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-constraint. 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 <assert.h>
#include <string.h>
#include "scip/cons_and.h"
#include "scip/cons_linear.h"
#include "scip/cons_logicor.h"
#include "scip/cons_setppc.h"
#include "scip/cons_nonlinear.h"
#include "scip/cons_pseudoboolean.h"
#include "scip/pub_misc.h"
#include "scip/debug.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 131101

#define	DEFAULT_PRESOLUSEHASHING TRUE

#define	NMINCOMPARISONS 200000

#define	MINGAINPERNMINCOMPARISONS 1e-06

#define	EXPRGRAPHREFORM_PRIORITY 100000

Typedefs
typedef enum Proprule	PROPRULE

Enumerations
enum	Proprule { PROPRULE_1, PROPRULE_2, PROPRULE_3, PROPRULE_4, PROPRULE_INVALID, PROPRULE_INVALID = 0, PROPRULE_1 = 1, PROPRULE_2 = 2, PROPRULE_3 = 3, PROPRULE_4 = 4, 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, PROPRULE_2, PROPRULE_3, PROPRULE_4, PROPRULE_INVALID, 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 SCIP_RETCODE	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)

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

static	SCIP_DECL_EXPRGRAPHNODEREFORM (exprgraphnodeReformAnd)

static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyAnd)

static	SCIP_DECL_CONSFREE (consFreeAnd)

static	SCIP_DECL_CONSINITPRE (consInitpreAnd)

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_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_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_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

#define CONSHDLR_NAME "and"

Definition at line 49 of file cons_and.c.

Referenced by SCIP_DECL_CONSHDLRCOPY(), SCIPchgAndConsCheckFlagWhenUpgr(), SCIPchgAndConsRemovableFlagWhenUpgr(), SCIPcreateConsAnd(), SCIPgetNVarsAnd(), SCIPgetResultantAnd(), SCIPgetVarsAnd(), SCIPincludeConshdlrAnd(), SCIPisAndConsSorted(), and SCIPsortAndCons().

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

Definition at line 50 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_SEPAPRIORITY +850100

priority of the constraint handler for separation

Definition at line 51 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_ENFOPRIORITY -850100

priority of the constraint handler for constraint enforcing

Definition at line 52 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_CHECKPRIORITY -850100

priority of the constraint handler for checking feasibility

Definition at line 53 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_SEPAFREQ 1

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

Definition at line 54 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_PROPFREQ 1

frequency for propagating domains; zero means only preprocessing propagation

Definition at line 55 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_EAGERFREQ 100

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

Definition at line 56 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_MAXPREROUNDS -1

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

Definition at line 59 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_DELAYSEPA FALSE

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

Definition at line 60 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_DELAYPROP FALSE

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

Definition at line 61 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_NEEDSCONS TRUE

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

Definition at line 62 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_PRESOLTIMING (SCIP_PRESOLTIMING_FAST | SCIP_PRESOLTIMING_EXHAUSTIVE)

Definition at line 64 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

Definition at line 65 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define EVENTHDLR_NAME "and"

Definition at line 67 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

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

Definition at line 68 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define DEFAULT_PRESOLPAIRWISE TRUE

should pairwise constraint comparison be performed in presolving?

Definition at line 70 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define DEFAULT_LINEARIZE FALSE

should constraint get linearized and removed?

Definition at line 71 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define DEFAULT_ENFORCECUTS TRUE

should cuts be separated during LP enforcing?

Definition at line 72 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define DEFAULT_AGGRLINEARIZATION FALSE

should an aggregated linearization be used?

Definition at line 73 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define DEFAULT_UPGRRESULTANT TRUE

should all binary resultant variables be upgraded to implicit binary variables

Definition at line 74 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define DEFAULT_DUALPRESOLVING TRUE

should dual presolving be performed?

Definition at line 75 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define HASHSIZE_ANDCONS 131101

minimal size of hash table in and constraint tables

Definition at line 77 of file cons_and.c.

Referenced by detectRedundantConstraints().

#define DEFAULT_PRESOLUSEHASHING TRUE

should hash table be used for detecting redundant constraints in advance

Definition at line 78 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

#define NMINCOMPARISONS 200000

number for minimal pairwise presolving comparisons

Definition at line 79 of file cons_and.c.

Referenced by SCIP_DECL_CONSPRESOL().

