
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Wed Nov 13 03:19:22 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo156.21.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/grafo156.21.lp
Reading time = 0.02 seconds
: 5573 rows, 441 columns, 16872 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 5573 rows, 441 columns and 16872 nonzeros
Model fingerprint: 0x7f8571e5
Variable types: 18 continuous, 423 integer (423 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 -0.0000000
Presolve removed 877 rows and 21 columns
Presolve time: 0.05s
Presolved: 4696 rows, 420 columns, 14400 nonzeros
Variable types: 0 continuous, 420 integer (402 binary)
Found heuristic solution: objective 4.0000000

Root relaxation: objective 1.100000e+01, 111 iterations, 0.01 seconds (0.01 work units)

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

     0     0   11.00000    0   66    4.00000   11.00000   175%     -    0s
H    0     0                       5.0000000   11.00000   120%     -    0s
     0     0   11.00000    0  144    5.00000   11.00000   120%     -    0s
     0     0   11.00000    0  144    5.00000   11.00000   120%     -    0s
H    0     0                       6.0000000   11.00000  83.3%     -    0s
     0     0   10.33333    0  104    6.00000   10.33333  72.2%     -    0s
     0     0   10.33333    0  118    6.00000   10.33333  72.2%     -    0s
     0     0   10.00000    0  100    6.00000   10.00000  66.7%     -    0s
H    0     0                       7.0000000   10.00000  42.9%     -    0s
     0     0   10.00000    0   91    7.00000   10.00000  42.9%     -    0s
     0     0   10.00000    0   42    7.00000   10.00000  42.9%     -    1s
     0     0    9.66667    0   46    7.00000    9.66667  38.1%     -    1s
     0     0    9.66667    0   55    7.00000    9.66667  38.1%     -    1s
     0     0    9.66667    0   56    7.00000    9.66667  38.1%     -    1s
     0     0    9.66667    0   52    7.00000    9.66667  38.1%     -    1s
     0     0    9.66667    0   50    7.00000    9.66667  38.1%     -    1s
H    0     0                       8.0000000    9.66667  20.8%     -    1s
     0     2    9.66667    0   50    8.00000    9.66667  20.8%     -    1s

Cutting planes:
  Cover: 15
  MIR: 43
  StrongCG: 4
  GUB cover: 1
  Zero half: 6
  RLT: 19
  Relax-and-lift: 2

Explored 356 nodes (11998 simplex iterations) in 2.62 seconds (1.26 work units)
Thread count was 8 (of 8 available processors)

Solution count 6: 8 7 6 ... -0

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/grafo156.21.sol'

