFAULT_ACTIVE FALSE

is the constraint handler active

Definition at line 96 of file cons_countsols.c.

◆ DEFAULT_COLLECT

#define DEFAULT_COLLECT FALSE

should the solutions be collected

Definition at line 97 of file cons_countsols.c.

◆ DEFAULT_SOLLIMIT

#define DEFAULT_SOLLIMIT -1LL

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

Definition at line 98 of file cons_countsols.c.

◆ DISP_SOLS_NAME

#define DISP_SOLS_NAME "sols"

Definition at line 101 of file cons_countsols.c.

◆ DISP_SOLS_DESC

#define DISP_SOLS_DESC "number of detected feasible solutions"

Definition at line 102 of file cons_countsols.c.

◆ DISP_SOLS_HEADER

#define DISP_SOLS_HEADER " sols "

Definition at line 103 of file cons_countsols.c.

◆ DISP_SOLS_WIDTH

#define DISP_SOLS_WIDTH 7

Definition at line 104 of file cons_countsols.c.

◆ DISP_SOLS_PRIORITY

#define DISP_SOLS_PRIORITY 110000

Definition at line 105 of file cons_countsols.c.

◆ DISP_SOLS_POSITION

#define DISP_SOLS_POSITION 100000

Definition at line 106 of file cons_countsols.c.

◆ DISP_SOLS_STRIPLINE

#define DISP_SOLS_STRIPLINE TRUE

Definition at line 107 of file cons_countsols.c.

◆ DISP_CUTS_NAME

#define DISP_CUTS_NAME "feasST"

Definition at line 109 of file cons_countsols.c.

◆ DISP_CUTS_DESC

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

Definition at line 110 of file cons_countsols.c.

◆ DISP_CUTS_HEADER

#define DISP_CUTS_HEADER "feasST"

Definition at line 111 of file cons_countsols.c.

◆ DISP_CUTS_WIDTH

#define DISP_CUTS_WIDTH 6

Definition at line 112 of file cons_countsols.c.

◆ DISP_CUTS_PRIORITY

#define DISP_CUTS_PRIORITY 110000

Definition at line 113 of file cons_countsols.c.

◆ DISP_CUTS_POSITION

#define DISP_CUTS_POSITION 110000

Definition at line 114 of file cons_countsols.c.

◆ DISP_CUTS_STRIPLINE

#define DISP_CUTS_STRIPLINE TRUE

Definition at line 115 of file cons_countsols.c.

◆ CUTOFF_CONSTRAINT

#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 124 of file cons_countsols.c.

◆ consCopyCountsols

#define consCopyCountsols NULL

Definition at line 1407 of file cons_countsols.c.

Typedef Documentation

◆ Int

typedef SCIP_Longint Int

Definition at line 81 of file cons_countsols.c.

Function Documentation

◆ allocInt()

static void allocInt ( Int * value )

static

allocates memory for the value pointer

Parameters

value pointer to the value to allocate memory

Definition at line 165 of file cons_countsols.c.

Referenced by conshdlrdataCreate(), and countSparseSol().

◆ setInt()

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 177 of file cons_countsols.c.

Referenced by countSparseSol(), and SCIP_DECL_CONSINIT().

◆ setPowerOfTwo()

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 194 of file cons_countsols.c.

References SCIP_Longint.

Referenced by countSparseSol().

◆ freeInt()

static void freeInt ( Int * value )

static

free memory

Parameters

value pointer to the value to free

Definition at line 212 of file cons_countsols.c.

Referenced by countSparseSol(), and SCIP_DECL_CONSFREE().

◆ addOne()

static void addOne ( Int * value )

static

adds one to the given value

Parameters

value pointer to the value to increase

Definition at line 224 of file cons_countsols.c.

Referenced by checkSolution(), and countSparseSol().

◆ addInt()

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 238 of file cons_countsols.c.

Referenced by countSparseSol().

◆ multInt()

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 253 of file cons_countsols.c.

Referenced by countSparseSol().

◆ toString()

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 270 of file cons_countsols.c.

References SCIP_LONGINT_FORMAT, and SCIPsnprintf().

Referenced by SCIPgetNCountedSolsstr().

◆ getNCountedSols()

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 286 of file cons_countsols.c.

References FALSE, and TRUE.

Referenced by checkSolution(), and SCIPgetNCountedSols().

◆ varIsUnfixedLocal()

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 311 of file cons_countsols.c.

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

Referenced by checkKnapsack(), and checkLogicor().

◆ conshdlrdataCreate()

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 325 of file cons_countsols.c.

References allocInt(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, and SCIPallocBlockMemory.

