
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 01:57:24 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo2006.25.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/grafo2006.25.lp
Reading time = 0.28 seconds
: 165563 rows, 1108 columns, 497545 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 165563 rows, 1108 columns and 497545 nonzeros
Model fingerprint: 0x1562a354
Variable types: 31 continuous, 1077 integer (1077 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 82162 rows and 15 columns
Presolve time: 1.33s
Presolved: 83401 rows, 1093 columns, 251314 nonzeros
Variable types: 0 continuous, 1093 integer (1062 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 1093 rows, 84494 columns, 252407 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         31    -infinity     -0.0000000e+00      2s
       1       2232  -3.1154943e+02  -5.2804987e+00      2s
       2       3014  -3.0753793e+02  -7.6969638e+00      2s
       3       3810  -3.0439097e+02  -8.5493786e+00      2s
       4       4982  -3.0438285e+02  -9.4298801e+00      2s
       5       5428  -4.4500000e+01  -9.5207566e+00      2s
       6       6011  -3.5000000e+01  -9.5453503e+00      2s
       7       6543  -3.4000000e+01  -9.9087308e+00      2s
       8       7045  -3.4000000e+01  -1.0051376e+01      2s
       9       7553  -3.4000000e+01  -1.0289506e+01      2s
      10       8125  -3.4000000e+01  -1.0479794e+01      2s
      11       8657  -3.4000000e+01  -1.0709155e+01      2s

Sifting complete


Root relaxation: objective 3.400000e+01, 13820 iterations, 1.38 seconds (1.14 work units)
Total elapsed time = 9.81s (DegenMoves)
Total elapsed time = 10.22s (DegenMoves)

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

     0     0   34.00000    0  293    5.00000   34.00000   580%     -   12s
     0     0   34.00000    0  544    5.00000   34.00000   580%     -   18s
     0     0   34.00000    0  542    5.00000   34.00000   580%     -   19s
     0     0   34.00000    0  360    5.00000   34.00000   580%     -   30s
H    0     0                       6.0000000   34.00000   467%     -   31s
     0     0   34.00000    0  325    6.00000   34.00000   467%     -   31s
     0     0   34.00000    0  443    6.00000   34.00000   467%     -   50s

Cutting planes:
  Cover: 32
  Clique: 23
  MIR: 88
  StrongCG: 1
  GUB cover: 1
  Zero half: 58
  RLT: 56
  BQP: 2

Explored 1 nodes (41847 simplex iterations) in 50.02 seconds (63.97 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 6 5 -0 

Time limit reached
Best objective 6.000000000000e+00, best bound 3.400000000000e+01, gap 466.6667%

Wrote result file './lp_solutions/grafo2006.25.sol'

