
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 05:10:31 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7331.41.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/grafo7331.41.lp
Reading time = 0.09 seconds
: 55859 rows, 1990 columns, 169124 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 55859 rows, 1990 columns and 169124 nonzeros
Model fingerprint: 0xec6e80e6
Variable types: 43 continuous, 1947 integer (1947 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 7.0000000
Presolve removed 5851 rows and 28 columns
Presolve time: 0.37s
Presolved: 50008 rows, 1962 columns, 151921 nonzeros
Variable types: 0 continuous, 1962 integer (1919 binary)
Found heuristic solution: objective 12.0000000
Root relaxation presolved: 27007 rows, 24963 columns, 105919 nonzeros


Root relaxation: objective 3.900000e+01, 2989 iterations, 0.99 seconds (0.90 work units)

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

     0     0   39.00000    0  431   12.00000   39.00000   225%     -    4s
H    0     0                      14.0000000   39.00000   179%     -    4s
H    0     0                      15.0000000   39.00000   160%     -    4s
     0     0   39.00000    0  621   15.00000   39.00000   160%     -    9s
     0     0   39.00000    0  630   15.00000   39.00000   160%     -   10s
H    0     0                      16.0000000   39.00000   144%     -   12s
     0     0   39.00000    0  556   16.00000   39.00000   144%     -   20s
     0     0   39.00000    0  526   16.00000   39.00000   144%     -   20s
H    0     0                      17.0000000   39.00000   129%     -   30s
H    0     0                      18.0000000   39.00000   117%     -   30s
     0     0   39.00000    0  552   18.00000   39.00000   117%     -   30s
     0     0   39.00000    0  556   18.00000   39.00000   117%     -   31s
H    0     0                      19.0000000   39.00000   105%     -   36s
     0     0   39.00000    0  378   19.00000   39.00000   105%     -   36s
     0     0   39.00000    0  373   19.00000   39.00000   105%     -   36s
H    0     0                      20.0000000   39.00000  95.0%     -   43s
H    0     0                      21.0000000   39.00000  85.7%     -   43s
     0     0   38.83333    0  399   21.00000   38.83333  84.9%     -   43s
     0     0   38.83333    0  393   21.00000   38.83333  84.9%     -   43s
     0     0   38.83333    0  577   21.00000   38.83333  84.9%     -   50s

Cutting planes:
  Cover: 34
  Clique: 3
  MIR: 82
  StrongCG: 1
  GUB cover: 3
  Inf proof: 1
  Zero half: 36
  RLT: 55
  BQP: 1

Explored 1 nodes (69616 simplex iterations) in 50.04 seconds (44.48 work units)
Thread count was 8 (of 8 available processors)

Solution count 10: 21 20 19 ... 7

Time limit reached
Best objective 2.100000000000e+01, best bound 3.800000000000e+01, gap 80.9524%

Wrote result file './lp_solutions/grafo7331.41.sol'