#define MINGAINPERNMINCOMPARISONS 1e-06

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

Definition at line 80 of file cons_and.c.

Referenced by SCIP_DECL_CONSPRESOL().

#define EXPRGRAPHREFORM_PRIORITY 100000

priority of expression graph node reformulation method

Definition at line 81 of file cons_and.c.

Referenced by SCIPincludeConshdlrAnd().

Typedef Documentation

typedef enum Proprule PROPRULE

Definition at line 144 of file cons_and.c.

Enumeration Type Documentation

enum Proprule

Enumerator
PROPRULE_1	left hand side and bounds on z -> lower bound on x
PROPRULE_2	left hand side and upper bound on x -> bound on z
PROPRULE_3	right hand side and bounds on z -> upper bound on x
PROPRULE_4	right hand side and lower bound on x -> bound on z
PROPRULE_INVALID	propagation was applied without a specific propagation rule
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_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 136 of file cons_and.c.

Function Documentation

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	AND-constraint
var	variable of constraint entry

Definition at line 153 of file cons_and.c.

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

Referenced by addCoef().

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	AND-constraint
var	variable of constraint entry

Definition at line 167 of file cons_and.c.

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

Referenced by delCoefPos(), and lockRounding().

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 181 of file cons_and.c.

References conshdlrdataFree(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPallocMemory.

Referenced by SCIPincludeConshdlrAnd(), and unlockRounding().

static SCIP_RETCODE 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 201 of file cons_and.c.

References consdataCatchWatchedEvents(), NULL, SCIP_OKAY, and SCIPfreeMemory.

Referenced by conshdlrdataCreate(), and SCIP_DECL_CONSFREE().

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 216 of file cons_and.c.

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

Referenced by consdataSwitchWatchedvars(), and conshdlrdataFree().

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 240 of file cons_and.c.

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

Referenced by consdataCatchWatchedEvents(), and consdataSwitchWatchedvars().

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 263 of file cons_and.c.

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

Referenced by consdataCreate(), and consdataDropWatchedEvents().

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 289 of file cons_and.c.

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

Referenced by consdataCatchEvents(), and consdataFree().

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 315 of file cons_and.c.

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

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

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 375 of file cons_and.c.

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

Referenced by addCoef(), and consdataSwitchWatchedvars().

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 399 of file cons_and.c.

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

Referenced by consdataEnsureVarsSize(), SCIP_DECL_CONSTRANS(), and SCIPcreateConsAnd().

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 482 of file cons_and.c.

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

Referenced by consdataCreate(), consdataFree(), and SCIP_DECL_CONSEXITSOL().

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 513 of file cons_and.c.

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

Referenced by consdataFreeRows(), and SCIP_DECL_CONSDELETE().

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 558 of file cons_and.c.

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

Referenced by applyFixings(), consdataFree(), and SCIP_DECL_CONSPRINT().

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 583 of file cons_and.c.

References consdataEnsureVarsSize(), delCoefPos(), 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(), and consdataPrint().

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 643 of file cons_and.c.

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

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

static void consdataSort ( SCIP_CONSDATA * consdata )

static

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

Parameters

consdata constraint data

Definition at line 706 of file cons_and.c.

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

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

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 787 of file cons_and.c.

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

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

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 887 of file cons_and.c.

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

Referenced by addRelaxation(), applyFixings(), and separateCons().

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

static

adds linear relaxation of AND-constraint to the LP

Parameters

scip	SCIP data structure
cons	constraint to check

Definition at line 934 of file cons_and.c.

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

Referenced by createRelaxation(), and SCIP_DECL_CONSINITLP().

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 992 of file cons_and.c.

References FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_REAL_FORMAT, SCIP_VARTYPE_IMPLINT, SCIPconsGetData(), SCIPgetSolVal(), SCIPincConsAge(), SCIPinfoMessage(), SCIPisFeasIntegral(), SCIPprintCons(), SCIPresetConsAge(), SCIProwIsInLP(), SCIPvarGetName(), SCIPvarGetType(), separateCons(), and TRUE.

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

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 1105 of file cons_and.c.

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

Referenced by checkCons(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSSEPALP(), and SCIP_DECL_CONSSEPASOL().

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 1154 of file cons_and.c.

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

Referenced by consdataFixOperandsOne(), consdataFixResultantZero(), and separateCons().