Referenced by includeConshdlrCountsols().

◆ checkSolutionOrig()

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 357 of file cons_countsols.c.

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

Referenced by checkSolution().

◆ checkParameters()

static SCIP_RETCODE checkParameters ( SCIP * scip )

static

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

Parameters

scip	SCIP data structure

Definition at line 393 of file cons_countsols.c.

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

Referenced by SCIPcount().

◆ CUTOFF_CONSTRAINT() [1/2]

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 460 of file cons_countsols.c.

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

◆ CUTOFF_CONSTRAINT() [2/2]

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 518 of file cons_countsols.c.

References 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.

◆ collectSolution()

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 649 of file cons_countsols.c.

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

Referenced by checkSolution(), and countSparseSol().

◆ countSparseSol()

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 solutions 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 727 of file cons_countsols.c.

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

Referenced by checkSolution().

◆ checkLogicor()

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 844 of file cons_countsols.c.

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

Referenced by checkFeasSubtree().

◆ checkKnapsack()

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 917 of file cons_countsols.c.

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

Referenced by checkFeasSubtree().

◆ checkBounddisjunction()

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 1012 of file cons_countsols.c.

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

Referenced by checkFeasSubtree().

◆ checkVarbound()

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 1090 of file cons_countsols.c.

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

Referenced by checkFeasSubtree().

◆ 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 1166 of file cons_countsols.c.

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

Referenced by checkSolution().

◆ checkSolution()

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 1267 of file cons_countsols.c.

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

Referenced by SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSENFOPS(), and SCIP_DECL_CONSENFORELAX().

◆ includeConshdlrCountsols()

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 2604 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(), SCIPincludeDisp(), SCIPincludeExternalCodeInformation(), SCIPsetConshdlrCopy(), SCIPsetConshdlrEnforelax(), SCIPsetConshdlrExit(), SCIPsetConshdlrExitsol(), SCIPsetConshdlrFree(), SCIPsetConshdlrInit(), SCIPsetConshdlrInitsol(), and SCIPsnprintf().

Referenced by SCIP_DECL_CONSHDLRCOPY(), and SCIPincludeConshdlrCountsols().

◆ SCIP_DECL_CONSHDLRCOPY()

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyCountsols )

static

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

Definition at line 1382 of file cons_countsols.c.

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

◆ SCIP_DECL_CONSFREE()

static SCIP_DECL_CONSFREE ( consFreeCountsols )

static

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

Definition at line 1411 of file cons_countsols.c.

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

◆ SCIP_DECL_CONSINIT()

static SCIP_DECL_CONSINIT ( consInitCountsols )

static

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

Definition at line 1437 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_OKAY, SCIP_VARTYPE_CONTINUOUS, SCIPaddVarLocksType(), SCIPallocBlockMemoryArray, SCIPcaptureVar(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPgetNContVars(), SCIPgetNOrigVars(), SCIPgetNVars(), SCIPgetOrigVars(), SCIPgetTransformedVar(), SCIPvarGetName(), SCIPvarGetType(), and setInt().

◆ SCIP_DECL_CONSEXIT()

static SCIP_DECL_CONSEXIT ( consExitCountsols )

static

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

Definition at line 1507 of file cons_countsols.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_OKAY, SCIPaddVarLocksType(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPfreeBlockMemoryArrayNull, SCIPfreeMemoryArrayNull, SCIPhashmapFree(), SCIPreleaseVar(), SCIPsparseSolFree(), and SCIPvarGetName().

◆ SCIP_DECL_CONSINITSOL()

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 1582 of file cons_countsols.c.

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

◆ SCIP_DECL_CONSEXITSOL()

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 1667 of file cons_countsols.c.

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

◆ SCIP_DECL_CONSENFOLP()

static SCIP_DECL_CONSENFOLP ( consEnfolpCountsols )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 1691 of file cons_countsols.c.

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

◆ SCIP_DECL_CONSENFORELAX()

static SCIP_DECL_CONSENFORELAX ( consEnforelaxCountsols )

static

constraint enforcing method of constraint handler for relaxation solutions

Definition at line 1728 of file cons_countsols.c.

References checkSolution(), NULL, SCIP_CALL, SCIP_CUTOFF, SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconshdlrGetData(), and SCIPdebugMsg.

◆ SCIP_DECL_CONSENFOPS()

static SCIP_DECL_CONSENFOPS ( consEnfopsCountsols )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 1760 of file cons_countsols.c.

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

◆ SCIP_DECL_CONSCHECK()

static SCIP_DECL_CONSCHECK ( consCheckCountsols )

static

feasibility check method of constraint handler for integral solutions

Definition at line 1798 of file cons_countsols.c.

