
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Wed Nov 13 03:51:56 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1982.15.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/grafo1982.15.lp
Reading time = 0.01 seconds
: 2695 rows, 273 columns, 8178 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 2695 rows, 273 columns and 8178 nonzeros
Model fingerprint: 0xff308fd5
Variable types: 15 continuous, 258 integer (258 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 575 rows and 12 columns
Presolve time: 0.03s
Presolved: 2120 rows, 261 columns, 6558 nonzeros
Variable types: 0 continuous, 261 integer (246 binary)
Found heuristic solution: objective 3.0000000

Root relaxation: objective 9.000000e+00, 165 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    9.00000    0   30    3.00000    9.00000   200%     -    0s
H    0     0                       4.0000000    9.00000   125%     -    0s
H    0     0                       5.0000000    9.00000  80.0%     -    0s
     0     0    9.00000    0   35    5.00000    9.00000  80.0%     -    0s
     0     0    9.00000    0   55    5.00000    9.00000  80.0%     -    0s
     0     0    9.00000    0   56    5.00000    9.00000  80.0%     -    0s
H    0     0                       6.0000000    9.00000  50.0%     -    0s
     0     0    8.50000    0   62    6.00000    8.50000  41.7%     -    0s
     0     0    8.00000    0   53    6.00000    8.00000  33.3%     -    0s
     0     0    8.00000    0   46    6.00000    8.00000  33.3%     -    0s
     0     0    8.00000    0   46    6.00000    8.00000  33.3%     -    0s
     0     0    7.66667    0   51    6.00000    7.66667  27.8%     -    0s
     0     0    7.66667    0   51    6.00000    7.66667  27.8%     -    0s
     0     2    7.66667    0   51    6.00000    7.66667  27.8%     -    0s
*  531    62              17       7.0000000    7.66667  9.52%  32.2    1s

Cutting planes:
  Cover: 9
  Clique: 3
  MIR: 55
  GUB cover: 4
  Inf proof: 8
  Zero half: 1
  Mod-K: 1
  RLT: 16
  BQP: 1
  PSD: 1

Explored 542 nodes (20041 simplex iterations) in 1.56 seconds (0.91 work units)
Thread count was 8 (of 8 available processors)

Solution count 6: 7 6 5 ... 1

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0000%

Wrote result file './lp_solutions/grafo1982.15.sol'

