
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Thu Nov 14 09:06:57 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5876.40.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/grafo5876.40.lp
Reading time = 0.15 seconds
: 72764 rows, 2144 columns, 220079 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 72764 rows, 2144 columns and 220079 nonzeros
Model fingerprint: 0xa680c23a
Variable types: 47 continuous, 2097 integer (2097 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 12355 rows and 48 columns
Presolve time: 0.71s
Presolved: 60409 rows, 2096 columns, 183523 nonzeros
Variable types: 0 continuous, 2096 integer (2049 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2093 rows, 62502 columns, 185619 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   17196    3.8973771e+01   0.000000e+00   3.194802e+04      5s
   36396    3.8960120e+01   0.000000e+00   1.504804e+03     10s
   54966    3.8957307e+01   0.000000e+00   8.122258e+01     15s
   59520    3.9000000e+01   0.000000e+00   0.000000e+00     17s
   59520    3.9000000e+01   0.000000e+00   0.000000e+00     17s
   59520    3.9000000e+01   0.000000e+00   0.000000e+00     17s

Root relaxation: objective 3.900000e+01, 59520 iterations, 15.78 seconds (9.61 work units)
Total elapsed time = 34.30s (DegenMoves)

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

     0     0   39.00000    0  774    8.00000   39.00000   388%     -   50s

Explored 1 nodes (87050 simplex iterations) in 50.02 seconds (45.11 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 -0 

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

Wrote result file './lp_solutions/grafo5876.40.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 04:16:52 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5876.40.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/grafo5876.40.lp
Reading time = 0.11 seconds
: 72764 rows, 2144 columns, 220079 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 72764 rows, 2144 columns and 220079 nonzeros
Model fingerprint: 0xa680c23a
Variable types: 47 continuous, 2097 integer (2097 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 12355 rows and 48 columns
Presolve time: 0.47s
Presolved: 60409 rows, 2096 columns, 183523 nonzeros
Variable types: 0 continuous, 2096 integer (2049 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2093 rows, 62502 columns, 185619 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   25516    3.8965357e+01   0.000000e+00   2.705498e+04      5s
   50165    3.8957640e+01   0.000000e+00   4.090417e+03     10s
   59520    3.9000000e+01   0.000000e+00   0.000000e+00     12s
   59520    3.9000000e+01   0.000000e+00   0.000000e+00     12s
   59520    3.9000000e+01   0.000000e+00   0.000000e+00     12s

Root relaxation: objective 3.900000e+01, 59520 iterations, 11.35 seconds (9.61 work units)
Total elapsed time = 26.44s (DegenMoves)
Total elapsed time = 49.62s (DegenMoves)

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

     0     0   39.00000    0  699    8.00000   39.00000   388%     -   50s

Explored 1 nodes (98905 simplex iterations) in 50.02 seconds (62.40 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 -0 

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

Wrote result file './lp_solutions/grafo5876.40.sol'