References checkSolution(), NULL, SCIP_CALL, SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconshdlrGetData(), SCIPdebugMsg, SCIPgetNVars(), SCIPwarningMessage(), and TRUE.

◆ SCIP_DECL_CONSLOCK()

static SCIP_DECL_CONSLOCK ( consLockCountsols )

static

variable rounding lock method of constraint handler

Definition at line 1831 of file cons_countsols.c.

References SCIP_OKAY.

◆ SCIP_DECL_SORTPTRCOMP()

static SCIP_DECL_SORTPTRCOMP ( varCompProbindex )

static

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

Definition at line 2144 of file cons_countsols.c.

References NULL, and SCIPvarGetProbindex().

◆ writeExpandedSolutions()

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 2168 of file cons_countsols.c.

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

Referenced by SCIP_DECL_DIALOGEXEC().

◆ createCountDialog()

static SCIP_RETCODE createCountDialog ( SCIP * scip )

static

create the interactive shell dialogs for the counting process

Parameters

scip	SCIP data structure

Definition at line 2483 of file cons_countsols.c.

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

Referenced by includeConshdlrCountsols().

◆ SCIP_DECL_DISPOUTPUT() [1/2]

static SCIP_DECL_DISPOUTPUT ( dispOutputSols )

static

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

Definition at line 2541 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().

◆ SCIP_DECL_DISPOUTPUT() [2/2]

static SCIP_DECL_DISPOUTPUT ( dispOutputFeasSubtrees )

static

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

Definition at line 2576 of file cons_countsols.c.

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

SCIP

Detailed Description

Macros

Typedefs

Functions

Macro Definition Documentation

◆ CONSHDLR_NAME

◆ CONSHDLR_DESC

◆ CONSHDLR_ENFOPRIORITY

◆ CONSHDLR_CHECKPRIORITY

◆ CONSHDLR_EAGERFREQ

◆ CONSHDLR_NEEDSCONS

◆ DEFAULT_SPARSETEST

◆ DEFAULT_DISCARDSOLS

◆ DEFAULT_ACTIVE

◆ DEFAULT_COLLECT

◆ DEFAULT_SOLLIMIT

◆ DISP_SOLS_NAME

◆ DISP_SOLS_DESC

◆ DISP_SOLS_HEADER

◆ DISP_SOLS_WIDTH

◆ DISP_SOLS_PRIORITY

◆ DISP_SOLS_POSITION

◆ DISP_SOLS_STRIPLINE

◆ DISP_CUTS_NAME

◆ DISP_CUTS_DESC

◆ DISP_CUTS_HEADER

◆ DISP_CUTS_WIDTH

◆ DISP_CUTS_PRIORITY

◆ DISP_CUTS_POSITION

◆ DISP_CUTS_STRIPLINE

◆ CUTOFF_CONSTRAINT

◆ consCopyCountsols

Typedef Documentation

◆ Int

Function Documentation

◆ allocInt()

◆ setInt()

◆ setPowerOfTwo()

◆ freeInt()

◆ addOne()

◆ addInt()

◆ multInt()

◆ toString()

◆ getNCountedSols()

◆ varIsUnfixedLocal()

◆ conshdlrdataCreate()

◆ checkSolutionOrig()

◆ checkParameters()

◆ CUTOFF_CONSTRAINT() [1/2]

◆ CUTOFF_CONSTRAINT() [2/2]

◆ collectSolution()

◆ countSparseSol()

◆ checkLogicor()

◆ checkKnapsack()

◆ checkBounddisjunction()

◆ checkVarbound()

◆ checkFeasSubtree()

◆ checkSolution()

◆ includeConshdlrCountsols()

◆ SCIP_DECL_CONSHDLRCOPY()

◆ SCIP_DECL_CONSFREE()

◆ SCIP_DECL_CONSINIT()

◆ SCIP_DECL_CONSEXIT()

◆ SCIP_DECL_CONSINITSOL()

◆ SCIP_DECL_CONSEXITSOL()

◆ SCIP_DECL_CONSENFOLP()

◆ SCIP_DECL_CONSENFORELAX()

◆ SCIP_DECL_CONSENFOPS()

◆ SCIP_DECL_CONSCHECK()

◆ SCIP_DECL_CONSLOCK()

◆ SCIP_DECL_SORTPTRCOMP()

◆ writeExpandedSolutions()

◆ createCountDialog()

◆ SCIP_DECL_DISPOUTPUT() [1/2]

◆ SCIP_DECL_DISPOUTPUT() [2/2]