
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 01:39:02 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3062.23.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/grafo3062.23.lp
Reading time = 0.61 seconds
: 377694 rows, 1313 columns, 1134237 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 377694 rows, 1313 columns and 1134237 nonzeros
Model fingerprint: 0x1cb34e67
Variable types: 35 continuous, 1278 integer (1278 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 -0.0000000
Presolve removed 191837 rows and 4 columns
Presolve time: 2.85s
Presolved: 185857 rows, 1309 columns, 558936 nonzeros
Variable types: 0 continuous, 1309 integer (1274 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 1307 rows, 187164 columns, 560245 nonzeros


Starting sifting (using dual simplex for sub-problems)...

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         35    -infinity     -0.0000000e+00      4s
       1       1475  -3.1875000e+08  -2.1250000e+01      4s
       2       2517  -5.4750031e+07  -2.4443751e+01      4s
       3       2932  -5.4750031e+07  -2.4842968e+01      4s
       4       3264  -5.4750031e+07  -2.4900000e+01      4s
       5       3676  -3.0750055e+07  -2.4932032e+01      4s
       6       4103  -3.0750055e+07  -2.4996096e+01      4s
       7       4488  -1.3750072e+07  -2.5521270e+01      4s
       8       4882  -1.0750075e+07  -2.6010248e+01      4s
       9       5268  -9.7500760e+06  -2.6020405e+01      4s
      10       5658  -7.5008500e+05  -2.6254538e+01      4s
      11       6011  -8.7000000e+01  -2.6327662e+01      4s
      12       6522  -4.7000000e+01  -2.6406859e+01      4s
      13       7102  -4.7000000e+01  -2.6417403e+01      4s
      14       7917  -4.7000000e+01  -3.3038622e+01      4s
      15       8754  -4.7000000e+01  -3.5768320e+01      4s

Sifting complete


Root relaxation: objective 4.700000e+01, 11500 iterations, 1.43 seconds (1.32 work units)

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

     0     0   47.00000    0  811    7.00000   47.00000   571%     -   20s
H    0     0                       8.0000000   47.00000   487%     -   20s
     0     0   47.00000    0  863    8.00000   47.00000   487%     -   48s

Cutting planes:
  Gomory: 1
  Clique: 115
  MIR: 20
  Zero half: 14
  RLT: 54
  BQP: 15

Explored 1 nodes (23602 simplex iterations) in 50.08 seconds (56.10 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 8 7 -0 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.700000000000e+01, gap 487.5000%

Wrote result file './lp_solutions/grafo3062.23.sol'

