cons_optcumulative.c File Reference

Detailed Description

constraint handler for cumulative constraints with optional activities

Author

Chris Beck

Stefan Heinz

Given a set of jobs \(J\). Each job~ \(j\) has a binary variables \(x_j\) which is one if this job is scheduled on that machine (otherwise it is zero), an integer start time variables \(S_j\), a processing time \(p_j\), and a demands \(d_j\). Besides that an integer resource capacity \(C\).

The optcumulative enfoces the cumulative conditions for those jobs which are assigned to that machine. Let \(J'\) be the subset of jobs assigned to that optcumulative constraint, then the cumulative constraint ensures that for each point in time \(t\) \(\sum_{j\in J': S_j \leq t < S_j + p_j} d_j \leq C\) holds.

Propagation:

LP Relaxation:

• let est(J) the earliest start time of all jobs of set \(J\) and lct(J) the latest completion time for all jobs of set \(J\), then the following linear constraint has to hold \(\sum_{j\in J} p_j \cdot d_j \leq (lct(J) - est(J)) \cdot C\)

Definition in file cons_optcumulative.c.

#include <assert.h>
#include <string.h>
#include "cons_optcumulative.h"
#include "scip/cons_cumulative.h"
#include "scip/cons_knapsack.h"
#include "scip/scipdefplugins.h"

Go to the source code of this file.

Macros
#define	consInitOptcumulative   NULL
#define	consExitOptcumulative   NULL
#define	consExitpreOptcumulative   NULL
#define	consInitsolOptcumulative   NULL
#define	consEnforelaxOptcomulative   NULL
#define	consSepasolOptcumulative   NULL
#define	consActiveOptcumulative   NULL
#define	consDeactiveOptcumulative   NULL
#define	consEnableOptcumulative   NULL
#define	consDisableOptcumulative   NULL
#define	consDelvarsOptcumulative   NULL
#define	consParseOptcumulative   NULL
Constraint handler properties
#define	CONSHDLR_NAME   "optcumulative"
#define	CONSHDLR_DESC   "constraint handler for cumulative constraints with optional activities"
#define	CONSHDLR_SEPAPRIORITY   0
#define	CONSHDLR_ENFOPRIORITY   -2060000
#define	CONSHDLR_CHECKPRIORITY   -3100000
#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_PROP_TIMING   SCIP_PROPTIMING_BEFORELP
#define	CONSHDLR_PRESOLTIMING   SCIP_PRESOLTIMING_MEDIUM
Event handler properties
#define	EVENTHDLR_BINVARS_NAME   "optcumulativebinvars"
#define	EVENTHDLR_BINVARS_DESC   "bound change event handler for binary variables of optcumulative constraints"
#define	EVENTHDLR_INTVARS_NAME   "optcumulativeintvars"
#define	EVENTHDLR_INTVARS_DESC   "bound change event handler for integer variables of optcumulative constraints"
Default parameter values
#define	DEFAULT_ROWRELAX   FALSE
#define	DEFAULT_CONFLICTANALYSIS   TRUE
#define	DEFAULT_INTERVALRELAX   TRUE

Functions
static SCIP_RETCODE	unlockRounding (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *binvar, SCIP_VAR *var, SCIP_Bool downlock, SCIP_Bool uplock)
static SCIP_RETCODE	catchEventBinvar (SCIP *scip, SCIP_CONS *cons, SCIP_EVENTHDLR *eventhdlr, int pos)
static SCIP_RETCODE	dropEventBinvar (SCIP *scip, SCIP_CONS *cons, SCIP_EVENTHDLR *eventhdlr, int pos)
static SCIP_RETCODE	catchEventIntvar (SCIP *scip, SCIP_CONS *cons, SCIP_EVENTHDLR *eventhdlr, int pos)
static SCIP_RETCODE	dropEventIntvar (SCIP *scip, SCIP_CONS *cons, SCIP_EVENTHDLR *eventhdlr, int pos)
static SCIP_RETCODE	catchAllEvents (SCIP *scip, SCIP_CONS *cons, SCIP_EVENTHDLR *eventhdlrbinvars, SCIP_EVENTHDLR *eventhdlrintvars)
static SCIP_RETCODE	dropAllEvents (SCIP *scip, SCIP_CONS *cons, SCIP_EVENTHDLR *eventhdlrbinvars, SCIP_EVENTHDLR *eventhdlrintvars)
static void	createSortedEventpoints (SCIP *scip, SCIP_CONSDATA *consdata, int *starttimes, int *endtimes, int *startindices, int *endindices, SCIP_Bool local)
static SCIP_Longint	computeMaxEnergy (SCIP *scip, SCIP_CONSDATA *consdata, int starttime, int endtime)
static SCIP_RETCODE	collectVars (SCIP *scip, SCIP_CONSDATA *consdata, SCIP_VAR **vars, SCIP_Longint *weights, int *nvars, int starttime, int endtime)
static int	removeRedundantRows (SCIP_Longint *rowtightness, int *startidxs, int nrows, SCIP_Longint tightness)
static SCIP_RETCODE	createRow (SCIP *scip, SCIP_CONSHDLR *conshdlr, const char *name, SCIP_VAR **vars, SCIP_Longint *weights, int nvars, SCIP_Longint capacity, SCIP_Bool local, SCIP_Bool *rowadded, SCIP_Bool *consadded, SCIP_Bool *cutoff)
static SCIP_RETCODE	addRelaxation (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_CONSHDLRDATA *conshdlrdata, SCIP_CONS *cons, SCIP_Bool *rowadded, SCIP_Bool *consadded, SCIP_Bool *cutoff)
static void	collectActivities (SCIP_CONSDATA *consdata, SCIP_VAR **binvars, SCIP_VAR **vars, int *durations, int *demands, int *nfixedones, int *nfixedzeros, SCIP_Bool *auxiliary)
static void	collectSolActivities (SCIP *scip, SCIP_CONSDATA *consdata, SCIP_SOL *sol, SCIP_VAR **binvars, SCIP_VAR **vars, int *durations, int *demands, int *nvars, int *nfixedones, int *nfixedzeros, SCIP_Bool *auxiliary)
static SCIP_RETCODE	solveCumulative (SCIP *scip, int nvars, SCIP_VAR **vars, int *durations, int *demands, int capacity, int hmin, int hmax, SCIP_Bool local, SCIP_Real *ests, SCIP_Real *lsts, SCIP_Longint maxnodes, SCIP_Bool *solved, SCIP_Bool *infeasible, SCIP_Bool *unbounded, SCIP_Bool *error)
static SCIP_RETCODE	createConflictCons (SCIP *scip, const char *name, SCIP_VAR **binvars, int nvars)
static SCIP_RETCODE	checkRedundancy (SCIP *scip, SCIP_CONS *cons, int *ndelconss, SCIP_Bool *redundant)
static SCIP_RETCODE	solveSubproblem (SCIP *scip, SCIP_CONS *cons, SCIP_Bool conflictanalysis, SCIP_CONSDATA *consdata, SCIP_VAR **binvars, SCIP_VAR **vars, int *durations, int *demands, int nvars, int *nfixedvars, int *nchgbds, int *ndelconss, SCIP_Bool *cutoff)
static SCIP_RETCODE	checkCons (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *sol, SCIP_Bool *violated, SCIP_Bool printreason)
static SCIP_RETCODE	enfopsCons (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *trysol, SCIP_Bool *violated, SCIP_Bool *consadded, SCIP_Bool *solfeasible)
static SCIP_RETCODE	upgradeCons (SCIP *scip, SCIP_CONS *cons, int *ndelconss, int *nupgdconss, SCIP_Bool *mustpropagate)
static SCIP_RETCODE	fixIntegerVariable (SCIP *scip, SCIP_VAR *var, SCIP_Bool downlock, SCIP_Bool uplock, int *nchgbds)
static SCIP_RETCODE	consdataDeletePos (SCIP *scip, SCIP_CONSDATA *consdata, SCIP_CONS *cons, int pos)
static SCIP_RETCODE	applyZeroFixings (SCIP *scip, SCIP_CONS *cons, int *nchgcoefs, int *nchgbds)
static SCIP_RETCODE	removeIrrelevantJobs (SCIP *scip, SCIP_CONS *cons)
static SCIP_RETCODE	presolveCumulativeCondition (SCIP *scip, SCIP_CONS *cons, int *nfixedvars, int *nchgcoefs, int *nchgsides, SCIP_Bool *cutoff)
static SCIP_RETCODE	createSetPackingCons (SCIP *scip, SCIP_VAR *var1, SCIP_VAR *var2)
static SCIP_RETCODE	createVarboundCons (SCIP *scip, SCIP_VAR *binvar, SCIP_VAR *intvar, int bound, SCIP_Bool lower)
static SCIP_RETCODE	createBounddisjunctionCons (SCIP *scip, SCIP_VAR *binvar, SCIP_VAR *intvar, int lb, int ub)
static SCIP_RETCODE	detectImplications (SCIP *scip, SCIP_CONS *cons, int *nchgcoefs, int *naddconss)
static SCIP_RETCODE	propagateCons (SCIP *scip, SCIP_CONS *cons, SCIP_Bool conflictanalysis, int *nfixedvars, int *nchgbds, int *ndelconss, SCIP_Bool *cutoff)
static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyOptcumulative)
static	SCIP_DECL_CONSFREE (consFreeOptcumulative)
static	SCIP_DECL_CONSINITPRE (consInitpreOptcumulative)
static	SCIP_DECL_CONSEXITSOL (consExitsolOptcumulative)
static	SCIP_DECL_CONSDELETE (consDeleteOptcumulative)
static	SCIP_DECL_CONSTRANS (consTransOptcumulative)
static	SCIP_DECL_CONSINITLP (consInitlpOptcumulative)
static	SCIP_DECL_CONSSEPALP (consSepalpOptcumulative)
static	SCIP_DECL_CONSENFOLP (consEnfolpOptcumulative)
static	SCIP_DECL_CONSENFOPS (consEnfopsOptcumulative)
static	SCIP_DECL_CONSCHECK (consCheckOptcumulative)
static	SCIP_DECL_CONSPROP (consPropOptcumulative)
static	SCIP_DECL_CONSPRESOL (consPresolOptcumulative)
static	SCIP_DECL_CONSRESPROP (consRespropOptcumulative)
static	SCIP_DECL_CONSLOCK (consLockOptcumulative)
static	SCIP_DECL_CONSPRINT (consPrintOptcumulative)
static	SCIP_DECL_CONSCOPY (consCopyOptcumulative)
static	SCIP_DECL_EVENTEXEC (eventExecOptcumulativeBinvars)
static	SCIP_DECL_EVENTEXEC (eventExecOptcumulativeIntvars)
SCIP_RETCODE	SCIPincludeConshdlrOptcumulative (SCIP *scip)
SCIP_RETCODE	SCIPcreateConsOptcumulative (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_VAR **binvars, int *durations, int *demands, int capacity, 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)
Debug Methods
static void	checkCounters (SCIP_CONSDATA *consdata)
Miscellaneous Methods
static int	convertBoundToInt (SCIP *scip, SCIP_Real bound)
Constraint data methods
static SCIP_RETCODE	consdataCreate (SCIP *scip, SCIP_CONSDATA **consdata, int nvars, SCIP_VAR **vars, SCIP_VAR **binvars, int *durations, int *demands, int capacity, SCIP_Bool check)
static SCIP_RETCODE	consdataFree (SCIP *scip, SCIP_CONSDATA **consdata)
static SCIP_RETCODE	consdataPrint (SCIP *scip, SCIP_CONSDATA *consdata, FILE *file)
Constraint handler data
Method used to create and free the constraint handler data when including and removing the cumulative constraint handler.
static SCIP_RETCODE	conshdlrdataCreate (SCIP *scip, SCIP_CONSHDLRDATA **conshdlrdata, SCIP_EVENTHDLR *eventhdlrbinvars, SCIP_EVENTHDLR *eventhdlrintvars)
static SCIP_RETCODE	conshdlrdataFree (SCIP *scip, SCIP_CONSHDLRDATA **conshdlrdata)

