
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 05:38:02 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4222.48.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/grafo4222.48.lp
Reading time = 0.24 seconds
: 125550 rows, 2982 columns, 379329 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 125550 rows, 2982 columns and 379329 nonzeros
Model fingerprint: 0xeb014fdf
Variable types: 54 continuous, 2928 integer (2928 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 32892 rows and 76 columns
Presolve time: 0.83s
Presolved: 92658 rows, 2906 columns, 280924 nonzeros
Variable types: 0 continuous, 2906 integer (2852 binary)
Found heuristic solution: objective 15.0000000
Root relaxation presolved: 2893 rows, 95551 columns, 283830 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   15851    4.6959679e+01   0.000000e+00   4.350732e+04      5s
   31318    4.6939306e+01   0.000000e+00   1.387693e+04     10s
   45970    4.6931810e+01   0.000000e+00   9.489930e+03     15s
   59808    4.6929947e+01   0.000000e+00   5.273258e+01     20s
   61784    4.7000000e+01   0.000000e+00   0.000000e+00     21s
   61784    4.7000000e+01   0.000000e+00   0.000000e+00     21s
   61784    4.7000000e+01   0.000000e+00   0.000000e+00     21s

Root relaxation: objective 4.700000e+01, 61784 iterations, 19.76 seconds (14.85 work units)
Total elapsed time = 35.03s (DegenMoves)

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

     0     0   47.00000    0  414   15.00000   47.00000   213%     -   36s
H    0     0                      16.0000000   47.00000   194%     -   36s
     0     0   47.00000    0  797   16.00000   47.00000   194%     -   46s
     0     0   47.00000    0  718   16.00000   47.00000   194%     -   48s

Cutting planes:
  Gomory: 7
  Lift-and-project: 2
  Cover: 21
  Clique: 15
  MIR: 149
  StrongCG: 1
  Zero half: 101
  RLT: 28
  BQP: 6
  PSD: 1

Explored 1 nodes (79438 simplex iterations) in 50.42 seconds (38.40 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 16 15 

Time limit reached
Best objective 1.600000000000e+01, best bound 4.700000000000e+01, gap 193.7500%

Wrote result file './lp_solutions/grafo4222.48.sol'

