
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 07:33:52 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo2055.39.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/grafo2055.39.lp
Reading time = 0.14 seconds
: 88165 rows, 2201 columns, 266462 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 88165 rows, 2201 columns and 266462 nonzeros
Model fingerprint: 0x6a35ed75
Variable types: 47 continuous, 2154 integer (2154 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 20618 rows and 27 columns
Presolve time: 0.62s
Presolved: 67547 rows, 2174 columns, 205002 nonzeros
Variable types: 0 continuous, 2174 integer (2127 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2174 rows, 69721 columns, 207176 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   24795    4.0969065e+01   0.000000e+00   4.528911e+04      5s
   50720    4.0955121e+01   0.000000e+00   1.592226e+03     10s
   63224    4.1000000e+01   0.000000e+00   0.000000e+00     13s
   63224    4.1000000e+01   0.000000e+00   0.000000e+00     13s

Root relaxation: objective 4.100000e+01, 63224 iterations, 11.93 seconds (9.11 work units)
Total elapsed time = 22.37s (DegenMoves)
Total elapsed time = 25.90s (DegenMoves)

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

     0     0   41.00000    0  429    8.00000   41.00000   412%     -   27s
     0     0   41.00000    0  635    8.00000   41.00000   412%     -   37s
     0     0   41.00000    0  627    8.00000   41.00000   412%     -   39s
     0     0          -    0         8.00000   41.00000   412%     -   50s

Cutting planes:
  Gomory: 5
  Lift-and-project: 47
  Cover: 14
  Clique: 17
  MIR: 114
  StrongCG: 1
  Zero half: 18
  RLT: 60
  BQP: 3

Explored 1 nodes (89357 simplex iterations) in 50.08 seconds (42.59 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 8 

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

Wrote result file './lp_solutions/grafo2055.39.sol'

