
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 05:57:18 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5698.37.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/grafo5698.37.lp
Reading time = 0.29 seconds
: 179684 rows, 1776 columns, 540432 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 179684 rows, 1776 columns and 540432 nonzeros
Model fingerprint: 0x9528f7c1
Variable types: 39 continuous, 1737 integer (1737 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 78351 rows and 16 columns
Presolve time: 1.45s
Presolved: 101333 rows, 1760 columns, 305640 nonzeros
Variable types: 0 continuous, 1760 integer (1721 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 1760 rows, 103093 columns, 307400 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        435    -infinity     -3.0000736e+00      2s
       1       2640  -3.9454097e+02  -3.1308435e+00      2s
       2       4584  -3.6348349e+02  -3.2319514e+00      2s
       3       6254  -3.6248420e+02  -3.4047262e+00      2s
       4       7952  -3.6248420e+02  -3.5818882e+00      2s
       5       9429  -5.0028067e+01  -3.5931345e+00      2s
       6      10903  -3.8025844e+01  -3.5972361e+00      2s
       7      12506  -3.8025844e+01  -3.6018242e+00      2s
       8      14254  -3.8025844e+01  -3.6161934e+00      3s
       9      16046  -3.8025844e+01  -3.6463573e+00      3s
      10      17798  -3.8025844e+01  -3.6674179e+00      3s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   33396    3.7997756e+01   0.000000e+00   1.711576e+02      5s
   40355    3.8000000e+01   0.000000e+00   0.000000e+00      6s
   40355    3.8000000e+01   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 3.800000e+01, 40355 iterations, 4.80 seconds (3.88 work units)
Total elapsed time = 19.37s (DegenMoves)
Total elapsed time = 20.32s (DegenMoves)

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

     0     0   38.00000    0  462    7.00000   38.00000   443%     -   22s
H    0     0                       8.0000000   38.00000   375%     -   22s
     0     0   38.00000    0  744    8.00000   38.00000   375%     -   35s
     0     0   38.00000    0  697    8.00000   38.00000   375%     -   37s
     0     0   38.00000    0  614    8.00000   38.00000   375%     -   50s

Cutting planes:
  Gomory: 6
  Lift-and-project: 34
  Cover: 15
  Clique: 24
  MIR: 87
  StrongCG: 1
  Zero half: 19
  RLT: 50
  BQP: 1

Explored 1 nodes (62088 simplex iterations) in 50.04 seconds (52.50 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 7 

Time limit reached
Best objective 8.000000000000e+00, best bound 3.800000000000e+01, gap 375.0000%

Wrote result file './lp_solutions/grafo5698.37.sol'

