
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 04:33:37 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7401.40.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/grafo7401.40.lp
Reading time = 0.09 seconds
: 57815 rows, 2022 columns, 175075 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 57815 rows, 2022 columns and 175075 nonzeros
Model fingerprint: 0x66fff325
Variable types: 44 continuous, 1978 integer (1978 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]
Presolve removed 6914 rows and 27 columns
Presolve time: 0.38s
Presolved: 50901 rows, 1995 columns, 154765 nonzeros
Variable types: 0 continuous, 1995 integer (1951 binary)
Root relaxation presolved: 27777 rows, 25119 columns, 108517 nonzeros


Root relaxation: objective 4.100000e+01, 2913 iterations, 1.15 seconds (1.04 work units)

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

     0     0   41.00000    0  489          -   41.00000      -     -    3s
H    0     0                       5.0000000   41.00000   720%     -    5s
H    0     0                       7.0000000   41.00000   486%     -    5s
H    0     0                       8.0000000   41.00000   412%     -    5s
     0     0   41.00000    0  704    8.00000   41.00000   412%     -   10s
H    0     0                       9.0000000   41.00000   356%     -   10s
     0     0   41.00000    0  681    9.00000   41.00000   356%     -   11s
H    0     0                      11.0000000   41.00000   273%     -   33s
H    0     0                      12.0000000   41.00000   242%     -   33s
H    0     0                      14.0000000   41.00000   193%     -   33s
H    0     0                      15.0000000   41.00000   173%     -   33s
H    0     0                      16.0000000   41.00000   156%     -   33s
     0     0   41.00000    0  436   16.00000   41.00000   156%     -   33s
     0     0   41.00000    0  417   16.00000   41.00000   156%     -   33s
H    0     0                      17.0000000   41.00000   141%     -   45s
     0     0   41.00000    0  441   17.00000   41.00000   141%     -   45s
     0     0   41.00000    0  470   17.00000   41.00000   141%     -   46s
     0     0          -    0        17.00000   41.00000   141%     -   50s

Cutting planes:
  Gomory: 1
  Lift-and-project: 1
  Cover: 32
  MIR: 115
  GUB cover: 8
  Inf proof: 1
  Zero half: 50
  RLT: 52

Explored 1 nodes (59469 simplex iterations) in 50.06 seconds (45.72 work units)
Thread count was 8 (of 8 available processors)

Solution count 10: 17 16 15 ... 5

Time limit reached
Best objective 1.700000000000e+01, best bound 4.100000000000e+01, gap 141.1765%

Wrote result file './lp_solutions/grafo7401.40.sol'

