
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 05:56:28 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo5570.37.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/grafo5570.37.lp
Reading time = 0.40 seconds
: 249067 rows, 1911 columns, 748785 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 249067 rows, 1911 columns and 748785 nonzeros
Model fingerprint: 0xae6171fd
Variable types: 42 continuous, 1869 integer (1869 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 113112 rows and 24 columns
Presolve time: 2.06s
Presolved: 135955 rows, 1887 columns, 409722 nonzeros
Variable types: 0 continuous, 1887 integer (1845 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 1887 rows, 137842 columns, 411609 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        245    -infinity     -1.0000000e+00      3s
       1       1619  -4.0337782e+02  -1.0813390e+00      3s
       2       3463  -3.6288691e+02  -1.1828370e+00      3s
       3       5193  -3.5685753e+02  -1.2333037e+00      3s
       4       6645  -3.5685753e+02  -1.3986473e+00      3s
       5       7799  -5.1017170e+01  -1.4021112e+00      3s
       6       8931  -4.0014562e+01  -1.4369780e+00      3s
       7      10212  -4.0014562e+01  -1.4477988e+00      3s
       8      12324  -4.0014562e+01  -1.4616949e+00      3s
       9      14085  -4.0014562e+01  -1.4882294e+00      3s
      10      15790  -4.0014562e+01  -1.5047658e+00      3s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   26466    3.9962350e+01   0.000000e+00   3.982047e+04      5s
   54293    3.9921727e+01   0.000000e+00   1.434785e+03     10s
   81141    3.9917661e+01   0.000000e+00   3.484215e+02     15s
   90409    4.0000000e+01   0.000000e+00   0.000000e+00     17s
   90409    4.0000000e+01   0.000000e+00   0.000000e+00     17s

Root relaxation: objective 4.000000e+01, 90409 iterations, 14.64 seconds (10.66 work units)
Total elapsed time = 34.35s (DegenMoves)

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

     0     0   40.00000    0  638    8.00000   40.00000   400%     -   50s

Explored 1 nodes (106648 simplex iterations) in 50.04 seconds (63.26 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 1 

Time limit reached
Best objective 8.000000000000e+00, best bound 4.000000000000e+01, gap 400.0000%

Wrote result file './lp_solutions/grafo5570.37.sol'

