How to use MinRel heuristic directly after root relaxation?
回答済みHi, Gurobi Support Center,
I have a very complex model with lots of constraints and variables. Optimizer is taking a lot of time to find even a single feasible solution. It only finds a solution after using MinRel heuristic. Is there any way of directly using MinRel heuristic at the start of finding a solution. I have set MIPFocus to 1. Though I tried other parameters like NodeMethod, ImproveStartNodes, Presolve, Heuristics, etc I was unable to reduce time taken by Gurobi Optimizer to find a feasible solution. I do understand that I am working with NP-Hard problems and it might take time but I am only asking if there is a way to directly apply MinRel heuristic.
Thanks for helping!
Gurobi 10.0.0 (mac64[arm]) logging started Fri Jul 14 00:09:08 2023
Set parameter LogFile to value "m.log"
Set parameter TimeLimit to value 1e+100
Set parameter MIPFocus to value 1
Gurobi Optimizer version 10.0.0 build v10.0.0rc2 (mac64[arm])
CPU model: Apple M1 Pro
Thread count: 10 physical cores, 10 logical processors, using up to 10 threads
Optimize a model with 247396 rows, 178178 columns and 17998410 nonzeros
Model fingerprint: 0xfd70ab14
Model has 203746 general constraints
Variable types: 0 continuous, 178178 integer (178178 binary)
Coefficient statistics:
Matrix range [1e+00, 1e+00]
Objective range [0e+00, 0e+00]
Bounds range [1e+00, 1e+00]
RHS range [1e+00, 6e+00]
GenCon rhs range [1e+00, 5e+00]
GenCon coe range [1e+00, 1e+00]
Presolve removed 219160 rows and 128520 columns (presolve time = 6s) ...
Presolve removed 293235 rows and 143077 columns (presolve time = 10s) ...
Presolve removed 293790 rows and 143077 columns (presolve time = 15s) ...
Presolve removed 512739 rows and 316768 columns (presolve time = 20s) ...
Presolve removed 204723 rows and 125245 columns
Presolve time: 22.58s
Presolved: 42673 rows, 52933 columns, 646333 nonzeros
Variable types: 0 continuous, 52933 integer (51308 binary)
Deterministic concurrent LP optimizer: primal simplex, dual simplex, and barrier
Showing barrier log only...
Root barrier log...
Ordering time: 1.12s
Barrier statistics:
AA' NZ : 1.882e+06
Factor NZ : 2.747e+07 (roughly 260 MB of memory)
Factor Ops : 2.880e+10 (less than 1 second per iteration)
Threads : 8
Objective Residual
Iter Primal Dual Primal Dual Compl Time
0 0.00000000e+00 -1.18800000e+02 5.12e+03 0.00e+00 5.24e-01 25s
1 0.00000000e+00 -1.06153201e+03 2.20e+03 2.05e-02 2.24e-01 25s
2 0.00000000e+00 -1.21408807e+03 3.45e+02 4.07e-15 3.99e-02 25s
3 0.00000000e+00 -4.21302825e+02 5.27e+01 2.71e-15 6.60e-03 25s
4 0.00000000e+00 -8.94484550e+01 4.29e+00 1.25e-15 8.66e-04 25s
5 0.00000000e+00 -5.86120474e+01 1.39e-01 8.19e-16 4.24e-04 25s
6 0.00000000e+00 -3.97067937e-01 2.68e-03 1.62e-16 2.83e-06 26s
7 0.00000000e+00 -3.97009714e-04 4.56e-05 1.23e-18 2.83e-09 26s
8 0.00000000e+00 -3.97008834e-07 5.56e-07 9.55e-22 2.83e-12 26s
9 0.00000000e+00 -3.97008840e-10 1.03e-10 1.06e-24 2.83e-15 26s
Barrier solved model in 9 iterations and 26.07 seconds (58.45 work units)
Optimal objective 0.00000000e+00
Root crossover log...
75 DPushes remaining with DInf 0.0000000e+00 26s
45522 PPushes remaining with PInf 0.0000000e+00 26s
0 PPushes remaining with PInf 0.0000000e+00 27s
Push phase complete: Pinf 0.0000000e+00, Dinf 0.0000000e+00 27s
Root simplex log...