Macro Definition Documentation

CONSHDLR_NAME

#define CONSHDLR_NAME   "optcumulative"

Definition at line 69 of file cons_optcumulative.c.

Referenced by SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSDELETE(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSENFOPS(), SCIP_DECL_CONSHDLRCOPY(), SCIP_DECL_CONSINITPRE(), SCIPcreateConsOptcumulative(), and SCIPincludeConshdlrOptcumulative().

CONSHDLR_DESC

#define CONSHDLR_DESC   "constraint handler for cumulative constraints with optional activities"

Definition at line 70 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_SEPAPRIORITY

#define CONSHDLR_SEPAPRIORITY   0

priority of the constraint handler for separation

Definition at line 71 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_ENFOPRIORITY

#define CONSHDLR_ENFOPRIORITY   -2060000

priority of the constraint handler for constraint enforcing

Definition at line 72 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_CHECKPRIORITY

#define CONSHDLR_CHECKPRIORITY   -3100000

priority of the constraint handler for checking feasibility

Definition at line 73 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_SEPAFREQ

#define CONSHDLR_SEPAFREQ   1

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

Definition at line 74 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_PROPFREQ

#define CONSHDLR_PROPFREQ   1

frequency for propagating domains; zero means only preprocessing propagation

Definition at line 75 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

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 76 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_MAXPREROUNDS

#define CONSHDLR_MAXPREROUNDS   -1

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

Definition at line 79 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_DELAYSEPA

#define CONSHDLR_DELAYSEPA   FALSE

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

Definition at line 80 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_DELAYPROP

#define CONSHDLR_DELAYPROP   FALSE

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

Definition at line 81 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_NEEDSCONS

#define CONSHDLR_NEEDSCONS   TRUE

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

Definition at line 82 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_PROP_TIMING

#define CONSHDLR_PROP_TIMING   SCIP_PROPTIMING_BEFORELP

Definition at line 84 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

CONSHDLR_PRESOLTIMING

#define CONSHDLR_PRESOLTIMING   SCIP_PRESOLTIMING_MEDIUM

Definition at line 85 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

EVENTHDLR_BINVARS_NAME

#define EVENTHDLR_BINVARS_NAME   "optcumulativebinvars"

Definition at line 94 of file cons_optcumulative.c.

Referenced by SCIP_DECL_EVENTEXEC(), and SCIPincludeConshdlrOptcumulative().

EVENTHDLR_BINVARS_DESC

#define EVENTHDLR_BINVARS_DESC   "bound change event handler for binary variables of optcumulative constraints"

Definition at line 95 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

EVENTHDLR_INTVARS_NAME

#define EVENTHDLR_INTVARS_NAME   "optcumulativeintvars"

Definition at line 97 of file cons_optcumulative.c.

Referenced by SCIP_DECL_EVENTEXEC(), and SCIPincludeConshdlrOptcumulative().

EVENTHDLR_INTVARS_DESC

#define EVENTHDLR_INTVARS_DESC   "bound change event handler for integer variables of optcumulative constraints"

Definition at line 98 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

DEFAULT_ROWRELAX

#define DEFAULT_ROWRELAX   FALSE

add linear relaxation as LP row (otherwise a knapsack constraint is created)?

Definition at line 107 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

DEFAULT_CONFLICTANALYSIS

#define DEFAULT_CONFLICTANALYSIS   TRUE

participate in conflict analysis?"

