
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 05:35:31 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3998.48.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/grafo3998.48.lp
Reading time = 0.25 seconds
: 131125 rows, 2581 columns, 395329 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 131125 rows, 2581 columns and 395329 nonzeros
Model fingerprint: 0x166e1830
Variable types: 46 continuous, 2535 integer (2535 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 36527 rows and 15 columns
Presolve time: 1.07s
Presolved: 94598 rows, 2566 columns, 286141 nonzeros
Variable types: 0 continuous, 2566 integer (2520 binary)
Root relaxation presolved: 2561 rows, 97159 columns, 288707 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   14576    4.7788117e+01   0.000000e+00   1.078699e+05      5s
   32636    4.7729412e+01   0.000000e+00   2.045295e+04     10s
   49856    4.7719631e+01   0.000000e+00   8.519853e+02     15s
   67075    4.8000000e+01   0.000000e+00   0.000000e+00     20s
   67075    4.8000000e+01   0.000000e+00   0.000000e+00     20s
   67075    4.8000000e+01   0.000000e+00   0.000000e+00     20s

Root relaxation: objective 4.800000e+01, 67075 iterations, 18.73 seconds (11.48 work units)
Total elapsed time = 35.76s (DegenMoves)
Total elapsed time = 45.42s (DegenMoves)

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

     0     0   48.00000    0  437          -   48.00000      -     -   47s
H    0     0                       8.0000000   48.00000   500%     -   50s

Cutting planes:
  Cover: 39
  Clique: 24
  MIR: 156
  StrongCG: 3
  GUB cover: 2

Explored 1 nodes (86788 simplex iterations) in 50.05 seconds (44.74 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 8 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.800000000000e+01, gap 500.0000%

Wrote result file './lp_solutions/grafo3998.48.sol'

