
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 06:51:02 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5219.38.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/grafo5219.38.lp
Reading time = 0.24 seconds
: 149922 rows, 1815 columns, 451173 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 149922 rows, 1815 columns and 451173 nonzeros
Model fingerprint: 0xba8a3a9e
Variable types: 40 continuous, 1775 integer (1775 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 61062 rows and 15 columns
Presolve time: 1.13s
Presolved: 88860 rows, 1800 columns, 268183 nonzeros
Variable types: 0 continuous, 1800 integer (1760 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 1800 rows, 90660 columns, 269983 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        424    -infinity     -3.0000654e+00      2s
       1       2090  -3.0767220e+02  -3.0583866e+00      2s
       2       4141  -2.7018450e+02  -3.1405290e+00      2s
       3       6121  -2.6368902e+02  -3.2854065e+00      2s
       4       7894  -2.6336056e+02  -3.2942692e+00      2s
       5       9579  -2.6336056e+02  -3.3050093e+00      2s
       6      11234  -5.6876489e+01  -3.3072977e+00      2s
       7      12864  -3.7029418e+01  -3.3567316e+00      2s
       8      14436  -3.7029418e+01  -3.3825867e+00      2s
       9      15959  -3.7029418e+01  -3.3963908e+00      2s
      10      17512  -3.7029418e+01  -3.3985579e+00      2s
      11      19301  -3.7029418e+01  -3.4198638e+00      2s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   36422    3.6972345e+01   0.000000e+00   1.024774e+03      5s
   59765    3.7000000e+01   0.000000e+00   0.000000e+00      9s
   59765    3.7000000e+01   0.000000e+00   0.000000e+00      9s

Root relaxation: objective 3.700000e+01, 59765 iterations, 7.56 seconds (5.45 work units)
Total elapsed time = 19.54s (DegenMoves)
Total elapsed time = 26.55s (DegenMoves)

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

     0     0   37.00000    0  330    5.00000   37.00000   640%     -   28s
     0     0   37.00000    0  561    5.00000   37.00000   640%     -   34s
H    0     0                       7.0000000   37.00000   429%     -   34s
H    0     0                      10.0000000   37.00000   270%     -   34s
     0     0   37.00000    0  556   10.00000   37.00000   270%     -   35s
     0     0   37.00000    0  443   10.00000   37.00000   270%     -   50s

Cutting planes:
  Gomory: 2
  Lift-and-project: 36
  Cover: 11
  Clique: 28
  MIR: 102
  Zero half: 37
  RLT: 49
  BQP: 6

Explored 1 nodes (88038 simplex iterations) in 50.03 seconds (58.96 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 10 7 5 

Time limit reached
Best objective 1.000000000000e+01, best bound 3.700000000000e+01, gap 270.0000%

Wrote result file './lp_solutions/grafo5219.38.sol'