Definition at line 108 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

DEFAULT_INTERVALRELAX

#define DEFAULT_INTERVALRELAX   TRUE

create a relaxation for each start and end time point interval

Definition at line 109 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consInitOptcumulative

#define consInitOptcumulative   NULL

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

Definition at line 3009 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consExitOptcumulative

#define consExitOptcumulative   NULL

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

Definition at line 3013 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consExitpreOptcumulative

#define consExitpreOptcumulative   NULL

presolving deinitialization method of constraint handler (called after presolving has been finished)

Definition at line 3048 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consInitsolOptcumulative

#define consInitsolOptcumulative   NULL

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

Definition at line 3052 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consEnforelaxOptcomulative

#define consEnforelaxOptcomulative   NULL

constraint enforcing method of constraint handler for relaxation solutions

Definition at line 3055 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consSepasolOptcumulative

#define consSepasolOptcumulative   NULL

separation method of constraint handler for arbitrary primal solutions

Definition at line 3223 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consActiveOptcumulative

#define consActiveOptcumulative   NULL

constraint activation notification method of constraint handler

Definition at line 3806 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consDeactiveOptcumulative

#define consDeactiveOptcumulative   NULL

constraint deactivation notification method of constraint handler

Definition at line 3810 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consEnableOptcumulative

#define consEnableOptcumulative   NULL

constraint enabling notification method of constraint handler

Definition at line 3814 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consDisableOptcumulative

#define consDisableOptcumulative   NULL

constraint disabling notification method of constraint handler

Definition at line 3818 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consDelvarsOptcumulative

#define consDelvarsOptcumulative   NULL

variable deletion method of constraint handler

Definition at line 3821 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

consParseOptcumulative

#define consParseOptcumulative   NULL

constraint parsing method of constraint handler

Definition at line 3900 of file cons_optcumulative.c.

Referenced by SCIPincludeConshdlrOptcumulative().

Function Documentation

checkCounters()

static void checkCounters ( SCIP_CONSDATA *  consdata )

static

check constraint state (nglbfixedones and nglbfixedzeros)

Parameters

consdata

optcumulative constraint data

Definition at line 167 of file cons_optcumulative.c.

References convertBoundToInt(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetUbGlobal(), and SCIPvarGetUbLocal().

Referenced by applyZeroFixings(), catchAllEvents(), consdataDeletePos(), propagateCons(), and upgradeCons().

convertBoundToInt()

static int convertBoundToInt ( SCIP *  scip, SCIP_Real  bound  )

static

converts the given double bound which is integral to an int; in optimized mode the function gets inlined for performance; in debug mode we check some additional conditions

Parameters

scip	SCIP data structure
bound	double bound to convert

Definition at line 218 of file cons_optcumulative.c.

References bound, consdataCreate(), SCIP_Real, SCIPisEQ(), and SCIPisIntegral().

Referenced by addRelaxation(), checkCounters(), checkRedundancy(), collectVars(), computeMaxEnergy(), createSortedEventpoints(), detectImplications(), enfopsCons(), presolveCumulativeCondition(), propagateCons(), removeIrrelevantJobs(), and solveSubproblem().

consdataCreate()

static SCIP_RETCODE consdataCreate ( SCIP *  scip, SCIP_CONSDATA **  consdata, int  nvars, SCIP_VAR **  vars, SCIP_VAR **  binvars, int *  durations, int *  demands, int  capacity, SCIP_Bool  check  )

static

creates constraint data of optcumulative constraint

Parameters

scip	SCIP data structure
consdata	pointer to consdata
nvars	number of variables
vars	array of integer variables
binvars	array of variable representing if the job has to be processed on this machine
durations	array containing corresponding durations
demands	array containing corresponding demands
capacity	available cumulative capacity
check	is the corresponding constraint a check constraint

Definition at line 241 of file cons_optcumulative.c.

References consdataFree(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemory, SCIPdebugMessage, SCIPduplicateBlockMemoryArray, SCIPgetTransformedVars(), SCIPisTransformed(), and SCIPmarkDoNotMultaggrVar().

Referenced by convertBoundToInt(), SCIP_DECL_CONSTRANS(), and SCIPcreateConsOptcumulative().

consdataFree()

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

static

frees a optcumulative constraint data

Parameters

scip	SCIP data structure
consdata	pointer to linear constraint data

Definition at line 338 of file cons_optcumulative.c.

References consdataPrint(), NULL, SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemory, SCIPfreeBlockMemoryArray, SCIPreleaseCons(), and SCIPreleaseRow().

Referenced by consdataCreate(), and SCIP_DECL_CONSDELETE().

consdataPrint()

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

static

prints optcumulative constraint to file stream

Parameters

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

Definition at line 381 of file cons_optcumulative.c.

References conshdlrdataCreate(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPinfoMessage(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), and SCIPwriteVarName().

Referenced by consdataFree(), and SCIP_DECL_CONSPRINT().

conshdlrdataCreate()

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

static

creates constaint handler data for set partitioning / packing / covering constraint handler

Parameters

scip	SCIP data structure
conshdlrdata	pointer to store the constraint handler data
eventhdlrbinvars	used event handler for tracing bound changes on binary variables
eventhdlrintvars	used event handler for tracing bound changes on integer variables

Definition at line 422 of file cons_optcumulative.c.

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

Referenced by consdataPrint(), and SCIPincludeConshdlrOptcumulative().

conshdlrdataFree()

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

static

frees constraint handler data for set partitioning / packing / covering constraint handler

Parameters

scip	SCIP data structure
conshdlrdata	pointer to the constraint handler data

Definition at line 445 of file cons_optcumulative.c.

References NULL, SCIP_OKAY, SCIPfreeBlockMemory, and unlockRounding().

Referenced by conshdlrdataCreate(), and SCIP_DECL_CONSFREE().

unlockRounding()

static SCIP_RETCODE unlockRounding ( SCIP *  scip, SCIP_CONS *  cons, SCIP_VAR *  binvar, SCIP_VAR *  var, SCIP_Bool  downlock, SCIP_Bool  uplock  )

static

removes rounding locks for the given variable in the given optcumulative constraint

Parameters

scip	SCIP data structure
cons	optcumulative constraint
binvar	decision variable
var	start time variable
downlock	has the integer start time variable a down lock
uplock	has the integer start time variable an up lock

Definition at line 462 of file cons_optcumulative.c.

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

Referenced by consdataDeletePos(), and conshdlrdataFree().

catchEventBinvar()

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

static

catches events for binary variable at given position

Parameters

scip	SCIP data structure
cons	set partitioning / packing / covering constraint
eventhdlr	event handler to call for the event processing
pos	array position of variable to catch bound change events for

Definition at line 482 of file cons_optcumulative.c.

References dropEventBinvar(), NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDRELAXED, SCIP_EVENTTYPE_BOUNDTIGHTENED, SCIP_EVENTTYPE_GBDCHANGED, SCIP_OKAY, SCIPcatchVarEvent(), SCIPconsGetData(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetUbGlobal(), and SCIPvarGetUbLocal().

Referenced by catchAllEvents(), and unlockRounding().

dropEventBinvar()

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

static

drops events for binary variable at given position

Parameters

scip	SCIP data structure
cons	set partitioning / packing / covering constraint
eventhdlr	event handler to call for the event processing
pos	array position of variable to catch bound change events for

Definition at line 535 of file cons_optcumulative.c.

References catchEventIntvar(), NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDRELAXED, SCIP_EVENTTYPE_BOUNDTIGHTENED, SCIP_EVENTTYPE_GBDCHANGED, SCIP_OKAY, SCIPconsGetData(), SCIPdropVarEvent(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetUbGlobal(), and SCIPvarGetUbLocal().

