
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 07:24:18 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6946.42.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/grafo6946.42.lp
Reading time = 0.24 seconds
: 149547 rows, 2544 columns, 450873 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 149547 rows, 2544 columns and 450873 nonzeros
Model fingerprint: 0xd14b8f48
Variable types: 51 continuous, 2493 integer (2493 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 47323 rows and 39 columns
Presolve time: 1.25s
Presolved: 102224 rows, 2505 columns, 309399 nonzeros
Variable types: 0 continuous, 2505 integer (2454 binary)
Found heuristic solution: objective 4.0000000
Root relaxation presolved: 2499 rows, 104723 columns, 311904 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   19413    5.1826974e+01   0.000000e+00   4.419244e+05      5s
   41443    5.1724157e+01   0.000000e+00   3.891888e+04     10s
   62863    5.1707190e+01   0.000000e+00   7.313096e+02     15s
   68008    5.2000000e+01   0.000000e+00   0.000000e+00     16s
   68008    5.2000000e+01   0.000000e+00   0.000000e+00     16s
   68008    5.2000000e+01   0.000000e+00   0.000000e+00     16s

Root relaxation: objective 5.200000e+01, 68008 iterations, 14.93 seconds (11.75 work units)
Total elapsed time = 37.07s (DegenMoves)
Total elapsed time = 42.90s (DegenMoves)

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

     0     0   52.00000    0  736    4.00000   52.00000  1200%     -   47s
H    0     0                       6.0000000   52.00000   767%     -   47s

Cutting planes:
  Cover: 41
  Clique: 34
  MIR: 157
  GUB cover: 6

Explored 1 nodes (88965 simplex iterations) in 50.07 seconds (55.59 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 6 4 -0 

Time limit reached
Best objective 6.000000000000e+00, best bound 5.200000000000e+01, gap 766.6667%

Wrote result file './lp_solutions/grafo6946.42.sol'

