Detailed Description

Constraint handler for AND-constraints, \(r = x_1 \wedge x_2 \wedge \dots \wedge x_n\).

Author: Tobias Achterberg; Stefan Heinz; Michael Winkler

This constraint handler deals with AND-constraints. These are constraint of the form:

\[ r = x_1 \wedge x_2 \wedge \dots \wedge x_n \]

where \(x_i\) is a binary variable for all \(i\). Hence, \(r\) is also of binary type. The variable \(r\) is called resultant and the \(x\)'s operators.

Definition in file cons_and.c.

#include "blockmemshell/memory.h"
#include "scip/cons_and.h"
#include "scip/cons_linear.h"
#include "scip/cons_logicor.h"
#include "scip/cons_pseudoboolean.h"
#include "scip/cons_setppc.h"
#include "scip/expr_product.h"
#include "scip/expr_var.h"
#include "scip/debug.h"
#include "scip/pub_cons.h"
#include "scip/pub_event.h"
#include "scip/pub_lp.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_misc_sort.h"
#include "scip/pub_var.h"
#include "scip/scip_conflict.h"
#include "scip/scip_cons.h"
#include "scip/scip_copy.h"
#include "scip/scip_cut.h"
#include "scip/scip_event.h"
#include "scip/scip_expr.h"
#include "scip/scip_general.h"
#include "scip/scip_lp.h"
#include "scip/scip_mem.h"
#include "scip/scip_message.h"
#include "scip/scip_nlp.h"
#include "scip/scip_numerics.h"
#include "scip/scip_param.h"
#include "scip/scip_prob.h"
#include "scip/scip_probing.h"
#include "scip/scip_sol.h"
#include "scip/scip_tree.h"
#include "scip/scip_var.h"
#include "scip/symmetry_graph.h"
#include "symmetry/struct_symmetry.h"
#include <string.h>

Go to the source code of this file.

Macros
#define	CONSHDLR_NAME "and"

#define	CONSHDLR_DESC "constraint handler for AND-constraints: r = and(x1, ..., xn)"

#define	CONSHDLR_SEPAPRIORITY +850100

#define	CONSHDLR_ENFOPRIORITY -850100

#define	CONSHDLR_CHECKPRIORITY -850100

#define	CONSHDLR_SEPAFREQ 1

#define	CONSHDLR_PROPFREQ 1

#define	CONSHDLR_EAGERFREQ 100

#define	CONSHDLR_MAXPREROUNDS -1

#define	CONSHDLR_DELAYSEPA FALSE

#define	CONSHDLR_DELAYPROP FALSE

#define	CONSHDLR_NEEDSCONS TRUE

#define	CONSHDLR_PRESOLTIMING (SCIP_PRESOLTIMING_FAST \| SCIP_PRESOLTIMING_EXHAUSTIVE)

#define	CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

#define	EVENTHDLR_NAME "and"

#define	EVENTHDLR_DESC "bound change event handler for AND-constraints"

#define	DEFAULT_PRESOLPAIRWISE TRUE

#define	DEFAULT_LINEARIZE FALSE

#define	DEFAULT_ENFORCECUTS TRUE

#define	DEFAULT_AGGRLINEARIZATION FALSE

#define	DEFAULT_UPGRRESULTANT TRUE

#define	DEFAULT_DUALPRESOLVING TRUE

#define	HASHSIZE_ANDCONS 500

#define	DEFAULT_PRESOLUSEHASHING TRUE

#define	NMINCOMPARISONS 200000

#define	MINGAINPERNMINCOMPARISONS 1e-06

Typedefs
typedef enum Proprule	PROPRULE

Enumerations
enum	Proprule { PROPRULE_INVALID = 0 , PROPRULE_1 = 1 , PROPRULE_2 = 2 , PROPRULE_3 = 3 , PROPRULE_4 = 4 , PROPRULE_0_INVALID = 0 , PROPRULE_1_CORETIMES = 1 , PROPRULE_2_EDGEFINDING = 2 , PROPRULE_3_TTEF = 3 , PROPRULE_1_RHS = 1 , PROPRULE_1_LHS = 2 , PROPRULE_1_RANGEDROW = 3 , PROPRULE_INVALID = 0 , PROPRULE_1 = 0 , PROPRULE_2 = 1 , PROPRULE_3 = 2 , PROPRULE_4 = 3 , PROPRULE_INVALID = 4 , PROPRULE_1 , PROPRULE_2 , PROPRULE_3 , PROPRULE_4 , PROPRULE_0 , PROPRULE_1 , PROPRULE_INTLB , PROPRULE_INTUB , PROPRULE_INVALID }

Functions
static SCIP_RETCODE	lockRounding (SCIP scip, SCIP_CONS cons, SCIP_VAR *var)

static SCIP_RETCODE	unlockRounding (SCIP scip, SCIP_CONS cons, SCIP_VAR *var)

static SCIP_RETCODE	conshdlrdataCreate (SCIP scip, SCIP_CONSHDLRDATA conshdlrdata, SCIP_EVENTHDLR eventhdlr)

static void	conshdlrdataFree (SCIP scip, SCIP_CONSHDLRDATA *conshdlrdata)

static SCIP_RETCODE	consdataCatchWatchedEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR eventhdlr, int pos, int filterpos)

static SCIP_RETCODE	consdataDropWatchedEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr, int pos, int filterpos)

static SCIP_RETCODE	consdataCatchEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr)

static SCIP_RETCODE	consdataDropEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr)

static SCIP_RETCODE	consdataSwitchWatchedvars (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr, int watchedvar1, int watchedvar2)

static SCIP_RETCODE	consdataEnsureVarsSize (SCIP scip, SCIP_CONSDATA consdata, int num)

static SCIP_RETCODE	consdataCreate (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR eventhdlr, int nvars, SCIP_VAR *vars, SCIP_VAR resvar, SCIP_Bool checkwhenupgr, SCIP_Bool notremovablewhenupgr)

static SCIP_RETCODE	consdataFreeRows (SCIP scip, SCIP_CONSDATA consdata)

static SCIP_RETCODE	consdataFree (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR eventhdlr)

static SCIP_RETCODE	consdataPrint (SCIP scip, SCIP_CONSDATA consdata, FILE *file)

static SCIP_RETCODE	addCoef (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR eventhdlr, SCIP_VAR var)

static SCIP_RETCODE	delCoefPos (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR *eventhdlr, int pos)

static void	consdataSort (SCIP_CONSDATA *consdata)

static SCIP_RETCODE	applyFixings (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR eventhdlr, int nchgcoefs)

static SCIP_RETCODE	createRelaxation (SCIP scip, SCIP_CONS cons)

static SCIP_RETCODE	addRelaxation (SCIP scip, SCIP_CONS cons, SCIP_Bool *infeasible)

static SCIP_RETCODE	addNlrow (SCIP scip, SCIP_CONS cons)

static SCIP_RETCODE	checkCons (SCIP scip, SCIP_CONS cons, SCIP_SOL sol, SCIP_Bool checklprows, SCIP_Bool printreason, SCIP_Bool violated)

static SCIP_RETCODE	separateCons (SCIP scip, SCIP_CONS cons, SCIP_SOL sol, SCIP_Bool separated, SCIP_Bool *cutoff)

static SCIP_RETCODE	analyzeConflictOne (SCIP scip, SCIP_CONS cons, int falsepos)

static SCIP_RETCODE	analyzeConflictZero (SCIP scip, SCIP_CONS cons)

static SCIP_RETCODE	consdataFixResultantZero (SCIP scip, SCIP_CONS cons, SCIP_VAR resvar, int pos, SCIP_Bool cutoff, int *nfixedvars)

static SCIP_RETCODE	consdataFixOperandsOne (SCIP scip, SCIP_CONS cons, SCIP_VAR *vars, int nvars, SCIP_Bool cutoff, int *nfixedvars)

static SCIP_RETCODE	consdataLinearize (SCIP scip, SCIP_CONS cons, SCIP_Bool cutoff, int nfixedvars, int *nupgdconss)

static SCIP_RETCODE	analyzeZeroResultant (SCIP scip, SCIP_CONS cons, int watchedvar1, int watchedvar2, SCIP_Bool cutoff, int nfixedvars)

static SCIP_RETCODE	mergeMultiples (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR eventhdlr, unsigned char entries, int nentries, int nfixedvars, int nchgcoefs, int *ndelconss)