Referenced by catchEventBinvar(), consdataDeletePos(), and dropAllEvents().

catchEventIntvar()

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

static

catches events for integer variable at given position

Parameters

scip	SCIP data structure
cons	set partitioning / packing / covering constraint
eventhdlr	event handler to call for the event processing
pos	array position of variable to catch bound change events for

Definition at line 582 of file cons_optcumulative.c.

References dropEventIntvar(), NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDTIGHTENED, SCIP_EVENTTYPE_GBDCHANGED, SCIP_OKAY, SCIPcatchVarEvent(), and SCIPconsGetData().

Referenced by catchAllEvents(), and dropEventBinvar().

dropEventIntvar()

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

static

drops events for integer variable at given position

Parameters

scip	SCIP data structure
cons	set partitioning / packing / covering constraint
eventhdlr	event handler to call for the event processing
pos	array position of variable to catch bound change events for

Definition at line 617 of file cons_optcumulative.c.

References catchAllEvents(), NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDTIGHTENED, SCIP_EVENTTYPE_GBDCHANGED, SCIP_OKAY, SCIPconsGetData(), and SCIPdropVarEvent().

Referenced by catchEventIntvar(), consdataDeletePos(), and dropAllEvents().

catchAllEvents()

static SCIP_RETCODE catchAllEvents ( SCIP *  scip, SCIP_CONS *  cons, SCIP_EVENTHDLR *  eventhdlrbinvars, SCIP_EVENTHDLR *  eventhdlrintvars  )

static

catches bound change events for all variables in transformed optcumulative constraint

Parameters

scip	SCIP data structure
cons	set partitioning / packing / covering constraint
eventhdlrbinvars	event handler to call for the event processing on binary variables
eventhdlrintvars	event handler to call for the event processing on integer variables

Definition at line 647 of file cons_optcumulative.c.

References catchEventBinvar(), catchEventIntvar(), checkCounters(), dropAllEvents(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPconsGetData().

Referenced by dropEventIntvar(), SCIP_DECL_CONSTRANS(), and SCIPcreateConsOptcumulative().

dropAllEvents()

static SCIP_RETCODE dropAllEvents ( SCIP *  scip, SCIP_CONS *  cons, SCIP_EVENTHDLR *  eventhdlrbinvars, SCIP_EVENTHDLR *  eventhdlrintvars  )

static

drops bound change events for all variables in transformed optcumulative constraint

Parameters

scip	SCIP data structure
cons	set partitioning / packing / covering constraint
eventhdlrbinvars	event handler to call for the event processing on binary variables
eventhdlrintvars	event handler to call for the event processing on integer variables

Definition at line 680 of file cons_optcumulative.c.

References createSortedEventpoints(), dropEventBinvar(), dropEventIntvar(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPconsGetData().

Referenced by catchAllEvents(), and SCIP_DECL_CONSDELETE().

createSortedEventpoints()

static void createSortedEventpoints ( SCIP *  scip, SCIP_CONSDATA *  consdata, int *  starttimes, int *  endtimes, int *  startindices, int *  endindices, SCIP_Bool  local  )

static

initialize the sorted event point arrays

Parameters

scip	SCIP data structure
consdata	constraint data
starttimes	array to store sorted start events
endtimes	array to store sorted end events
startindices	permutation with rspect to the start times
endindices	permutation with rspect to the end times
local	shall local bounds be used

Definition at line 712 of file cons_optcumulative.c.

References computeMaxEnergy(), convertBoundToInt(), SCIP_Longint, SCIPsortIntInt(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetUbGlobal(), and SCIPvarGetUbLocal().

Referenced by addRelaxation(), and dropAllEvents().

computeMaxEnergy()

static SCIP_Longint computeMaxEnergy ( SCIP *  scip, SCIP_CONSDATA *  consdata, int  starttime, int  endtime  )

static

computes the maximum energy for all variables which correspond to jobs which start between the given start time and end time

Returns

Maximum energy for the given time window

Parameters

scip	SCIP data structure
consdata	optcumulative constraint data
starttime	start time
endtime	end time

Definition at line 758 of file cons_optcumulative.c.

References collectVars(), convertBoundToInt(), SCIP_Longint, SCIPvarGetLbGlobal(), and SCIPvarGetUbGlobal().

Referenced by addRelaxation(), and createSortedEventpoints().

collectVars()

static SCIP_RETCODE collectVars ( SCIP *  scip, SCIP_CONSDATA *  consdata, SCIP_VAR **  vars, SCIP_Longint *  weights, int *  nvars, int  starttime, int  endtime  )

static

collects all variables which correspond to jobs which start between the given start time and end time

Parameters

scip	SCIP data structure
consdata	optcumulative constraint data
vars	array to store the variables
weights	array to store the weights
nvars	pointer to store the number of collected variables
starttime	start time
endtime	end time

Definition at line 789 of file cons_optcumulative.c.

References convertBoundToInt(), removeRedundantRows(), SCIP_Longint, SCIP_OKAY, SCIPvarGetLbGlobal(), and SCIPvarGetUbGlobal().

Referenced by addRelaxation(), and computeMaxEnergy().

removeRedundantRows()

static int removeRedundantRows ( SCIP_Longint *  rowtightness, int *  startidxs, int  nrows, SCIP_Longint  tightness  )

static

remove row which have a tightness which is smaller or equal to the given one

Returns

The number of remaining rows

Parameters

rowtightness	array containing the tightness for the previously selected rows
startidxs	array containing for each row the index for the start event
nrows	current number of rows
tightness	tightness to use to detect redundant rows

Definition at line 827 of file cons_optcumulative.c.

References createRow().

Referenced by addRelaxation(), and collectVars().

createRow()

static SCIP_RETCODE createRow ( SCIP *  scip, SCIP_CONSHDLR *  conshdlr, const char *  name, SCIP_VAR **  vars, SCIP_Longint *  weights, int  nvars, SCIP_Longint  capacity, SCIP_Bool  local, SCIP_Bool *  rowadded, SCIP_Bool *  consadded, SCIP_Bool *  cutoff  )

static

depending on the parameters setting a row or an knapsack constraint is created

Parameters

scip	SCIP data structure
conshdlr	constraint handler
name	name of the row
vars	array of variable representing if the job has to be processed on this machine
weights	start time variables of the activities which are assigned
nvars	number of variables
capacity	available cumulative capacity
local	create local row
rowadded	pointer to store if a row was added
consadded	pointer to store if a constraint was added
cutoff	pointer to store whether a cutoff occurred

Definition at line 854 of file cons_optcumulative.c.

References addRelaxation(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddCons(), SCIPaddRow(), SCIPaddVarToRow(), SCIPcacheRowExtensions(), SCIPconshdlrGetData(), SCIPcreateConsKnapsack(), SCIPcreateEmptyRowCons(), SCIPdebug, SCIPflushRowExtensions(), SCIPgetDepth(), SCIPinfinity(), SCIPisCutEfficacious(), SCIPprintCons(), SCIPprintRow(), SCIPreleaseCons(), SCIPreleaseRow(), SCIProwIsInLP(), and TRUE.

Referenced by addRelaxation(), enfopsCons(), and removeRedundantRows().

addRelaxation()

static SCIP_RETCODE addRelaxation ( SCIP *  scip, SCIP_CONSHDLR *  conshdlr, SCIP_CONSHDLRDATA *  conshdlrdata, SCIP_CONS *  cons, SCIP_Bool *  rowadded, SCIP_Bool *  consadded, SCIP_Bool *  cutoff  )

static

adds linear relaxation as cut to the LP

Parameters

scip	SCIP data structure
conshdlr	constraint handler
conshdlrdata	constraint handler data structure
cons	optcumulative constraint
rowadded	pointer to store if a row was added
consadded	pointer to store if a constraint was added
cutoff	pointer to store whether a cutoff occurred

Definition at line 925 of file cons_optcumulative.c.

