
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 06:04:33 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3687.41.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/grafo3687.41.lp
Reading time = 0.28 seconds
: 137654 rows, 2325 columns, 414941 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 137654 rows, 2325 columns and 414941 nonzeros
Model fingerprint: 0xaa2923d5
Variable types: 47 continuous, 2278 integer (2278 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 49381 rows and 20 columns
Presolve time: 0.88s
Presolved: 88273 rows, 2305 columns, 267245 nonzeros
Variable types: 0 continuous, 2305 integer (2258 binary)
Root relaxation presolved: 2299 rows, 90572 columns, 269550 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   22573    5.0853095e+01   0.000000e+00   7.340487e+04      5s
   47455    5.0800492e+01   0.000000e+00   2.649542e+04     10s
   62378    5.1000000e+01   0.000000e+00   0.000000e+00     13s
   62378    5.1000000e+01   0.000000e+00   0.000000e+00     13s
   62378    5.1000000e+01   0.000000e+00   0.000000e+00     13s

Root relaxation: objective 5.100000e+01, 62378 iterations, 12.10 seconds (9.18 work units)
Total elapsed time = 28.97s (DegenMoves)
Total elapsed time = 31.89s (DegenMoves)

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

     0     0   51.00000    0  525          -   51.00000      -     -   34s
H    0     0                       7.0000000   51.00000   629%     -   34s
     0     0   51.00000    0  827    7.00000   51.00000   629%     -   47s
H    0     0                       8.0000000   51.00000   537%     -   48s
     0     0   51.00000    0  770    8.00000   51.00000   537%     -   48s

Cutting planes:
  Gomory: 5
  Cover: 16
  Clique: 18
  MIR: 133
  StrongCG: 1
  GUB cover: 1
  Zero half: 48
  RLT: 24
  BQP: 5

Explored 1 nodes (88322 simplex iterations) in 50.20 seconds (52.29 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 7 

Time limit reached
Best objective 8.000000000000e+00, best bound 5.100000000000e+01, gap 537.5000%

Wrote result file './lp_solutions/grafo3687.41.sol'

