
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 07:16:15 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6408.47.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/grafo6408.47.lp
Reading time = 0.13 seconds
: 85422 rows, 2467 columns, 258103 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 85422 rows, 2467 columns and 258103 nonzeros
Model fingerprint: 0x1ffd44fd
Variable types: 47 continuous, 2420 integer (2420 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 12131 rows and 0 columns
Presolve time: 0.48s
Presolved: 73291 rows, 2467 columns, 222136 nonzeros
Variable types: 0 continuous, 2467 integer (2420 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 2425 rows, 75716 columns, 224603 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   25036    4.0813448e+01   0.000000e+00   5.011110e+03      5s
   32104    4.1000000e+01   0.000000e+00   0.000000e+00      7s
   32104    4.1000000e+01   0.000000e+00   0.000000e+00      7s
   32104    4.1000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 4.100000e+01, 32104 iterations, 5.97 seconds (4.87 work units)
Total elapsed time = 16.69s (DegenMoves)
Total elapsed time = 20.43s (DegenMoves)

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

     0     0   41.00000    0  565    7.00000   41.00000   486%     -   20s
H    0     0                       8.0000000   41.00000   413%     -   23s
     0     0   41.00000    0  928    8.00000   41.00000   412%     -   33s
     0     0   41.00000    0  911    8.00000   41.00000   412%     -   35s
     0     0   41.00000    0  960    8.00000   41.00000   412%     -   50s

Cutting planes:
  Gomory: 7
  Lift-and-project: 19
  Cover: 6
  Clique: 1
  MIR: 119
  Zero half: 20
  RLT: 76

Explored 1 nodes (62451 simplex iterations) in 50.09 seconds (44.36 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 8 7 2 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.100000000000e+01, gap 412.5000%

Wrote result file './lp_solutions/grafo6408.47.sol'

