
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 01:49:56 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7686.41.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/grafo7686.41.lp
Reading time = 0.33 seconds
: 177540 rows, 2619 columns, 535068 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 177540 rows, 2619 columns and 535068 nonzeros
Model fingerprint: 0x542fe5bf
Variable types: 52 continuous, 2567 integer (2567 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 2.0000000
Presolve removed 61042 rows and 24 columns
Presolve time: 1.74s
Presolved: 116498 rows, 2595 columns, 352375 nonzeros
Variable types: 0 continuous, 2595 integer (2543 binary)
Found heuristic solution: objective 10.0000000
Root relaxation presolved: 2589 rows, 119087 columns, 354970 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   12468    6.7417019e+01   0.000000e+00   1.298052e+06      5s
   28874    5.3658670e+01   0.000000e+00   2.482650e+05     10s
   45699    5.3605724e+01   0.000000e+00   1.693747e+04     15s
   61975    5.3591067e+01   0.000000e+00   9.558622e+03     20s
   78250    5.3586560e+01   0.000000e+00   3.573607e+03     25s
   91656    5.4000000e+01   0.000000e+00   0.000000e+00     29s
   91656    5.4000000e+01   0.000000e+00   0.000000e+00     29s
   91656    5.4000000e+01   0.000000e+00   0.000000e+00     29s

Root relaxation: objective 5.400000e+01, 91656 iterations, 27.52 seconds (17.27 work units)

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

     0     0   54.00000    0 1494   10.00000   54.00000   440%     -   50s

Explored 1 nodes (100684 simplex iterations) in 50.05 seconds (36.25 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 10 2 

Time limit reached
Best objective 1.000000000000e+01, best bound 5.400000000000e+01, gap 440.0000%

Wrote result file './lp_solutions/grafo7686.41.sol'

