
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 06:58:16 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3565.42.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/grafo3565.42.lp
Reading time = 0.14 seconds
: 84451 rows, 2193 columns, 255114 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 84451 rows, 2193 columns and 255114 nonzeros
Model fingerprint: 0x195a81b9
Variable types: 45 continuous, 2148 integer (2148 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 18870 rows and 27 columns
Presolve time: 0.58s
Presolved: 65581 rows, 2166 columns, 198954 nonzeros
Variable types: 0 continuous, 2166 integer (2121 binary)
Found heuristic solution: objective 6.0000000
Root relaxation presolved: 2163 rows, 67744 columns, 201120 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   25582    3.9755184e+01   0.000000e+00   9.214839e+03      5s
   35390    4.0000000e+01   0.000000e+00   0.000000e+00      7s
   35390    4.0000000e+01   0.000000e+00   0.000000e+00      7s
   35390    4.0000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 4.000000e+01, 35390 iterations, 6.24 seconds (5.21 work units)
Total elapsed time = 13.00s (DegenMoves)

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

     0     0   40.00000    0  420    6.00000   40.00000   567%     -   14s
H    0     0                       7.0000000   40.00000   471%     -   14s
H    0     0                       8.0000000   40.00000   400%     -   22s
     0     0   40.00000    0  603    8.00000   40.00000   400%     -   22s
     0     0   40.00000    0  510    8.00000   40.00000   400%     -   23s
     0     0   40.00000    0  431    8.00000   40.00000   400%     -   50s

Cutting planes:
  Gomory: 2
  Lift-and-project: 38
  Cover: 6
  Clique: 9
  MIR: 87
  StrongCG: 2
  Zero half: 99
  RLT: 41

Explored 1 nodes (75588 simplex iterations) in 50.08 seconds (49.48 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 8 7 6 3 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.000000000000e+01, gap 400.0000%

Wrote result file './lp_solutions/grafo3565.42.sol'