static SCIP_RETCODE	propagateCons (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR eventhdlr, SCIP_Bool cutoff, int nfixedvars, int nupgdconss)

static SCIP_RETCODE	resolvePropagation (SCIP scip, SCIP_CONS cons, SCIP_VAR infervar, PROPRULE proprule, SCIP_BDCHGIDX bdchgidx, SCIP_RESULT *result)

static SCIP_RETCODE	dualPresolve (SCIP scip, SCIP_CONS conss, int nconss, SCIP_EVENTHDLR eventhdlr, unsigned char *entries, int nentries, SCIP_Bool cutoff, int nfixedvars, int naggrvars, int nchgcoefs, int ndelconss, int nupgdconss, int *naddconss)

static SCIP_RETCODE	cliquePresolve (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR eventhdlr, SCIP_Bool cutoff, int nfixedvars, int naggrvars, int nchgcoefs, int ndelconss, int *naddconss)

static	SCIP_DECL_HASHGETKEY (hashGetKeyAndcons)

static	SCIP_DECL_HASHKEYEQ (hashKeyEqAndcons)

static	SCIP_DECL_HASHKEYVAL (hashKeyValAndcons)

static SCIP_RETCODE	detectRedundantConstraints (SCIP scip, BMS_BLKMEM blkmem, SCIP_CONS *conss, int nconss, int firstchange, SCIP_Bool cutoff, int naggrvars, int *ndelconss)

static SCIP_RETCODE	enforceConstraint (SCIP scip, SCIP_CONSHDLR conshdlr, SCIP_CONS *conss, int nconss, SCIP_SOL sol, SCIP_RESULT *result)

static SCIP_RETCODE	preprocessConstraintPairs (SCIP scip, SCIP_CONS conss, int firstchange, int chkind, SCIP_Bool cutoff, int naggrvars, int nbdchgs, int *ndelconss)

static SCIP_RETCODE	addSymmetryInformation (SCIP scip, SYM_SYMTYPE symtype, SCIP_CONS cons, SYM_GRAPH graph, SCIP_Bool success)

static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyAnd)

static	SCIP_DECL_CONSFREE (consFreeAnd)

static	SCIP_DECL_CONSINITPRE (consInitpreAnd)

static	SCIP_DECL_CONSINITSOL (consInitsolAnd)

static	SCIP_DECL_CONSEXITSOL (consExitsolAnd)

static	SCIP_DECL_CONSDELETE (consDeleteAnd)

static	SCIP_DECL_CONSTRANS (consTransAnd)

static	SCIP_DECL_CONSINITLP (consInitlpAnd)

static	SCIP_DECL_CONSSEPALP (consSepalpAnd)

static	SCIP_DECL_CONSSEPASOL (consSepasolAnd)

static	SCIP_DECL_CONSENFOLP (consEnfolpAnd)

static	SCIP_DECL_CONSENFORELAX (consEnforelaxAnd)

static	SCIP_DECL_CONSENFOPS (consEnfopsAnd)

static	SCIP_DECL_CONSCHECK (consCheckAnd)

static	SCIP_DECL_CONSPROP (consPropAnd)

static	SCIP_DECL_CONSPRESOL (consPresolAnd)

static	SCIP_DECL_CONSRESPROP (consRespropAnd)

static	SCIP_DECL_CONSLOCK (consLockAnd)

static	SCIP_DECL_CONSACTIVE (consActiveAnd)

static	SCIP_DECL_CONSDEACTIVE (consDeactiveAnd)

static	SCIP_DECL_CONSPRINT (consPrintAnd)

static	SCIP_DECL_CONSCOPY (consCopyAnd)

static	SCIP_DECL_CONSPARSE (consParseAnd)

static	SCIP_DECL_CONSGETVARS (consGetVarsAnd)

static	SCIP_DECL_CONSGETNVARS (consGetNVarsAnd)

static	SCIP_DECL_CONSGETPERMSYMGRAPH (consGetPermsymGraphAnd)

static	SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH (consGetSignedPermsymGraphAnd)

static	SCIP_DECL_EVENTEXEC (eventExecAnd)

SCIP_RETCODE	SCIPincludeConshdlrAnd (SCIP *scip)

SCIP_RETCODE	SCIPcreateConsAnd (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR resvar, int nvars, SCIP_VAR *vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)

SCIP_RETCODE	SCIPcreateConsBasicAnd (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR resvar, int nvars, SCIP_VAR *vars)

int	SCIPgetNVarsAnd (SCIP scip, SCIP_CONS cons)

SCIP_VAR **	SCIPgetVarsAnd (SCIP scip, SCIP_CONS cons)

SCIP_VAR *	SCIPgetResultantAnd (SCIP scip, SCIP_CONS cons)

SCIP_Bool	SCIPisAndConsSorted (SCIP scip, SCIP_CONS cons)

SCIP_RETCODE	SCIPsortAndCons (SCIP scip, SCIP_CONS cons)

SCIP_RETCODE	SCIPchgAndConsCheckFlagWhenUpgr (SCIP scip, SCIP_CONS cons, SCIP_Bool flag)

SCIP_RETCODE	SCIPchgAndConsRemovableFlagWhenUpgr (SCIP scip, SCIP_CONS cons, SCIP_Bool flag)

Macro Definition Documentation

◆ CONSHDLR_NAME

#define CONSHDLR_NAME "and"

Definition at line 85 of file cons_and.c.

◆ CONSHDLR_DESC

#define CONSHDLR_DESC "constraint handler for AND-constraints: r = and(x1, ..., xn)"

Definition at line 86 of file cons_and.c.

◆ CONSHDLR_SEPAPRIORITY

#define CONSHDLR_SEPAPRIORITY +850100

priority of the constraint handler for separation

Definition at line 87 of file cons_and.c.

◆ CONSHDLR_ENFOPRIORITY

#define CONSHDLR_ENFOPRIORITY -850100

priority of the constraint handler for constraint enforcing

Definition at line 88 of file cons_and.c.

◆ CONSHDLR_CHECKPRIORITY

#define CONSHDLR_CHECKPRIORITY -850100

priority of the constraint handler for checking feasibility

Definition at line 89 of file cons_and.c.

◆ CONSHDLR_SEPAFREQ

#define CONSHDLR_SEPAFREQ 1

frequency for separating cuts; zero means to separate only in the root node

Definition at line 90 of file cons_and.c.

◆ CONSHDLR_PROPFREQ

#define CONSHDLR_PROPFREQ 1

frequency for propagating domains; zero means only preprocessing propagation

Definition at line 91 of file cons_and.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 93 of file cons_and.c.

◆ CONSHDLR_MAXPREROUNDS

#define CONSHDLR_MAXPREROUNDS -1

maximal number of presolving rounds the constraint handler participates in (-1: no limit)

Definition at line 94 of file cons_and.c.

◆ CONSHDLR_DELAYSEPA

#define CONSHDLR_DELAYSEPA FALSE

should separation method be delayed, if other separators found cuts?

Definition at line 95 of file cons_and.c.

◆ CONSHDLR_DELAYPROP

#define CONSHDLR_DELAYPROP FALSE

should propagation method be delayed, if other propagators found reductions?

Definition at line 96 of file cons_and.c.

◆ CONSHDLR_NEEDSCONS

#define CONSHDLR_NEEDSCONS TRUE

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

Definition at line 97 of file cons_and.c.

◆ CONSHDLR_PRESOLTIMING

#define CONSHDLR_PRESOLTIMING (SCIP_PRESOLTIMING_FAST | SCIP_PRESOLTIMING_EXHAUSTIVE)

Definition at line 99 of file cons_and.c.

◆ CONSHDLR_PROP_TIMING

#define CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

Definition at line 100 of file cons_and.c.

◆ EVENTHDLR_NAME

#define EVENTHDLR_NAME "and"

Definition at line 102 of file cons_and.c.

◆ EVENTHDLR_DESC

#define EVENTHDLR_DESC "bound change event handler for AND-constraints"

Definition at line 103 of file cons_and.c.

◆ DEFAULT_PRESOLPAIRWISE

#define DEFAULT_PRESOLPAIRWISE TRUE

should pairwise constraint comparison be performed in presolving?

Definition at line 105 of file cons_and.c.

◆ DEFAULT_LINEARIZE

#define DEFAULT_LINEARIZE FALSE

should constraint get linearized and removed?

