
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 01:31:22 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6258.41.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/grafo6258.41.lp
Reading time = 0.35 seconds
: 171997 rows, 2838 columns, 518805 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 171997 rows, 2838 columns and 518805 nonzeros
Model fingerprint: 0xfc6b4394
Variable types: 55 continuous, 2783 integer (2783 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, 6e+01]
Presolve removed 54005 rows and 12 columns
Presolve time: 1.47s
Presolved: 117992 rows, 2826 columns, 357321 nonzeros
Variable types: 0 continuous, 2826 integer (2771 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 2812 rows, 120804 columns, 360147 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   13439    9.1090067e+01   0.000000e+00   1.131331e+06      5s
   28185    5.7804269e+01   0.000000e+00   1.690295e+05     10s
   43077    5.5721481e+01   0.000000e+00   2.382016e+05     15s
   57737    5.5673756e+01   0.000000e+00   4.753095e+04     20s
   72857    5.5656712e+01   0.000000e+00   1.496761e+04     25s
   87473    5.5649593e+01   0.000000e+00   4.558271e+03     30s
  101193    5.6000000e+01   0.000000e+00   0.000000e+00     35s
  101193    5.6000000e+01   0.000000e+00   0.000000e+00     35s
  101193    5.6000000e+01   0.000000e+00   0.000000e+00     35s

Root relaxation: objective 5.600000e+01, 101193 iterations, 33.22 seconds (19.33 work units)

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

     0     0   56.00000    0 1582    7.00000   56.00000   700%     -   50s

Explored 1 nodes (108184 simplex iterations) in 50.05 seconds (33.20 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 7 

Time limit reached
Best objective 7.000000000000e+00, best bound 5.600000000000e+01, gap 700.0000%

Wrote result file './lp_solutions/grafo6258.41.sol'

