Hi there,
I face the same problem as described here: On 27.01.20 18:59, Marcus Daniels wrote.
Finding a gap of 2,67% scip does not evolve the bounds anymore and seems to stuck somewhere from 74 sec. onwards (see also the statistics below):
199s|230700 | 39973 |851710 | 3.7 | 143M | 104 | 448 | 498 | 572 | 225k| 1 | 18 | 0 |-2.072734e-01 |-2.018794e-01 | 2.67%| 71.62%
199s|230800 | 39985 |851953 | 3.7 | 143M | 104 | 448 | 498 | 572 | 225k| 1 | 18 | 0 |-2.072734e-01 |-2.018794e-01 | 2.67%| 71.62%
199s|230900 | 39997 |852211 | 3.7 | 143M | 104 | 448 | 498 | 572 | 225k| 1 | 18 | 0 |-2.072734e-01 |-2.018794e-01 | 2.67%| 71.62%
199s|231000 | 40009 |852444 | 3.7 | 143M | 104 | 448 | 498 | 572 | 225k| 1 | 18 | 0 |-2.072734e-01 |-2.018794e-01 | 2.67%| 71.62%
The example is very small and a non-convex MINLP. I tried already Stefan's approach and set the following without success:
> constraints/quadratic/sepanlpmincont = 0 or
> constraints/quadratic/gaugecuts = TRUE or
> constraints/quadratic/projectedcuts = TRUE or"
Any help to improve the solving time I appreciate.
Best regards,
Johannes
STATISTICS:
SCIP Status : solving was interrupted [time limit reached]
Total Time : 200.00
solving : 200.00
presolving : 0.00 (included in solving)
reading : 0.00
copying : 0.00 (9 #copies) (minimal 0.00, maximal 0.00, average 0.00)
Original Problem :
Problem name : sim4dhs
Variables : 833 (0 binary, 0 integer, 0 implicit integer, 833 continuous)
Constraints : 1157 initial, 1157 maximal
Objective : minimize, 18 non-zeros (abs.min = 1, abs.max = 1)
Presolved Problem :
Problem name : t_sim4dhs
Variables : 448 (0 binary, 0 integer, 0 implicit integer, 448 continuous)
Constraints : 502 initial, 503 maximal
Objective : minimize, 36 non-zeros (abs.min = 1, abs.max = 1)
Nonzeros : 1486 constraint, 0 clique table
Presolvers : ExecTime SetupTime Calls FixedVars AggrVars ChgTypes ChgBounds AddHoles DelCons AddCons ChgSides ChgCoefs
boundshift : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
convertinttobin : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
domcol : 0.00 0.00 1 0 0 0 0 0 0 0 0 0
dualagg : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
dualcomp : 0.00 0.00 1 0 0 0 0 0 0 0 0 0
dualinfer : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
dualsparsify : 0.00 0.00 1 0 0 0 0 0 0 0 0 0
gateextraction : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
implics : 0.00 0.00 1 0 0 0 0 0 0 0 0 0
inttobinary : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
milp : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
qpkktref : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
redvub : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
sparsify : 0.00 0.00 1 0 0 0 0 0 0 0 0 0
stuffing : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
trivial : 0.00 0.00 9 0 0 0 0 0 0 0 0 0
tworowbnd : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
dualfix : 0.00 0.00 9 54 0 0 0 0 0 0 0 0
genvbounds : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
probing : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
pseudoobj : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
symmetry : 0.00 0.00 1 0 0 0 0 0 0 0 0 0
vbounds : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
linear : 0.00 0.00 10 110 221 0 462 0 547 0 0 0
bounddisjunction : 0.00 0.00 8 0 0 0 0 0 270 0 0 0