Definition at line 106 of file cons_and.c.

◆ DEFAULT_ENFORCECUTS

#define DEFAULT_ENFORCECUTS TRUE

should cuts be separated during LP enforcing?

Definition at line 107 of file cons_and.c.

◆ DEFAULT_AGGRLINEARIZATION

#define DEFAULT_AGGRLINEARIZATION FALSE

should an aggregated linearization be used?

Definition at line 108 of file cons_and.c.

◆ DEFAULT_UPGRRESULTANT

#define DEFAULT_UPGRRESULTANT TRUE

should all binary resultant variables be upgraded to implicit binary variables

Definition at line 109 of file cons_and.c.

◆ DEFAULT_DUALPRESOLVING

#define DEFAULT_DUALPRESOLVING TRUE

should dual presolving be performed?

Definition at line 110 of file cons_and.c.

◆ HASHSIZE_ANDCONS

#define HASHSIZE_ANDCONS 500

minimal size of hash table in and constraint tables

Definition at line 112 of file cons_and.c.

◆ DEFAULT_PRESOLUSEHASHING

#define DEFAULT_PRESOLUSEHASHING TRUE

should hash table be used for detecting redundant constraints in advance

Definition at line 113 of file cons_and.c.

◆ NMINCOMPARISONS

#define NMINCOMPARISONS 200000

number for minimal pairwise presolving comparisons

Definition at line 114 of file cons_and.c.

◆ MINGAINPERNMINCOMPARISONS

#define MINGAINPERNMINCOMPARISONS 1e-06

minimal gain per minimal pairwise presolving comparisons to repeat pairwise comparison round

Definition at line 115 of file cons_and.c.

Typedef Documentation

◆ PROPRULE

typedef enum Proprule PROPRULE

Definition at line 179 of file cons_and.c.

Enumeration Type Documentation

◆ Proprule

enum Proprule

Enumerator
PROPRULE_INVALID	propagation was applied without a specific propagation rule
PROPRULE_1	v_i = FALSE => r = FALSE
PROPRULE_2	r = TRUE => v_i = TRUE for all i
PROPRULE_3	v_i = TRUE for all i => r = TRUE
PROPRULE_4	r = FALSE, v_i = TRUE for all i except j => v_j = FALSE
PROPRULE_0_INVALID	invalid inference information
PROPRULE_1_CORETIMES	core-time propagator
PROPRULE_2_EDGEFINDING	edge-finder
PROPRULE_3_TTEF	time-table edeg-finding
PROPRULE_1_RHS	activity residuals of all other variables tighten bounds of single variable due to the right hand side of the inequality
PROPRULE_1_LHS	activity residuals of all other variables tighten bounds of single variable due to the left hand side of the inequality
PROPRULE_1_RANGEDROW	fixed variables and gcd of all left variables tighten bounds of a single variable in this reanged row
PROPRULE_INVALID	propagation was applied without a specific propagation rule
PROPRULE_1	v_i = TRUE => r = TRUE
PROPRULE_2	r = FALSE => v_i = FALSE for all i
PROPRULE_3	v_i = FALSE for all i => r = FALSE
PROPRULE_4	r = TRUE, v_i = FALSE for all i except j => v_j = TRUE
PROPRULE_INVALID	propagation was applied without a specific propagation rule
PROPRULE_1	left hand side and bounds on y -> lower bound on x
PROPRULE_2	left hand side and upper bound on x -> bound on y
PROPRULE_3	right hand side and bounds on y -> upper bound on x
PROPRULE_4	right hand side and lower bound on x -> bound on y
PROPRULE_0	all variables are fixed => fix integral variable
PROPRULE_1	all except one variable fixed => fix remaining variable
PROPRULE_INTLB	lower bound propagation of integral variable
PROPRULE_INTUB	upper bound propagation of integral variable
PROPRULE_INVALID	propagation was applied without a specific propagation rule

Definition at line 171 of file cons_and.c.

Function Documentation

◆ lockRounding()

static SCIP_RETCODE lockRounding	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	var
	)

static

installs rounding locks for the given variable in the given AND-constraint

Parameters

scip	SCIP data structure
cons	constraint data
var	variable of constraint entry

Definition at line 188 of file cons_and.c.

References SCIP_CALL, SCIP_OKAY, SCIPlockVarCons(), and TRUE.

Referenced by addCoef().

◆ unlockRounding()

static SCIP_RETCODE unlockRounding	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	var
	)

static

removes rounding locks for the given variable in the given AND-constraint

Parameters

scip	SCIP data structure
cons	constraint data
var	variable of constraint entry

Definition at line 202 of file cons_and.c.

References SCIP_CALL, SCIP_OKAY, SCIPunlockVarCons(), and TRUE.

Referenced by delCoefPos().

◆ conshdlrdataCreate()

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

static

creates constraint handler data

Parameters

scip	SCIP data structure
conshdlrdata	pointer to store the constraint handler data
eventhdlr	event handler

Definition at line 216 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_OKAY, and SCIPallocBlockMemory.

Referenced by SCIPincludeConshdlrAnd().

◆ conshdlrdataFree()

static void conshdlrdataFree	(	SCIP *	scip,
		SCIP_CONSHDLRDATA **	conshdlrdata
	)

static

frees constraint handler data

Parameters

scip	SCIP data structure
conshdlrdata	pointer to the constraint handler data

Definition at line 236 of file cons_and.c.

References NULL, and SCIPfreeBlockMemory.

Referenced by SCIP_DECL_CONSFREE().

◆ consdataCatchWatchedEvents()

static SCIP_RETCODE consdataCatchWatchedEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	pos,
		int *	filterpos
	)

static

catches events for the watched variable at given position

Parameters

scip	SCIP data structure
consdata	AND-constraint data
eventhdlr	event handler to call for the event processing
pos	array position of variable to catch bound change events for
filterpos	pointer to store position of event filter entry

Definition at line 249 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_EVENTTYPE_UBRELAXED, SCIP_OKAY, and SCIPcatchVarEvent().

Referenced by consdataSwitchWatchedvars().

◆ consdataDropWatchedEvents()

static SCIP_RETCODE consdataDropWatchedEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	pos,
		int	filterpos
	)

static

drops events for the watched variable at given position

Parameters

scip	SCIP data structure
consdata	AND-constraint data
eventhdlr	event handler to call for the event processing
pos	array position of watched variable to drop bound change events for
filterpos	position of event filter entry

Definition at line 273 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_EVENTTYPE_UBRELAXED, SCIP_OKAY, and SCIPdropVarEvent().

Referenced by consdataSwitchWatchedvars().

◆ consdataCatchEvents()

static SCIP_RETCODE consdataCatchEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

catches needed events on all variables of constraint, except the special ones for watched variables

Parameters

scip	SCIP data structure
consdata	AND-constraint data
eventhdlr	event handler to call for the event processing

Definition at line 296 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDCHANGED, SCIP_EVENTTYPE_LBRELAXED, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_OKAY, and SCIPcatchVarEvent().

Referenced by consdataCreate().

◆ consdataDropEvents()

static SCIP_RETCODE consdataDropEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

drops events on all variables of constraint, except the special ones for watched variables

Parameters

scip	SCIP data structure
consdata	AND-constraint data
eventhdlr	event handler to call for the event processing

Definition at line 322 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDCHANGED, SCIP_EVENTTYPE_LBRELAXED, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_OKAY, and SCIPdropVarEvent().

Referenced by consdataFree().

◆ consdataSwitchWatchedvars()

static SCIP_RETCODE consdataSwitchWatchedvars	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	watchedvar1,
		int	watchedvar2
	)

static

stores the given variable numbers as watched variables, and updates the event processing

Parameters

scip	SCIP data structure
consdata	AND-constraint data
eventhdlr	event handler to call for the event processing
watchedvar1	new first watched variable
watchedvar2	new second watched variable

Definition at line 348 of file cons_and.c.

References consdataCatchWatchedEvents(), consdataDropWatchedEvents(), NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by consdataFree(), delCoefPos(), and propagateCons().

◆ consdataEnsureVarsSize()

static SCIP_RETCODE consdataEnsureVarsSize	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		int	num
	)

static

ensures, that the vars array can store at least num entries

Parameters

scip	SCIP data structure
consdata	linear constraint data
num	minimum number of entries to store

Definition at line 408 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPcalcMemGrowSize(), and SCIPreallocBlockMemoryArray.