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 1185 of file cons_and.c.

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

Referenced by analyzeConflictOne(), analyzeZeroResultant(), and propagateCons().

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 1220 of file cons_and.c.

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

Referenced by analyzeConflictZero(), and propagateCons().

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 1259 of file cons_and.c.

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

Referenced by consdataFixResultantZero(), and propagateCons().

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 1313 of file cons_and.c.

References analyzeZeroResultant(), 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 consdataFixOperandsOne(), and propagateCons().

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 1424 of file cons_and.c.

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

Referenced by consdataLinearize(), and propagateCons().

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 1485 of file cons_and.c.

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

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

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 1642 of file cons_and.c.

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

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

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 1847 of file cons_and.c.

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

Referenced by propagateCons(), and SCIP_DECL_CONSRESPROP().

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 1933 of file cons_and.c.

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

Referenced by resolvePropagation(), and SCIP_DECL_CONSPRESOL().

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 2568 of file cons_and.c.

References BMSclearMemoryArray, delCoefPos(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_HASHGETKEY(), 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(), SCIPdebugMessage, SCIPdebugPrintCons, SCIPdelCons(), SCIPfixVar(), SCIPfreeBufferArray, SCIPgetNegatedVar(), SCIPreleaseCons(), SCIPsnprintf(), SCIPvarGetLbGlobal(), SCIPvarGetName(), SCIPvarGetNegatedVar(), SCIPvarGetProbvarBinary(), SCIPvarGetStatus(), SCIPvarGetUbGlobal(), SCIPvarsHaveCommonClique(), and TRUE.

Referenced by dualPresolve(), and SCIP_DECL_CONSPRESOL().

static SCIP_DECL_HASHGETKEY ( hashGetKeyAndcons )

static

gets the key of the given element

Definition at line 3217 of file cons_and.c.

References SCIP_DECL_HASHKEYEQ().

Referenced by cliquePresolve().

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 3225 of file cons_and.c.

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

Referenced by SCIP_DECL_HASHGETKEY().

static SCIP_DECL_HASHKEYVAL ( hashKeyValAndcons )

static

returns the hash value of the key

Definition at line 3271 of file cons_and.c.

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

Referenced by SCIP_DECL_HASHKEYEQ().

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 3298 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSPRESOL(), and SCIP_DECL_HASHKEYVAL().

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 3419 of file cons_and.c.

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

Referenced by detectRedundantConstraints(), and SCIP_DECL_CONSPRESOL().

static SCIP_DECL_EXPRGRAPHNODEREFORM ( exprgraphnodeReformAnd )

static

tries to reformulate an expression graph node that is a product of binary variables via introducing an AND-constraint

Definition at line 3623 of file cons_and.c.

References FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSHDLRCOPY(), SCIP_EXPR_POLYNOMIAL, SCIP_EXPR_PRODUCT, SCIP_EXPR_VARIDX, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_BINARY, SCIPaddCons(), SCIPaddVar(), SCIPallocBufferArray, SCIPblkmem(), SCIPcreateConsAnd(), SCIPcreateVar(), SCIPdebugAddSolVal, SCIPdebugGetSolVal, SCIPdebugMessage, SCIPdebugPrintCons, SCIPexprGetMonomialCoef(), SCIPexprGetMonomialNFactors(), SCIPexprgraphAddNode(), SCIPexprgraphAddVars(), SCIPexprgraphCreateNodeLinear(), SCIPexprgraphGetNodeChildren(), SCIPexprgraphGetNodeNChildren(), SCIPexprgraphGetNodeOperator(), SCIPexprgraphGetNodePolynomialConstant(), SCIPexprgraphGetNodePolynomialMonomials(), SCIPexprgraphGetNodePolynomialNMonomials(), SCIPexprgraphGetNodeVar(), SCIPfreeBufferArray, SCIPreleaseCons(), SCIPreleaseVar(), SCIPsnprintf(), SCIPvarIsBinary(), and TRUE.

Referenced by preprocessConstraintPairs().

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyAnd )

static

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

Definition at line 3748 of file cons_and.c.

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

Referenced by SCIP_DECL_EXPRGRAPHNODEREFORM().

static SCIP_DECL_CONSFREE ( consFreeAnd )

static

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

Definition at line 3764 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSHDLRCOPY().

static SCIP_DECL_CONSINITPRE ( consInitpreAnd )

static

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

Definition at line 3782 of file cons_and.c.