References BMSclearMemoryArray, collectActivities(), collectVars(), computeMaxEnergy(), convertBoundToInt(), createRow(), createSortedEventpoints(), FALSE, MAX, MIN, NULL, removeRedundantRows(), SCIP_CALL, SCIP_Longint, SCIP_LONGINT_FORMAT, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMessage, SCIPfreeBufferArray, SCIPrestartSolve(), SCIPsnprintf(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), and TRUE.

Referenced by createRow(), SCIP_DECL_CONSINITLP(), and SCIP_DECL_CONSSEPALP().

collectActivities()

static void collectActivities ( SCIP_CONSDATA *  consdata, SCIP_VAR **  binvars, SCIP_VAR **  vars, int *  durations, int *  demands, int *  nfixedones, int *  nfixedzeros, SCIP_Bool *  auxiliary  )

static

collect all activities which are locally (that means in the current branch and bound node) assigned to that machine

Parameters

consdata	constraint data
binvars	array of variable representing if the job has to be processed on this machine
vars	start time variables of the activities which are assigned
durations	durations of the activities
demands	demands of the activities
nfixedones	pointer to store number of activities assigned to that machine
nfixedzeros	pointer to store number of binary variables fixed to zeor
auxiliary	pointer to store if the integer start time variables of the assigned activities are auxiliary variables; that is the case if the optcumulative choice constraints is the only one having locks on these variables

Definition at line 1152 of file cons_optcumulative.c.

References collectSolActivities(), FALSE, SCIPdebugMessage, SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetNLocksDown(), SCIPvarGetNLocksUp(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), and TRUE.

Referenced by addRelaxation(), propagateCons(), and upgradeCons().

collectSolActivities()

static void collectSolActivities ( SCIP *  scip, SCIP_CONSDATA *  consdata, SCIP_SOL *  sol, SCIP_VAR **  binvars, SCIP_VAR **  vars, int *  durations, int *  demands, int *  nvars, int *  nfixedones, int *  nfixedzeros, SCIP_Bool *  auxiliary  )

static

collect all activities which are assigned to that machine in the given solution

Parameters

scip	SCIP data structure
consdata	constraint data
sol	primal solution, or NULL for current LP/pseudo solution
binvars	array of variable representing if the job has to be processed on this machine
vars	start time variables of the activities which are assigned
durations	durations of the activities
demands	demands of the activities
nvars	pointer to store number of activities assigned to that machine
nfixedones	pointer to store number of binary variables locally fixed to one
nfixedzeros	pointer to store number of binary variables locally fixed to zero
auxiliary	pointer to store if the integer start time variables of the assigned activities are auxiliary variables; that is the case if the machine choice constraints is the only one haveing locks on these variables

Definition at line 1207 of file cons_optcumulative.c.

References FALSE, SCIPdebugMessage, SCIPgetSolVal(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetNLocksDown(), SCIPvarGetNLocksUp(), SCIPvarGetUbLocal(), solveCumulative(), and TRUE.

Referenced by checkCons(), collectActivities(), and enfopsCons().

solveCumulative()

static SCIP_RETCODE solveCumulative ( SCIP *  scip, int  nvars, SCIP_VAR **  vars, int *  durations, int *  demands, int  capacity, int  hmin, int  hmax, SCIP_Bool  local, SCIP_Real *  ests, SCIP_Real *  lsts, SCIP_Longint  maxnodes, SCIP_Bool *  solved, SCIP_Bool *  infeasible, SCIP_Bool *  unbounded, SCIP_Bool *  error  )

static

solves given cumulative condition as independent sub problem

Note

The time and memory limit of the SCIP environment in transferred to sub solver

If the problem was solved to the earliest start times (ests) and latest start times (lsts) array contain the solution values; If the problem was not solved these two arrays contain the global bounds at the time the sub solver was interrupted.

Parameters

scip	SCIP data structure
nvars	number of start time variables (activities)
vars	start time variables
durations	array of durations
demands	array of demands
capacity	cumulative capacity
hmin	left bound of time axis to be considered (including hmin)
hmax	right bound of time axis to be considered (not including hmax)
local	use local bounds, otherwise global
ests	array to store the earlier start time for each job
lsts	array to store the latest start time for each job
maxnodes	maximum number of branch-and-bound nodes to solve the single cumulative constraint (-1: no limit)
solved	pointer to store if the problem is solved (to optimality)
infeasible	pointer to store if the problem is infeasible
unbounded	pointer to store if the problem is unbounded
error	pointer to store if an error occurred

Definition at line 1265 of file cons_optcumulative.c.

References createConflictCons(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPfreeBufferArray, SCIPgetMemExternEstim(), SCIPgetMemUsed(), SCIPgetRealParam(), SCIPgetSolvingTime(), SCIPisInfinity(), SCIPsolveCumulative(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetUbGlobal(), and SCIPvarGetUbLocal().

Referenced by checkRedundancy(), collectSolActivities(), enfopsCons(), SCIPsetSolveCumulative(), and solveSubproblem().

createConflictCons()

static SCIP_RETCODE createConflictCons ( SCIP *  scip, const char *  name, SCIP_VAR **  binvars, int  nvars  )

static

create a logicor constraint which ensures that the jobs related to binary variables are not assigned in the same time to this optional cumulative constraint

Parameters

scip	SCIP data structure
name	name of conflict constraint
binvars	array of binary variables
nvars	number of variables

Definition at line 1339 of file cons_optcumulative.c.

References checkRedundancy(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddCoefLogicor(), SCIPaddCons(), SCIPcreateConsLogicor(), SCIPgetNegatedVar(), SCIPreleaseCons(), SCIPvarGetLbGlobal(), and TRUE.

Referenced by checkRedundancy(), enfopsCons(), and solveCumulative().

checkRedundancy()

static SCIP_RETCODE checkRedundancy ( SCIP *  scip, SCIP_CONS *  cons, int *  ndelconss, SCIP_Bool *  redundant  )

static

check of the given constraint is redundant

Parameters

scip	SCIP data structure
cons	optcumulative constraint which collapsed to a cumulative constraint locally
ndelconss	pointer to store the number of deleted constraints
redundant	pointer to store if the constraint is redundant

Definition at line 1373 of file cons_optcumulative.c.

References convertBoundToInt(), createConflictCons(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_ERROR, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPchgVarLbGlobal(), SCIPchgVarUbGlobal(), SCIPconsGetData(), SCIPconsGetName(), SCIPdelConsLocal(), SCIPfreeBufferArray, SCIPinProbing(), SCIPsortRealPtrPtrIntInt(), SCIPvarGetLbGlobal(), SCIPvarGetNLocksDown(), SCIPvarGetNLocksUp(), SCIPvarGetUbGlobal(), solveCumulative(), solveSubproblem(), and TRUE.

Referenced by createConflictCons(), and SCIP_DECL_CONSPROP().

solveSubproblem()

static SCIP_RETCODE solveSubproblem ( SCIP *  scip, SCIP_CONS *  cons, SCIP_Bool  conflictanalysis, SCIP_CONSDATA *  consdata, SCIP_VAR **  binvars, SCIP_VAR **  vars, int *  durations, int *  demands, int  nvars, int *  nfixedvars, int *  nchgbds, int *  ndelconss, SCIP_Bool *  cutoff  )

static

solve the cumulative sub problem

Parameters

scip	SCIP data structure
cons	optcumulative constraint which collapsed to a cumulative constraint locally
conflictanalysis	should conflict analysis be called for infeasible subproblems
consdata	constraint data
binvars	array of variable representing if the job has to be processed on this machine
vars	start time variables of the activities which are assigned
durations	durations of the activities
demands	demands of the activities
nvars	number of activities assigned to that machine
nfixedvars	pointer to store the numbver of fixed variables
nchgbds	pointer to store the number of changed bounds
ndelconss	pointer to store the number of deleted constraints
cutoff	pointer to store if the constraint is violated

Definition at line 1520 of file cons_optcumulative.c.

