Detailed Description

constraint handler for conjunction constraints

Author: Tobias Achterberg

#include <assert.h>
#include <string.h>
#include <limits.h>
#include "scip/cons_conjunction.h"

Macros
#define	CONSHDLR_NAME "conjunction"

#define	CONSHDLR_DESC "conjunction of constraints"

#define	CONSHDLR_ENFOPRIORITY +900000

#define	CONSHDLR_CHECKPRIORITY -900000

#define	CONSHDLR_EAGERFREQ 100

#define	CONSHDLR_MAXPREROUNDS -1

#define	CONSHDLR_NEEDSCONS TRUE

#define	CONSHDLR_PRESOLTIMING SCIP_PRESOLTIMING_FAST

Functions
static SCIP_RETCODE	consdataCreate (SCIP scip, SCIP_CONSDATA consdata, SCIP_CONS *conss, int nconss)

static SCIP_RETCODE	consdataFree (SCIP scip, SCIP_CONSDATA *consdata)

static SCIP_RETCODE	consdataAddCons (SCIP scip, SCIP_CONSDATA consdata, SCIP_CONS *cons)

static SCIP_RETCODE	addAllConss (SCIP scip, SCIP_CONS conss, int nconss, SCIP_RESULT result)

static SCIP_RETCODE	checkAllConss (SCIP scip, SCIP_CONS conss, int nconss, SCIP_SOL sol, SCIP_Bool checkintegrality, SCIP_Bool checklprows, SCIP_Bool printreason, SCIP_Bool completely, SCIP_RESULT *result)

static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyConjunction)

static	SCIP_DECL_CONSDELETE (consDeleteConjunction)

static	SCIP_DECL_CONSTRANS (consTransConjunction)

static	SCIP_DECL_CONSENFOLP (consEnfolpConjunction)

static	SCIP_DECL_CONSENFORELAX (consEnforelaxConjunction)

static	SCIP_DECL_CONSENFOPS (consEnfopsConjunction)

static	SCIP_DECL_CONSCHECK (consCheckConjunction)

static	SCIP_DECL_CONSPRESOL (consPresolConjunction)

static	SCIP_DECL_CONSLOCK (consLockConjunction)

static	SCIP_DECL_CONSPRINT (consPrintConjunction)

static	SCIP_DECL_CONSPARSE (consParseConjunction)

static	SCIP_DECL_CONSCOPY (consCopyConjunction)

SCIP_RETCODE	SCIPincludeConshdlrConjunction (SCIP *scip)

SCIP_RETCODE	SCIPcreateConsConjunction (SCIP scip, SCIP_CONS cons, const char name, int nconss, SCIP_CONS **conss, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic)

SCIP_RETCODE	SCIPcreateConsBasicConjunction (SCIP scip, SCIP_CONS cons, const char name, int nconss, SCIP_CONS **conss)

SCIP_RETCODE	SCIPaddConsElemConjunction (SCIP scip, SCIP_CONS cons, SCIP_CONS *addcons)

Macro Definition Documentation

◆ CONSHDLR_NAME

#define CONSHDLR_NAME "conjunction"

Definition at line 31 of file cons_conjunction.c.

Referenced by SCIP_DECL_CONSHDLRCOPY(), SCIPaddConsElemConjunction(), SCIPcreateConsConjunction(), and SCIPincludeConshdlrConjunction().

◆ CONSHDLR_DESC

#define CONSHDLR_DESC "conjunction of constraints"

Definition at line 32 of file cons_conjunction.c.

Referenced by SCIPincludeConshdlrConjunction().

◆ CONSHDLR_ENFOPRIORITY

#define CONSHDLR_ENFOPRIORITY +900000

priority of the constraint handler for constraint enforcing

Definition at line 33 of file cons_conjunction.c.

Referenced by SCIPincludeConshdlrConjunction().

◆ CONSHDLR_CHECKPRIORITY

#define CONSHDLR_CHECKPRIORITY -900000

priority of the constraint handler for checking feasibility

Definition at line 34 of file cons_conjunction.c.

Referenced by SCIPincludeConshdlrConjunction().

