
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Wed Nov 13 13:29:32 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1831.17.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/grafo1831.17.lp
Reading time = 0.01 seconds
: 3273 rows, 285 columns, 9912 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 3273 rows, 285 columns and 9912 nonzeros
Model fingerprint: 0x40142c06
Variable types: 13 continuous, 272 integer (272 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 4.0000000
Presolve removed 753 rows and 7 columns
Presolve time: 0.03s
Presolved: 2520 rows, 278 columns, 7753 nonzeros
Variable types: 0 continuous, 278 integer (265 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 8.000000e+00, 117 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    8.00000    0   33    5.00000    8.00000  60.0%     -    0s
     0     0    8.00000    0   68    5.00000    8.00000  60.0%     -    0s
     0     0    8.00000    0   67    5.00000    8.00000  60.0%     -    0s
H    0     0                       6.0000000    8.00000  33.3%     -    0s
     0     0    7.85714    0   42    6.00000    7.85714  31.0%     -    0s
     0     0    7.85714    0   30    6.00000    7.85714  31.0%     -    0s
     0     0    7.83333    0   32    6.00000    7.83333  30.6%     -    0s
     0     0    7.75000    0   35    6.00000    7.75000  29.2%     -    0s
     0     0    7.50000    0   30    6.00000    7.50000  25.0%     -    0s
     0     0    7.50000    0   31    6.00000    7.50000  25.0%     -    0s
     0     0    7.50000    0   31    6.00000    7.50000  25.0%     -    0s
     0     2    7.50000    0   31    6.00000    7.50000  25.0%     -    0s

Cutting planes:
  Gomory: 3
  Cover: 25
  Clique: 3
  MIR: 31
  Inf proof: 76
  Zero half: 5
  RLT: 13
  Relax-and-lift: 1

Explored 1418 nodes (48228 simplex iterations) in 3.02 seconds (1.31 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 6 5 4 

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0000%

Wrote result file './lp_solutions/grafo1831.17.sol'

