
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 01:50:58 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1101.25.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/grafo1101.25.lp
Reading time = 0.34 seconds
: 211899 rows, 1227 columns, 636716 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 211899 rows, 1227 columns and 636716 nonzeros
Model fingerprint: 0x139ac0dc
Variable types: 34 continuous, 1193 integer (1193 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 -0.0000000
Presolve removed 105435 rows and 12 columns
Presolve time: 1.70s
Presolved: 106464 rows, 1215 columns, 320566 nonzeros
Variable types: 0 continuous, 1215 integer (1181 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 1215 rows, 107679 columns, 321781 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         34    -infinity     -0.0000000e+00      2s
       1       2869  -3.2263938e+02  -1.5776532e+01      2s
       2       3924  -2.6958438e+02  -1.6399251e+01      2s
       3       4830  -2.1236198e+02  -1.6775012e+01      2s
       4       5929  -2.1213542e+02  -1.6885809e+01      3s
       5       7210  -2.1213542e+02  -1.7935811e+01      3s
       6       8845  -8.0597222e+01  -1.7981216e+01      3s
       7      10232  -6.0919310e+01  -1.8378037e+01      3s
       8      10940  -4.3000000e+01  -1.8434448e+01      3s
       9      11686  -4.3000000e+01  -1.8558690e+01      3s
      10      12411  -4.3000000e+01  -1.8622127e+01      3s
      11      13138  -4.3000000e+01  -1.8804580e+01      3s
      12      13863  -4.3000000e+01  -1.8893637e+01      3s

Sifting complete


Root relaxation: objective 4.300000e+01, 24017 iterations, 2.61 seconds (2.16 work units)
Total elapsed time = 17.38s (DegenMoves)
Total elapsed time = 20.24s (DegenMoves)

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

     0     0   43.00000    0  466    5.00000   43.00000   760%     -   21s
H    0     0                       6.0000000   43.00000   617%     -   21s
     0     0   43.00000    0  625    6.00000   43.00000   617%     -   32s
     0     0   43.00000    0  605    6.00000   43.00000   617%     -   33s
     0     0   43.00000    0  535    6.00000   43.00000   617%     -   50s

Cutting planes:
  Gomory: 4
  Cover: 17
  Clique: 60
  MIR: 129
  StrongCG: 1
  Zero half: 50
  RLT: 87
  BQP: 9

Explored 1 nodes (44854 simplex iterations) in 50.04 seconds (58.82 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 6 5 -0 

Time limit reached
Best objective 6.000000000000e+00, best bound 4.299999999977e+01, gap 616.6667%

Wrote result file './lp_solutions/grafo1101.25.sol'