quadratic : 0.00 0.00 11 0 0 0 486 0 0 162 0 0
benders : 0.00 0.00 0 0 0 0 0 0 0 0 0 0
components : 0.00 0.00 1 0 0 0 0 0 0 0 0 0
root node : - - - 0 - - 29 - - - - -
Constraints : Number MaxNumber #Separate #Propagate #EnfoLP #EnfoRelax #EnfoPS #Check #ResProp Cutoffs DomReds Cuts Applied Conss Children
benderslp : 0 0 0 0 146624 0 0 2093 0 0 0 0 0 0 0
integral : 0 0 0 0 146624 0 0 2093 0 0 0 0 0 0 0
linear : 268+ 271 10 654303 136164 0 0 2089 0 27513 1686248 0 0 0 0
bounddisjunction : 55 55 0 200862 136164 0 0 2086 0 0 107715 0 0 0 160934
quadratic : 179 179 270721 626790 146624 0 0 476 0 7 1599829 319558 224443 0 0
benders : 0 0 0 0 136164 0 0 1 0 0 0 0 0 0 0
countsols : 0 0 0 0 55697 0 0 1 0 0 0 0 0 0 0
components : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Constraint Timings : TotalTime SetupTime Separate Propagate EnfoLP EnfoPS EnfoRelax Check ResProp SB-Prop
benderslp : 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
integral : 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
linear : 8.00 0.00 0.00 6.00 2.00 0.00 0.00 0.00 0.00 0.00
bounddisjunction : 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
quadratic : 15.00 0.00 9.00 6.00 0.00 0.00 0.00 0.00 0.00 0.00
benders : 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
countsols : 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
components : 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Propagators : #Propagate #ResProp Cutoffs DomReds
dualfix : 3 0 0 0
genvbounds : 192530 0 1 148031
nlobbt : 0 0 0 0
obbt : 2 0 0 6
probing : 0 0 0 0
pseudoobj : 800580 0 0 8
redcost : 0 0 0 0
rootredcost : 3 0 0 9
symmetry : 0 0 0 0
vbounds : 0 0 0 0
Propagator Timings : TotalTime SetupTime Presolve Propagate ResProp SB-Prop
dualfix : 0.00 0.00 0.00 0.00 0.00 0.00
genvbounds : 0.00 0.00 0.00 0.00 0.00 0.00
nlobbt : 0.00 0.00 0.00 0.00 0.00 0.00
obbt : 0.00 0.00 0.00 0.00 0.00 0.00
probing : 0.00 0.00 0.00 0.00 0.00 0.00
pseudoobj : 1.00 0.00 0.00 1.00 0.00 0.00
redcost : 0.00 0.00 0.00 0.00 0.00 0.00
rootredcost : 0.00 0.00 0.00 0.00 0.00 0.00
symmetry : 0.00 0.00 0.00 0.00 0.00 0.00
vbounds : 0.00 0.00 0.00 0.00 0.00 0.00
Conflict Analysis : Time Calls Success DomReds Conflicts Literals Reconvs ReconvLits Dualrays Nonzeros LP Iters (pool size: [--,--])
propagation : 0.00 0 0 - 0 0.0 0 0.0 - - -
infeasible LP : 0.00 262 19 - 0 0.0 0 0.0 18 3.3 0
bound exceed. LP : 3.00 56250 0 - 0 0.0 0 0.0 0 0.0 0
strong branching : 0.00 0 0 - 0 0.0 0 0.0 - - 0
pseudo solution : 0.00 0 0 - 0 0.0 0 0.0 - - -
applied globally : 0.00 - - 1 0 0.0 - - 18 - -
applied locally : - - - 0 0 0.0 - - 0 - -
Separators : ExecTime SetupTime Calls Cutoffs DomReds Cuts Applied Conss
cut pool : 0.00 0 - - 0 - - (maximal pool size: 0)
aggregation : 0.00 0.00 0 0 0 0 0 0
cgmip : 0.00 0.00 0 0 0 0 0 0
clique : 0.00 0.00 0 0 0 0 0 0
closecuts : 0.00 0.00 0 0 0 0 0 0
cmir : 0.00 0.00 0 0 0 0 0 0
convexproj : 0.00 0.00 0 0 0 0 0 0
disjunctive : 0.00 0.00 0 0 0 0 0 0
eccuts : 0.00 0.00 0 0 0 0 0 0
flowcover : 0.00 0.00 0 0 0 0 0 0
gauge : 0.00 0.00 0 0 0 0 0 0
gomory : 0.00 0.00 0 0 0 0 0 0
impliedbounds : 0.00 0.00 0 0 0 0 0 0
intobj : 0.00 0.00 0 0 0 0 0 0
mcf : 0.00 0.00 0 0 0 0 0 0
oddcycle : 0.00 0.00 0 0 0 0 0 0
rapidlearning : 0.00 0.00 0 0 0 0 0 0
strongcg : 0.00 0.00 0 0 0 0 0 0