References HASHTABLESIZE_FACTOR, NULL, SCIP_CALL, SCIP_DECL_CONSEXITPRE, SCIP_DECL_CONSEXITSOL(), SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_WRITEERROR, SCIPABORT, SCIPaddCons(), SCIPallocBufferArray, SCIPblkmem(), SCIPcalcHashtableSize(), SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsActive(), SCIPconsIsAdded(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsLinear(), SCIPdelCons(), SCIPduplicateBufferArray, SCIPerrorMessage, SCIPfreeBufferArray, SCIPgetNVars(), SCIPgetVarsData(), SCIPgmlWriteArc(), SCIPgmlWriteClosing(), SCIPgmlWriteNode(), SCIPgmlWriteOpening(), SCIPhashmapCreate(), SCIPhashmapFree(), SCIPhashmapGetImage(), SCIPhashmapInsert(), SCIPinfinity(), SCIPreallocBufferArray, SCIPreleaseCons(), SCIPsnprintf(), SCIPvarGetName(), SCIPvarGetProbvar(), SCIPvarsGetProbvar(), and TRUE.

Referenced by SCIP_DECL_CONSFREE().

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 4064 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSINITPRE().

static SCIP_DECL_CONSDELETE ( consDeleteAnd )

static

frees specific constraint data

Definition at line 4084 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSEXITSOL().

static SCIP_DECL_CONSTRANS ( consTransAnd )

static

transforms constraint data into data belonging to the transformed problem

Definition at line 4099 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSDELETE().

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 4129 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSTRANS().

static SCIP_DECL_CONSSEPALP ( consSepalpAnd )

static

separation method of constraint handler for LP solutions

Definition at line 4145 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSINITLP().

static SCIP_DECL_CONSSEPASOL ( consSepasolAnd )

static

separation method of constraint handler for arbitrary primal solutions

Definition at line 4172 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSSEPALP().

static SCIP_DECL_CONSENFOLP ( consEnfolpAnd )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 4199 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSSEPASOL().

static SCIP_DECL_CONSENFOPS ( consEnfopsAnd )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 4261 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSENFOLP().

static SCIP_DECL_CONSCHECK ( consCheckAnd )

static

feasibility check method of constraint handler for integral solutions

Definition at line 4284 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSENFOPS().

static SCIP_DECL_CONSPROP ( consPropAnd )

static

domain propagation method of constraint handler

Definition at line 4307 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSCHECK().

static SCIP_DECL_CONSPRESOL ( consPresolAnd )

static

presolving method of constraint handler

Definition at line 4342 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_DECL_CONSRESPROP(), SCIP_DIDNOTFIND, SCIP_Longint, SCIP_OKAY, SCIP_PRESOLTIMING_EXHAUSTIVE, SCIP_Real, SCIP_SUCCESS, SCIPaddVarImplication(), SCIPaggregateVars(), SCIPallocBufferArray, SCIPallowDualReds(), SCIPblkmem(), SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsActive(), SCIPconsIsDeleted(), SCIPconsIsModifiable(), SCIPdebugMessage, SCIPdelCons(), SCIPdoNotAggr(), SCIPfreeBufferArray, SCIPgetNContVars(), SCIPgetNVars(), SCIPisFeasEQ(), SCIPisStopped(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), and TRUE.

Referenced by SCIP_DECL_CONSPROP().

static SCIP_DECL_CONSRESPROP ( consRespropAnd )

static

propagation conflict resolving method of constraint handler

Definition at line 4553 of file cons_and.c.

References resolvePropagation(), SCIP_CALL, SCIP_DECL_CONSLOCK(), and SCIP_OKAY.

Referenced by SCIP_DECL_CONSPRESOL().

static SCIP_DECL_CONSLOCK ( consLockAnd )

static

variable rounding lock method of constraint handler

Definition at line 4563 of file cons_and.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSPRINT(), SCIP_OKAY, SCIPaddVarLocks(), and SCIPconsGetData().

