
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 07:40:36 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3551.39.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/grafo3551.39.lp
Reading time = 0.27 seconds
: 163511 rows, 2270 columns, 492507 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 163511 rows, 2270 columns and 492507 nonzeros
Model fingerprint: 0x12dd23bb
Variable types: 46 continuous, 2224 integer (2224 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 3.0000000
Presolve removed 62855 rows and 8 columns
Presolve time: 1.04s
Presolved: 100656 rows, 2262 columns, 304340 nonzeros
Variable types: 0 continuous, 2262 integer (2216 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2252 rows, 102908 columns, 306602 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   22342    4.9838411e+01   0.000000e+00   8.661735e+04      5s
   47587    4.9786570e+01   0.000000e+00   8.176097e+03     10s
   58961    5.0000000e+01   0.000000e+00   0.000000e+00     12s
   58961    5.0000000e+01   0.000000e+00   0.000000e+00     12s
   58961    5.0000000e+01   0.000000e+00   0.000000e+00     12s

Root relaxation: objective 5.000000e+01, 58961 iterations, 11.15 seconds (8.48 work units)
Total elapsed time = 28.02s (DegenMoves)
Total elapsed time = 30.96s (DegenMoves)

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

     0     0   50.00000    0  599    8.00000   50.00000   525%     -   37s
H    0     0                      12.0000000   50.00000   317%     -   37s
     0     0          -    0        12.00000   50.00000   317%     -   50s

Cutting planes:
  Gomory: 28
  Cover: 26
  Clique: 38
  MIR: 114
  StrongCG: 1
  GUB cover: 1
  Zero half: 97
  RLT: 49
  BQP: 2

Explored 1 nodes (81919 simplex iterations) in 50.03 seconds (55.84 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 12 8 3 

Time limit reached
Best objective 1.200000000000e+01, best bound 5.000000000000e+01, gap 316.6667%

Wrote result file './lp_solutions/grafo3551.39.sol'

