
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 04:12:40 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1836.45.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/grafo1836.45.lp
Reading time = 0.53 seconds
: 257057 rows, 2982 columns, 773957 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 257057 rows, 2982 columns and 773957 nonzeros
Model fingerprint: 0x2bbc6f68
Variable types: 55 continuous, 2927 integer (2927 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]
Found heuristic solution: objective 2.0000000
Presolve removed 95504 rows and 18 columns
Presolve time: 2.31s
Presolved: 161553 rows, 2964 columns, 487915 nonzeros
Variable types: 0 continuous, 2964 integer (2909 binary)
Found heuristic solution: objective 13.0000000
Root relaxation presolved: 2958 rows, 164511 columns, 490879 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   10295    9.7677343e+01   0.000000e+00   4.273775e+05      5s
   24413    5.9756958e+01   0.000000e+00   1.281294e+05     10s
   37832    5.6676575e+01   0.000000e+00   3.566742e+05     15s
   51158    5.5635265e+01   0.000000e+00   1.146366e+05     20s
   65144    5.5615754e+01   0.000000e+00   2.146210e+04     25s
   79130    5.5607705e+01   0.000000e+00   1.197783e+04     30s
   92450    5.5604078e+01   0.000000e+00   1.083602e+03     35s
  105073    5.6000000e+01   0.000000e+00   0.000000e+00     40s
  105073    5.6000000e+01   0.000000e+00   0.000000e+00     40s
  105073    5.6000000e+01   0.000000e+00   0.000000e+00     40s

Root relaxation: objective 5.600000e+01, 105073 iterations, 37.64 seconds (21.92 work units)

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

     0     0   56.00000    0 1639   13.00000   56.00000   331%     -   50s

Explored 1 nodes (108214 simplex iterations) in 50.06 seconds (33.06 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 13 2 

Time limit reached
Best objective 1.300000000000e+01, best bound 5.600000000000e+01, gap 330.7692%

Wrote result file './lp_solutions/grafo1836.45.sol'