Referenced by addCoef().

◆ consdataCreate()

static SCIP_RETCODE consdataCreate	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	nvars,
		SCIP_VAR **	vars,
		SCIP_VAR *	resvar,
		SCIP_Bool	checkwhenupgr,
		SCIP_Bool	notremovablewhenupgr
	)

static

creates constraint data for AND-constraint

Parameters

scip	SCIP data structure
consdata	pointer to store the constraint data
eventhdlr	event handler to call for the event processing
nvars	number of variables in the AND-constraint
vars	variables in AND-constraint
resvar	resultant variable
checkwhenupgr	should an upgraded constraint be checked despite the fact that this AND-constraint will not be checked
notremovablewhenupgr	should an upgraded constraint be despite the fact that this AND-constraint will not be checked

Definition at line 432 of file cons_and.c.

References consdataCatchEvents(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_STAGE_EXITPRESOLVE, SCIPallocBlockMemory, SCIPcaptureVar(), SCIPduplicateBlockMemoryArray, SCIPgetStage(), SCIPgetTransformedVar(), SCIPgetTransformedVars(), SCIPisTransformed(), SCIPmarkDoNotMultaggrVar(), SCIPvarIsBinary(), and TRUE.

Referenced by SCIP_DECL_CONSTRANS(), and SCIPcreateConsAnd().

◆ consdataFreeRows()

static SCIP_RETCODE consdataFreeRows	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata
	)

static

releases LP rows of constraint data and frees rows array

Parameters

scip	SCIP data structure
consdata	constraint data

Definition at line 515 of file cons_and.c.

References NULL, r, SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemoryArray, and SCIPreleaseRow().

Referenced by consdataFree(), and SCIP_DECL_CONSEXITSOL().

◆ consdataFree()

static SCIP_RETCODE consdataFree	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

frees constraint data for AND-constraint

Parameters

scip	SCIP data structure
consdata	pointer to the constraint data
eventhdlr	event handler to call for the event processing

Definition at line 546 of file cons_and.c.

References consdataDropEvents(), consdataFreeRows(), consdataSwitchWatchedvars(), NULL, SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemory, SCIPfreeBlockMemoryArray, SCIPisTransformed(), SCIPreleaseNlRow(), and SCIPreleaseVar().

Referenced by SCIP_DECL_CONSDELETE().

◆ consdataPrint()

static SCIP_RETCODE consdataPrint	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		FILE *	file
	)

static

prints AND-constraint to file stream

Parameters

scip	SCIP data structure
consdata	AND-constraint data
file	output file (or NULL for standard output)

Definition at line 596 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPinfoMessage(), SCIPwriteVarName(), SCIPwriteVarsList(), and TRUE.

Referenced by applyFixings(), and SCIP_DECL_CONSPRINT().

◆ addCoef()

static SCIP_RETCODE addCoef	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		SCIP_VAR *	var
	)

static

adds coefficient to AND-constraint

Parameters

scip	SCIP data structure
cons	linear constraint
eventhdlr	event handler to call for the event processing
var	variable to add to the constraint

Definition at line 621 of file cons_and.c.

References consdataEnsureVarsSize(), FALSE, lockRounding(), NULL, SCIP_Bool, SCIP_CALL, SCIP_EVENTTYPE_LBRELAXED, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_INVALIDCALL, SCIP_OKAY, SCIPcaptureVar(), SCIPcatchVarEvent(), SCIPconsGetData(), SCIPconsIsTransformed(), SCIPerrorMessage, SCIPgetTransformedVar(), SCIPvarIsTransformed(), and TRUE.

Referenced by applyFixings().

◆ delCoefPos()

static SCIP_RETCODE delCoefPos	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		int	pos
	)

static

deletes coefficient at given position from AND-constraint data

Parameters

scip	SCIP data structure
cons	AND-constraint
eventhdlr	event handler to call for the event processing
pos	position of coefficient to delete

Definition at line 681 of file cons_and.c.

References consdataSwitchWatchedvars(), FALSE, NULL, SCIP_CALL, SCIP_EVENTTYPE_LBRELAXED, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_OKAY, SCIPconsGetData(), SCIPconsIsTransformed(), SCIPdropVarEvent(), SCIPreleaseVar(), SCIPvarIsTransformed(), TRUE, and unlockRounding().

Referenced by applyFixings(), cliquePresolve(), dualPresolve(), and mergeMultiples().

◆ consdataSort()

static void consdataSort ( SCIP_CONSDATA * consdata )

static

sorts AND-constraint's variables by non-decreasing variable index

Parameters

consdata constraint data

Definition at line 744 of file cons_and.c.

References NULL, SCIP_Bool, SCIPsortedvecFindPtr(), SCIPsortPtr(), SCIPvarCompare(), and TRUE.

Referenced by detectRedundantConstraints(), preprocessConstraintPairs(), SCIP_DECL_HASHKEYEQ(), and SCIPsortAndCons().

◆ applyFixings()

static SCIP_RETCODE applyFixings	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		int *	nchgcoefs
	)

static

deletes all one-fixed variables

Parameters

scip	SCIP data structure
cons	AND-constraint
eventhdlr	event handler to call for the event processing
nchgcoefs	pointer to add up the number of changed coefficients

Definition at line 825 of file cons_and.c.

References addCoef(), consdataPrint(), delCoefPos(), NULL, SCIP_Bool, SCIP_CALL, SCIP_EVENTTYPE_BOUNDCHANGED, SCIP_OKAY, SCIPcaptureVar(), SCIPcatchVarEvent(), SCIPconsGetData(), SCIPconsIsTransformed(), SCIPdebug, SCIPdebugMsg, SCIPdebugMsgPrint, SCIPdropVarEvent(), SCIPgetBinvarRepresentative(), SCIPisFeasEQ(), SCIPreleaseVar(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), SCIPvarIsActive(), SCIPvarIsBinary(), and TRUE.

Referenced by dualPresolve(), and SCIP_DECL_CONSPRESOL().

◆ createRelaxation()

static SCIP_RETCODE createRelaxation	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

static

creates a linearization of the AND-constraint

Parameters

scip	SCIP data structure
cons	constraint to check

Definition at line 925 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPaddVarsToRowSameCoef(), SCIPaddVarToRow(), SCIPallocBlockMemoryArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsRemovable(), SCIPcreateEmptyRowCons(), SCIPinfinity(), and SCIPsnprintf().

Referenced by addRelaxation(), and separateCons().

◆ addRelaxation()

static SCIP_RETCODE addRelaxation	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Bool *	infeasible
	)

static

adds linear relaxation of AND-constraint to the LP

Parameters

scip	SCIP data structure
cons	constraint to check
infeasible	pointer to store whether an infeasibility was detected

Definition at line 972 of file cons_and.c.

References createRelaxation(), FALSE, NULL, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPaddRow(), SCIPaddVarsToRowSameCoef(), SCIPaddVarToRow(), SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsRemovable(), SCIPcreateEmptyRowCons(), SCIPinfinity(), SCIProwIsInLP(), and SCIPsnprintf().

Referenced by SCIP_DECL_CONSINITLP().

◆ addNlrow()

static SCIP_RETCODE addNlrow	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

static

adds constraint as row to the NLP, if not added yet

Parameters

scip	SCIP data structure
cons	and constraint

Definition at line 1032 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_EXPRCURV_UNKNOWN, SCIP_OKAY, SCIP_Real, SCIPaddNlRow(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsActive(), SCIPconsIsChecked(), SCIPconsIsLocal(), SCIPcreateExprProduct(), SCIPcreateExprVar(), SCIPcreateNlRow(), SCIPfreeBufferArray, SCIPisNLPConstructed(), SCIPnlrowIsInNLP(), and SCIPreleaseExpr().

Referenced by SCIP_DECL_CONSACTIVE(), and SCIP_DECL_CONSINITSOL().

◆ checkCons()

static SCIP_RETCODE checkCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_SOL *	sol,
		SCIP_Bool	checklprows,
		SCIP_Bool	printreason,
		SCIP_Bool *	violated
	)

static

checks AND-constraint for feasibility of given solution: returns TRUE iff constraint is feasible

Parameters

scip	SCIP data structure
cons	constraint to check
sol	solution to check, NULL for current solution
checklprows	Do constraints represented by rows in the current LP have to be checked?
printreason	Should the reason for the violation be printed?
violated	pointer to store whether the constraint is violated

Definition at line 1085 of file cons_and.c.

