
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 07:51:59 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3972.43.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/grafo3972.43.lp
Reading time = 0.34 seconds
: 213464 rows, 2681 columns, 642793 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 213464 rows, 2681 columns and 642793 nonzeros
Model fingerprint: 0xd24594cb
Variable types: 51 continuous, 2630 integer (2630 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 80720 rows and 12 columns
Presolve time: 1.34s
Presolved: 132744 rows, 2669 columns, 400988 nonzeros
Variable types: 0 continuous, 2669 integer (2618 binary)
Root relaxation presolved: 2655 rows, 135399 columns, 403657 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   17916    6.3970971e+01   0.000000e+00   1.171308e+05      5s
   38357    5.6800854e+01   0.000000e+00   6.000243e+05     10s
   59796    5.6750343e+01   0.000000e+00   1.711667e+04     15s
   81811    5.6737889e+01   0.000000e+00   2.919200e+03     20s
   96176    5.7000000e+01   0.000000e+00   0.000000e+00     23s
   96176    5.7000000e+01   0.000000e+00   0.000000e+00     23s
   96176    5.7000000e+01   0.000000e+00   0.000000e+00     23s

Root relaxation: objective 5.700000e+01, 96176 iterations, 21.73 seconds (16.71 work units)
Total elapsed time = 43.55s (DegenMoves)
Total elapsed time = 45.65s (DegenMoves)

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

     0     0   57.00000    0  659          -   57.00000      -     -   47s
H    0     0                       8.0000000   57.00000   612%     -   47s
H    0     0                       9.0000000   57.00000   533%     -   48s

Cutting planes:
  Cover: 69
  Clique: 51
  MIR: 136
  GUB cover: 1

Explored 1 nodes (112005 simplex iterations) in 50.06 seconds (48.40 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 9 8 

Time limit reached
Best objective 9.000000000000e+00, best bound 5.700000000000e+01, gap 533.3333%

Wrote result file './lp_solutions/grafo3972.43.sol'

