
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Thu Nov 14 06:45:16 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3938.43.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/grafo3938.43.lp
Reading time = 0.21 seconds
: 89273 rows, 2212 columns, 269543 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 89273 rows, 2212 columns and 269543 nonzeros
Model fingerprint: 0xd7ca2f06
Variable types: 45 continuous, 2167 integer (2167 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 20836 rows and 27 columns
Presolve time: 0.89s
Presolved: 68437 rows, 2185 columns, 207459 nonzeros
Variable types: 0 continuous, 2185 integer (2140 binary)
Found heuristic solution: objective 4.0000000
Root relaxation presolved: 2182 rows, 70619 columns, 209644 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   18957    4.1820915e+01   0.000000e+00   9.861247e+03      5s
   27307    4.2000000e+01   0.000000e+00   0.000000e+00      7s
   27307    4.2000000e+01   0.000000e+00   0.000000e+00      7s
   27307    4.2000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 4.200000e+01, 27307 iterations, 6.15 seconds (3.54 work units)
Total elapsed time = 17.32s (DegenMoves)

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

     0     0   42.00000    0  472    4.00000   42.00000   950%     -   18s
H    0     0                       8.0000000   42.00000   425%     -   18s
     0     0   42.00000    0  652    8.00000   42.00000   425%     -   30s
     0     0   42.00000    0  644    8.00000   42.00000   425%     -   32s
     0     0   42.00000    0  691    8.00000   42.00000   425%     -   50s

Cutting planes:
  Gomory: 3
  Lift-and-project: 32
  Cover: 15
  Clique: 5
  MIR: 128
  GUB cover: 2
  Zero half: 23
  RLT: 45

Explored 1 nodes (51683 simplex iterations) in 50.10 seconds (31.35 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 4 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.200000000000e+01, gap 425.0000%

Wrote result file './lp_solutions/grafo3938.43.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 05:54:55 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3938.43.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/grafo3938.43.lp
Reading time = 0.14 seconds
: 89273 rows, 2212 columns, 269543 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 89273 rows, 2212 columns and 269543 nonzeros
Model fingerprint: 0xd7ca2f06
Variable types: 45 continuous, 2167 integer (2167 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 20836 rows and 27 columns
Presolve time: 0.61s
Presolved: 68437 rows, 2185 columns, 207459 nonzeros
Variable types: 0 continuous, 2185 integer (2140 binary)
Found heuristic solution: objective 4.0000000
Root relaxation presolved: 2182 rows, 70619 columns, 209644 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   26637    4.1816095e+01   0.000000e+00   1.176966e+02      5s
   27307    4.2000000e+01   0.000000e+00   0.000000e+00      5s
   27307    4.2000000e+01   0.000000e+00   0.000000e+00      5s
   27307    4.2000000e+01   0.000000e+00   0.000000e+00      5s

Root relaxation: objective 4.200000e+01, 27307 iterations, 4.42 seconds (3.54 work units)
Total elapsed time = 13.12s (DegenMoves)

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

     0     0   42.00000    0  472    4.00000   42.00000   950%     -   14s
H    0     0                       8.0000000   42.00000   425%     -   14s
     0     0   42.00000    0  652    8.00000   42.00000   425%     -   22s
     0     0   42.00000    0  644    8.00000   42.00000   425%     -   23s
H    0     0                       9.0000000   42.00000   367%     -   48s
     0     0   42.00000    0  536    9.00000   42.00000   367%     -   48s
     0     0   42.00000    0  516    9.00000   42.00000   367%     -   49s

Cutting planes:
  Cover: 25
  Clique: 11
  MIR: 151
  StrongCG: 1
  GUB cover: 5
  RLT: 18

Explored 1 nodes (64371 simplex iterations) in 50.06 seconds (46.94 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 9 8 4 

Time limit reached
Best objective 9.000000000000e+00, best bound 4.200000000000e+01, gap 366.6667%

Wrote result file './lp_solutions/grafo3938.43.sol'

