
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 03:21:54 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo11292.33.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/grafo11292.33.lp
Reading time = 0.26 seconds
: 162755 rows, 1821 columns, 489900 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 162755 rows, 1821 columns and 489900 nonzeros
Model fingerprint: 0xa9189f59
Variable types: 42 continuous, 1779 integer (1779 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 74468 rows and 25 columns
Presolve time: 1.23s
Presolved: 88287 rows, 1796 columns, 266911 nonzeros
Variable types: 0 continuous, 1796 integer (1754 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 1796 rows, 90083 columns, 268707 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        351    -infinity     -3.0000710e+00      2s
       1       1360  -3.4698512e+02  -3.0836866e+00      2s
       2       2723  -3.0351447e+02  -3.1593527e+00      2s
       3       4001  -2.9652202e+02  -3.2574754e+00      2s
       4       5169  -2.9613561e+02  -3.4140095e+00      2s
       5       6218  -2.9596592e+02  -3.5726364e+00      2s
       6       7205  -2.9563570e+02  -3.7689795e+00      2s
       7       8079  -2.9563570e+02  -4.0473582e+00      2s
       8       9410  -6.7075448e+01  -4.0508689e+00      2s
       9      10745  -4.1021171e+01  -4.0819330e+00      2s
      10      12147  -4.1021171e+01  -4.0891647e+00      2s
      11      13850  -4.1021171e+01  -4.0912482e+00      2s
      12      15442  -4.1021171e+01  -4.0970112e+00      2s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   35287    4.0993900e+01   0.000000e+00   4.485605e+02      5s
   49574    4.1000000e+01   0.000000e+00   0.000000e+00      7s
   49574    4.1000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 4.100000e+01, 49574 iterations, 5.89 seconds (4.37 work units)
Total elapsed time = 21.25s (DegenMoves)
Total elapsed time = 25.53s (DegenMoves)

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

     0     0   41.00000    0  533    7.00000   41.00000   486%     -   26s
H    0     0                      10.0000000   41.00000   310%     -   26s
     0     0   41.00000    0  826   10.00000   41.00000   310%     -   43s
     0     0   41.00000    0  810   10.00000   41.00000   310%     -   44s

Cutting planes:
  Gomory: 3
  Lift-and-project: 17
  Cover: 10
  Clique: 39
  MIR: 111
  StrongCG: 1
  Zero half: 55
  RLT: 42
  BQP: 5

Explored 1 nodes (72691 simplex iterations) in 50.20 seconds (54.35 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 10 7 

Time limit reached
Best objective 1.000000000000e+01, best bound 4.100000000000e+01, gap 310.0000%

Wrote result file './lp_solutions/grafo11292.33.sol'