References checkCons(), convertBoundToInt(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_CONFTYPE_PROPAGATION, SCIP_ERROR, SCIP_OKAY, SCIP_Real, SCIPaddConflictBinvar(), SCIPaddConflictLb(), SCIPaddConflictUb(), SCIPallocBufferArray, SCIPanalyzeConflictCons(), SCIPdelConsLocal(), SCIPfixVar(), SCIPfreeBufferArray, SCIPinitConflictAnalysis(), SCIPinProbing(), SCIPsortRealPtrPtrIntInt(), SCIPtightenVarLb(), SCIPtightenVarUb(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), solveCumulative(), and TRUE.

Referenced by checkRedundancy(), and propagateCons().

checkCons()

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

static

check if the given constrait is valid; checks each starting point of a job whether the remaining capacity is at least zero or not. If not (*violated) is set to TRUE

Parameters

scip	SCIP data structure
cons	constraint to be checked
sol	primal solution, or NULL for current LP/pseudo solution
violated	pointer to store if the constraint is violated
printreason	should the reason for the violation be printed?

Definition at line 1681 of file cons_optcumulative.c.

References collectSolActivities(), enfopsCons(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPcheckCumulativeCondition(), SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMessage, and SCIPfreeBufferArray.

Referenced by SCIP_DECL_CONSCHECK(), and solveSubproblem().

enfopsCons()

static SCIP_RETCODE enfopsCons ( SCIP *  scip, SCIP_CONS *  cons, SCIP_SOL *  trysol, SCIP_Bool *  violated, SCIP_Bool *  consadded, SCIP_Bool *  solfeasible  )

static

check if the given constrait is valid; checks each starting point of a job whether the remaining capacity is at least zero or not. If not (*violated) is set to TRUE

Parameters

scip	SCIP data structure
cons	constraint to be checked
trysol	primal solution to construct, or NULL
violated	pointer to store if the constraint is violated/infeasible
consadded	pointer to store if a constraint was added
solfeasible	pointer to store if the constraint solution is potentially feasible

Definition at line 1736 of file cons_optcumulative.c.

References collectSolActivities(), convertBoundToInt(), createConflictCons(), createRow(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPcheckCumulativeCondition(), SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMessage, SCIPfreeBufferArray, SCIPincConsAge(), SCIPisStopped(), SCIPresetConsAge(), SCIPsetSolVal(), SCIPsortRealPtrPtrIntInt(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), solveCumulative(), TRUE, and upgradeCons().

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

upgradeCons()

static SCIP_RETCODE upgradeCons ( SCIP *  scip, SCIP_CONS *  cons, int *  ndelconss, int *  nupgdconss, SCIP_Bool *  mustpropagate  )

static

upgrade constraints to an cumulative constraint

Parameters

scip	SCIP data structure
cons	constraint to be checked
ndelconss	pointer to store the number of deleted constraints
nupgdconss	pointer to store the number of upgrade constraints
mustpropagate	pointer to store if the constraints has to be propagated

Definition at line 1940 of file cons_optcumulative.c.

References checkCounters(), collectActivities(), FALSE, fixIntegerVariable(), NULL, SCIP_Bool, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPaddCons(), SCIPaddConsLocal(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsChecked(), SCIPconsIsDeleted(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsCumulative(), SCIPdebugMessage, SCIPdelCons(), SCIPdelConsLocal(), SCIPfixVar(), SCIPfreeBufferArray, SCIPreleaseCons(), SCIPsetHmaxCumulative(), SCIPsetHminCumulative(), SCIPsnprintf(), and TRUE.

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

fixIntegerVariable()

static SCIP_RETCODE fixIntegerVariable ( SCIP *  scip, SCIP_VAR *  var, SCIP_Bool  downlock, SCIP_Bool  uplock, int *  nchgbds  )

static

since the binary variable is fixed to zero, depending in the objective coefficient of the integer variable and the rounding locks, we might can fix the integer variable

Parameters

scip	SCIP data structure
var	integer variable to fix
downlock	does the variable has down lock given by the optcumulative constraint
uplock	does the variable has up lock given by the optcumulative constraint
nchgbds	pointer to store the number changed variable bounds

Definition at line 2064 of file cons_optcumulative.c.

References consdataDeletePos(), SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIP_Real, SCIPfixVar(), SCIPinProbing(), SCIPinRepropagation(), SCIPisNegative(), SCIPisPositive(), SCIPisZero(), SCIPvarGetLbLocal(), SCIPvarGetNLocksDown(), SCIPvarGetNLocksUp(), SCIPvarGetObj(), and SCIPvarGetUbLocal().

Referenced by applyZeroFixings(), propagateCons(), and upgradeCons().

consdataDeletePos()

static SCIP_RETCODE consdataDeletePos ( SCIP *  scip, SCIP_CONSDATA *  consdata, SCIP_CONS *  cons, int  pos  )

static

deletes coefficient at given position from constraint data

Parameters

scip	SCIP data structure
consdata	cumulative constraint data
cons	knapsack constraint
pos	position of coefficient to delete

Definition at line 2137 of file cons_optcumulative.c.

References applyZeroFixings(), checkCounters(), dropEventBinvar(), dropEventIntvar(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsTransformed(), SCIPdebugMessage, SCIPvarGetName(), and unlockRounding().

Referenced by applyZeroFixings(), detectImplications(), fixIntegerVariable(), presolveCumulativeCondition(), and removeIrrelevantJobs().

applyZeroFixings()

static SCIP_RETCODE applyZeroFixings ( SCIP *  scip, SCIP_CONS *  cons, int *  nchgcoefs, int *  nchgbds  )

static

remove all jobs for which the binary variable is globally fixed to zero

Parameters

scip	SCIP data structure
cons	constraint to be checked
nchgcoefs	pointer to store the number changed coefficients
nchgbds	pointer to store the number changed variable bounds

Definition at line 2197 of file cons_optcumulative.c.

References checkCounters(), consdataDeletePos(), fixIntegerVariable(), NULL, removeIrrelevantJobs(), SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsIsChecked(), SCIPdebugMessage, SCIPvarGetName(), SCIPvarGetUbGlobal(), and TRUE.

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

removeIrrelevantJobs()

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

static

remove jobs which have a duration or demand of zero (zero energy) or lay outside the efficient horizon [hmin, hmax); this is done in the SCIP_DECL_CONSINITPRE() callback

Parameters

scip	SCIP data structure
cons	constraint to propagate

Definition at line 2245 of file cons_optcumulative.c.

References consdataDeletePos(), convertBoundToInt(), NULL, presolveCumulativeCondition(), SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMessage, SCIPvarGetLbGlobal(), SCIPvarGetName(), and SCIPvarGetUbGlobal().

Referenced by applyZeroFixings(), and SCIP_DECL_CONSINITPRE().

presolveCumulativeCondition()

static SCIP_RETCODE presolveCumulativeCondition ( SCIP *  scip, SCIP_CONS *  cons, int *  nfixedvars, int *  nchgcoefs, int *  nchgsides, SCIP_Bool *  cutoff  )

static

presolve cumulative condition w.r.t. effective horizon by detecting irrelevant variables

Parameters

scip	SCIP data structure
cons	constraint to be checked
nfixedvars	pointer to store the number of fixed variables
nchgcoefs	pointer to store the number of changed coefficients
nchgsides	pointer to store the number of changed sides
cutoff	buffer to store whether a cutoff is detected

Definition at line 2306 of file cons_optcumulative.c.