zerohalf : 0.00 0.00 0 0 0 0 0 0
Pricers : ExecTime SetupTime Calls Vars
problem variables: 0.00 - 0 0
Branching Rules : ExecTime SetupTime BranchLP BranchExt BranchPS Cutoffs DomReds Cuts Conss Children
allfullstrong : 0.00 0.00 0 0 0 0 0 0 0 0
cloud : 0.00 0.00 0 0 0 0 0 0 0 0
distribution : 0.00 0.00 0 0 0 0 0 0 0 0
fullstrong : 0.00 0.00 0 0 0 0 0 0 0 0
inference : 0.00 0.00 0 0 0 0 0 0 0 0
leastinf : 0.00 0.00 0 0 0 0 0 0 0 0
lookahead : 0.00 0.00 0 0 0 0 0 0 0 0
mostinf : 0.00 0.00 0 0 0 0 0 0 0 0
multaggr : 0.00 0.00 0 0 0 0 0 0 0 0
nodereopt : 0.00 0.00 0 0 0 0 0 0 0 0
pscost : 1.00 0.00 0 55695 0 0 0 0 0 111390
random : 0.00 0.00 0 0 0 0 0 0 0 0
relpscost : 0.00 0.00 0 0 0 0 0 0 0 0
vanillafullstrong: 0.00 0.00 0 0 0 0 0 0 0 0
Primal Heuristics : ExecTime SetupTime Calls Found Best
LP solutions : 0.00 - - 2 2
relax solutions : 0.00 - - 0 0
pseudo solutions : 0.00 - - 0 0
strong branching : 0.00 - - 0 0
actconsdiving : 0.00 0.00 0 0 0
adaptivediving : 0.00 0.00 258 0 0
alns : 0.00 0.00 9 0 0
bound : 0.00 0.00 0 0 0
clique : 0.00 0.00 0 0 0
coefdiving : 0.00 0.00 0 0 0
completesol : 0.00 0.00 0 0 0
conflictdiving : 0.00 0.00 268 0 0
crossover : 0.00 0.00 0 0 0
dins : 0.00 0.00 0 0 0
distributiondivin: 0.00 0.00 0 0 0
dualval : 0.00 0.00 0 0 0
farkasdiving : 0.00 0.00 0 0 0
feaspump : 0.00 0.00 0 0 0
fixandinfer : 0.00 0.00 0 0 0
fracdiving : 0.00 0.00 258 0 0
gins : 0.00 0.00 0 0 0
guideddiving : 0.00 0.00 0 0 0
indicator : 0.00 0.00 0 0 0
intdiving : 0.00 0.00 0 0 0
intshifting : 0.00 0.00 0 0 0
linesearchdiving : 0.00 0.00 255 0 0
localbranching : 0.00 0.00 0 0 0
locks : 0.00 0.00 0 0 0
lpface : 0.00 0.00 0 0 0
mpec : 0.00 0.00 0 0 0
multistart : 26.00 0.00 1 0 0
mutation : 0.00 0.00 0 0 0
nlpdiving : 0.00 0.00 0 0 0
objpscostdiving : 0.00 0.00 0 0 0
octane : 0.00 0.00 0 0 0
ofins : 0.00 0.00 0 0 0
oneopt : 0.00 0.00 0 0 0
padm : 0.00 0.00 0 0 0
proximity : 0.00 0.00 0 0 0
pscostdiving : 0.00 0.00 0 0 0
randrounding : 0.00 0.00 0 0 0
rens : 0.00 0.00 0 0 0
reoptsols : 0.00 0.00 0 0 0
repair : 0.00 0.00 0 0 0
rins : 0.00 0.00 0 0 0
rootsoldiving : 0.00 0.00 0 0 0
rounding : 0.00 0.00 0 0 0
shiftandpropagate: 0.00 0.00 0 0 0
shifting : 0.00 0.00 0 0 0
simplerounding : 0.00 0.00 0 0 0
subnlp : 13.00 0.00 25 0 0
trivial : 0.00 0.00 2 0 0
trivialnegation : 0.00 0.00 0 0 0
trustregion : 0.00 0.00 0 0 0
trysol : 0.00 0.00 0 0 0
twoopt : 0.00 0.00 0 0 0
undercover : 0.00 0.00 1 0 0
vbounds : 0.00 0.00 0 0 0
veclendiving : 0.00 0.00 0 0 0
zeroobj : 0.00 0.00 0 0 0
zirounding : 0.00 0.00 0 0 0
other solutions : - - - 0 -
Diving (single) : Calls Nodes LP Iters Backtracks Conflicts MinDepth MaxDepth AvgDepth RoundSols NLeafSols MinSolDpt MaxSolDpt AvgSolDpt
actconsdiving : 0 - - - - - - - - - - - -
coefdiving : 0 - - - - - - - - - - - -
conflictdiving : 268 0 0 0 0 10 52 24.9 0 - - - -
distributiondivin: 0 - - - - - - - - - - - -
farkasdiving : 0 - - - - - - - - - - - -
fracdiving : 258 0 0 0 0 8 52 25.8 0 - - - -
guideddiving : 0 - - - - - - - - - - - -
linesearchdiving : 255 0 0 0 0 8 52 25.6 0 - - - -
pscostdiving : 0 - - - - - - - - - - - -
veclendiving : 0 - - - - - - - - - - - -
Diving (adaptive) : Calls Nodes LP Iters Backtracks Conflicts MinDepth MaxDepth AvgDepth RoundSols NLeafSols MinSolDpt MaxSolDpt AvgSolDpt
