
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 06:20:04 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6421.44.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/grafo6421.44.lp
Reading time = 0.14 seconds
: 88120 rows, 2313 columns, 266181 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 88120 rows, 2313 columns and 266181 nonzeros
Model fingerprint: 0xeccd541a
Variable types: 46 continuous, 2267 integer (2267 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 17964 rows and 28 columns
Presolve time: 0.59s
Presolved: 70156 rows, 2285 columns, 212692 nonzeros
Variable types: 0 continuous, 2285 integer (2239 binary)
Root relaxation presolved: 2285 rows, 72441 columns, 214977 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   23007    4.4935228e+01   0.000000e+00   1.589754e+04      5s
   46174    4.4927172e+01   0.000000e+00   1.399320e+00     10s
   46458    4.5000000e+01   0.000000e+00   0.000000e+00     10s
   46458    4.5000000e+01   0.000000e+00   0.000000e+00     10s

Root relaxation: objective 4.500000e+01, 46458 iterations, 9.39 seconds (8.86 work units)
Total elapsed time = 18.94s (DegenMoves)
Total elapsed time = 20.79s (DegenMoves)

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

     0     0   45.00000    0  563          -   45.00000      -     -   21s
H    0     0                       8.0000000   45.00000   462%     -   21s
H    0     0                       9.0000000   45.00000   400%     -   21s
H    0     0                      11.0000000   45.00000   309%     -   24s
     0     0   45.00000    0  731   11.00000   45.00000   309%     -   32s
     0     0   45.00000    0  713   11.00000   45.00000   309%     -   33s
     0     0   45.00000    0  829   11.00000   45.00000   309%     -   50s

Cutting planes:
  Gomory: 1
  Lift-and-project: 33
  Cover: 13
  Clique: 9
  MIR: 85
  StrongCG: 1
  GUB cover: 1
  Zero half: 33
  RLT: 58
  BQP: 2

Explored 1 nodes (75646 simplex iterations) in 50.10 seconds (45.43 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 11 9 8 

Time limit reached
Best objective 1.100000000000e+01, best bound 4.500000000000e+01, gap 309.0909%

Wrote result file './lp_solutions/grafo6421.44.sol'

