
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 03:54:46 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1540.34.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/grafo1540.34.lp
Reading time = 0.24 seconds
: 145419 rows, 1519 columns, 437405 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 145419 rows, 1519 columns and 437405 nonzeros
Model fingerprint: 0x6efb3ab3
Variable types: 36 continuous, 1483 integer (1483 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 3.0000000
Presolve removed 64121 rows and 19 columns
Presolve time: 1.11s
Presolved: 81298 rows, 1500 columns, 245217 nonzeros
Variable types: 0 continuous, 1500 integer (1464 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 1500 rows, 82798 columns, 246717 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        395    -infinity     -3.0000667e+00      1s
       1       2061  -3.2686942e+02  -3.0789260e+00      2s
       2       4766  -3.1623023e+02  -3.2139865e+00      2s
       3       6731  -3.1519762e+02  -3.3489300e+00      2s
       4       8532  -3.1420221e+02  -3.5458557e+00      2s
       5      10232  -3.1420221e+02  -3.7473663e+00      2s
       6      11679  -6.9377727e+01  -3.7761922e+00      2s
       7      13001  -4.3363197e+01  -3.7889285e+00      2s
       8      14295  -3.8032806e+01  -3.8074831e+00      2s
       9      15675  -3.8032806e+01  -3.8088010e+00      2s
      10      17038  -3.8032806e+01  -3.8371782e+00      2s
      11      18398  -3.8032806e+01  -3.8760073e+00      2s
      12      19701  -3.8032806e+01  -3.9025594e+00      2s

Sifting complete


Root relaxation: objective 3.800000e+01, 38184 iterations, 3.47 seconds (2.63 work units)
Total elapsed time = 11.85s (DegenMoves)

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

     0     0   38.00000    0  376    8.00000   38.00000   375%     -   13s
     0     0   38.00000    0  487    8.00000   38.00000   375%     -   19s
     0     0   38.00000    0  490    8.00000   38.00000   375%     -   20s
     0     0   38.00000    0  345    8.00000   38.00000   375%     -   35s
H    0     0                      10.0000000   38.00000   280%     -   35s
     0     0   38.00000    0  393   10.00000   38.00000   280%     -   37s
     0     0   38.00000    0  405   10.00000   38.00000   280%     -   47s
H    0     0                      14.0000000   38.00000   171%     -   48s
     0     0          -    0        14.00000   38.00000   171%     -   50s

Cutting planes:
  Gomory: 1
  Lift-and-project: 4
  Cover: 3
  Clique: 35
  MIR: 49
  StrongCG: 5
  Zero half: 5
  RLT: 36
  BQP: 4

Explored 1 nodes (68104 simplex iterations) in 50.02 seconds (57.29 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 14 10 8 3 

Time limit reached
Best objective 1.400000000000e+01, best bound 3.800000000000e+01, gap 171.4286%

Wrote result file './lp_solutions/grafo1540.34.sol'

