
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 01:07:10 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo993.18.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/grafo993.18.lp
Reading time = 0.25 seconds
: 154039 rows, 632 columns, 462574 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 154039 rows, 632 columns and 462574 nonzeros
Model fingerprint: 0xcabdc535
Variable types: 21 continuous, 611 integer (611 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 79868 rows and 1 columns
Presolve time: 0.95s
Presolved: 74171 rows, 631 columns, 222999 nonzeros
Variable types: 0 continuous, 631 integer (610 binary)
Found heuristic solution: objective 4.0000000
Root relaxation presolved: 631 rows, 74802 columns, 223630 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        314    -infinity     -3.0000375e+00      1s
       1       1815  -1.6682138e+02  -1.2309182e+01      1s
       2       2666  -3.8003398e+01  -1.7533553e+01      1s
       3       3252  -2.7002423e+01  -2.2299922e+01      2s
       4       3782  -2.6002137e+01  -2.5327680e+01      2s

Sifting complete


Root relaxation: objective 2.600000e+01, 4287 iterations, 0.46 seconds (0.41 work units)

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

     0     0   26.00000    0  207    4.00000   26.00000   550%     -    4s
H    0     0                       7.0000000   26.00000   271%     -    5s
H    0     0                       8.0000000   26.00000   225%     -    5s
     0     0   26.00000    0  301    8.00000   26.00000   225%     -    7s
     0     0   26.00000    0  289    8.00000   26.00000   225%     -    9s
H    0     0                       9.0000000   26.00000   189%     -   16s
     0     0   26.00000    0  197    9.00000   26.00000   189%     -   16s
     0     0   26.00000    0  191    9.00000   26.00000   189%     -   16s
     0     0   26.00000    0  215    9.00000   26.00000   189%     -   21s
     0     0   26.00000    0  193    9.00000   26.00000   189%     -   22s
H    0     0                      12.0000000   26.00000   117%     -   29s
     0     0   26.00000    0  223   12.00000   26.00000   117%     -   29s
     0     0   26.00000    0  185   12.00000   26.00000   117%     -   29s
     0     0   26.00000    0  233   12.00000   26.00000   117%     -   34s
     0     0   26.00000    0  231   12.00000   26.00000   117%     -   35s
     0     0   26.00000    0  225   12.00000   26.00000   117%     -   40s
     0     0   26.00000    0  219   12.00000   26.00000   117%     -   43s
     0     2   26.00000    0  219   12.00000   26.00000   117%     -   50s

Cutting planes:
  Cover: 6
  Clique: 19
  MIR: 20
  StrongCG: 1
  Zero half: 9
  RLT: 19
  BQP: 2

Explored 1 nodes (26283 simplex iterations) in 50.06 seconds (49.56 work units)
Thread count was 8 (of 8 available processors)

Solution count 5: 12 9 8 ... 4

Time limit reached
Best objective 1.200000000000e+01, best bound 2.600000000000e+01, gap 116.6667%

Wrote result file './lp_solutions/grafo993.18.sol'

