
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 00:33:57 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo195.15.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/grafo195.15.lp
Reading time = 0.25 seconds
: 152124 rows, 636 columns, 456824 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 152124 rows, 636 columns and 456824 nonzeros
Model fingerprint: 0x201fffbd
Variable types: 22 continuous, 614 integer (614 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 80271 rows and 2 columns
Presolve time: 1.07s
Presolved: 71853 rows, 634 columns, 216095 nonzeros
Variable types: 0 continuous, 634 integer (612 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 630 rows, 72483 columns, 216729 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         22    -infinity     -0.0000000e+00      1s
       1        696  -2.0475000e+08  -1.3650000e+01      1s
       2       1641  -1.2504867e+05  -1.4533541e+01      1s
       3       1992  -3.2000000e+01  -2.8976949e+01      1s

Sifting complete


Root relaxation: objective 3.200000e+01, 2260 iterations, 0.33 seconds (0.30 work units)

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

     0     0   32.00000    0  317    5.00000   32.00000   540%     -    3s
H    0     0                       6.0000000   32.00000   433%     -    5s
     0     0   32.00000    0  391    6.00000   32.00000   433%     -    8s
     0     0   32.00000    0  365    6.00000   32.00000   433%     -    9s
     0     0   32.00000    0  325    6.00000   32.00000   433%     -   17s
     0     0   32.00000    0  298    6.00000   32.00000   433%     -   18s
     0     0   32.00000    0  295    6.00000   32.00000   433%     -   25s
     0     0   32.00000    0  268    6.00000   32.00000   433%     -   26s
     0     0   32.00000    0  343    6.00000   32.00000   433%     -   35s
     0     0   32.00000    0  308    6.00000   32.00000   433%     -   36s
     0     0   32.00000    0  317    6.00000   32.00000   433%     -   43s
     0     0   32.00000    0  309    6.00000   32.00000   433%     -   44s
     0     0   32.00000    0  240    6.00000   32.00000   433%     -   50s

Cutting planes:
  Cover: 6
  Clique: 32
  MIR: 40
  StrongCG: 1
  Zero half: 54
  RLT: 53
  BQP: 1

Explored 1 nodes (27698 simplex iterations) in 50.09 seconds (50.17 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 3.200000000000e+01, gap 433.3333%

Wrote result file './lp_solutions/grafo195.15.sol'

