
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 05:13:20 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4054.40.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/grafo4054.40.lp
Reading time = 0.16 seconds
: 98111 rows, 2197 columns, 296211 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 98111 rows, 2197 columns and 296211 nonzeros
Model fingerprint: 0xc70c2c10
Variable types: 47 continuous, 2150 integer (2150 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 26541 rows and 31 columns
Presolve time: 0.65s
Presolved: 71570 rows, 2166 columns, 216932 nonzeros
Variable types: 0 continuous, 2166 integer (2119 binary)
Found heuristic solution: objective 4.0000000
Root relaxation presolved: 2166 rows, 73736 columns, 219098 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   25206    4.5811657e+01   0.000000e+00   4.227870e+04      5s
   44206    4.6000000e+01   0.000000e+00   0.000000e+00      9s
   44206    4.6000000e+01   0.000000e+00   0.000000e+00      9s

Root relaxation: objective 4.600000e+01, 44206 iterations, 7.78 seconds (6.09 work units)
Total elapsed time = 20.60s (DegenMoves)

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

     0     0   46.00000    0  722    4.00000   46.00000  1050%     -   22s
H    0     0                       7.0000000   46.00000   557%     -   22s
H    0     0                       8.0000000   46.00000   475%     -   22s
     0     0   46.00000    0  916    8.00000   46.00000   475%     -   39s
     0     0   46.00000    0  903    8.00000   46.00000   475%     -   41s
     0     0   46.00000    0  870    8.00000   46.00000   475%     -   50s

Cutting planes:
  Gomory: 5
  Cover: 9
  Clique: 25
  MIR: 122
  StrongCG: 2
  Zero half: 61
  RLT: 82
  BQP: 4

Explored 1 nodes (70436 simplex iterations) in 50.08 seconds (45.06 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 8 7 4 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.600000000000e+01, gap 475.0000%

Wrote result file './lp_solutions/grafo4054.40.sol'

