
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Thu Nov 14 04:16:49 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1542.49.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/grafo1542.49.lp
Reading time = 0.21 seconds
: 109471 rows, 2862 columns, 330782 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 109471 rows, 2862 columns and 330782 nonzeros
Model fingerprint: 0xc24cd2d6
Variable types: 52 continuous, 2810 integer (2810 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 16300 rows and 50 columns
Presolve time: 1.30s
Presolved: 93171 rows, 2812 columns, 282337 nonzeros
Variable types: 0 continuous, 2812 integer (2760 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 2812 rows, 95983 columns, 285149 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   13054    4.4954649e+01   0.000000e+00   3.201843e+04      5s
   26543    4.4932164e+01   0.000000e+00   3.289652e+03     10s
   39612    4.4926772e+01   0.000000e+00   4.008156e+03     15s
   50401    4.5000000e+01   0.000000e+00   0.000000e+00     20s
   50401    4.5000000e+01   0.000000e+00   0.000000e+00     20s

Root relaxation: objective 4.500000e+01, 50401 iterations, 18.00 seconds (12.33 work units)
Total elapsed time = 41.88s (DegenMoves)

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

     0     0   45.00000    0  764    7.00000   45.00000   543%     -   50s

Explored 1 nodes (70521 simplex iterations) in 50.06 seconds (41.86 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 7 

Time limit reached
Best objective 7.000000000000e+00, best bound 4.500000000000e+01, gap 542.8571%

Wrote result file './lp_solutions/grafo1542.49.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 07:42:15 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1542.49.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/grafo1542.49.lp
Reading time = 0.17 seconds
: 109471 rows, 2862 columns, 330782 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 109471 rows, 2862 columns and 330782 nonzeros
Model fingerprint: 0xc24cd2d6
Variable types: 52 continuous, 2810 integer (2810 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 16300 rows and 50 columns
Presolve time: 0.80s
Presolved: 93171 rows, 2812 columns, 282337 nonzeros
Variable types: 0 continuous, 2812 integer (2760 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 2812 rows, 95983 columns, 285149 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   19411    4.4939412e+01   0.000000e+00   2.613821e+04      5s
   38028    4.4927103e+01   0.000000e+00   5.644171e+03     10s
   50401    4.5000000e+01   0.000000e+00   0.000000e+00     14s
   50401    4.5000000e+01   0.000000e+00   0.000000e+00     14s

Root relaxation: objective 4.500000e+01, 50401 iterations, 12.84 seconds (12.33 work units)
Total elapsed time = 31.83s (DegenMoves)
Total elapsed time = 40.89s (DegenMoves)

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

     0     0   45.00000    0  614    7.00000   45.00000   543%     -   41s
H    0     0                       9.0000000   45.00000   400%     -   41s
     0     0          -    0         9.00000   45.00000   400%     -   50s

Cutting planes:
  Gomory: 37
  Cover: 44
  Clique: 14
  MIR: 138
  StrongCG: 1
  GUB cover: 6
  Zero half: 52
  RLT: 57
  BQP: 3

Explored 1 nodes (77880 simplex iterations) in 50.01 seconds (53.49 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 9 7 

Time limit reached
Best objective 9.000000000000e+00, best bound 4.500000000000e+01, gap 400.0000%

Wrote result file './lp_solutions/grafo1542.49.sol'