References FALSE, MAX3, NULL, r, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPconsGetData(), SCIPgetSolVal(), SCIPincConsAge(), SCIPinfoMessage(), SCIPisFeasPositive(), SCIPprintCons(), SCIPresetConsAge(), SCIProwIsInLP(), SCIPupdateSolConsViolation(), SCIPvarGetName(), and TRUE.

Referenced by enforceConstraint(), SCIP_DECL_CONSCHECK(), and SCIP_DECL_CONSENFOPS().

◆ separateCons()

static SCIP_RETCODE separateCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_SOL *	sol,
		SCIP_Bool *	separated,
		SCIP_Bool *	cutoff
	)

static

separates given primal solution

Parameters

scip	SCIP data structure
cons	constraint to check
sol	primal CIP solution, NULL for current LP solution
separated	pointer to store whether a cut was found
cutoff	whether a cutoff has been detected

Definition at line 1197 of file cons_and.c.

References createRelaxation(), FALSE, NULL, r, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddRow(), SCIPconsGetData(), SCIPgetRowSolFeasibility(), SCIPisFeasNegative(), SCIProwIsInLP(), and TRUE.

Referenced by enforceConstraint(), SCIP_DECL_CONSSEPALP(), and SCIP_DECL_CONSSEPASOL().

◆ analyzeConflictOne()

static SCIP_RETCODE analyzeConflictOne	(	SCIP *	scip,
		SCIP_CONS *	cons,
		int	falsepos
	)

static

analyzes conflicting TRUE assignment to resultant of given constraint, and adds conflict constraint to problem

Parameters

scip	SCIP data structure
cons	AND-constraint that detected the conflict
falsepos	position of operand that is fixed to FALSE

Definition at line 1246 of file cons_and.c.

References FALSE, NULL, SCIP_CALL, SCIP_CONFTYPE_PROPAGATION, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPaddConflictBinvar(), SCIPanalyzeConflictCons(), SCIPconsGetData(), SCIPgetStage(), SCIPinitConflictAnalysis(), SCIPinProbing(), SCIPisConflictAnalysisApplicable(), SCIPvarGetLbLocal(), and SCIPvarGetUbLocal().

Referenced by consdataFixOperandsOne(), and consdataFixResultantZero().

◆ analyzeConflictZero()

static SCIP_RETCODE analyzeConflictZero	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

static

analyzes conflicting FALSE assignment to resultant of given constraint, and adds conflict constraint to problem

Parameters

scip	SCIP data structure
cons	or constraint that detected the conflict

Definition at line 1278 of file cons_and.c.

References FALSE, NULL, SCIP_CALL, SCIP_CONFTYPE_PROPAGATION, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPaddConflictBinvar(), SCIPanalyzeConflictCons(), SCIPconsGetData(), SCIPconsIsModifiable(), SCIPgetStage(), SCIPinitConflictAnalysis(), SCIPinProbing(), SCIPisConflictAnalysisApplicable(), SCIPvarGetLbLocal(), and SCIPvarGetUbLocal().

Referenced by analyzeZeroResultant(), and propagateCons().

◆ consdataFixResultantZero()

static SCIP_RETCODE consdataFixResultantZero	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	resvar,
		int	pos,
		SCIP_Bool *	cutoff,
		int *	nfixedvars
	)

static

tries to fix the given resultant to zero

Parameters

scip	SCIP data structure
cons	AND-constraint to be processed
resvar	resultant variable to fix to zero
pos	position of operand that is fixed to FALSE
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions

Definition at line 1314 of file cons_and.c.

References analyzeConflictOne(), FALSE, PROPRULE_1, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetName(), SCIPdebugMsg, SCIPdelConsLocal(), SCIPinferBinvarCons(), SCIPresetConsAge(), SCIPvarGetName(), and TRUE.

Referenced by propagateCons().

◆ consdataFixOperandsOne()

static SCIP_RETCODE consdataFixOperandsOne	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR **	vars,
		int	nvars,
		SCIP_Bool *	cutoff,
		int *	nfixedvars
	)

static

fix all operands to one

Parameters

scip	SCIP data structure
cons	AND-constraint to be processed
vars	array of operands
nvars	number of operands
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions

Definition at line 1353 of file cons_and.c.

References analyzeConflictOne(), PROPRULE_2, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetName(), SCIPdebugMsg, SCIPdelConsLocal(), SCIPinferBinvarCons(), SCIPresetConsAge(), SCIPvarGetName(), and TRUE.

Referenced by propagateCons().

◆ consdataLinearize()

static SCIP_RETCODE consdataLinearize	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Bool *	cutoff,
		int *	nfixedvars,
		int *	nupgdconss
	)

static

linearize AND-constraint due to a globally to zero fixed resultant; that is, creates, adds, and releases a logicor constraint and remove the AND-constraint globally.

Since the resultant is fixed to zero the AND-constraint collapses to linear constraint of the form:

\(\sum_{i=0}^{n-1} v_i \leq n-1\)

This can be transformed into a logicor constraint of the form

\(\sum_{i=0}^{n-1} ~v_i \geq 1\)

Parameters

scip	SCIP data structure
cons	AND-constraint to linearize
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions
nupgdconss	pointer to add up the number of upgraded constraints

Definition at line 1407 of file cons_and.c.

References FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPaddCons(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsLogicor(), SCIPcreateConsSetpack(), SCIPdebugPrintCons, SCIPdelCons(), SCIPfixVar(), SCIPfreeBufferArray, SCIPgetBinvarRepresentatives(), SCIPgetNegatedVar(), SCIPreleaseCons(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), and TRUE.

Referenced by propagateCons().

◆ analyzeZeroResultant()

static SCIP_RETCODE analyzeZeroResultant	(	SCIP *	scip,
		SCIP_CONS *	cons,
		int	watchedvar1,
		int	watchedvar2,
		SCIP_Bool *	cutoff,
		int *	nfixedvars
	)

static

the resultant is fixed to zero; in case all except one operator are fixed to TRUE the last operator has to fixed to FALSE

Note: consdata->watchedvars might not be the same to the watchedvar parameters, because the update was not yet done

Parameters

scip	SCIP data structure
cons	AND-constraint to be processed
watchedvar1	maybe last unfixed variable position
watchedvar2	second watched position
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions

Definition at line 1518 of file cons_and.c.

References analyzeConflictZero(), FALSE, NULL, PROPRULE_4, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMsg, SCIPdelConsLocal(), SCIPinferBinvarCons(), SCIPresetConsAge(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbLocal(), and TRUE.

Referenced by propagateCons().

◆ mergeMultiples()

static SCIP_RETCODE mergeMultiples	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		unsigned char **	entries,
		int *	nentries,
		int *	nfixedvars,
		int *	nchgcoefs,
		int *	ndelconss
	)

static

replaces multiple occurrences of variables

Parameters

scip	SCIP data structure
cons	AND-constraint
eventhdlr	event handler to call for the event processing
entries	array to store whether two positions in constraints represent the same variable
nentries	pointer for array size, if array will be to small it's corrected
nfixedvars	pointer to store number of fixed variables
nchgcoefs	pointer to store number of changed coefficients
ndelconss	pointer to store number of deleted constraints

Definition at line 1579 of file cons_and.c.

References delCoefPos(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_IMPLINT, SCIP_VARTYPE_INTEGER, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMsg, SCIPdelCons(), SCIPfixVar(), SCIPgetNBinVars(), SCIPgetNImplVars(), SCIPgetNIntVars(), SCIPvarGetName(), SCIPvarGetNegatedVar(), SCIPvarGetProbindex(), SCIPvarGetType(), SCIPvarIsActive(), SCIPvarIsBinary(), SCIPvarIsNegated(), and TRUE.

Referenced by dualPresolve(), and SCIP_DECL_CONSPRESOL().

◆ propagateCons()

static SCIP_RETCODE propagateCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		SCIP_Bool *	cutoff,
		int *	nfixedvars,
		int *	nupgdconss
	)

static

propagates constraint with the following rules: (1) v_i = FALSE => r = FALSE (2) r = TRUE => v_i = TRUE for all i (3) v_i = TRUE for all i => r = TRUE (4) r = FALSE, v_i = TRUE for all i except j => v_j = FALSE

additional if the resultant is fixed to zero during presolving or in the root node (globally), then the AND-constraint is collapsed to a linear (logicor) constraint of the form -> sum_{i=0}^{n-1} ~v_i >= 1

Parameters

scip	SCIP data structure
cons	AND-constraint to be processed
eventhdlr	event handler to call for the event processing
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions
nupgdconss	pointer to add up the number of upgraded constraints

Definition at line 1736 of file cons_and.c.

