
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 05:09:19 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1514.47.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/grafo1514.47.lp
Reading time = 0.20 seconds
: 92442 rows, 2597 columns, 279407 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 92442 rows, 2597 columns and 279407 nonzeros
Model fingerprint: 0x96cc9420
Variable types: 48 continuous, 2549 integer (2549 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 18528 rows and 52 columns
Presolve time: 0.70s
Presolved: 73914 rows, 2545 columns, 224204 nonzeros
Variable types: 0 continuous, 2545 integer (2497 binary)
Root relaxation presolved: 2533 rows, 76447 columns, 226749 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   17846    4.7970152e+01   0.000000e+00   3.373970e+04      5s
   36396    4.7955340e+01   0.000000e+00   3.796569e+03     10s
   53196    4.7952231e+01   0.000000e+00   3.901330e+01     15s
   54015    4.8000000e+01   0.000000e+00   0.000000e+00     15s
   54015    4.8000000e+01   0.000000e+00   0.000000e+00     15s
   54015    4.8000000e+01   0.000000e+00   0.000000e+00     15s

Root relaxation: objective 4.800000e+01, 54015 iterations, 14.24 seconds (10.01 work units)
Total elapsed time = 26.25s (DegenMoves)

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

     0     0   48.00000    0  490          -   48.00000      -     -   29s
H    0     0                      15.0000000   48.00000   220%     -   29s
H    0     0                      19.0000000   48.00000   153%     -   31s
     0     0   48.00000    0  759   19.00000   48.00000   153%     -   42s
     0     0   48.00000    0  697   19.00000   48.00000   153%     -   43s
     0     0          -    0        19.00000   48.00000   153%     -   50s

Cutting planes:
  Gomory: 2
  Lift-and-project: 42
  Cover: 11
  Clique: 1
  MIR: 154
  StrongCG: 1
  GUB cover: 1
  Zero half: 81
  RLT: 83

Explored 1 nodes (73796 simplex iterations) in 50.17 seconds (32.38 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 19 15 

Time limit reached
Best objective 1.900000000000e+01, best bound 4.800000000000e+01, gap 152.6316%

Wrote result file './lp_solutions/grafo1514.47.sol'

