49#define HEUR_NAME "coefdiving"
50#define HEUR_DESC "LP diving heuristic that chooses fixings w.r.t. the matrix coefficients"
51#define HEUR_DISPCHAR SCIP_HEURDISPCHAR_DIVING
52#define HEUR_PRIORITY -1001000
55#define HEUR_MAXDEPTH -1
56#define HEUR_TIMING SCIP_HEURTIMING_AFTERLPPLUNGE
57#define HEUR_USESSUBSCIP FALSE
58#define DIVESET_DIVETYPES SCIP_DIVETYPE_INTEGRALITY | SCIP_DIVETYPE_SOS1VARIABLE
59#define DIVESET_ISPUBLIC TRUE
66#define DEFAULT_MINRELDEPTH 0.0
67#define DEFAULT_MAXRELDEPTH 1.0
68#define DEFAULT_MAXLPITERQUOT 0.05
69#define DEFAULT_MAXLPITEROFS 1000
70#define DEFAULT_MAXDIVEUBQUOT 0.8
72#define DEFAULT_MAXDIVEAVGQUOT 0.0
74#define DEFAULT_MAXDIVEUBQUOTNOSOL 0.1
75#define DEFAULT_MAXDIVEAVGQUOTNOSOL 0.0
76#define DEFAULT_BACKTRACK TRUE
77#define DEFAULT_LPRESOLVEDOMCHGQUOT 0.15
78#define DEFAULT_LPSOLVEFREQ 0
79#define DEFAULT_ONLYLPBRANCHCANDS FALSE
81#define DEFAULT_RANDSEED 83
222 *
roundup = (nlocksdown > nlocksup || (nlocksdown == nlocksup && candsfrac > 0.5));
230 candsfrac = 1.0 - candsfrac;
234 candsfrac = 1.0 - candsfrac;
246 candsfrac = 1.0 - candsfrac;
259 else if( candsfrac < 0.01 )
280#define divesetAvailableCoefdiving NULL
#define SCIP_PROBINGSCORE_PENALTYRATIO
SCIP_RETCODE SCIPincludeHeurCoefdiving(SCIP *scip)
SCIP_RETCODE SCIPcreateDiveset(SCIP *scip, SCIP_DIVESET **diveset, SCIP_HEUR *heur, const char *name, SCIP_Real minreldepth, SCIP_Real maxreldepth, SCIP_Real maxlpiterquot, SCIP_Real maxdiveubquot, SCIP_Real maxdiveavgquot, SCIP_Real maxdiveubquotnosol, SCIP_Real maxdiveavgquotnosol, SCIP_Real lpresolvedomchgquot, int lpsolvefreq, int maxlpiterofs, unsigned int initialseed, SCIP_Bool backtrack, SCIP_Bool onlylpbranchcands, SCIP_Bool ispublic, SCIP_Bool specificsos1score, SCIP_DECL_DIVESETGETSCORE((*divesetgetscore)),)
SCIP_RANDNUMGEN * SCIPdivesetGetRandnumgen(SCIP_DIVESET *diveset)
SCIP_RETCODE SCIPsetHeurFree(SCIP *scip, SCIP_HEUR *heur,)
SCIP_HEURDATA * SCIPheurGetData(SCIP_HEUR *heur)
SCIP_RETCODE SCIPincludeHeurBasic(SCIP *scip, SCIP_HEUR **heur, const char *name, const char *desc, char dispchar, int priority, int freq, int freqofs, int maxdepth, SCIP_HEURTIMING timingmask, SCIP_Bool usessubscip, SCIP_DECL_HEUREXEC((*heurexec)), SCIP_HEURDATA *heurdata)
SCIP_RETCODE SCIPsetHeurCopy(SCIP *scip, SCIP_HEUR *heur,)
int SCIPheurGetNDivesets(SCIP_HEUR *heur)
SCIP_RETCODE SCIPsetHeurExit(SCIP *scip, SCIP_HEUR *heur,)
SCIP_RETCODE SCIPsetHeurInit(SCIP *scip, SCIP_HEUR *heur,)
const char * SCIPheurGetName(SCIP_HEUR *heur)
SCIP_DIVESET ** SCIPheurGetDivesets(SCIP_HEUR *heur)
int SCIPgetNLPRows(SCIP *scip)
#define SCIPfreeBlockMemory(scip, ptr)
#define SCIPallocBlockMemory(scip, ptr)
SCIP_Bool SCIPisFeasNegative(SCIP *scip, SCIP_Real val)
SCIP_Bool SCIPisEQ(SCIP *scip, SCIP_Real val1, SCIP_Real val2)
SCIP_Bool SCIPisFeasPositive(SCIP *scip, SCIP_Real val)
SCIP_Bool SCIPvarMayRoundUp(SCIP_VAR *var)
SCIP_Bool SCIPvarIsBinary(SCIP_VAR *var)
int SCIPvarGetNLocksUpType(SCIP_VAR *var, SCIP_LOCKTYPE locktype)
SCIP_Bool SCIPvarMayRoundDown(SCIP_VAR *var)
int SCIPvarGetNLocksDownType(SCIP_VAR *var, SCIP_LOCKTYPE locktype)
int SCIPrandomGetInt(SCIP_RANDNUMGEN *randnumgen, int minrandval, int maxrandval)
#define DEFAULT_ONLYLPBRANCHCANDS
#define DEFAULT_MAXDIVEUBQUOT
#define divesetAvailableCoefdiving
#define DEFAULT_LPRESOLVEDOMCHGQUOT
SCIPheurSetData(heur, NULL)
SCIPperformGenericDivingAlgorithm(scip, diveset, heurdata->sol, heur, result, nodeinfeasible, -1L, -1, -1.0, SCIP_DIVECONTEXT_SINGLE))
#define DEFAULT_MAXLPITERQUOT
#define DEFAULT_MAXDIVEAVGQUOT
#define DEFAULT_LPSOLVEFREQ
#define DEFAULT_BACKTRACK
#define DEFAULT_MAXDIVEUBQUOTNOSOL
#define DEFAULT_MAXRELDEPTH
#define DEFAULT_MAXLPITEROFS
SCIPfreeSol(scip, &heurdata->sol))
#define DEFAULT_MAXDIVEAVGQUOTNOSOL
#define DIVESET_DIVETYPES
#define DEFAULT_MINRELDEPTH
static SCIP_DIVESET * diveset
SCIPcreateSol(scip, &heurdata->sol, heur))
LP diving heuristic that chooses fixings w.r.t. the matrix coefficients.
assert(minobj< SCIPgetCutoffbound(scip))
methods commonly used by primal heuristics
public methods for primal heuristics
public methods for message output
public data structures and miscellaneous methods
public methods for problem variables
public methods for primal heuristic plugins and divesets
public methods for the LP relaxation, rows and columns
public methods for memory management
public methods for numerical tolerances
public methods for solutions
#define SCIP_DECL_HEURCOPY(x)
struct SCIP_HeurData SCIP_HEURDATA
#define SCIP_DECL_HEURINIT(x)
#define SCIP_DECL_HEUREXIT(x)
#define SCIP_DECL_HEURFREE(x)
#define SCIP_DECL_DIVESETGETSCORE(x)
#define SCIP_DECL_HEUREXEC(x)
#define SCIP_DIVETYPE_SOS1VARIABLE
#define SCIP_DIVETYPE_INTEGRALITY
@ SCIP_DIVECONTEXT_SINGLE
enum SCIP_Retcode SCIP_RETCODE