Iteration Objective Primal Inf. Dual Inf. Time
45525 0.0000000e+00 0.000000e+00 0.000000e+00 27s
Concurrent spin time: 0.59s (can be avoided by choosing Method=3)
Solved with barrier
45525 0.0000000e+00 0.000000e+00 0.000000e+00 28s
Root relaxation: objective 0.000000e+00, 45525 iterations, 5.07 seconds (10.83 work units)
Total elapsed time = 41.94s
Total elapsed time = 50.81s
Total elapsed time = 57.95s
Total elapsed time = 63.51s
Nodes | Current Node | Objective Bounds | Work
Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time
0 0 0.00000 0 1986 - 0.00000 - - 68s
0 0 0.00000 0 4119 - 0.00000 - - 87s
0 0 0.00000 0 4121 - 0.00000 - - 93s
0 0 0.00000 0 1626 - 0.00000 - - 160s
0 0 0.00000 0 2962 - 0.00000 - - 171s
0 0 0.00000 0 1766 - 0.00000 - - 235s
0 0 0.00000 0 3067 - 0.00000 - - 245s
0 0 0.00000 0 2233 - 0.00000 - - 325s
0 0 0.00000 0 3154 - 0.00000 - - 336s
0 0 0.00000 0 1494 - 0.00000 - - 412s
0 2 0.00000 0 1494 - 0.00000 - - 507s
1 4 0.00000 1 2109 - 0.00000 - 31042 516s
3 8 0.00000 2 3158 - 0.00000 - 16351 620s
7 16 0.00000 3 3815 - 0.00000 - 14038 653s
15 26 0.00000 4 3828 - 0.00000 - 14977 695s
25 36 0.00000 5 3566 - 0.00000 - 17639 700s
45 56 0.00000 7 3309 - 0.00000 - 11525 709s
55 67 0.00000 8 3282 - 0.00000 - 9887 714s
70 108 0.00000 9 3228 - 0.00000 - 8344 763s
129 183 0.00000 11 1170 - 0.00000 - 7061 801s
323 249 infeasible 17 - 0.00000 - 4458 853s
517 308 0.00000 17 2392 - 0.00000 - 4173 936s
708 409 0.00000 26 2001 - 0.00000 - 3985 1026s
1093 530 0.00000 26 1883 - 0.00000 - 3726 1136s
1594 628 infeasible 22 - 0.00000 - 3643 1282s
2151 725 0.00000 30 1580 - 0.00000 - 3658 1460s
2729 792 0.00000 24 1740 - 0.00000 - 3734 1617s
3231 874 0.00000 37 2053 - 0.00000 - 3874 1800s
3759 987 0.00000 36 1889 - 0.00000 - 3961 2005s
4431 1101 0.00000 28 2094 - 0.00000 - 3938 2197s
5150 1216 infeasible 32 - 0.00000 - 3910 2394s
5880 1253 infeasible 38 - 0.00000 - 3915 2643s
6513 1328 0.00000 43 1810 - 0.00000 - 3929 2852s
7310 1414 0.00000 45 1700 - 0.00000 - 3906 3075s
8143 1415 0.00000 29 1494 - 0.00000 - 3898 3195s
8145 1416 0.00000 22 1796 - 0.00000 - 3897 3274s
8146 1417 0.00000 20 3146 - 0.00000 - 3897 3290s
8148 1418 0.00000 27 1800 - 0.00000 - 3896 3371s
8149 1419 0.00000 18 2075 - 0.00000 - 3895 3391s
8150 1420 0.00000 28 1656 - 0.00000 - 3895 3453s
8151 1420 0.00000 23 1897 - 0.00000 - 3894 3468s
8152 1421 0.00000 17 1670 - 0.00000 - 3894 3520s
8153 1422 0.00000 30 1749 - 0.00000 - 3893 3533s
8154 1422 0.00000 17 2046 - 0.00000 - 3893 3566s
8155 1423 0.00000 38 2046 - 0.00000 - 3892 4361s
8156 1427 0.00000 11 1136 - 0.00000 - 66.6 4415s
8158 1430 0.00000 12 1161 - 0.00000 - 68.5 4426s
8162 1437 0.00000 13 2715 - 0.00000 - 74.8 4453s
8170 1444 0.00000 14 2550 - 0.00000 - 93.5 4457s
8180 1451 0.00000 15 2349 - 0.00000 - 97.7 4460s
8190 1457 0.00000 16 1778 - 0.00000 - 101 4474s
8200 1464 0.00000 17 1733 - 0.00000 - 109 4476s
8227 1485 0.00000 20 1587 - 0.00000 - 115 4484s
8240 1520 0.00000 21 1512 - 0.00000 - 119 4498s
8285 1522 0.00000 25 1607 - 0.00000 - 136 4528s
8336 1556 0.00000 26 1659 - 0.00000 - 160 4560s
8435 1549 0.00000 32 1576 - 0.00000 - 202 4618s
8568 1556 infeasible 37 - 0.00000 - 252 4702s
8841 1559 0.00000 45 1833 - 0.00000 - 331 4798s
9307 1482 infeasible 47 - 0.00000 - 419 4907s
9785 1389 0.00000 54 1356 - 0.00000 - 512 5036s
10338 1290 infeasible 45 - 0.00000 - 614 5181s
10993 1153 infeasible 55 - 0.00000 - 716 5334s
11740 973 infeasible 61 - 0.00000 - 811 5488s
12335 812 infeasible 58 - 0.00000 - 895 5649s
12993 878 infeasible 52 - 0.00000 - 977 5818s
13729 988 infeasible 50 - 0.00000 - 1055 5993s
14481 1059 0.00000 57 1636 - 0.00000 - 1128 6174s
15176 1131 0.00000 53 1550 - 0.00000 - 1199 6363s
15890 1224 0.00000 56 1503 - 0.00000 - 1269 6562s
16589 1328 0.00000 51 1111 - 0.00000 - 1335 6779s
17401 1418 infeasible 56 - 0.00000 - 1400 7006s
18147 1477 infeasible 58 - 0.00000 - 1465 7256s
18966 1548 infeasible 66 - 0.00000 - 1534 7520s
19891 1584 0.00000 44 1132 - 0.00000 - 1601 7793s
20811 1699 infeasible 57 - 0.00000 - 1662 8083s
21882 1734 0.00000 59 1321 - 0.00000 - 1716 8378s
22939 1776 infeasible 63 - 0.00000 - 1770 8686s
24066 1922 0.00000 60 1607 - 0.00000 - 1818 9006s
25313 1949 infeasible 60 - 0.00000 - 1859 9337s
26567 2043 infeasible 52 - 0.00000 - 1900 9680s
27963 2158 0.00000 66 1559 - 0.00000 - 1933 10034s
29385 2342 infeasible 46 - 0.00000 - 1967 10400s
30822 2463 0.00000 66 1601 - 0.00000 - 1996 10779s
32423 2611 infeasible 51 - 0.00000 - 2019 11165s
34186 2732 0.00000 49 1032 - 0.00000 - 2035 11557s
35844 2903 infeasible 72 - 0.00000 - 2055 11905s
37320 2947 0.00000 55 1700 - 0.00000 - 2066 12255s
38902 3046 infeasible 61 - 0.00000 - 2079 12604s
40345 3201 infeasible 50 - 0.00000 - 2095 12953s
41834 3292 infeasible 50 - 0.00000 - 2108 13300s
43287 3440 infeasible 59 - 0.00000 - 2119 13650s
44756 3526 0.00000 68 1291 - 0.00000 - 2134 13996s
46147 3638 0.00000 67 1533 - 0.00000 - 2148 14345s
47725 3701 infeasible 65 - 0.00000 - 2155 14694s
49338 3820 infeasible 65 - 0.00000 - 2160 15035s