actconsdiving : 0 - - - - - - - - - - - -
coefdiving : 46 0 0 0 0 11 51 24.0 0 - - - -
conflictdiving : 0 - - - - - - - - - - - -
distributiondivin: 0 - - - - - - - - - - - -
farkasdiving : 0 - - - - - - - - - - - -
fracdiving : 56 0 0 0 0 9 48 24.1 0 - - - -
guideddiving : 43 0 0 0 0 11 50 26.2 0 - - - -
linesearchdiving : 59 0 0 0 0 8 50 26.2 0 - - - -
pscostdiving : 0 - - - - - - - - - - - -
veclendiving : 54 0 0 0 0 11 52 24.9 0 - - - -
Neighborhoods : Calls SetupTime SolveTime SolveNodes Sols Best Exp3 EpsGreedy UCB TgtFixRate Opt Inf Node Stal Sol Usr Othr Actv
zeroobjective : 9 0.00 0.00 0 0 0 0.00000 -1.00000 0.52023 0.900 0 0 0 0 0 0 9 1
rens : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
rins : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
mutation : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
localbranching : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
crossover : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
proximity : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
dins : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
trustregion : 0 0.00 0.00 0 0 0 0.00000 -1.00000 1.00000 0.900 0 0 0 0 0 0 0 0
LP : Time Calls Iterations Iter/call Iter/sec Time-0-It Calls-0-It ItLimit
primal LP : 2.00 3779 12 3.00 6.00 2.00 3775
dual LP : 80.00 345034 841460 3.55 10518.25 17.00 107774
lex dual LP : 0.00 0 0 0.00 -
barrier LP : 0.00 0 0 0.00 - 0.00 0
resolve instable : 0.00 2 540 270.00 -
diving/probing LP: 0.00 353 11215 31.77 -
strong branching : 0.00 0 0 0.00 - - - 0
(at root node) : - 0 0 0.00 -
conflict analysis: 0.00 0 0 0.00 -
NLP : Time Calls
all NLPs : 0.00 0
B&B Tree :
number of runs : 1
nodes : 231096 (136162 internal, 94934 leaves)
feasible leaves : 2
infeas. leaves : 27775
objective leaves : 67156
nodes (total) : 231096 (136162 internal, 94934 leaves)
nodes left : 40018
max depth : 104
max depth (total): 104
backtracks : 39139 (16.9%)
early backtracks : 0 (0.0%)
nodes exc. ref. : 0 (0.0%)
delayed cutoffs : 0
repropagations : 300 (374 domain reductions, 0 cutoffs)
avg switch length: 8.70
switching time : 14.00
Estim. Tree Size : 464614
Estimation Tree : 272325 nodes (232307 visited, 136162 internal, 96145 leaves, 40018 open), weight: 0.7703 completed 0.7162
Estimations : estim value trend resolution smooth
wbe : 249622 - - - -
tree-profile : -1 - - - -
gap : 464614 0.97398 0.00000 128 464352
tree-weight : 464614 0.77032 0.00000 128 464352
leaf-frequency : 1889673 0.41387 0.00001 128 1879390
ssg : 464614 0.31513 -0.00000 128 464352
open-nodes : 464614 40018.00000 16.56581 128 464352
Root Node :
First LP value : -5.61775671324110e-01
First LP Iters : 367
First LP Time : 0.00
Final Dual Bound : -2.34180732949713e-01
Final Root Iters : 1901
Root LP Estimate : -2.30185933155962e-01
Solution :
Solutions found : 2 (2 improvements)
First Solution : -1.48600766997846e-01 (in run 1, after 602 nodes, 33.00 seconds, depth 21, found by <relaxation>)
Gap First Sol. : 53.04 %
Gap Last Sol. : 7.14 %
Primal Bound : -2.01879429012952e-01 (in run 1, after 2396 nodes, 42.00 seconds, depth 31, found by <relaxation>)
Dual Bound : -2.07273362411977e-01
Gap : 2.67 %
Integrals : Total Avg%
primal-dual : 4035.38 20.18
primal-ref : - - (not evaluated)
dual-ref : - - (not evaluated)
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