
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 07:47:20 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5514.39.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/grafo5514.39.lp
Reading time = 0.25 seconds
: 153865 rows, 1825 columns, 462929 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 153865 rows, 1825 columns and 462929 nonzeros
Model fingerprint: 0xed6779a8
Variable types: 39 continuous, 1786 integer (1786 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 2.0000000
Presolve removed 63259 rows and 16 columns
Presolve time: 1.11s
Presolved: 90606 rows, 1809 columns, 273330 nonzeros
Variable types: 0 continuous, 1809 integer (1770 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 1809 rows, 92415 columns, 275139 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        290    -infinity     -2.0000000e+00      2s
       1       2996  -2.7743048e+02  -2.0659009e+00      2s
       2       6391  -2.6793392e+02  -2.1749366e+00      2s
       3       9612  -2.6491163e+02  -2.3578886e+00      2s
       4      12477  -2.6487256e+02  -2.6333279e+00      2s
       5      15135  -2.6482762e+02  -2.6797268e+00      3s
       6      18085  -2.6482762e+02  -2.9097494e+00      3s
       7      19710  -6.5292547e+01  -2.9124817e+00      3s
       8      21210  -4.0020753e+01  -2.9229547e+00      3s
       9      22703  -4.0020753e+01  -2.9251516e+00      3s
      10      24282  -4.0020753e+01  -2.9273749e+00      3s
      11      25798  -4.0020753e+01  -2.9301925e+00      3s
      12      27437  -4.0020753e+01  -2.9655217e+00      3s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   39313    3.9977198e+01   0.000000e+00   9.335786e+03      5s
   70478    4.0000000e+01   0.000000e+00   0.000000e+00     10s
   70478    4.0000000e+01   0.000000e+00   0.000000e+00     10s

Root relaxation: objective 4.000000e+01, 70478 iterations, 8.65 seconds (6.44 work units)
Total elapsed time = 10.14s (DegenMoves)
Total elapsed time = 18.43s (DegenMoves)
Total elapsed time = 22.17s (DegenMoves)

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

     0     0   40.00000    0  496    8.00000   40.00000   400%     -   25s
H    0     0                      10.0000000   40.00000   300%     -   25s
     0     0   40.00000    0  657   10.00000   40.00000   300%     -   35s
     0     0   40.00000    0  655   10.00000   40.00000   300%     -   36s
     0     0   40.00000    0  592   10.00000   40.00000   300%     -   50s

Cutting planes:
  Gomory: 5
  Lift-and-project: 31
  Cover: 7
  Clique: 31
  MIR: 98
  Zero half: 59
  RLT: 80
  BQP: 1

Explored 1 nodes (95275 simplex iterations) in 50.04 seconds (54.97 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 10 8 2 

Time limit reached
Best objective 1.000000000000e+01, best bound 4.000000000000e+01, gap 300.0000%

Wrote result file './lp_solutions/grafo5514.39.sol'

