
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 00:22:28 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1754.13.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/grafo1754.13.lp
Reading time = 0.47 seconds
: 287800 rows, 627 columns, 863922 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 287800 rows, 627 columns and 863922 nonzeros
Model fingerprint: 0xd4dd34f5
Variable types: 21 continuous, 606 integer (606 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 1.0000000
Presolve removed 150323 rows and 1 columns
Presolve time: 2.01s
Presolved: 137477 rows, 626 columns, 413076 nonzeros
Variable types: 0 continuous, 626 integer (605 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 626 rows, 138103 columns, 413702 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        148    -infinity     -1.0000000e+00      3s
       1       1392  -1.4503509e+02  -7.9576271e+00      3s
       2       2050  -5.8500000e+01  -1.6013802e+01      3s
       3       2376  -2.8000000e+01  -2.3026394e+01      3s
       4       2678  -2.8000000e+01  -2.7633780e+01      3s

Sifting complete


Root relaxation: objective 2.800000e+01, 2953 iterations, 0.61 seconds (0.54 work units)
Total elapsed time = 6.53s (DegenMoves)
Total elapsed time = 11.51s (DegenMoves)

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

     0     0   28.00000    0  259    7.00000   28.00000   300%     -   13s
     0     0   28.00000    0  287    7.00000   28.00000   300%     -   17s
     0     0   28.00000    0  268    7.00000   28.00000   300%     -   18s
     0     0   28.00000    0  176    7.00000   28.00000   300%     -   27s
     0     0   28.00000    0  170    7.00000   28.00000   300%     -   28s
     0     0   28.00000    0  265    7.00000   28.00000   300%     -   35s
     0     0   28.00000    0  257    7.00000   28.00000   300%     -   37s
     0     0   28.00000    0  245    7.00000   28.00000   300%     -   50s

Cutting planes:
  Cover: 11
  Clique: 28
  MIR: 63
  Zero half: 59
  RLT: 56
  BQP: 2

Explored 1 nodes (20679 simplex iterations) in 50.07 seconds (59.29 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 7 1 

Time limit reached
Best objective 7.000000000000e+00, best bound 2.800000000000e+01, gap 300.0000%

Wrote result file './lp_solutions/grafo1754.13.sol'