References BMSclearMemoryArray, consdataDeletePos(), convertBoundToInt(), createSetPackingCons(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMessage, SCIPfixVar(), SCIPfreeBufferArray, SCIPpresolveCumulativeCondition(), SCIPvarGetLbGlobal(), and SCIPvarGetUbGlobal().

Referenced by removeIrrelevantJobs(), and SCIP_DECL_CONSPRESOL().

createSetPackingCons()

static SCIP_RETCODE createSetPackingCons ( SCIP *  scip, SCIP_VAR *  var1, SCIP_VAR *  var2  )

static

create an an set partitioning constraint

Parameters

scip	SCIP data structure
var1	first variable
var2	second variable

Definition at line 2391 of file cons_optcumulative.c.

References createVarboundCons(), NULL, SCIP_CALL, SCIP_OKAY, SCIPaddCoefSetppc(), SCIPaddCons(), SCIPcreateConsBasicSetpack(), SCIPdebugPrintCons, and SCIPreleaseCons().

Referenced by detectImplications(), and presolveCumulativeCondition().

createVarboundCons()

static SCIP_RETCODE createVarboundCons ( SCIP *  scip, SCIP_VAR *  binvar, SCIP_VAR *  intvar, int  bound, SCIP_Bool  lower  )

static

create variable bound constraint

Parameters

scip	SCIP data structure
binvar	binary variable x
intvar	integer variable y
bound	variable bound
lower	variable lower bound? (Otherwise upper bound)

Definition at line 2412 of file cons_optcumulative.c.

References bound, createBounddisjunctionCons(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddCons(), SCIPcreateConsBasicVarbound(), SCIPdebugPrintCons, SCIPinfinity(), SCIPreleaseCons(), SCIPvarGetLbGlobal(), and SCIPvarGetUbGlobal().

Referenced by createSetPackingCons(), and detectImplications().

createBounddisjunctionCons()

static SCIP_RETCODE createBounddisjunctionCons ( SCIP *  scip, SCIP_VAR *  binvar, SCIP_VAR *  intvar, int  lb, int  ub  )

static

create bound disjunction constraint

Parameters

scip	SCIP data structure
binvar	binary variable x
intvar	integer variable y
lb	lower bound
ub	lower bound

Definition at line 2450 of file cons_optcumulative.c.

References detectImplications(), NULL, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddCons(), SCIPallocBufferArray, SCIPcreateConsBasicBounddisjunction(), SCIPdebugPrintCons, SCIPfreeBufferArray, and SCIPreleaseCons().

Referenced by createVarboundCons(), and detectImplications().

detectImplications()

static SCIP_RETCODE detectImplications ( SCIP *  scip, SCIP_CONS *  cons, int *  nchgcoefs, int *  naddconss  )

static

detect implication

Parameters

scip	SCIP data structure
cons	optcumulative constraint
nchgcoefs	pointer to store the number of changed coefficients
naddconss	pointer to store the number of added constraints

Definition at line 2496 of file cons_optcumulative.c.

References consdataDeletePos(), convertBoundToInt(), createBounddisjunctionCons(), createSetPackingCons(), createVarboundCons(), FALSE, NULL, propagateCons(), SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMessage, SCIPvarGetLbGlobal(), SCIPvarGetName(), SCIPvarGetUbGlobal(), and TRUE.

Referenced by createBounddisjunctionCons(), and SCIP_DECL_CONSPRESOL().

propagateCons()

static SCIP_RETCODE propagateCons ( SCIP *  scip, SCIP_CONS *  cons, SCIP_Bool  conflictanalysis, int *  nfixedvars, int *  nchgbds, int *  ndelconss, SCIP_Bool *  cutoff  )

static

propgates given constraint

Parameters

scip	SCIP data structure
cons	constraint to be checked
conflictanalysis	should conflict analysis be called for infeasible subproblems
nfixedvars	pointer to store the number of fixed variables
nchgbds	pointer to store the number changed variable bounds
ndelconss	pointer to store the number of deleted constraints
cutoff	pointer to store if a cutoff (infeasibility) was detected

Definition at line 2708 of file cons_optcumulative.c.

References BMSclearMemoryArray, SCIP_Profile::capacity, checkCounters(), collectActivities(), convertBoundToInt(), FALSE, fixIntegerVariable(), NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSHDLRCOPY(), SCIP_OKAY, SCIP_PRESOLTIMING_ALWAYS, SCIP_Real, SCIPaddConflictBinvar(), SCIPallocBufferArray, SCIPanalyzeConflictCons(), SCIPcomputeHmin(), SCIPconsGetData(), SCIPconsIsChecked(), SCIPcreateWorstCaseProfile(), SCIPdebugMessage, SCIPendProbing(), SCIPfixVarProbing(), SCIPfreeBufferArray, SCIPinProbing(), SCIPinRepropagation(), SCIPisStopped(), SCIPnewProbingNode(), SCIPprofileCreate(), SCIPprofileDeleteCore(), SCIPprofileFree(), SCIPprofileInsertCore(), SCIPpropagateProbing(), SCIPpropCumulativeCondition(), SCIPstartProbing(), SCIPtightenVarLb(), SCIPtightenVarUb(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetNLocksDown(), SCIPvarGetNLocksUp(), SCIPvarGetUbLocal(), solveSubproblem(), and TRUE.

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

SCIP_DECL_CONSHDLRCOPY()

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyOptcumulative  )

static

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

Definition at line 2977 of file cons_optcumulative.c.

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

Referenced by propagateCons().

SCIP_DECL_CONSFREE()

static SCIP_DECL_CONSFREE ( consFreeOptcumulative  )

static

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

Definition at line 2993 of file cons_optcumulative.c.

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

Referenced by SCIP_DECL_CONSHDLRCOPY().

SCIP_DECL_CONSINITPRE()

static SCIP_DECL_CONSINITPRE ( consInitpreOptcumulative  )

static

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

Definition at line 3018 of file cons_optcumulative.c.

References CONSHDLR_NAME, NULL, removeIrrelevantJobs(), SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), and SCIPfindHeur().

SCIP_DECL_CONSEXITSOL()

static SCIP_DECL_CONSEXITSOL ( consExitsolOptcumulative  )

static

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

Definition at line 3059 of file cons_optcumulative.c.

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

SCIP_DECL_CONSDELETE()

static SCIP_DECL_CONSDELETE ( consDeleteOptcumulative  )

static

frees specific constraint data

Definition at line 3085 of file cons_optcumulative.c.

References consdataFree(), CONSHDLR_NAME, dropAllEvents(), NULL, SCIP_CALL, SCIP_DECL_CONSTRANS(), SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), and SCIPvarIsTransformed().

Referenced by SCIP_DECL_CONSEXITSOL().

SCIP_DECL_CONSTRANS()

static SCIP_DECL_CONSTRANS ( consTransOptcumulative  )

static

transforms constraint data into data belonging to the transformed problem

Definition at line 3114 of file cons_optcumulative.c.

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

Referenced by SCIP_DECL_CONSDELETE().

SCIP_DECL_CONSINITLP()

static SCIP_DECL_CONSINITLP ( consInitlpOptcumulative  )

static

LP initialization method of constraint handler

Definition at line 3162 of file cons_optcumulative.c.

References addRelaxation(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSSEPALP(), SCIP_OKAY, SCIPconshdlrGetData(), and SCIPconsIsInitial().

Referenced by SCIP_DECL_CONSTRANS().

SCIP_DECL_CONSSEPALP()

static SCIP_DECL_CONSSEPALP ( consSepalpOptcumulative  )

static

separation method of constraint handler for LP solutions

Definition at line 3189 of file cons_optcumulative.c.

