
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 07:54:30 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4053.43.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/grafo4053.43.lp
Reading time = 0.25 seconds
: 153932 rows, 2628 columns, 464147 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 153932 rows, 2628 columns and 464147 nonzeros
Model fingerprint: 0x1244fe5a
Variable types: 52 continuous, 2576 integer (2576 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 47510 rows and 27 columns
Presolve time: 1.14s
Presolved: 106422 rows, 2601 columns, 321928 nonzeros
Variable types: 0 continuous, 2601 integer (2549 binary)
Root relaxation presolved: 2598 rows, 109020 columns, 324529 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   17676    5.4867444e+01   0.000000e+00   7.584406e+04      5s
   40725    5.4769865e+01   0.000000e+00   1.527692e+04     10s
   58364    5.5000000e+01   0.000000e+00   0.000000e+00     14s
   58364    5.5000000e+01   0.000000e+00   0.000000e+00     15s
   58364    5.5000000e+01   0.000000e+00   0.000000e+00     15s

Root relaxation: objective 5.500000e+01, 58364 iterations, 13.16 seconds (10.30 work units)
Total elapsed time = 29.48s (DegenMoves)
Total elapsed time = 30.62s (DegenMoves)

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

     0     0   55.00000    0  581          -   55.00000      -     -   32s
H    0     0                       3.0000000   55.00000  1733%     -   32s
H    0     0                       5.0000000   55.00000  1000%     -   32s
     0     0          -    0         5.00000   55.00000  1000%     -   50s

Cutting planes:
  Gomory: 38
  Cover: 60
  Clique: 49
  MIR: 265
  StrongCG: 2
  GUB cover: 9
  Zero half: 54
  RLT: 97
  BQP: 12

Explored 1 nodes (81412 simplex iterations) in 50.03 seconds (49.96 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 5 3 

Time limit reached
Best objective 5.000000000000e+00, best bound 5.500000000000e+01, gap 1000.0000%

Wrote result file './lp_solutions/grafo4053.43.sol'

