
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Wed Nov 13 06:00:02 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo508.20.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/grafo508.20.lp
Reading time = 0.01 seconds
: 4338 rows, 386 columns, 13141 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 4338 rows, 386 columns and 13141 nonzeros
Model fingerprint: 0x903ec8ab
Variable types: 16 continuous, 370 integer (370 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 600 rows and 12 columns
Presolve time: 0.04s
Presolved: 3738 rows, 374 columns, 11443 nonzeros
Variable types: 0 continuous, 374 integer (358 binary)

Root relaxation: objective 1.200000e+01, 337 iterations, 0.03 seconds (0.02 work units)

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

     0     0   12.00000    0   45          -   12.00000      -     -    0s
H    0     0                       7.0000000   12.00000  71.4%     -    0s
H    0     0                       8.0000000   12.00000  50.0%     -    0s
     0     0   12.00000    0   88    8.00000   12.00000  50.0%     -    0s
     0     0   11.66667    0   77    8.00000   11.66667  45.8%     -    0s
     0     0   11.66667    0   72    8.00000   11.66667  45.8%     -    0s
     0     0   11.33333    0   60    8.00000   11.33333  41.7%     -    0s
     0     0   11.33333    0   60    8.00000   11.33333  41.7%     -    0s
     0     0   11.16667    0   67    8.00000   11.16667  39.6%     -    0s
     0     0   11.16667    0   77    8.00000   11.16667  39.6%     -    0s
     0     0   11.00000    0   74    8.00000   11.00000  37.5%     -    0s
     0     0   11.00000    0   70    8.00000   11.00000  37.5%     -    0s
     0     0   11.00000    0   47    8.00000   11.00000  37.5%     -    0s
     0     0   11.00000    0   45    8.00000   11.00000  37.5%     -    0s
     0     2   11.00000    0   39    8.00000   11.00000  37.5%     -    1s

Cutting planes:
  Gomory: 1
  Lift-and-project: 1
  Cover: 20
  Clique: 2
  MIR: 59
  StrongCG: 3
  Inf proof: 44
  Zero half: 14
  RLT: 22

Explored 2745 nodes (69362 simplex iterations) in 4.77 seconds (2.67 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 7 

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0000%

Wrote result file './lp_solutions/grafo508.20.sol'

