
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 05:11:57 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5385.36.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/grafo5385.36.lp
Reading time = 0.32 seconds
: 193339 rows, 1943 columns, 581706 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 193339 rows, 1943 columns and 581706 nonzeros
Model fingerprint: 0xdd12bb87
Variable types: 43 continuous, 1900 integer (1900 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 82568 rows and 20 columns
Presolve time: 1.67s
Presolved: 110771 rows, 1923 columns, 334336 nonzeros
Variable types: 0 continuous, 1923 integer (1880 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 1923 rows, 112694 columns, 336259 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        476    -infinity     -3.0000756e+00      2s
       1       1778  -4.2489855e+02  -3.0493144e+00      2s
       2       3636  -4.0489788e+02  -3.1349318e+00      2s
       3       5266  -3.8190294e+02  -3.2212586e+00      2s
       4       6694  -3.8090396e+02  -3.3898359e+00      3s
       5       7735  -3.8060516e+02  -3.5637223e+00      3s
       6       8711  -3.8060516e+02  -3.7426294e+00      3s
       7       9799  -7.4547593e+01  -3.7457804e+00      3s
       8      11323  -4.5529384e+01  -3.7939821e+00      3s
       9      13144  -4.3030841e+01  -3.8489062e+00      3s
      10      14956  -4.3030841e+01  -3.8554737e+00      3s
      11      16946  -4.3030841e+01  -3.8932771e+00      3s
      12      19279  -4.3030841e+01  -3.8964136e+00      3s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   31977    4.2998597e+01   0.000000e+00   1.088452e+02      5s
   42239    4.3000000e+01   0.000000e+00   0.000000e+00      7s
   42239    4.3000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 4.300000e+01, 42239 iterations, 5.26 seconds (4.68 work units)
Total elapsed time = 22.89s (DegenMoves)
Total elapsed time = 26.01s (DegenMoves)

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

     0     0   43.00000    0  471    8.00000   43.00000   437%     -   26s
     0     0   43.00000    0  697    8.00000   43.00000   437%     -   36s
     0     0   43.00000    0  697    8.00000   43.00000   437%     -   38s
     0     0          -    0         8.00000   43.00000   437%     -   50s

Cutting planes:
  Gomory: 4
  Lift-and-project: 32
  Cover: 1
  Clique: 17
  MIR: 96
  StrongCG: 1
  Zero half: 54
  RLT: 40
  BQP: 3

Explored 1 nodes (64123 simplex iterations) in 50.04 seconds (51.55 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 8 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.300000000000e+01, gap 437.5000%

Wrote result file './lp_solutions/grafo5385.36.sol'

