
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 06:46:50 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3870.38.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/grafo3870.38.lp
Reading time = 0.25 seconds
: 156712 rows, 2495 columns, 472582 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 156712 rows, 2495 columns and 472582 nonzeros
Model fingerprint: 0x361ba3b4
Variable types: 52 continuous, 2443 integer (2443 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 52619 rows and 21 columns
Presolve time: 1.24s
Presolved: 104093 rows, 2474 columns, 315104 nonzeros
Variable types: 0 continuous, 2474 integer (2422 binary)
Root relaxation presolved: 2471 rows, 106564 columns, 317578 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   16637    5.8871016e+01   0.000000e+00   6.743206e+04      5s
   38618    5.5767517e+01   0.000000e+00   4.960122e+04     10s
   61466    5.5752431e+01   0.000000e+00   3.916932e+03     15s
   74085    5.6000000e+01   0.000000e+00   0.000000e+00     18s
   74085    5.6000000e+01   0.000000e+00   0.000000e+00     18s
   74085    5.6000000e+01   0.000000e+00   0.000000e+00     18s

Root relaxation: objective 5.600000e+01, 74085 iterations, 16.45 seconds (12.27 work units)
Total elapsed time = 39.09s (DegenMoves)
Total elapsed time = 43.83s (DegenMoves)

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

     0     0   56.00000    0  648          -   56.00000      -     -   44s
H    0     0                       4.0000000   56.00000  1300%     -   47s
     0     0          -    0         4.00000   56.00000  1300%     -   50s

Cutting planes:
  Gomory: 34
  Cover: 31
  Clique: 28
  MIR: 128
  GUB cover: 6
  Zero half: 27
  RLT: 43
  BQP: 3

Explored 1 nodes (93700 simplex iterations) in 50.04 seconds (49.12 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 4 

Time limit reached
Best objective 4.000000000000e+00, best bound 5.600000000000e+01, gap 1300.0000%

Wrote result file './lp_solutions/grafo3870.38.sol'

