
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 05:08:18 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3874.40.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/grafo3874.40.lp
Reading time = 0.09 seconds
: 56860 rows, 1726 columns, 171765 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 56860 rows, 1726 columns and 171765 nonzeros
Model fingerprint: 0xb7a1a3ad
Variable types: 38 continuous, 1688 integer (1688 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 1.0000000
Presolve removed 11395 rows and 30 columns
Presolve time: 0.40s
Presolved: 45465 rows, 1696 columns, 137935 nonzeros
Variable types: 0 continuous, 1696 integer (1658 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 27149 rows, 20012 columns, 101303 nonzeros


Root relaxation: objective 2.700000e+01, 1930 iterations, 0.65 seconds (0.64 work units)

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

     0     0   27.00000    0  350    7.00000   27.00000   286%     -    2s
H    0     0                       8.0000000   27.00000   237%     -    2s
H    0     0                       9.0000000   27.00000   200%     -    3s
H    0     0                      10.0000000   27.00000   170%     -    3s
     0     0   27.00000    0  423   10.00000   27.00000   170%     -    5s
     0     0   27.00000    0  428   10.00000   27.00000   170%     -    6s
H    0     0                      11.0000000   27.00000   145%     -   14s
     0     0   27.00000    0  284   11.00000   27.00000   145%     -   14s
     0     0   27.00000    0  264   11.00000   27.00000   145%     -   14s
H    0     0                      12.0000000   27.00000   125%     -   19s
     0     0   27.00000    0  330   12.00000   27.00000   125%     -   19s
     0     0   27.00000    0  312   12.00000   27.00000   125%     -   19s
     0     0   27.00000    0  369   12.00000   27.00000   125%     -   23s
     0     0   27.00000    0  345   12.00000   27.00000   125%     -   23s
     0     0   27.00000    0  404   12.00000   27.00000   125%     -   29s
H    0     0                      13.0000000   27.00000   108%     -   29s
     0     0   27.00000    0  391   13.00000   27.00000   108%     -   29s
H    0     0                      14.0000000   27.00000  92.9%     -   50s
H    0     0                      15.0000000   27.00000  80.0%     -   50s
     0     0   27.00000    0  407   15.00000   27.00000  80.0%     -   50s

Cutting planes:
  Cover: 3
  Clique: 7
  MIR: 27
  StrongCG: 1
  GUB cover: 1
  RLT: 20

Explored 1 nodes (61170 simplex iterations) in 50.11 seconds (46.39 work units)
Thread count was 8 (of 8 available processors)

Solution count 10: 15 14 13 ... 1

Time limit reached
Best objective 1.500000000000e+01, best bound 2.700000000000e+01, gap 80.0000%

Wrote result file './lp_solutions/grafo3874.40.sol'