50954 3896 0.00000 65 1012 - 0.00000 - 2163 15408s
52549 3999 0.00000 66 1442 - 0.00000 - 2174 15752s
54078 4130 0.00000 59 1493 - 0.00000 - 2182 16089s
55246 4130 0.00000 74 1294 - 0.00000 - 2188 16090s
55606 4220 infeasible 73 - 0.00000 - 2188 16423s
57095 4282 infeasible 62 - 0.00000 - 2194 16758s
58627 4367 infeasible 72 - 0.00000 - 2200 17093s
60176 4433 infeasible 50 - 0.00000 - 2204 17426s
61691 4478 infeasible 73 - 0.00000 - 2209 17761s
63254 4560 infeasible 70 - 0.00000 - 2212 18095s
64782 4576 infeasible 64 - 0.00000 - 2215 18426s
66265 4724 0.00000 73 1790 - 0.00000 - 2217 18760s
67794 4725 0.00000 62 1494 - 0.00000 - 2219 18846s
Exploring 50000 nodes in MinRel heuristic
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18890s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18895s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18900s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18905s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18910s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18915s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18920s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18925s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18930s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18935s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18940s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18945s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18950s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18955s
MinRel: 0 nodes explored, relaxation 1.00e+100, total elapsed time 18960s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 18966s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 18970s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 18975s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 18980s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 18985s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 18990s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 18995s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19000s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19005s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19010s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19015s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19020s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19025s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19030s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19035s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19040s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19045s
MinRel: 0 nodes explored, relaxation 1.24e+02, total elapsed time 19050s
MinRel: 0 nodes explored, relaxation 7.00e+01, total elapsed time 19055s
MinRel: 0 nodes explored, relaxation 7.00e+01, total elapsed time 19060s
MinRel: 0 nodes explored, relaxation 7.00e+01, total elapsed time 19065s
MinRel: 0 nodes explored, relaxation 7.00e+01, total elapsed time 19070s
MinRel: 0 nodes explored, relaxation 7.00e+01, total elapsed time 19075s
MinRel: 0 nodes explored, relaxation 7.00e+01, total elapsed time 19080s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19085s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19090s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19095s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19100s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19105s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19110s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19115s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19120s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19125s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19130s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19135s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19140s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19145s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19150s
MinRel: 0 nodes explored, relaxation 6.30e+01, total elapsed time 19155s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19160s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19165s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19170s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19175s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19180s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19185s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19190s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19195s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19200s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19205s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19210s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19215s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19220s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19225s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19230s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19235s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19240s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19245s
