
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 01:37:21 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo2739.23.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/grafo2739.23.lp
Reading time = 0.18 seconds
: 110705 rows, 842 columns, 332709 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 110705 rows, 842 columns and 332709 nonzeros
Model fingerprint: 0x0830fbf9
Variable types: 26 continuous, 816 integer (816 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 54702 rows and 16 columns
Presolve time: 0.97s
Presolved: 56003 rows, 826 columns, 168769 nonzeros
Variable types: 0 continuous, 826 integer (800 binary)
Found heuristic solution: objective 6.0000000
Root relaxation presolved: 826 rows, 56829 columns, 169595 nonzeros


Starting sifting (using dual simplex for sub-problems)...

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        168    -infinity     -1.0000000e+00      1s
       1       2153  -1.9862479e+02  -4.3805222e+00      1s
       2       3457  -1.9862479e+02  -9.6270247e+00      1s
       3       4298  -4.5139736e+01  -1.0157625e+01      2s
       4       4779  -2.6500000e+01  -1.0395391e+01      2s
       5       5141  -2.6000000e+01  -1.1332240e+01      2s
       6       5491  -2.6000000e+01  -1.3341608e+01      2s
       7       5841  -2.6000000e+01  -1.4321911e+01      2s
       8       6181  -2.6000000e+01  -1.4990517e+01      2s
       9       6519  -2.6000000e+01  -1.6004478e+01      2s
      10       6845  -2.6000000e+01  -1.7786063e+01      2s

Sifting complete


Root relaxation: objective 2.600000e+01, 11862 iterations, 0.96 seconds (0.78 work units)
Total elapsed time = 5.71s (DegenMoves)

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

     0     0   26.00000    0  295    6.00000   26.00000   333%     -    6s
     0     0   26.00000    0  408    6.00000   26.00000   333%     -   10s
     0     0   26.00000    0  373    6.00000   26.00000   333%     -   11s
     0     0   26.00000    0  221    6.00000   26.00000   333%     -   18s
H    0     0                       7.0000000   26.00000   271%     -   19s
     0     0   26.00000    0  205    7.00000   26.00000   271%     -   19s
     0     0   26.00000    0  321    7.00000   26.00000   271%     -   26s
     0     0   26.00000    0  277    7.00000   26.00000   271%     -   27s
H    0     0                       8.0000000   26.00000   225%     -   34s
     0     0   26.00000    0  374    8.00000   26.00000   225%     -   34s
     0     0   26.00000    0  345    8.00000   26.00000   225%     -   35s
     0     0   26.00000    0  351    8.00000   26.00000   225%     -   50s

Cutting planes:
  Cover: 3
  Clique: 12
  MIR: 16
  Zero half: 2
  RLT: 11

Explored 1 nodes (45947 simplex iterations) in 50.11 seconds (53.61 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 8 7 6 

Time limit reached
Best objective 8.000000000000e+00, best bound 2.600000000000e+01, gap 225.0000%

Wrote result file './lp_solutions/grafo2739.23.sol'

