
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 06:16:52 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4159.50.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/grafo4159.50.lp
Reading time = 0.33 seconds
: 171674 rows, 3515 columns, 518383 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 171674 rows, 3515 columns and 518383 nonzeros
Model fingerprint: 0xdb364c0e
Variable types: 61 continuous, 3454 integer (3454 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 33342 rows and 1 columns
Presolve time: 1.32s
Presolved: 138332 rows, 3514 columns, 418844 nonzeros
Variable types: 0 continuous, 3514 integer (3453 binary)
Found heuristic solution: objective 6.0000000
Root relaxation presolved: 3469 rows, 141801 columns, 422358 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   12033    5.6956005e+01   0.000000e+00   1.104757e+05      5s
   25556    5.0910305e+01   0.000000e+00   4.270069e+04     10s
   36996    5.0899118e+01   0.000000e+00   1.185518e+04     15s
   48436    5.0893818e+01   0.000000e+00   2.186524e+04     20s
   59356    5.0891854e+01   0.000000e+00   4.431024e+03     25s
   67171    5.1000000e+01   0.000000e+00   0.000000e+00     29s
   67171    5.1000000e+01   0.000000e+00   0.000000e+00     29s
   67171    5.1000000e+01   0.000000e+00   0.000000e+00     29s

Root relaxation: objective 5.100000e+01, 67171 iterations, 27.10 seconds (16.98 work units)

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

     0     0   51.00000    0 1820    6.00000   51.00000   750%     -   50s

Explored 1 nodes (74496 simplex iterations) in 50.06 seconds (35.71 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 6 

Time limit reached
Best objective 6.000000000000e+00, best bound 5.100000000000e+01, gap 750.0000%

Wrote result file './lp_solutions/grafo4159.50.sol'

