
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 01:20:24 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4004.41.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/grafo4004.41.lp
Reading time = 0.14 seconds
: 76296 rows, 2003 columns, 230417 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 76296 rows, 2003 columns and 230417 nonzeros
Model fingerprint: 0xf005c7ae
Variable types: 42 continuous, 1961 integer (1961 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 3.0000000
Presolve removed 17690 rows and 28 columns
Presolve time: 0.69s
Presolved: 58606 rows, 1975 columns, 177810 nonzeros
Variable types: 0 continuous, 1975 integer (1933 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 1975 rows, 60581 columns, 179785 nonzeros


Root relaxation: objective 3.300000e+01, 2028 iterations, 0.63 seconds (0.53 work units)
Total elapsed time = 7.78s (DegenMoves)

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

     0     0   33.00000    0  452    7.00000   33.00000   371%     -    8s
H    0     0                       8.0000000   33.00000   312%     -    8s
H    0     0                       9.0000000   33.00000   267%     -   10s
     0     0   33.00000    0  773    9.00000   33.00000   267%     -   23s
     0     0   33.00000    0  717    9.00000   33.00000   267%     -   23s
     0     0   33.00000    0  491    9.00000   33.00000   267%     -   50s

Cutting planes:
  Gomory: 7
  Lift-and-project: 23
  Cover: 6
  Clique: 12
  MIR: 86
  StrongCG: 1
  Zero half: 47
  RLT: 48

Explored 1 nodes (33194 simplex iterations) in 50.08 seconds (33.69 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 9 8 7 3 

Time limit reached
Best objective 9.000000000000e+00, best bound 3.300000000000e+01, gap 266.6667%

Wrote result file './lp_solutions/grafo4004.41.sol'