References analyzeConflictZero(), analyzeZeroResultant(), consdataFixOperandsOne(), consdataFixResultantZero(), consdataLinearize(), consdataSwitchWatchedvars(), NULL, PROPRULE_3, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsModifiable(), SCIPcutoffNode(), SCIPdebugMsg, SCIPdelConsLocal(), SCIPgetDepth(), SCIPgetRootNode(), SCIPincConsAge(), SCIPinferBinvarCons(), SCIPinProbing(), SCIPinRepropagation(), SCIPisFeasEQ(), SCIPresetConsAge(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), and TRUE.

Referenced by dualPresolve(), SCIP_DECL_CONSPRESOL(), and SCIP_DECL_CONSPROP().

◆ resolvePropagation()

static SCIP_RETCODE resolvePropagation	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	infervar,
		PROPRULE	proprule,
		SCIP_BDCHGIDX *	bdchgidx,
		SCIP_RESULT *	result
	)

static

resolves a conflict on the given variable by supplying the variables needed for applying the corresponding propagation rule (see propagateCons()): (1) v_i = FALSE => r = FALSE (2) r = TRUE => v_i = TRUE for all i (3) v_i = TRUE for all i => r = TRUE (4) r = FALSE, v_i = TRUE for all i except j => v_j = FALSE

Parameters

scip	SCIP data structure
cons	constraint that inferred the bound change
infervar	variable that was deduced
proprule	propagation rule that deduced the value
bdchgidx	bound change index (time stamp of bound change), or NULL for current time
result	pointer to store the result of the propagation conflict resolving call

Definition at line 1941 of file cons_and.c.

References FALSE, NULL, PROPRULE_1, PROPRULE_2, PROPRULE_3, PROPRULE_4, PROPRULE_INVALID, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_SUCCESS, SCIPaddConflictBinvar(), SCIPconsGetData(), SCIPconsGetName(), SCIPerrorMessage, SCIPgetVarLbAtIndex(), SCIPgetVarUbAtIndex(), and TRUE.

Referenced by SCIP_DECL_CONSRESPROP().

◆ dualPresolve()

static SCIP_RETCODE dualPresolve	(	SCIP *	scip,
		SCIP_CONS **	conss,
		int	nconss,
		SCIP_EVENTHDLR *	eventhdlr,
		unsigned char **	entries,
		int *	nentries,
		SCIP_Bool *	cutoff,
		int *	nfixedvars,
		int *	naggrvars,
		int *	nchgcoefs,
		int *	ndelconss,
		int *	nupgdconss,
		int *	naddconss
	)

static

perform dual presolving on AND-constraints

Parameters

scip	SCIP data structure
conss	AND-constraints to perform dual presolving on
nconss	number of AND-constraints
eventhdlr	event handler to call for the event processing
entries	array to store whether two positions in constraints represent the same variable
nentries	pointer for array size, if array will be to small it's corrected
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions
naggrvars	pointer to add up the number of aggregated variables
nchgcoefs	pointer to add up the number of changed coefficients
ndelconss	pointer to add up the number of deleted constraints
nupgdconss	pointer to add up the number of upgraded constraints
naddconss	pointer to add up the number of added constraints

Definition at line 2027 of file cons_and.c.

References applyFixings(), delCoefPos(), FALSE, mergeMultiples(), NULL, propagateCons(), REALABS, SCIP_Bool, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPaddCons(), SCIPaggregateVars(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsActive(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsLinear(), SCIPdebugMsg, SCIPdelCons(), SCIPfixVar(), SCIPfreeBufferArray, SCIPgetNBinVars(), SCIPgetNImplVars(), SCIPinfinity(), SCIPisEQ(), SCIPisGE(), SCIPisGT(), SCIPisInfinity(), SCIPisLE(), SCIPisLT(), SCIPisNegative(), SCIPisPositive(), SCIPreleaseCons(), SCIPsnprintf(), SCIPvarGetAggregatedObj(), SCIPvarGetLbGlobal(), SCIPvarGetName(), SCIPvarGetNLocksDownType(), SCIPvarGetNLocksUpType(), SCIPvarGetUbGlobal(), and TRUE.

Referenced by SCIP_DECL_CONSPRESOL().

◆ cliquePresolve()

static SCIP_RETCODE cliquePresolve	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		SCIP_Bool *	cutoff,
		int *	nfixedvars,
		int *	naggrvars,
		int *	nchgcoefs,
		int *	ndelconss,
		int *	naddconss
	)

static

check if at least two operands or one operand and the resultant are in one clique, if so, we can fix the resultant to zero and in the former case we can also delete this constraint but we need to extract the clique information as constraint

x == AND(y, z) and clique(y,z) => x = 0, delete constraint and create y + z <= 1 x == AND(y, z) and clique(x,y) => x = 0

special handled cases are:
- if the resultant is a negation of an operand, in that case we fix the resultant to 0
- if the resultant is equal to an operand, we will linearize this constraint by adding all necessary set-packing constraints like resultant + ~operand <= 1 and delete the old constraint
x == AND(~x, y) => x = 0 x == AND(x, y) => add x + ~y <= 1 and delete the constraint
check if one operand is in a clique with the negation of all other operands, this means we can aggregate this operand to the resultant

r == AND(x,y,z) and clique(x,~y) and clique(x,~z) => r == x
check if the resultant and the negations of all operands are in a clique

r == AND(x,y) and clique(r, ~x,~y) => upgrade the constraint to a set-partitioning constraint r + ~x + ~y = 1

Note: We removed also fixed variables and propagate them, and if only one operand is remaining due to removal, we will aggregate the resultant with this operand

Parameters

scip	SCIP data structure
cons	constraint to process
eventhdlr	event handler to call for the event processing
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions
naggrvars	pointer to add up the number of aggregated variables
nchgcoefs	pointer to add up the number of changed coefficients
ndelconss	pointer to add up the number of deleted constraints
naddconss	pointer to add up the number of added constraints

Definition at line 2679 of file cons_and.c.

References BMSclearMemoryArray, delCoefPos(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_VARSTATUS_FIXED, SCIPaddCons(), SCIPaggregateVars(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsActive(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsSetpack(), SCIPcreateConsSetpart(), SCIPdebugMsg, SCIPdebugPrintCons, SCIPdelCons(), SCIPfixVar(), SCIPfreeBufferArray, SCIPgetNegatedVar(), SCIPreleaseCons(), SCIPsnprintf(), SCIPvarGetLbGlobal(), SCIPvarGetName(), SCIPvarGetNegatedVar(), SCIPvarGetProbvarBinary(), SCIPvarGetStatus(), SCIPvarGetUbGlobal(), SCIPvarsHaveCommonClique(), and TRUE.

Referenced by SCIP_DECL_CONSPRESOL().

◆ SCIP_DECL_HASHGETKEY()

static SCIP_DECL_HASHGETKEY ( hashGetKeyAndcons )

static

gets the key of the given element

Definition at line 3327 of file cons_and.c.

◆ SCIP_DECL_HASHKEYEQ()

static SCIP_DECL_HASHKEYEQ ( hashKeyEqAndcons )

static

returns TRUE iff both keys are equal; two constraints are equal if they have the same variables

Definition at line 3335 of file cons_and.c.

References consdataSort(), FALSE, NULL, SCIP_Bool, SCIPconsGetData(), SCIPvarCompare(), and TRUE.

◆ SCIP_DECL_HASHKEYVAL()

static SCIP_DECL_HASHKEYVAL ( hashKeyValAndcons )

static

returns the hash value of the key

Definition at line 3381 of file cons_and.c.

References NULL, SCIPconsGetData(), SCIPhashFour, and SCIPvarGetIndex().

