
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 06:17:09 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5645.41.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/grafo5645.41.lp
Reading time = 0.15 seconds
: 92713 rows, 2124 columns, 279862 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 92713 rows, 2124 columns and 279862 nonzeros
Model fingerprint: 0x26d89713
Variable types: 45 continuous, 2079 integer (2079 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 27147 rows and 37 columns
Presolve time: 0.67s
Presolved: 65566 rows, 2087 columns, 198883 nonzeros
Variable types: 0 continuous, 2087 integer (2042 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2084 rows, 67650 columns, 200970 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   26487    3.6824034e+01   0.000000e+00   6.532224e+02      5s
   28982    3.7000000e+01   0.000000e+00   0.000000e+00      5s
   28982    3.7000000e+01   0.000000e+00   0.000000e+00      6s
   28982    3.7000000e+01   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 3.700000e+01, 28982 iterations, 4.71 seconds (3.87 work units)
Total elapsed time = 11.35s (DegenMoves)

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

     0     0   37.00000    0  407    8.00000   37.00000   362%     -   12s
H    0     0                      10.0000000   37.00000   270%     -   12s
H    0     0                      13.0000000   37.00000   185%     -   12s
     0     0   37.00000    0  641   13.00000   37.00000   185%     -   20s
H    0     0                      14.0000000   37.00000   164%     -   21s
     0     0   37.00000    0  642   14.00000   37.00000   164%     -   22s
H    0     0                      15.0000000   37.00000   147%     -   44s
H    0     0                      16.0000000   37.00000   131%     -   44s
H    0     0                      18.0000000   37.00000   106%     -   44s
     0     0   37.00000    0  512   18.00000   37.00000   106%     -   44s
     0     0   37.00000    0  488   18.00000   37.00000   106%     -   45s
     0     0          -    0        18.00000   37.00000   106%     -   50s

Cutting planes:
  Gomory: 1
  Lift-and-project: 1
  Cover: 21
  Clique: 13
  MIR: 106
  StrongCG: 2
  GUB cover: 3
  Zero half: 42
  RLT: 62

Explored 1 nodes (62706 simplex iterations) in 50.08 seconds (43.81 work units)
Thread count was 8 (of 8 available processors)

Solution count 7: 18 16 15 ... 8

Time limit reached
Best objective 1.800000000000e+01, best bound 3.700000000000e+01, gap 105.5556%

Wrote result file './lp_solutions/grafo5645.41.sol'