References addRelaxation(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_SEPARATED, and SCIPconshdlrGetData().

Referenced by SCIP_DECL_CONSINITLP().

SCIP_DECL_CONSENFOLP()

static SCIP_DECL_CONSENFOLP ( consEnfolpOptcumulative  )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 3228 of file cons_optcumulative.c.

References CONSHDLR_NAME, enfopsCons(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_CONSADDED, SCIP_DECL_CONSENFOPS(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPcreateCurrentSol(), SCIPdebugMessage, SCIPfreeSol(), SCIPheurPassSolTrySol(), SCIPprintSol(), and TRUE.

SCIP_DECL_CONSENFOPS()

static SCIP_DECL_CONSENFOPS ( consEnfopsOptcumulative  )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 3299 of file cons_optcumulative.c.

References CONSHDLR_NAME, enfopsCons(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_CONSADDED, SCIP_DECL_CONSCHECK(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPcreateCurrentSol(), SCIPdebugMessage, SCIPfreeSol(), SCIPheurPassSolTrySol(), and TRUE.

Referenced by SCIP_DECL_CONSENFOLP().

SCIP_DECL_CONSCHECK()

static SCIP_DECL_CONSCHECK ( consCheckOptcumulative  )

static

feasibility check method of constraint handler for integral solutions

Definition at line 3355 of file cons_optcumulative.c.

References checkCons(), CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSPROP(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, and SCIPconshdlrGetName().

Referenced by SCIP_DECL_CONSENFOPS().

SCIP_DECL_CONSPROP()

static SCIP_DECL_CONSPROP ( consPropOptcumulative  )

static

domain propagation method of constraint handler

Definition at line 3383 of file cons_optcumulative.c.

References applyZeroFixings(), checkRedundancy(), FALSE, NULL, propagateCons(), SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSPRESOL(), SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_REDUCEDDOM, SCIPconshdlrGetData(), SCIPconsIsDeleted(), SCIPdebugMessage, SCIPincConsAge(), SCIPinProbing(), SCIPresetConsAge(), TRUE, and upgradeCons().

Referenced by SCIP_DECL_CONSCHECK().

SCIP_DECL_CONSPRESOL()

static SCIP_DECL_CONSPRESOL ( consPresolOptcumulative  )

static

presolving method of constraint handler

Definition at line 3482 of file cons_optcumulative.c.

References applyZeroFixings(), detectImplications(), FALSE, NULL, presolveCumulativeCondition(), propagateCons(), SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSRESPROP(), SCIP_DIDNOTFIND, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_SUCCESS, SCIPaddCons(), SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsOptcumulative(), SCIPdebugMessage, SCIPdelCons(), SCIPinProbing(), SCIPnormalizeCumulativeCondition(), SCIPreleaseCons(), SCIPsnprintf(), SCIPsplitCumulativeCondition(), TRUE, and upgradeCons().

Referenced by SCIP_DECL_CONSPROP().

SCIP_DECL_CONSRESPROP()

static SCIP_DECL_CONSRESPROP ( consRespropOptcumulative  )

static

propagation conflict resolving method of constraint handler

Definition at line 3652 of file cons_optcumulative.c.

References BMSclearMemoryArray, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSLOCK(), SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_SUCCESS, SCIPaddConflictBinvar(), SCIPaddConflictLb(), SCIPaddConflictUb(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPdebugMessage, SCIPfreeBufferArray, SCIPrespropCumulativeCondition(), SCIPvarGetLbAtIndex(), and TRUE.

Referenced by SCIP_DECL_CONSPRESOL().

SCIP_DECL_CONSLOCK()

static SCIP_DECL_CONSLOCK ( consLockOptcumulative  )

static

variable rounding lock method of constraint handler

Definition at line 3764 of file cons_optcumulative.c.

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

Referenced by SCIP_DECL_CONSRESPROP().

SCIP_DECL_CONSPRINT()

static SCIP_DECL_CONSPRINT ( consPrintOptcumulative  )

static

constraint display method of constraint handler

Definition at line 3825 of file cons_optcumulative.c.

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

SCIP_DECL_CONSCOPY()

static SCIP_DECL_CONSCOPY ( consCopyOptcumulative  )

static

constraint copying method of constraint handler

Definition at line 3838 of file cons_optcumulative.c.

References FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPcreateConsOptcumulative(), SCIPfreeBufferArray, SCIPgetVarCopy(), and TRUE.

Referenced by SCIP_DECL_CONSPRINT().

SCIP_DECL_EVENTEXEC() [1/2]

static SCIP_DECL_EVENTEXEC ( eventExecOptcumulativeBinvars  )

static

Definition at line 3908 of file cons_optcumulative.c.

References EVENTHDLR_BINVARS_NAME, FALSE, NULL, SCIP_EVENTTYPE_GLBCHANGED, SCIP_EVENTTYPE_GUBCHANGED, SCIP_EVENTTYPE_LBRELAXED, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_EVENTTYPE_UBRELAXED, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPeventGetType(), SCIPeventhdlrGetName(), and SCIPinProbing().

SCIP_DECL_EVENTEXEC() [2/2]

static SCIP_DECL_EVENTEXEC ( eventExecOptcumulativeIntvars  )

static

Definition at line 3957 of file cons_optcumulative.c.

References EVENTHDLR_INTVARS_NAME, FALSE, NULL, SCIP_OKAY, SCIPeventhdlrGetName(), SCIPincludeConshdlrOptcumulative(), and SCIPinProbing().

SCIPincludeConshdlrOptcumulative()

SCIP_RETCODE SCIPincludeConshdlrOptcumulative

(

SCIP *

scip

)

creates the handler for optcumulative constraints and includes it in SCIP

Parameters

scip	SCIP data structure

Definition at line 3987 of file cons_optcumulative.c.

References consActiveOptcumulative, consDeactiveOptcumulative, consDelvarsOptcumulative, consDisableOptcumulative, consEnableOptcumulative, consEnforelaxOptcomulative, consExitOptcumulative, consExitpreOptcumulative, 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(), consInitOptcumulative, consInitsolOptcumulative, consParseOptcumulative, consSepasolOptcumulative, DEFAULT_CONFLICTANALYSIS, DEFAULT_INTERVALRELAX, DEFAULT_ROWRELAX, EVENTHDLR_BINVARS_DESC, EVENTHDLR_BINVARS_NAME, EVENTHDLR_INTVARS_DESC, EVENTHDLR_INTVARS_NAME, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddBoolParam(), SCIPcreateConsOptcumulative(), SCIPincludeConshdlr(), and SCIPincludeEventhdlrBasic().

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

SCIPcreateConsOptcumulative()

SCIP_RETCODE SCIPcreateConsOptcumulative	(	SCIP *	scip,
		SCIP_CONS **	cons,
		const char *	name,
		int	nvars,
		SCIP_VAR **	vars,
		SCIP_VAR **	binvars,
		int *	durations,
		int *	demands,
		int	capacity,
		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 optcumulative constraint

Parameters

scip	SCIP data structure
cons	pointer to hold the created constraint
name	name of constraint
nvars	number of variables (jobs)
vars	array of integer variable which corresponds to starting times for a job
binvars	array of variable representing if the job has to be processed on this machine
durations	array containing corresponding durations
demands	array containing corresponding demands
capacity	available cumulative capacity
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 seperated 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 4044 of file cons_optcumulative.c.

References catchAllEvents(), consdataCreate(), CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_STAGE_PROBLEM, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPerrorMessage, SCIPfindConshdlr(), and SCIPgetStage().

Referenced by createCipFormulation(), createMipCpFormulation(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPRESOL(), and SCIPincludeConshdlrOptcumulative().