
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 06:07:04 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3910.41.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/grafo3910.41.lp
Reading time = 0.14 seconds
: 84339 rows, 2120 columns, 254744 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 84339 rows, 2120 columns and 254744 nonzeros
Model fingerprint: 0xa75f090b
Variable types: 45 continuous, 2075 integer (2075 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 19543 rows and 28 columns
Presolve time: 0.55s
Presolved: 64796 rows, 2092 columns, 196461 nonzeros
Variable types: 0 continuous, 2092 integer (2047 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2092 rows, 66888 columns, 198553 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   24996    4.0955029e+01   0.000000e+00   8.727845e+03      5s
   50540    4.0946762e+01   0.000000e+00   3.336037e+03     10s
   55669    4.1000000e+01   0.000000e+00   0.000000e+00     11s
   55669    4.1000000e+01   0.000000e+00   0.000000e+00     11s

Root relaxation: objective 4.100000e+01, 55669 iterations, 10.35 seconds (9.72 work units)
Total elapsed time = 18.65s (DegenMoves)

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

     0     0   41.00000    0  466    8.00000   41.00000   412%     -   19s
H    0     0                      10.0000000   41.00000   310%     -   19s
     0     0   41.00000    0  640   10.00000   41.00000   310%     -   27s
     0     0   41.00000    0  572   10.00000   41.00000   310%     -   29s
H    0     0                      11.0000000   41.00000   273%     -   48s
H    0     0                      12.0000000   41.00000   242%     -   48s
     0     0   41.00000    0  379   12.00000   41.00000   242%     -   48s
H    0     0                      13.0000000   41.00000   215%     -   48s
     0     0          -    0        13.00000   41.00000   215%     -   50s

Cutting planes:
  Gomory: 3
  Lift-and-project: 2
  Cover: 3
  Clique: 7
  MIR: 87
  GUB cover: 1
  Zero half: 3
  RLT: 28
  BQP: 2

Explored 1 nodes (87800 simplex iterations) in 50.07 seconds (47.49 work units)
Thread count was 8 (of 8 available processors)

Solution count 5: 13 12 11 ... 8

Time limit reached
Best objective 1.300000000000e+01, best bound 4.100000000000e+01, gap 215.3846%

Wrote result file './lp_solutions/grafo3910.41.sol'

