
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Thu Nov 14 04:08:26 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1490.47.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/grafo1490.47.lp
Reading time = 0.16 seconds
: 78665 rows, 2455 columns, 237862 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 78665 rows, 2455 columns and 237862 nonzeros
Model fingerprint: 0xe049ea2f
Variable types: 47 continuous, 2408 integer (2408 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 8168 rows and 1 columns
Presolve time: 0.68s
Presolved: 70497 rows, 2454 columns, 213752 nonzeros
Variable types: 0 continuous, 2454 integer (2407 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2418 rows, 72915 columns, 216206 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   18023    3.8942889e+01   0.000000e+00   1.828961e+04      5s
   36389    3.8933432e+01   0.000000e+00   5.538865e+02     10s
   47259    3.9000000e+01   0.000000e+00   0.000000e+00     14s
   47259    3.9000000e+01   0.000000e+00   0.000000e+00     14s
   47259    3.9000000e+01   0.000000e+00   0.000000e+00     14s

Root relaxation: objective 3.900000e+01, 47259 iterations, 12.76 seconds (8.26 work units)
Total elapsed time = 28.00s (DegenMoves)
Total elapsed time = 48.49s (DegenMoves)

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

     0     0   39.00000    0  613    8.00000   39.00000   387%     -   50s

Explored 1 nodes (78951 simplex iterations) in 50.03 seconds (46.98 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 8 

Time limit reached
Best objective 8.000000000000e+00, best bound 3.900000000000e+01, gap 387.5000%

Wrote result file './lp_solutions/grafo1490.47.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 07:09:32 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1490.47.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/grafo1490.47.lp
Reading time = 0.12 seconds
: 78665 rows, 2455 columns, 237862 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 78665 rows, 2455 columns and 237862 nonzeros
Model fingerprint: 0xe049ea2f
Variable types: 47 continuous, 2408 integer (2408 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 8168 rows and 1 columns
Presolve time: 0.44s
Presolved: 70497 rows, 2454 columns, 213752 nonzeros
Variable types: 0 continuous, 2454 integer (2407 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2418 rows, 72915 columns, 216206 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   26189    3.8936051e+01   0.000000e+00   1.741774e+03      5s
   47259    3.9000000e+01   0.000000e+00   0.000000e+00     10s
   47259    3.9000000e+01   0.000000e+00   0.000000e+00     10s
   47259    3.9000000e+01   0.000000e+00   0.000000e+00     10s

Root relaxation: objective 3.900000e+01, 47259 iterations, 9.04 seconds (8.26 work units)
Total elapsed time = 20.58s (DegenMoves)
Total elapsed time = 37.32s (DegenMoves)
Total elapsed time = 43.19s (DegenMoves)

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

     0     0   39.00000    0  613    8.00000   39.00000   387%     -   45s
H    0     0                      12.0000000   39.00000   225%     -   45s
     0     0          -    0        12.00000   39.00000   225%     -   50s

Cutting planes:
  Gomory: 31
  Cover: 34
  Clique: 1
  MIR: 97
  StrongCG: 1
  Zero half: 11
  RLT: 35
  BQP: 1

Explored 1 nodes (89317 simplex iterations) in 50.09 seconds (56.05 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 12 8 

Time limit reached
Best objective 1.200000000000e+01, best bound 3.900000000000e+01, gap 225.0000%

Wrote result file './lp_solutions/grafo1490.47.sol'

