
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 00:19:07 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1722.12.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/grafo1722.12.lp
Reading time = 0.37 seconds
: 229622 rows, 592 columns, 689327 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 229622 rows, 592 columns and 689327 nonzeros
Model fingerprint: 0x5f310f4b
Variable types: 21 continuous, 571 integer (571 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 121003 rows and 0 columns
Presolve time: 1.58s
Presolved: 108619 rows, 592 columns, 326412 nonzeros
Variable types: 0 continuous, 592 integer (571 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 592 rows, 109211 columns, 327004 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         21    -infinity     -0.0000000e+00      2s
       1       1797  -2.5396911e+02  -1.3367466e+01      2s
       2       2253  -4.8000000e+01  -1.8240094e+01      2s
       3       2565  -3.4000000e+01  -2.2690586e+01      2s
       4       2855  -2.9000000e+01  -2.5798568e+01      2s
       5       3105  -2.9000000e+01  -2.8437799e+01      2s
       6       3339  -2.9000000e+01  -2.8902054e+01      2s

Sifting complete


Root relaxation: objective 2.900000e+01, 3567 iterations, 0.54 seconds (0.50 work units)
Total elapsed time = 8.09s (DegenMoves)

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

     0     0   29.00000    0  370    5.00000   29.00000   480%     -   10s
H    0     0                       6.0000000   29.00000   383%     -   10s
     0     0   29.00000    0  363    6.00000   29.00000   383%     -   16s
     0     0   29.00000    0  353    6.00000   29.00000   383%     -   17s
     0     0   29.00000    0  309    6.00000   29.00000   383%     -   28s
     0     0   29.00000    0  261    6.00000   29.00000   383%     -   30s
     0     0   29.00000    0  327    6.00000   29.00000   383%     -   39s
H    0     0                       7.0000000   29.00000   314%     -   40s
     0     0   29.00000    0  319    7.00000   29.00000   314%     -   41s
     0     0   29.00000    0  321    7.00000   29.00000   314%     -   50s

Cutting planes:
  Lift-and-project: 1
  Cover: 9
  Clique: 39
  MIR: 60
  StrongCG: 4
  Zero half: 21
  RLT: 66
  BQP: 2

Explored 1 nodes (22208 simplex iterations) in 50.06 seconds (58.35 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 7 6 5 -0 

Time limit reached
Best objective 7.000000000000e+00, best bound 2.899999999999e+01, gap 314.2857%

Wrote result file './lp_solutions/grafo1722.12.sol'

