
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 02:37:26 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1600.28.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/grafo1600.28.lp
Reading time = 0.14 seconds
: 71635 rows, 1129 columns, 215735 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 71635 rows, 1129 columns and 215735 nonzeros
Model fingerprint: 0xca25509b
Variable types: 30 continuous, 1099 integer (1099 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 34620 rows and 8 columns
Presolve time: 0.44s
Presolved: 37015 rows, 1121 columns, 112187 nonzeros
Variable types: 0 continuous, 1121 integer (1091 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 1119 rows, 38134 columns, 113308 nonzeros


Root relaxation: objective 3.800000e+01, 1699 iterations, 0.42 seconds (0.52 work units)

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

     0     0   38.00000    0  396    8.00000   38.00000   375%     -    4s
     0     0   38.00000    0  513    8.00000   38.00000   375%     -    9s
     0     0   38.00000    0  516    8.00000   38.00000   375%     -    9s
H    0     0                      10.0000000   38.00000   280%     -   21s
     0     0   38.00000    0  489   10.00000   38.00000   280%     -   21s
     0     0   38.00000    0  464   10.00000   38.00000   280%     -   21s
H    0     0                      11.0000000   38.00000   245%     -   30s
     0     0   38.00000    0  544   11.00000   38.00000   245%     -   30s
     0     0   38.00000    0  525   11.00000   38.00000   245%     -   31s
H    0     0                      12.0000000   38.00000   217%     -   39s
     0     0   38.00000    0  482   12.00000   38.00000   217%     -   39s
     0     0   38.00000    0  489   12.00000   38.00000   217%     -   40s
H    0     0                      13.0000000   38.00000   192%     -   48s
     0     0   38.00000    0  505   13.00000   38.00000   192%     -   48s
     0     0   38.00000    0  451   13.00000   38.00000   192%     -   48s
     0     0   38.00000    0  478   13.00000   38.00000   192%     -   50s

Cutting planes:
  Cover: 4
  Clique: 9
  MIR: 132
  StrongCG: 1
  Zero half: 37
  RLT: 60

Explored 1 nodes (56867 simplex iterations) in 50.03 seconds (50.35 work units)
Thread count was 8 (of 8 available processors)

Solution count 6: 13 12 11 ... 4

Time limit reached
Best objective 1.300000000000e+01, best bound 3.800000000000e+01, gap 192.3077%

Wrote result file './lp_solutions/grafo1600.28.sol'

