
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 04:04:14 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6860.44.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/grafo6860.44.lp
Reading time = 0.43 seconds
: 191557 rows, 2844 columns, 577259 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 191557 rows, 2844 columns and 577259 nonzeros
Model fingerprint: 0x05ae0cda
Variable types: 53 continuous, 2791 integer (2791 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 65520 rows and 25 columns
Presolve time: 1.61s
Presolved: 126037 rows, 2819 columns, 381121 nonzeros
Variable types: 0 continuous, 2819 integer (2766 binary)
Root relaxation presolved: 2819 rows, 128856 columns, 383940 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   13093    7.5788144e+01   0.000000e+00   4.938552e+05      5s
   28770    6.0709079e+01   0.000000e+00   4.453301e+04     10s
   43890    6.0687479e+01   0.000000e+00   1.395725e+05     15s
   57390    6.0681960e+01   0.000000e+00   9.911399e+02     20s
   66158    6.1000000e+01   0.000000e+00   0.000000e+00     23s
   66158    6.1000000e+01   0.000000e+00   0.000000e+00     23s

Root relaxation: objective 6.100000e+01, 66158 iterations, 21.33 seconds (12.83 work units)

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

     0     0   61.00000    0 1544          -   61.00000      -     -   50s
H    0     0                       4.0000000   61.00000  1425%     -   50s

Explored 1 nodes (76146 simplex iterations) in 50.08 seconds (35.81 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 4 

Time limit reached
Best objective 4.000000000000e+00, best bound 6.100000000000e+01, gap 1425.0000%

Wrote result file './lp_solutions/grafo6860.44.sol'