Referenced by SCIP_DECL_CONSRESPROP().

static SCIP_DECL_CONSPRINT ( consPrintAnd )

static

constraint display method of constraint handler

Definition at line 4586 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSLOCK().

static SCIP_DECL_CONSCOPY ( consCopyAnd )

static

constraint copying method of constraint handler

Definition at line 4600 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSPRINT().

static SCIP_DECL_CONSPARSE ( consParseAnd )

static

constraint parsing method of constraint handler

Definition at line 4658 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSCOPY().

static SCIP_DECL_CONSGETVARS ( consGetVarsAnd )

static

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

Definition at line 4766 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSPARSE().

static SCIP_DECL_CONSGETNVARS ( consGetNVarsAnd )

static

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

Definition at line 4787 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSGETVARS().

static SCIP_DECL_EVENTEXEC ( eventExecAnd )

static

Definition at line 4808 of file cons_and.c.

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

Referenced by SCIP_DECL_CONSGETNVARS().

SCIP_RETCODE SCIPincludeConshdlrAnd ( SCIP * scip )

creates the handler for AND-constraints and includes it in SCIP

Parameters

scip	SCIP data structure

Definition at line 4834 of file cons_and.c.

References CONSHDLR_CHECKPRIORITY, CONSHDLR_DELAYPROP, CONSHDLR_DELAYSEPA, CONSHDLR_DESC, CONSHDLR_EAGERFREQ, CONSHDLR_ENFOPRIORITY, CONSHDLR_MAXPREROUNDS, CONSHDLR_NAME, CONSHDLR_NEEDSCONS, CONSHDLR_PRESOLTIMING, CONSHDLR_PROP_TIMING, CONSHDLR_PROPFREQ, CONSHDLR_SEPAFREQ, CONSHDLR_SEPAPRIORITY, conshdlrdataCreate(), DEFAULT_AGGRLINEARIZATION, DEFAULT_DUALPRESOLVING, DEFAULT_ENFORCECUTS, DEFAULT_LINEARIZE, DEFAULT_PRESOLPAIRWISE, DEFAULT_PRESOLUSEHASHING, DEFAULT_UPGRRESULTANT, EVENTHDLR_DESC, EVENTHDLR_NAME, EXPRGRAPHREFORM_PRIORITY, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddBoolParam(), SCIPcreateConsAnd(), SCIPfindConshdlr(), SCIPincludeConshdlrBasic(), SCIPincludeEventhdlrBasic(), SCIPincludeNonlinconsUpgrade(), SCIPsetConshdlrCopy(), SCIPsetConshdlrDelete(), SCIPsetConshdlrExitpre(), SCIPsetConshdlrExitsol(), SCIPsetConshdlrFree(), SCIPsetConshdlrGetNVars(), SCIPsetConshdlrGetVars(), SCIPsetConshdlrInitlp(), SCIPsetConshdlrInitpre(), SCIPsetConshdlrParse(), SCIPsetConshdlrPresol(), SCIPsetConshdlrPrint(), SCIPsetConshdlrProp(), SCIPsetConshdlrResprop(), SCIPsetConshdlrSepa(), SCIPsetConshdlrTrans(), and TRUE.

Referenced by SCIP_DECL_CONSHDLRCOPY(), SCIP_DECL_EVENTEXEC(), and SCIPincludeDefaultPlugins().

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
	)

creates and captures a AND-constraint

Note: the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

Parameters

scip	SCIP data structure
cons	pointer to hold the created constraint
name	name of constraint
resvar	resultant variable of the operation
nvars	number of operator variables in the constraint
vars	array with operator variables of constraint
initial	should the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separate	should the constraint be separated during LP processing? Usually set to TRUE.
enforce	should the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
check	should the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagate	should the constraint be propagated during node processing? Usually set to TRUE.
local	is constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiable	is constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamic	is constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removable	should the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnode	should the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 4922 of file cons_and.c.

References ARTIFICIALVARNAMEPREFIX, consdataCreate(), CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_IMPLINT, SCIPchgVarType(), SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicAnd(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPisTransformed(), SCIPvarGetName(), SCIPvarGetProbvar(), and SCIPvarGetType().

Referenced by CREATE_CONSTRAINT(), createAndAddAndCons(), extractGates(), findAggregation(), presolveTryAddAND(), presolveTryAddLinearReform(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIP_DECL_EXPRGRAPHNODEREFORM(), SCIPcreateConsBasicAnd(), SCIPincludeConshdlrAnd(), setObjective(), and upgradeCons().