MinRel: 0 nodes explored, relaxation 4.80e+01, total elapsed time 19250s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19255s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19260s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19265s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19270s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19275s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19280s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19285s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19290s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19295s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19300s
MinRel: 0 nodes explored, relaxation 1.90e+01, total elapsed time 19305s
MinRel: 2 nodes explored, relaxation 1.90e+01, total elapsed time 19310s
MinRel: 2 nodes explored, relaxation 1.90e+01, total elapsed time 19315s
MinRel: 6 nodes explored, relaxation 1.90e+01, total elapsed time 19320s
MinRel: 6 nodes explored, relaxation 1.90e+01, total elapsed time 19325s
MinRel: 6 nodes explored, relaxation 1.90e+01, total elapsed time 19330s
MinRel: 6 nodes explored, relaxation 1.90e+01, total elapsed time 19335s
MinRel: 14 nodes explored, relaxation 1.90e+01, total elapsed time 19340s
...
MinRel: 29975 nodes explored, relaxation 1.00e+00, total elapsed time 46970s
MinRel: 29975 nodes explored, relaxation 1.00e+00, total elapsed time 46975s
MinRel: 29975 nodes explored, relaxation 1.00e+00, total elapsed time 46980s
MinRel: 29975 nodes explored, relaxation 1.00e+00, total elapsed time 46985s
MinRel: 29975 nodes explored, relaxation 1.00e+00, total elapsed time 46990s
MinRel: 29975 nodes explored, relaxation 1.00e+00, total elapsed time 46995s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47000s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47005s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47010s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47015s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47020s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47025s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47030s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47035s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47040s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47045s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47050s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47055s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47060s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47065s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47070s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47075s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47080s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47085s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47090s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47095s
MinRel: 31138 nodes explored, relaxation 1.00e+00, total elapsed time 47100s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47105s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47110s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47115s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47120s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47125s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47130s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47135s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47140s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47145s
MinRel: 33466 nodes explored, relaxation 1.00e+00, total elapsed time 47150s
H67795 4489 0.0000000 0.00000 0.00% 2219 47154s
Feasible solution found by MinRel heuristic at node 35795
Explored 67795 nodes (182857283 simplex iterations) in 47155.06 seconds (112543.62 work units)
Thread count was 10 (of 10 available processors)
Solution count 1: 0
Optimal solution found (tolerance 1.00e-04)
Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0000%
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Gurobi Staff
This post is more than two years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support. -
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Hi Cebajel,
Have you tried explicitly setting the number of nodes explored by the MinRel heuristic with the MinRelNodes parameter? This heuristic is only applied at the end of the root node, but triggering it explicitly with the parameter might help.
Best regards,
Elisabeth
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You can also try other heuristics such as:
They might also be effective for your problem.
Cheers,
David0 -
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Thanks Elisabeth and David!
MinRelNodes accomplished the task. And I tried NoRelHeurTime and ZeroObjNodes but it didn't helped in reducing the runtime. PumpPasses is yet to try. But I am in a lot better position now.
Thanks.1 -
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