
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 05:38:30 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7180.40.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/grafo7180.40.lp
Reading time = 0.12 seconds
: 72967 rows, 2169 columns, 220753 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 72967 rows, 2169 columns and 220753 nonzeros
Model fingerprint: 0xf668e41b
Variable types: 47 continuous, 2122 integer (2122 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 12130 rows and 37 columns
Presolve time: 0.50s
Presolved: 60837 rows, 2132 columns, 184750 nonzeros
Variable types: 0 continuous, 2132 integer (2085 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 2132 rows, 62969 columns, 186882 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   27857    4.2960192e+01   0.000000e+00   3.907383e+03      5s
   53777    4.2952673e+01   0.000000e+00   1.490242e+03     10s
   61532    4.3000000e+01   0.000000e+00   0.000000e+00     12s
   61532    4.3000000e+01   0.000000e+00   0.000000e+00     12s

Root relaxation: objective 4.300000e+01, 61532 iterations, 10.99 seconds (8.68 work units)
Total elapsed time = 19.70s (DegenMoves)
Total elapsed time = 20.02s (DegenMoves)

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

     0     0   43.00000    0  404    5.00000   43.00000   760%     -   20s
H    0     0                       7.0000000   43.00000   514%     -   20s
     0     0   43.00000    0  746    7.00000   43.00000   514%     -   27s
H    0     0                       8.0000000   43.00000   437%     -   28s
     0     0   43.00000    0  711    8.00000   43.00000   437%     -   28s
     0     0   43.00000    0  594    8.00000   43.00000   437%     -   50s

Cutting planes:
  Gomory: 9
  Lift-and-project: 33
  Cover: 6
  Clique: 6
  MIR: 126
  Zero half: 11
  RLT: 41
  BQP: 2

Explored 1 nodes (94950 simplex iterations) in 50.07 seconds (44.91 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 8 7 5 3 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.300000000000e+01, gap 437.5000%

Wrote result file './lp_solutions/grafo7180.40.sol'

