
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 18 18:22:41 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1637.31.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/grafo1637.31.lp
Reading time = 0.14 seconds
: 82642 rows, 1407 columns, 249062 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 82642 rows, 1407 columns and 249062 nonzeros
Model fingerprint: 0xa937337c
Variable types: 37 continuous, 1370 integer (1370 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]
Presolve removed 31870 rows and 31 columns
Presolve time: 0.64s
Presolved: 50772 rows, 1376 columns, 153766 nonzeros
Variable types: 0 continuous, 1376 integer (1339 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 1376 rows, 52148 columns, 155142 nonzeros


Root relaxation: objective 3.100000e+01, 1905 iterations, 0.58 seconds (0.64 work units)
Total elapsed time = 5.36s (DegenMoves)

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

     0     0   31.00000    0  291    5.00000   31.00000   520%     -    6s
H    0     0                       6.0000000   31.00000   417%     -    6s
     0     0   31.00000    0  536    6.00000   31.00000   417%     -   11s
     0     0   31.00000    0  520    6.00000   31.00000   417%     -   12s
H    0     0                       7.0000000   31.00000   343%     -   32s
     0     0   31.00000    0  405    7.00000   31.00000   343%     -   33s
     0     0   31.00000    0  364    7.00000   31.00000   343%     -   33s
     0     0   31.00000    0  466    7.00000   31.00000   343%     -   42s
     0     0   31.00000    0  425    7.00000   31.00000   343%     -   43s
     0     0   31.00000    0  490    7.00000   31.00000   343%     -   50s

Cutting planes:
  Lift-and-project: 1
  Cover: 15
  Clique: 13
  MIR: 100
  StrongCG: 1
  GUB cover: 3
  Zero half: 33
  RLT: 51

Explored 1 nodes (41561 simplex iterations) in 50.06 seconds (43.22 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 7 6 5 

Time limit reached
Best objective 7.000000000000e+00, best bound 3.100000000000e+01, gap 342.8571%

Wrote result file './lp_solutions/grafo1637.31.sol'

