
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Wed Nov 13 03:54:10 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1991.31.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/grafo1991.31.lp
Reading time = 0.08 seconds
: 33148 rows, 1281 columns, 100363 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 33148 rows, 1281 columns and 100363 nonzeros
Model fingerprint: 0x5060d081
Variable types: 35 continuous, 1246 integer (1246 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 6962 rows and 21 columns
Presolve time: 0.31s
Presolved: 26186 rows, 1260 columns, 79720 nonzeros
Variable types: 0 continuous, 1260 integer (1225 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 15146 rows, 12300 columns, 57640 nonzeros


Root relaxation: objective 3.900000e+01, 2266 iterations, 0.97 seconds (0.63 work units)
Total elapsed time = 5.24s (DegenMoves)

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

     0     0   39.00000    0  426    5.00000   39.00000   680%     -    5s
H    0     0                       7.0000000   39.00000   457%     -    5s
H    0     0                       8.0000000   39.00000   388%     -    5s
H    0     0                      10.0000000   39.00000   290%     -   12s
     0     0   39.00000    0  693   10.00000   39.00000   290%     -   12s
H    0     0                      11.0000000   39.00000   255%     -   12s
     0     0   39.00000    0  643   11.00000   39.00000   255%     -   12s
     0     0   39.00000    0  375   11.00000   39.00000   255%     -   31s
     0     0   39.00000    0  375   11.00000   39.00000   255%     -   31s
     0     0   39.00000    0  371   11.00000   39.00000   255%     -   41s
     0     0   39.00000    0  370   11.00000   39.00000   255%     -   42s
     0     0   39.00000    0  506   11.00000   39.00000   255%     -   50s

Cutting planes:
  Cover: 19
  MIR: 187
  GUB cover: 3
  Zero half: 27
  RLT: 59

Explored 1 nodes (60736 simplex iterations) in 50.05 seconds (33.17 work units)
Thread count was 8 (of 8 available processors)

Solution count 6: 11 10 8 ... -0

Time limit reached
Best objective 1.100000000000e+01, best bound 3.900000000000e+01, gap 254.5455%

Wrote result file './lp_solutions/grafo1991.31.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 18 03:01:33 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1991.31.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/grafo1991.31.lp
Reading time = 0.08 seconds
: 33148 rows, 1281 columns, 100363 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 33148 rows, 1281 columns and 100363 nonzeros
Model fingerprint: 0x5060d081
Variable types: 35 continuous, 1246 integer (1246 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 6962 rows and 21 columns
Presolve time: 0.29s
Presolved: 26186 rows, 1260 columns, 79720 nonzeros
Variable types: 0 continuous, 1260 integer (1225 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 15146 rows, 12300 columns, 57640 nonzeros


Root relaxation: objective 3.900000e+01, 2266 iterations, 0.91 seconds (0.63 work units)
Total elapsed time = 5.00s (DegenMoves)

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

     0     0   39.00000    0  426    5.00000   39.00000   680%     -    5s
H    0     0                       7.0000000   39.00000   457%     -    5s
H    0     0                       8.0000000   39.00000   388%     -    5s
H    0     0                      10.0000000   39.00000   290%     -   11s
     0     0   39.00000    0  693   10.00000   39.00000   290%     -   12s
H    0     0                      11.0000000   39.00000   255%     -   12s
     0     0   39.00000    0  643   11.00000   39.00000   255%     -   12s
     0     0   39.00000    0  375   11.00000   39.00000   255%     -   31s
     0     0   39.00000    0  375   11.00000   39.00000   255%     -   31s
     0     0   39.00000    0  371   11.00000   39.00000   255%     -   42s
     0     0   39.00000    0  370   11.00000   39.00000   255%     -   42s
     0     0   39.00000    0  506   11.00000   39.00000   255%     -   50s

Cutting planes:
  Cover: 19
  MIR: 187
  GUB cover: 3
  Zero half: 27
  RLT: 59

Explored 1 nodes (59492 simplex iterations) in 50.05 seconds (32.37 work units)
Thread count was 8 (of 8 available processors)

Solution count 6: 11 10 8 ... -0

Time limit reached
Best objective 1.100000000000e+01, best bound 3.900000000000e+01, gap 254.5455%

Wrote result file './lp_solutions/grafo1991.31.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Wed Nov 20 04:04:51 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1991.31.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/grafo1991.31.lp
Reading time = 0.07 seconds
: 33148 rows, 1281 columns, 100363 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 33148 rows, 1281 columns and 100363 nonzeros
Model fingerprint: 0x5060d081
Variable types: 35 continuous, 1246 integer (1246 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 6962 rows and 21 columns
Presolve time: 0.26s
Presolved: 26186 rows, 1260 columns, 79720 nonzeros
Variable types: 0 continuous, 1260 integer (1225 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 15146 rows, 12300 columns, 57640 nonzeros


Root relaxation: objective 3.900000e+01, 2266 iterations, 0.83 seconds (0.63 work units)

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

     0     0   39.00000    0  426    5.00000   39.00000   680%     -    4s
H    0     0                       7.0000000   39.00000   457%     -    4s
H    0     0                       8.0000000   39.00000   388%     -    4s
H    0     0                      10.0000000   39.00000   290%     -   10s
     0     0   39.00000    0  693   10.00000   39.00000   290%     -   10s
H    0     0                      11.0000000   39.00000   255%     -   10s
     0     0   39.00000    0  643   11.00000   39.00000   255%     -   10s
     0     0   39.00000    0  375   11.00000   39.00000   255%     -   27s
     0     0   39.00000    0  375   11.00000   39.00000   255%     -   27s
     0     0   39.00000    0  371   11.00000   39.00000   255%     -   36s
     0     0   39.00000    0  370   11.00000   39.00000   255%     -   36s
     0     0   39.00000    0  430   11.00000   39.00000   255%     -   44s
     0     0   39.00000    0  445   11.00000   39.00000   255%     -   44s
     0     0   39.00000    0  572   11.00000   39.00000   255%     -   50s

Cutting planes:
  Gomory: 1
  Cover: 22
  MIR: 150
  GUB cover: 3
  Zero half: 75
  RLT: 67

Explored 1 nodes (70304 simplex iterations) in 50.04 seconds (38.13 work units)
Thread count was 8 (of 8 available processors)

Solution count 6: 11 10 8 ... -0

Time limit reached
Best objective 1.100000000000e+01, best bound 3.900000000000e+01, gap 254.5455%

Wrote result file './lp_solutions/grafo1991.31.sol'