◆ detectRedundantConstraints()

static SCIP_RETCODE detectRedundantConstraints	(	SCIP *	scip,
		BMS_BLKMEM *	blkmem,
		SCIP_CONS **	conss,
		int	nconss,
		int *	firstchange,
		SCIP_Bool *	cutoff,
		int *	naggrvars,
		int *	ndelconss
	)

static

compares each constraint with all other constraints for possible redundancy and removes or changes constraint accordingly; in contrast to removeRedundantConstraints(), it uses a hash table

Parameters

scip	SCIP data structure
blkmem	block memory
conss	constraint set
nconss	number of constraints in constraint set
firstchange	pointer to store first changed constraint
cutoff	pointer to store TRUE, if a cutoff was found
naggrvars	pointer to count number of aggregated variables
ndelconss	pointer to count number of deleted constraints

Definition at line 3405 of file cons_and.c.

References consdataSort(), FALSE, HASHSIZE_ANDCONS, MAX, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPaggregateVars(), SCIPconsGetData(), SCIPconsGetPos(), SCIPconsIsActive(), SCIPconsIsModifiable(), SCIPdelCons(), SCIPdoNotAggr(), SCIPhashtableCreate(), SCIPhashtableFree(), SCIPhashtableInsert(), SCIPhashtableRetrieve(), SCIPupdateConsFlags(), SCIPvarCompare(), and TRUE.

Referenced by SCIP_DECL_CONSPRESOL().

◆ enforceConstraint()

static SCIP_RETCODE enforceConstraint	(	SCIP *	scip,
		SCIP_CONSHDLR *	conshdlr,
		SCIP_CONS **	conss,
		int	nconss,
		SCIP_SOL *	sol,
		SCIP_RESULT *	result
	)

static

helper function to enforce constraints

Parameters

scip	SCIP data structure
conshdlr	constraint handler
conss	constraints to process
nconss	number of constraints
sol	solution to enforce (NULL for the LP solution)
result	pointer to store the result of the enforcing call

Definition at line 3525 of file cons_and.c.

References checkCons(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIP_SEPARATED, SCIPconshdlrGetData(), and separateCons().

Referenced by SCIP_DECL_CONSENFOLP(), and SCIP_DECL_CONSENFORELAX().

◆ preprocessConstraintPairs()

static SCIP_RETCODE preprocessConstraintPairs	(	SCIP *	scip,
		SCIP_CONS **	conss,
		int	firstchange,
		int	chkind,
		SCIP_Bool *	cutoff,
		int *	naggrvars,
		int *	nbdchgs,
		int *	ndelconss
	)

static

compares constraint with all prior constraints for possible redundancy or aggregation, and removes or changes constraint accordingly

Parameters

scip	SCIP data structure
conss	constraint set
firstchange	first constraint that changed since last pair preprocessing round
chkind	index of constraint to check against all prior indices upto startind
cutoff	pointer to store TRUE, if a cutoff was found
naggrvars	pointer to count number of aggregated variables
nbdchgs	pointer to count the number of performed bound changes, or NULL
ndelconss	pointer to count number of deleted constraints

Definition at line 3582 of file cons_and.c.

References consdataSort(), FALSE, NULL, SCIP_Bool, SCIP_BOUNDTYPE_LOWER, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPaddVarImplication(), SCIPaggregateVars(), SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsActive(), SCIPconsIsModifiable(), SCIPdebugMsg, SCIPdelCons(), SCIPdoNotAggr(), SCIPerrorMessage, SCIPisStopped(), SCIPupdateConsFlags(), SCIPvarCompare(), SCIPvarGetName(), and TRUE.

Referenced by SCIP_DECL_CONSPRESOL().

◆ addSymmetryInformation()

static SCIP_RETCODE addSymmetryInformation	(	SCIP *	scip,
		SYM_SYMTYPE	symtype,
		SCIP_CONS *	cons,
		SYM_GRAPH *	graph,
		SCIP_Bool *	success
	)

static

adds symmetry information of constraint to a symmetry detection graph

Parameters

scip	SCIP pointer
symtype	type of symmetries that need to be added
cons	constraint
graph	symmetry detection graph
success	pointer to store whether symmetry information could be added

Definition at line 3786 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPconsGetData(), SCIPextendPermsymDetectionGraphLinear(), SCIPfreeBufferArray, SCIPgetNVars(), SCIPgetNVarsAnd(), SCIPgetResultantAnd(), SCIPgetSymActiveVariables(), SCIPgetVarsAnd(), and SCIPisTransformed().

Referenced by SCIP_DECL_CONSGETPERMSYMGRAPH(), and SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH().

◆ SCIP_DECL_CONSHDLRCOPY()

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyAnd )

static

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

Definition at line 3847 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetName(), SCIPincludeConshdlrAnd(), and TRUE.

◆ SCIP_DECL_CONSFREE()

static SCIP_DECL_CONSFREE ( consFreeAnd )

static

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

Definition at line 3863 of file cons_and.c.

References conshdlrdataFree(), NULL, SCIP_OKAY, SCIPconshdlrGetData(), and SCIPconshdlrSetData().

◆ SCIP_DECL_CONSINITPRE()

static SCIP_DECL_CONSINITPRE ( consInitpreAnd )

static

presolving initialization method of constraint handler (called when presolving is about to begin)

Definition at line 3881 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPaddCons(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsAdded(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsLinear(), SCIPdelCons(), SCIPfreeBufferArray, SCIPinfinity(), SCIPreallocBufferArray, SCIPreleaseCons(), and SCIPsnprintf().

◆ SCIP_DECL_CONSINITSOL()

static SCIP_DECL_CONSINITSOL ( consInitsolAnd )

static

solving process initialization method of constraint handler

Definition at line 4164 of file cons_and.c.

References addNlrow(), SCIP_CALL, SCIP_OKAY, and SCIPisNLPConstructed().

◆ SCIP_DECL_CONSEXITSOL()

static SCIP_DECL_CONSEXITSOL ( consExitsolAnd )

static

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

Definition at line 4181 of file cons_and.c.

References consdataFreeRows(), NULL, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), and SCIPreleaseNlRow().

◆ SCIP_DECL_CONSDELETE()

static SCIP_DECL_CONSDELETE ( consDeleteAnd )

static

frees specific constraint data

Definition at line 4206 of file cons_and.c.

References consdataFree(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPconshdlrGetData().

◆ SCIP_DECL_CONSTRANS()

static SCIP_DECL_CONSTRANS ( consTransAnd )

static

transforms constraint data into data belonging to the transformed problem

Definition at line 4221 of file cons_and.c.

References consdataCreate(), NULL, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), and SCIPcreateCons().

◆ SCIP_DECL_CONSINITLP()

static SCIP_DECL_CONSINITLP ( consInitlpAnd )

static

LP initialization method of constraint handler (called before the initial LP relaxation at a node is solved)

Definition at line 4251 of file cons_and.c.

References addRelaxation(), FALSE, SCIP_CALL, SCIP_OKAY, and SCIPconsIsInitial().

◆ SCIP_DECL_CONSSEPALP()

static SCIP_DECL_CONSSEPALP ( consSepalpAnd )

static

separation method of constraint handler for LP solutions

Definition at line 4269 of file cons_and.c.

References NULL, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_SEPARATED, and separateCons().

◆ SCIP_DECL_CONSSEPASOL()

static SCIP_DECL_CONSSEPASOL ( consSepasolAnd )

static

separation method of constraint handler for arbitrary primal solutions

Definition at line 4296 of file cons_and.c.

References SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_SEPARATED, and separateCons().

◆ SCIP_DECL_CONSENFOLP()

static SCIP_DECL_CONSENFOLP ( consEnfolpAnd )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 4323 of file cons_and.c.

References enforceConstraint(), NULL, SCIP_CALL, and SCIP_OKAY.

◆ SCIP_DECL_CONSENFORELAX()

static SCIP_DECL_CONSENFORELAX ( consEnforelaxAnd )

static

constraint enforcing method of constraint handler for relaxation solutions

Definition at line 4332 of file cons_and.c.

References enforceConstraint(), SCIP_CALL, and SCIP_OKAY.

◆ SCIP_DECL_CONSENFOPS()

static SCIP_DECL_CONSENFOPS ( consEnfopsAnd )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 4341 of file cons_and.c.

References checkCons(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, and TRUE.

◆ SCIP_DECL_CONSCHECK()

static SCIP_DECL_CONSCHECK ( consCheckAnd )

static

feasibility check method of constraint handler and

Definition at line 4363 of file cons_and.c.

References checkCons(), SCIP_Bool, SCIP_CALL, SCIP_FEASIBLE, SCIP_INFEASIBLE, and SCIP_OKAY.

