
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 06:42:19 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7191.41.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/grafo7191.41.lp
Reading time = 0.16 seconds
: 99913 rows, 2206 columns, 301526 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 99913 rows, 2206 columns and 301526 nonzeros
Model fingerprint: 0x9812417b
Variable types: 46 continuous, 2160 integer (2160 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]
Found heuristic solution: objective -0.0000000
Presolve removed 27170 rows and 30 columns
Presolve time: 0.72s
Presolved: 72743 rows, 2176 columns, 220465 nonzeros
Variable types: 0 continuous, 2176 integer (2130 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 2176 rows, 74919 columns, 222641 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   24396    4.4729138e+01   0.000000e+00   3.419864e+03      5s
   45648    4.5000000e+01   0.000000e+00   0.000000e+00      9s
   45648    4.5000000e+01   0.000000e+00   0.000000e+00      9s

Root relaxation: objective 4.500000e+01, 45648 iterations, 8.41 seconds (7.01 work units)
Total elapsed time = 19.13s (DegenMoves)
Total elapsed time = 20.88s (DegenMoves)

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

     0     0   45.00000    0  552    7.00000   45.00000   543%     -   24s
H    0     0                       8.0000000   45.00000   462%     -   27s
     0     0   45.00000    0  873    8.00000   45.00000   462%     -   38s
     0     0   45.00000    0  839    8.00000   45.00000   462%     -   41s
     0     0          -    0         8.00000   45.00000   462%     -   50s

Cutting planes:
  Gomory: 4
  Lift-and-project: 25
  Cover: 7
  Clique: 13
  MIR: 135
  GUB cover: 1
  Zero half: 44
  RLT: 45
  BQP: 4

Explored 1 nodes (72533 simplex iterations) in 50.09 seconds (48.00 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 8 7 -0 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.500000000000e+01, gap 462.5000%

Wrote result file './lp_solutions/grafo7191.41.sol'

