
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 05:15:19 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6112.36.log"
Using license file /Users/sara/gurobi.lic
Academic license - for non-commercial use only - expires 2025-05-12

Gurobi Optimizer version 11.0.1 build v11.0.1rc0 (mac64[x86] - Darwin 21.6.0 21G651)
Copyright (c) 2024, Gurobi Optimization, LLC

Read LP format model from file ./lp_problems/grafo6112.36.lp
Reading time = 0.30 seconds
: 183575 rows, 2025 columns, 552516 nonzeros

CPU model: Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
Thread count: 4 physical cores, 8 logical processors, using up to 8 threads

Optimize a model with 183575 rows, 2025 columns and 552516 nonzeros
Model fingerprint: 0x6a3ccb70
Variable types: 45 continuous, 1980 integer (1980 binary)
Coefficient statistics:
  Matrix range     [5e-01, 5e+01]
  Objective range  [1e+00, 1e+00]
  Bounds range     [1e+00, 1e+00]
  RHS range        [1e+00, 5e+01]
Found heuristic solution: objective 3.0000000
Presolve removed 76280 rows and 32 columns
Presolve time: 1.43s
Presolved: 107295 rows, 1993 columns, 324079 nonzeros
Variable types: 0 continuous, 1993 integer (1948 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 1993 rows, 109288 columns, 326072 nonzeros


Starting sifting (using dual simplex for sub-problems)...

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        474    -infinity     -4.0000739e+00      2s
       1       4690  -3.1893791e+02  -4.0221396e+00      3s
       2      10259  -3.0340042e+02  -4.1373142e+00      3s
       3      17654  -2.8096481e+02  -4.1437346e+00      4s
       4      24569  -2.8048389e+02  -4.1609637e+00      5s
       5      32409  -2.8005341e+02  -4.1985303e+00      6s
       6      38990  -2.8005225e+02  -4.2161052e+00      7s
       7      43512  -5.7068904e+01  -4.2177451e+00      8s
       8      46597  -4.3028128e+01  -4.2203167e+00      8s
       9      49258  -4.3028128e+01  -4.2395936e+00      8s
      10      52321  -4.3028128e+01  -4.2670141e+00      8s
      11      55104  -4.3028128e+01  -4.2774494e+00      9s
      12      58060  -4.3028128e+01  -4.2865366e+00      9s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   60994    4.3000000e+01   0.000000e+00   6.660394e+02      9s
   66420    4.3000000e+01   0.000000e+00   3.016905e+02     10s
   83913    4.3000000e+01   0.000000e+00   0.000000e+00     14s
   83913    4.3000000e+01   0.000000e+00   0.000000e+00     14s

Root relaxation: objective 4.300000e+01, 83913 iterations, 12.50 seconds (10.79 work units)
Total elapsed time = 34.77s (DegenMoves)
Total elapsed time = 36.58s (DegenMoves)

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   43.00000    0  555    7.00000   43.00000   514%     -   39s
H    0     0                      10.0000000   43.00000   330%     -   39s
     0     0          -    0        10.00000   43.00000   330%     -   50s

Cutting planes:
  Gomory: 29
  Cover: 49
  Clique: 41
  MIR: 116
  StrongCG: 1
  GUB cover: 5
  Zero half: 42
  RLT: 97
  BQP: 13

Explored 1 nodes (102355 simplex iterations) in 50.02 seconds (52.94 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 10 7 3 

Time limit reached
Best objective 1.000000000000e+01, best bound 4.300000000000e+01, gap 330.0000%

Wrote result file './lp_solutions/grafo6112.36.sol'

