
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 00:24:46 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo2529.40.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/grafo2529.40.lp
Reading time = 0.43 seconds
: 167150 rows, 1807 columns, 502722 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 167150 rows, 1807 columns and 502722 nonzeros
Model fingerprint: 0x1c07f74d
Variable types: 38 continuous, 1769 integer (1769 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 70109 rows and 18 columns
Presolve time: 1.97s
Presolved: 97041 rows, 1789 columns, 292540 nonzeros
Variable types: 0 continuous, 1789 integer (1751 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 1789 rows, 98830 columns, 294329 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        304    -infinity     -2.0000000e+00      3s
       1       3121  -2.5337999e+02  -2.0269953e+00      3s
       2       6273  -2.5012890e+02  -2.0800834e+00      3s
       3       9421  -2.4326111e+02  -2.1988852e+00      4s
       4      12096  -2.4080946e+02  -2.2191035e+00      4s
       5      14679  -2.4075023e+02  -2.2534945e+00      4s
       6      17008  -2.4040776e+02  -2.4150926e+00      4s
       7      19277  -2.4026912e+02  -2.5173475e+00      5s
       8      21620  -2.4026912e+02  -2.9601242e+00      5s
       9      23985  -6.1911237e+01  -2.9670801e+00      5s
      10      25597  -3.7557066e+01  -2.9750954e+00      5s
      11      27281  -3.6015057e+01  -2.9768514e+00      5s
      12      28925  -3.6015057e+01  -2.9791423e+00      5s
      13      30752  -3.6015057e+01  -2.9832378e+00      6s
      14      32601  -3.6015057e+01  -2.9984167e+00      6s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   35056    3.6000000e+01   0.000000e+00   4.495238e+03      6s
   52125    3.5985997e+01   0.000000e+00   1.161756e+02     10s
   70090    3.5985570e+01   0.000000e+00   1.435207e+00     15s
   75267    3.6000000e+01   0.000000e+00   0.000000e+00     16s
   75267    3.6000000e+01   0.000000e+00   0.000000e+00     17s

Root relaxation: objective 3.600000e+01, 75267 iterations, 14.35 seconds (7.17 work units)
Total elapsed time = 26.32s (DegenMoves)

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

     0     0   36.00000    0  374    8.00000   36.00000   350%     -   29s
     0     0   36.00000    0  645    8.00000   36.00000   350%     -   40s
     0     0   36.00000    0  564    8.00000   36.00000   350%     -   43s

Cutting planes:
  Lift-and-project: 31
  Cover: 17
  Clique: 58
  MIR: 90
  GUB cover: 1
  Zero half: 56
  RLT: 19
  BQP: 7

Explored 1 nodes (87560 simplex iterations) in 50.15 seconds (32.22 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 2 

Time limit reached
Best objective 8.000000000000e+00, best bound 3.600000000000e+01, gap 350.0000%

Wrote result file './lp_solutions/grafo2529.40.sol'

