
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 02:39:56 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1615.28.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/grafo1615.28.lp
Reading time = 0.13 seconds
: 78615 rows, 1130 columns, 236712 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 78615 rows, 1130 columns and 236712 nonzeros
Model fingerprint: 0xf1196a43
Variable types: 31 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 2.0000000
Presolve removed 34232 rows and 12 columns
Presolve time: 0.58s
Presolved: 44383 rows, 1118 columns, 134227 nonzeros
Variable types: 0 continuous, 1118 integer (1087 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 1118 rows, 45501 columns, 135345 nonzeros


Root relaxation: objective 3.000000e+01, 1140 iterations, 0.28 seconds (0.31 work units)

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

     0     0   30.00000    0  264    7.00000   30.00000   329%     -    2s
H    0     0                       8.0000000   30.00000   275%     -    2s
     0     0   30.00000    0  437    8.00000   30.00000   275%     -    4s
     0     0   30.00000    0  429    8.00000   30.00000   275%     -    5s
     0     0   30.00000    0  283    8.00000   30.00000   275%     -   11s
H    0     0                       9.0000000   30.00000   233%     -   11s
     0     0   30.00000    0  274    9.00000   30.00000   233%     -   11s
     0     0   30.00000    0  338    9.00000   30.00000   233%     -   18s
     0     0   30.00000    0  292    9.00000   30.00000   233%     -   18s
     0     0   30.00000    0  351    9.00000   30.00000   233%     -   24s
     0     0   30.00000    0  360    9.00000   30.00000   233%     -   24s
     0     0   30.00000    0  356    9.00000   30.00000   233%     -   27s
     0     0   30.00000    0  350    9.00000   30.00000   233%     -   28s
     0     0   30.00000    0  371    9.00000   30.00000   233%     -   32s
     0     0   30.00000    0  371    9.00000   30.00000   233%     -   35s
     0     2   30.00000    0  371    9.00000   30.00000   233%     -   44s
     1     4   30.00000    1  359    9.00000   30.00000   233%  3820   45s
    23    27   30.00000    6  464    9.00000   30.00000   233%   627   50s

Cutting planes:
  Gomory: 2
  Cover: 6
  Clique: 20
  MIR: 77
  StrongCG: 3
  GUB cover: 1
  Zero half: 15
  RLT: 72

Explored 26 nodes (50752 simplex iterations) in 50.04 seconds (61.99 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 9 8 7 2 

Time limit reached
Best objective 9.000000000000e+00, best bound 3.000000000000e+01, gap 233.3333%

Wrote result file './lp_solutions/grafo1615.28.sol'