◆ 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 35 of file cons_conjunction.c.

Referenced by SCIPincludeConshdlrConjunction().

◆ CONSHDLR_MAXPREROUNDS

#define CONSHDLR_MAXPREROUNDS -1

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

Definition at line 38 of file cons_conjunction.c.

Referenced by SCIPincludeConshdlrConjunction().

◆ CONSHDLR_NEEDSCONS

#define CONSHDLR_NEEDSCONS TRUE

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

Definition at line 39 of file cons_conjunction.c.

Referenced by SCIPincludeConshdlrConjunction().

◆ CONSHDLR_PRESOLTIMING

#define CONSHDLR_PRESOLTIMING SCIP_PRESOLTIMING_FAST

Definition at line 41 of file cons_conjunction.c.

Referenced by SCIPincludeConshdlrConjunction().

Function Documentation

◆ consdataCreate()

static SCIP_RETCODE consdataCreate	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata,
		SCIP_CONS **	conss,
		int	nconss
	)

static

creates conjunction constraint data, captures initial constraints of conjunction

Parameters

scip	SCIP data structure
consdata	pointer to constraint data
conss	initial constraint in conjunction
nconss	number of initial constraints in conjunction

Definition at line 62 of file cons_conjunction.c.

References consdataFree(), SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemory, SCIPcaptureCons(), SCIPduplicateBlockMemoryArray, SCIPisTransformed(), and SCIPtransformConss().

Referenced by SCIPcreateConsConjunction().

◆ consdataFree()

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

static

frees constraint data and releases all constraints in conjunction

Parameters

scip	SCIP data structure
consdata	pointer to constraint data

Definition at line 104 of file cons_conjunction.c.

References consdataAddCons(), SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemory, SCIPfreeBlockMemoryArrayNull, and SCIPreleaseCons().

Referenced by consdataCreate(), and SCIP_DECL_CONSDELETE().

◆ consdataAddCons()

static SCIP_RETCODE consdataAddCons	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_CONS *	cons
	)

static

adds constraint to conjunction

Parameters

scip	SCIP data structure
consdata	constraint data
cons	constraint to add to the conjunction

Definition at line 129 of file cons_conjunction.c.

References addAllConss(), SCIP_CALL, SCIP_OKAY, SCIPcaptureCons(), SCIPensureBlockMemoryArray, SCIPisTransformed(), and SCIPtransformCons().

Referenced by consdataFree(), and SCIPaddConsElemConjunction().

◆ addAllConss()

static SCIP_RETCODE addAllConss	(	SCIP *	scip,
		SCIP_CONS **	conss,
		int	nconss,
		SCIP_RESULT *	result
	)

static

adds all constraints in conjunction constraints to the problem; disables unmodifiable conjunction constraints

Parameters

scip	SCIP data structure
conss	active conjunction constraints
nconss	number of active conjunction constraints
result	pointer to store the result

Definition at line 161 of file cons_conjunction.c.

References checkAllConss(), SCIP_CALL, SCIP_CONSADDED, SCIP_OKAY, SCIPaddConsLocal(), SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsActive(), SCIPconsIsChecked(), SCIPconsIsModifiable(), SCIPdebugMsg, SCIPdelConsLocal(), SCIPsetConsChecked(), and TRUE.

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

◆ checkAllConss()

static SCIP_RETCODE checkAllConss	(	SCIP *	scip,
		SCIP_CONS **	conss,
		int	nconss,
		SCIP_SOL *	sol,
		SCIP_Bool	checkintegrality,
		SCIP_Bool	checklprows,
		SCIP_Bool	printreason,
		SCIP_Bool	completely,
		SCIP_RESULT *	result
	)

static

checks all constraints in conjunction constraints for feasibility

Parameters

scip	SCIP data structure
conss	active conjunction constraints
nconss	number of active conjunction constraints
sol	solution to check
checkintegrality	Has integrality to be checked?
checklprows	Do constraints represented by rows in the current LP have to be checked?
printreason	Should the reason for the violation be printed?
completely	Should all violations be checked?
result	pointer to store the result