◆ SCIP_DECL_CONSPROP()

static SCIP_DECL_CONSPROP ( consPropAnd )

static

domain propagation method of constraint handler

Definition at line 4382 of file cons_and.c.

References FALSE, NULL, propagateCons(), SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_REDUCEDDOM, and SCIPconshdlrGetData().

◆ SCIP_DECL_CONSPRESOL()

static SCIP_DECL_CONSPRESOL ( consPresolAnd )

static

presolving method of constraint handler

Definition at line 4417 of file cons_and.c.

References applyFixings(), cliquePresolve(), detectRedundantConstraints(), dualPresolve(), FALSE, mergeMultiples(), MINGAINPERNMINCOMPARISONS, NMINCOMPARISONS, NULL, preprocessConstraintPairs(), propagateCons(), SCIP_Bool, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_CUTOFF, SCIP_DIDNOTFIND, SCIP_Longint, SCIP_OKAY, SCIP_PRESOLTIMING_EXHAUSTIVE, SCIP_Real, SCIP_SUCCESS, SCIPaddVarImplication(), SCIPaggregateVars(), SCIPallocBufferArray, SCIPallowStrongDualReds(), SCIPblkmem(), SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsActive(), SCIPconsIsDeleted(), SCIPconsIsModifiable(), SCIPdebugMsg, SCIPdelCons(), SCIPdoNotAggr(), SCIPfreeBufferArray, SCIPgetNContVars(), SCIPgetNVars(), SCIPisFeasEQ(), SCIPisStopped(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), and TRUE.

◆ SCIP_DECL_CONSRESPROP()

static SCIP_DECL_CONSRESPROP ( consRespropAnd )

static

propagation conflict resolving method of constraint handler

Definition at line 4646 of file cons_and.c.

References resolvePropagation(), SCIP_CALL, and SCIP_OKAY.

◆ SCIP_DECL_CONSLOCK()

static SCIP_DECL_CONSLOCK ( consLockAnd )

static

variable rounding lock method of constraint handler

Definition at line 4656 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_OKAY, SCIPaddVarLocksType(), and SCIPconsGetData().

◆ SCIP_DECL_CONSACTIVE()

static SCIP_DECL_CONSACTIVE ( consActiveAnd )

static

constraint activation notification method of constraint handler

Definition at line 4680 of file cons_and.c.

References addNlrow(), SCIP_CALL, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPgetStage(), and SCIPisNLPConstructed().

◆ SCIP_DECL_CONSDEACTIVE()

static SCIP_DECL_CONSDEACTIVE ( consDeactiveAnd )

static

constraint deactivation notification method of constraint handler

Definition at line 4692 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPconsGetData(), SCIPdelNlRow(), and SCIPgetStage().

◆ SCIP_DECL_CONSPRINT()

static SCIP_DECL_CONSPRINT ( consPrintAnd )

static

constraint display method of constraint handler

Definition at line 4714 of file cons_and.c.

References consdataPrint(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPconsGetData().

◆ SCIP_DECL_CONSCOPY()

static SCIP_DECL_CONSCOPY ( consCopyAnd )

static

constraint copying method of constraint handler

Definition at line 4727 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPallocBufferArray, SCIPconsGetName(), SCIPcreateConsAnd(), SCIPfreeBufferArray, SCIPgetNVarsAnd(), SCIPgetResultantAnd(), SCIPgetVarCopy(), SCIPgetVarsAnd(), and TRUE.

◆ SCIP_DECL_CONSPARSE()

static SCIP_DECL_CONSPARSE ( consParseAnd )

static

constraint parsing method of constraint handler

Definition at line 4788 of file cons_and.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPcreateConsAnd(), SCIPdebugMsg, SCIPduplicateBufferArray, SCIPerrorMessage, SCIPfreeBufferArray, SCIPparseVarName(), SCIPparseVarsList(), SCIPreallocBufferArray, and TRUE.

◆ SCIP_DECL_CONSGETVARS()

static SCIP_DECL_CONSGETVARS ( consGetVarsAnd )

static

constraint method of constraint handler which returns the variables (if possible)

Definition at line 4897 of file cons_and.c.

References BMScopyMemoryArray, FALSE, NULL, SCIP_OKAY, SCIPconsGetData(), and TRUE.

◆ SCIP_DECL_CONSGETNVARS()

static SCIP_DECL_CONSGETNVARS ( consGetNVarsAnd )

static

constraint method of constraint handler which returns the number of variable (if possible)

Definition at line 4918 of file cons_and.c.

References NULL, SCIP_OKAY, SCIPconsGetData(), and TRUE.

◆ SCIP_DECL_CONSGETPERMSYMGRAPH()

static SCIP_DECL_CONSGETPERMSYMGRAPH ( consGetPermsymGraphAnd )

static

constraint handler method which returns the permutation symmetry detection graph of a constraint

Definition at line 4935 of file cons_and.c.

References addSymmetryInformation(), SCIP_CALL, SCIP_OKAY, and SYM_SYMTYPE_PERM.

◆ SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH()

static SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH ( consGetSignedPermsymGraphAnd )

static

constraint handler method which returns the signed permutation symmetry detection graph of a constraint

Definition at line 4944 of file cons_and.c.

References addSymmetryInformation(), SCIP_CALL, SCIP_OKAY, and SYM_SYMTYPE_SIGNPERM.

◆ SCIP_DECL_EVENTEXEC()

static SCIP_DECL_EVENTEXEC ( eventExecAnd )

static

Definition at line 4956 of file cons_and.c.

References FALSE, NULL, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_OKAY, and SCIPeventGetType().

SCIP

Detailed Description

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

◆ CONSHDLR_NAME

◆ CONSHDLR_DESC

◆ CONSHDLR_SEPAPRIORITY

◆ CONSHDLR_ENFOPRIORITY

◆ CONSHDLR_CHECKPRIORITY

◆ CONSHDLR_SEPAFREQ

◆ CONSHDLR_PROPFREQ

◆ CONSHDLR_EAGERFREQ

◆ CONSHDLR_MAXPREROUNDS

◆ CONSHDLR_DELAYSEPA

◆ CONSHDLR_DELAYPROP

◆ CONSHDLR_NEEDSCONS

◆ CONSHDLR_PRESOLTIMING

◆ CONSHDLR_PROP_TIMING

◆ EVENTHDLR_NAME

◆ EVENTHDLR_DESC

◆ DEFAULT_PRESOLPAIRWISE

◆ DEFAULT_LINEARIZE

◆ DEFAULT_ENFORCECUTS

◆ DEFAULT_AGGRLINEARIZATION

◆ DEFAULT_UPGRRESULTANT

◆ DEFAULT_DUALPRESOLVING

◆ HASHSIZE_ANDCONS

◆ DEFAULT_PRESOLUSEHASHING

◆ NMINCOMPARISONS

◆ MINGAINPERNMINCOMPARISONS

Typedef Documentation

◆ PROPRULE

Enumeration Type Documentation

◆ Proprule

Function Documentation

◆ lockRounding()

◆ unlockRounding()

◆ conshdlrdataCreate()

◆ conshdlrdataFree()

◆ consdataCatchWatchedEvents()

◆ consdataDropWatchedEvents()

◆ consdataCatchEvents()

◆ consdataDropEvents()

◆ consdataSwitchWatchedvars()

◆ consdataEnsureVarsSize()

◆ consdataCreate()

◆ consdataFreeRows()

◆ consdataFree()

◆ consdataPrint()

◆ addCoef()

◆ delCoefPos()

◆ consdataSort()

◆ applyFixings()

◆ createRelaxation()

◆ addRelaxation()

◆ addNlrow()

◆ checkCons()

◆ separateCons()

◆ analyzeConflictOne()

◆ analyzeConflictZero()

◆ consdataFixResultantZero()

◆ consdataFixOperandsOne()

◆ consdataLinearize()

◆ analyzeZeroResultant()

◆ mergeMultiples()

◆ propagateCons()

◆ resolvePropagation()

◆ dualPresolve()

◆ cliquePresolve()

◆ SCIP_DECL_HASHGETKEY()

◆ SCIP_DECL_HASHKEYEQ()

◆ SCIP_DECL_HASHKEYVAL()

◆ detectRedundantConstraints()

◆ enforceConstraint()

◆ preprocessConstraintPairs()

◆ addSymmetryInformation()

◆ SCIP_DECL_CONSHDLRCOPY()