
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 05:29:47 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6697.42.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/grafo6697.42.lp
Reading time = 0.14 seconds
: 86241 rows, 2495 columns, 260941 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 86241 rows, 2495 columns and 260941 nonzeros
Model fingerprint: 0xef448ab6
Variable types: 51 continuous, 2444 integer (2444 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 4.0000000
Presolve removed 13136 rows and 1 columns
Presolve time: 0.48s
Presolved: 73105 rows, 2494 columns, 221869 nonzeros
Variable types: 0 continuous, 2494 integer (2443 binary)
Found heuristic solution: objective 9.0000000
Root relaxation presolved: 2470 rows, 75575 columns, 224363 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   21090    5.7950147e+01   0.000000e+00   3.613837e+04      5s
   42501    5.7934608e+01   0.000000e+00   1.638345e+04     10s
   64084    5.7927936e+01   0.000000e+00   5.826037e+03     15s
   85675    5.7925036e+01   0.000000e+00   7.362679e+02     20s
   92183    5.8000000e+01   0.000000e+00   0.000000e+00     22s
   92183    5.8000000e+01   0.000000e+00   0.000000e+00     22s
   92183    5.8000000e+01   0.000000e+00   0.000000e+00     22s

Root relaxation: objective 5.800000e+01, 92183 iterations, 21.08 seconds (18.23 work units)
Total elapsed time = 39.00s (DegenMoves)
Total elapsed time = 44.74s (DegenMoves)
Total elapsed time = 46.13s (DegenMoves)

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

     0     0   58.00000    0  715    9.00000   58.00000   544%     -   47s
H    0     0                      12.0000000   58.00000   383%     -   47s

Cutting planes:
  Cover: 35
  Clique: 2
  MIR: 338
  StrongCG: 2

Explored 1 nodes (114439 simplex iterations) in 50.05 seconds (50.78 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 12 9 4 

Time limit reached
Best objective 1.200000000000e+01, best bound 5.800000000000e+01, gap 383.3333%

Wrote result file './lp_solutions/grafo6697.42.sol'

