
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 01:52:27 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo9978.41.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/grafo9978.41.lp
Reading time = 0.25 seconds
: 136988 rows, 2628 columns, 413502 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 136988 rows, 2628 columns and 413502 nonzeros
Model fingerprint: 0xc7be4ae5
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 38801 rows and 31 columns
Presolve time: 1.32s
Presolved: 98187 rows, 2597 columns, 297647 nonzeros
Variable types: 0 continuous, 2597 integer (2545 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2597 rows, 100784 columns, 300244 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   12129    4.4785593e+01   0.000000e+00   1.385053e+05      5s
   29934    4.4662706e+01   0.000000e+00   3.189174e+04     10s
   46314    4.4648121e+01   0.000000e+00   2.064529e+03     15s
   50311    4.5000000e+01   0.000000e+00   0.000000e+00     16s
   50311    4.5000000e+01   0.000000e+00   0.000000e+00     16s

Root relaxation: objective 4.500000e+01, 50311 iterations, 14.79 seconds (8.91 work units)
Total elapsed time = 30.41s (DegenMoves)

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

     0     0   45.00000    0  525    8.00000   45.00000   462%     -   32s
     0     0   45.00000    0  696    8.00000   45.00000   462%     -   46s
     0     0   45.00000    0  691    8.00000   45.00000   462%     -   49s

Cutting planes:
  Gomory: 1
  Cover: 12
  Clique: 24
  MIR: 111
  StrongCG: 1
  GUB cover: 1
  Zero half: 6
  RLT: 21

Explored 1 nodes (68633 simplex iterations) in 50.04 seconds (38.67 work units)
Thread count was 8 (of 8 available processors)

Solution count 1: 8 

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

Wrote result file './lp_solutions/grafo9978.41.sol'