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

creates and captures an AND-constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsAnd(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also: SCIPcreateConsAnd() for information about the basic constraint flag configuration

Note: the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

Parameters

scip	SCIP data structure
cons	pointer to hold the created constraint
name	name of constraint
resvar	resultant variable of the operation
nvars	number of operator variables in the constraint
vars	array with operator variables of constraint

Definition at line 5032 of file cons_and.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsAnd(), SCIPgetNVarsAnd(), and TRUE.

Referenced by SCIPcreateConsAnd().

int SCIPgetNVarsAnd	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

gets number of variables in AND-constraint

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 5051 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsAnd().

Referenced by checkAndConss(), checkOrigPbCons(), chgLhs(), chgRhs(), computeAndConstraintInfos(), computeConsAndDataChanges(), consdataFree(), consdataPrint(), countNonlinearities(), createCoveringProblem(), printAndCons(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSGETNVARS(), SCIP_DECL_CONSGETVARS(), SCIP_DECL_READERWRITE(), SCIPcreateConsBasicAnd(), SCIPcreateConsPseudobooleanWithConss(), SCIPwritePip(), transformToOrig(), and writeOpbConstraints().

SCIP_VAR** SCIPgetVarsAnd	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

gets array of variables in AND-constraint

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 5075 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetResultantAnd().

Referenced by checkAndConss(), checkOrigPbCons(), chgLhs(), chgRhs(), computeAndConstraintInfos(), computeConsAndDataChanges(), consdataFree(), consdataPrint(), countNonlinearities(), createCoveringProblem(), printAndCons(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSGETVARS(), SCIP_DECL_READERWRITE(), SCIPcreateConsPseudobooleanWithConss(), SCIPgetNVarsAnd(), SCIPwritePip(), transformToOrig(), and writeOpbConstraints().

SCIP_VAR* SCIPgetResultantAnd	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

gets the resultant variable in AND-constraint

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 5100 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIP_Bool, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPisAndConsSorted().

Referenced by addCliques(), addCoefTerm(), checkAndConss(), checkOrigPbCons(), computeAndConstraintInfos(), consdataCreate(), consdataFree(), correctConshdlrdata(), correctLocksAndCaptures(), countNonlinearities(), createAndAddAndCons(), createCoveringProblem(), getLinVarsAndAndRess(), lockRoundingAndCons(), printAndCons(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSINIT(), SCIP_DECL_CONSLOCK(), SCIP_DECL_READERWRITE(), SCIP_DECL_SORTPTRCOMP(), SCIPcreateConsPseudoboolean(), SCIPcreateConsPseudobooleanWithConss(), SCIPgetVarsAnd(), SCIPwritePip(), transformToOrig(), tryUpgradingSetppc(), unlockRoundingAndCons(), and updateConsanddataUses().

SCIP_Bool SCIPisAndConsSorted	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

return if the variables of the AND-constraint are sorted due to their indices

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 5123 of file cons_and.c.

References CONSHDLR_NAME, FALSE, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPsortAndCons().

Referenced by computeConsAndDataChanges(), and SCIPgetResultantAnd().

SCIP_RETCODE SCIPsortAndCons	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

sort the variables of the AND-constraint due to their indices

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 5147 of file cons_and.c.

References consdataSort(), CONSHDLR_NAME, NULL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPchgAndConsCheckFlagWhenUpgr(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by computeConsAndDataChanges(), and SCIPisAndConsSorted().

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

when 'upgrading' the given AND-constraint, should the check flag for the upgraded constraint be set to TRUE, even if the check flag of this AND-constraint is set to FALSE?

Parameters

scip	SCIP data structure
cons	constraint data
flag	should an arising constraint from the given AND-constraint be checked, even if the check flag of the AND-constraint is set to FALSE

Definition at line 5176 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPchgAndConsRemovableFlagWhenUpgr(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by createAndAddAndCons(), and SCIPsortAndCons().

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

when 'upgrading' the given AND-constraint, should the removable flag for the upgraded constraint be set to FALSE, even if the removable flag of this AND-constraint is set to TRUE?

Parameters

scip	SCIP data structure
cons	constraint data
flag	should an arising constraint from the given AND-constraint be not removable, even if the removable flag of the AND-constraint is set to TRUE

Definition at line 5207 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by createAndAddAndCons(), and SCIPchgAndConsCheckFlagWhenUpgr().

SCIP

Detailed Description

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation