
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Thu Nov 14 06:33:31 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3780.50.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/grafo3780.50.lp
Reading time = 0.26 seconds
: 149193 rows, 3212 columns, 450440 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 149193 rows, 3212 columns and 450440 nonzeros
Model fingerprint: 0x516523d8
Variable types: 57 continuous, 3155 integer (3155 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, 6e+01]
Presolve removed 29416 rows and 21 columns
Presolve time: 1.44s
Presolved: 119777 rows, 3191 columns, 362634 nonzeros
Variable types: 0 continuous, 3191 integer (3134 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 3179 rows, 122956 columns, 365825 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   14124    5.8961886e+01   0.000000e+00   5.596424e+04      5s
   29172    5.4927324e+01   0.000000e+00   1.955776e+04     10s
   41940    5.4921579e+01   0.000000e+00   1.634012e+03     15s
   52428    5.4920783e+01   0.000000e+00   2.468643e+01     20s
   53919    5.5000000e+01   0.000000e+00   0.000000e+00     21s
   53919    5.5000000e+01   0.000000e+00   0.000000e+00     21s
   53919    5.5000000e+01   0.000000e+00   0.000000e+00     21s

Root relaxation: objective 5.500000e+01, 53919 iterations, 18.93 seconds (11.17 work units)

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

     0     0   55.00000    0 1195    8.00000   55.00000   588%     -   50s

Explored 1 nodes (67314 simplex iterations) in 50.04 seconds (35.45 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 8 

Time limit reached
Best objective 8.000000000000e+00, best bound 5.500000000000e+01, gap 587.5000%

Wrote result file './lp_solutions/grafo3780.50.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 07:58:11 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3780.50.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/grafo3780.50.lp
Reading time = 0.24 seconds
: 149193 rows, 3212 columns, 450440 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 149193 rows, 3212 columns and 450440 nonzeros
Model fingerprint: 0x516523d8
Variable types: 57 continuous, 3155 integer (3155 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, 6e+01]
Presolve removed 29416 rows and 21 columns
Presolve time: 0.99s
Presolved: 119777 rows, 3191 columns, 362634 nonzeros
Variable types: 0 continuous, 3191 integer (3134 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 3179 rows, 122956 columns, 365825 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   18228    5.4944406e+01   0.000000e+00   2.154413e+04      5s
   36924    5.4922772e+01   0.000000e+00   8.314242e+03     10s
   53796    5.4920781e+01   0.000000e+00   2.420934e+00     15s
   53919    5.5000000e+01   0.000000e+00   0.000000e+00     15s
   53919    5.5000000e+01   0.000000e+00   0.000000e+00     15s
   53919    5.5000000e+01   0.000000e+00   0.000000e+00     15s

Root relaxation: objective 5.500000e+01, 53919 iterations, 13.90 seconds (11.17 work units)
Total elapsed time = 42.77s (DegenMoves)
Total elapsed time = 45.89s (DegenMoves)

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

     0     0   55.00000    0  740    8.00000   55.00000   587%     -   47s
H    0     0                      16.0000000   55.00000   244%     -   47s

Cutting planes:
  Cover: 56
  Clique: 18
  MIR: 237
  StrongCG: 1
  GUB cover: 3

Explored 1 nodes (75100 simplex iterations) in 50.04 seconds (47.16 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 16 8 

Time limit reached
Best objective 1.600000000000e+01, best bound 5.500000000000e+01, gap 243.7500%

Wrote result file './lp_solutions/grafo3780.50.sol'

