
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 06:00:40 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6217.37.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/grafo6217.37.lp
Reading time = 0.28 seconds
: 167625 rows, 2247 columns, 504936 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 167625 rows, 2247 columns and 504936 nonzeros
Model fingerprint: 0xb5ab6dc5
Variable types: 48 continuous, 2199 integer (2199 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 64340 rows and 18 columns
Presolve time: 1.18s
Presolved: 103285 rows, 2229 columns, 312201 nonzeros
Variable types: 0 continuous, 2229 integer (2181 binary)
Found heuristic solution: objective 6.0000000
Root relaxation presolved: 2226 rows, 105511 columns, 314430 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   23177    5.4949288e+01   0.000000e+00   1.378734e+04      5s
   45326    5.5000000e+01   0.000000e+00   0.000000e+00      9s
   45326    5.5000000e+01   0.000000e+00   0.000000e+00      9s
   45326    5.5000000e+01   0.000000e+00   0.000000e+00      9s

Root relaxation: objective 5.500000e+01, 45326 iterations, 8.07 seconds (6.36 work units)
Total elapsed time = 25.00s (DegenMoves)
Total elapsed time = 30.59s (DegenMoves)

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

     0     0   55.00000    0  605    6.00000   55.00000   817%     -   32s
H    0     0                       9.0000000   55.00000   511%     -   33s
     0     0          -    0         9.00000   55.00000   511%     -   50s

Cutting planes:
  Gomory: 29
  Cover: 43
  Clique: 43
  MIR: 230
  StrongCG: 1
  GUB cover: 9
  Zero half: 77
  RLT: 92
  BQP: 11

Explored 1 nodes (69355 simplex iterations) in 50.03 seconds (57.24 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 9 6 -0 

Time limit reached
Best objective 9.000000000000e+00, best bound 5.500000000000e+01, gap 511.1111%

Wrote result file './lp_solutions/grafo6217.37.sol'

