
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 00:39:14 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo467.15.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/grafo467.15.lp
Reading time = 0.22 seconds
: 134292 rows, 667 columns, 403382 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 134292 rows, 667 columns and 403382 nonzeros
Model fingerprint: 0xee93b8a3
Variable types: 24 continuous, 643 integer (643 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 69972 rows and 0 columns
Presolve time: 0.84s
Presolved: 64320 rows, 667 columns, 193551 nonzeros
Variable types: 0 continuous, 667 integer (643 binary)
Found heuristic solution: objective 6.0000000
Root relaxation presolved: 667 rows, 64987 columns, 194218 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         24    -infinity     -0.0000000e+00      1s
       1       1344  -2.2153563e+02  -1.0784033e+01      1s
       2       2119  -4.7371212e+01  -1.2425096e+01      1s
       3       2521  -3.7000000e+01  -2.1620168e+01      1s
       4       2874  -3.2000000e+01  -2.3384139e+01      1s
       5       3202  -3.2000000e+01  -2.7868713e+01      1s
       6       3557  -3.2000000e+01  -3.0247040e+01      1s
       7       3879  -3.2000000e+01  -3.0947733e+01      1s
       8       4190  -3.2000000e+01  -3.1593917e+01      1s

Sifting complete


Root relaxation: objective 3.200000e+01, 4498 iterations, 0.46 seconds (0.40 work units)

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

     0     0   32.00000    0  337    6.00000   32.00000   433%     -    5s
     0     0   32.00000    0  416    6.00000   32.00000   433%     -   10s
H    0     0                       7.0000000   32.00000   357%     -   10s
     0     0   32.00000    0  414    7.00000   32.00000   357%     -   11s
     0     0   32.00000    0  334    7.00000   32.00000   357%     -   17s
     0     0   32.00000    0  313    7.00000   32.00000   357%     -   18s
     0     0   32.00000    0  235    7.00000   32.00000   357%     -   29s
     0     0   32.00000    0  198    7.00000   32.00000   357%     -   30s
     0     0   32.00000    0  340    7.00000   32.00000   357%     -   36s
     0     0   32.00000    0  308    7.00000   32.00000   357%     -   37s
     0     0   32.00000    0  326    7.00000   32.00000   357%     -   42s
     0     0   32.00000    0  314    7.00000   32.00000   357%     -   43s
     0     0   32.00000    0  318    7.00000   32.00000   357%     -   47s
     0     0   32.00000    0  319    7.00000   32.00000   357%     -   48s
     0     0   32.00000    0  321    7.00000   32.00000   357%     -   50s

Cutting planes:
  Cover: 2
  Clique: 32
  MIR: 55
  Zero half: 65
  RLT: 50
  BQP: 2

Explored 1 nodes (34503 simplex iterations) in 50.06 seconds (51.38 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 7 6 -0 

Time limit reached
Best objective 7.000000000000e+00, best bound 3.200000000000e+01, gap 357.1429%

Wrote result file './lp_solutions/grafo467.15.sol'

