
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 02:03:27 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3548.42.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/grafo3548.42.lp
Reading time = 0.23 seconds
: 121972 rows, 2174 columns, 367612 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 121972 rows, 2174 columns and 367612 nonzeros
Model fingerprint: 0xc5932ee5
Variable types: 42 continuous, 2132 integer (2132 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 60798 rows and 98 columns
Presolve time: 0.78s
Presolved: 61174 rows, 2076 columns, 185684 nonzeros
Variable types: 0 continuous, 2076 integer (2034 binary)
Found heuristic solution: objective 12.0000000
Root relaxation presolved: 2067 rows, 63241 columns, 187760 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   20200    3.7931336e+01   0.000000e+00   1.657598e+04      5s
   40968    3.7921765e+01   0.000000e+00   7.753378e+00     10s
   42058    3.8000000e+01   0.000000e+00   0.000000e+00     10s
   42058    3.8000000e+01   0.000000e+00   0.000000e+00     10s
   42058    3.8000000e+01   0.000000e+00   0.000000e+00     10s

Root relaxation: objective 3.800000e+01, 42058 iterations, 9.35 seconds (6.74 work units)
Total elapsed time = 20.88s (DegenMoves)
Total elapsed time = 26.02s (DegenMoves)

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

     0     0   38.00000    0  551   12.00000   38.00000   217%     -   27s
H    0     0                      13.0000000   38.00000   192%     -   27s
H    0     0                      14.0000000   38.00000   171%     -   30s
     0     0   38.00000    0  837   14.00000   38.00000   171%     -   45s
     0     0   38.00000    0  801   14.00000   38.00000   171%     -   48s

Cutting planes:
  Cover: 14
  Clique: 11
  MIR: 93
  StrongCG: 5
  Zero half: 25
  RLT: 34
  BQP: 3

Explored 1 nodes (67982 simplex iterations) in 50.12 seconds (36.52 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 14 13 12 

Time limit reached
Best objective 1.400000000000e+01, best bound 3.800000000000e+01, gap 171.4286%

Wrote result file './lp_solutions/grafo3548.42.sol'

