
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 05:30:07 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6881.40.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/grafo6881.40.lp
Reading time = 0.22 seconds
: 135809 rows, 2419 columns, 409585 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 135809 rows, 2419 columns and 409585 nonzeros
Model fingerprint: 0x84355dcf
Variable types: 49 continuous, 2370 integer (2370 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 45753 rows and 45 columns
Presolve time: 0.97s
Presolved: 90056 rows, 2374 columns, 272704 nonzeros
Variable types: 0 continuous, 2374 integer (2325 binary)
Root relaxation presolved: 2368 rows, 92424 columns, 275078 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   21037    5.5932486e+01   0.000000e+00   5.421473e+04      5s
   45043    5.5828141e+01   0.000000e+00   3.026292e+04     10s
   69067    5.5811957e+01   0.000000e+00   1.339717e+03     15s
   76729    5.6000000e+01   0.000000e+00   0.000000e+00     17s
   76729    5.6000000e+01   0.000000e+00   0.000000e+00     17s
   76729    5.6000000e+01   0.000000e+00   0.000000e+00     17s

Root relaxation: objective 5.600000e+01, 76729 iterations, 15.55 seconds (11.78 work units)
Total elapsed time = 28.69s (DegenMoves)
Total elapsed time = 30.47s (DegenMoves)

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

     0     0   56.00000    0  566          -   56.00000      -     -   31s
H    0     0                       6.0000000   56.00000   833%     -   31s
H    0     0                       9.0000000   56.00000   522%     -   32s
     0     0   56.00000    0 1024    9.00000   56.00000   522%     -   48s
H    0     0                      12.0000000   56.00000   367%     -   49s
     0     0          -    0        12.00000   56.00000   367%     -   50s

Cutting planes:
  Gomory: 4
  Cover: 4
  Clique: 19
  MIR: 85
  Zero half: 5
  RLT: 38
  BQP: 1

Explored 1 nodes (100176 simplex iterations) in 50.03 seconds (50.63 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 12 9 6 

Time limit reached
Best objective 1.200000000000e+01, best bound 5.600000000000e+01, gap 366.6667%

Wrote result file './lp_solutions/grafo6881.40.sol'

