
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 01:28:35 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1130.23.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/grafo1130.23.lp
Reading time = 0.87 seconds
: 530652 rows, 1493 columns, 1593361 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 530652 rows, 1493 columns and 1593361 nonzeros
Model fingerprint: 0xe69279c2
Variable types: 37 continuous, 1456 integer (1456 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 273593 rows and 0 columns
Presolve time: 3.67s
Presolved: 257059 rows, 1493 columns, 772798 nonzeros
Variable types: 0 continuous, 1493 integer (1456 binary)
Found heuristic solution: objective 12.0000000
Root relaxation presolved: 1484 rows, 258543 columns, 774291 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         37    -infinity     -0.0000000e+00      5s
       1       1898  -4.0612500e+08  -2.7075000e+01      5s
       2       3042  -1.1250625e+06  -2.7600016e+01      5s
       3       3489  -1.1250625e+06  -2.7900026e+01      5s
       4       4057  -6.5000000e+01  -2.9354906e+01      5s
       5       4518  -5.4750000e+01  -3.0527651e+01      5s
       6       4980  -5.3000000e+01  -3.1966842e+01      5s
       7       5424  -5.3000000e+01  -3.3801015e+01      5s
       8       6006  -5.3000000e+01  -3.4352587e+01      5s
       9       6498  -5.3000000e+01  -3.5324809e+01      5s
      10       7067  -5.3000000e+01  -3.7949834e+01      5s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    9673    5.3000000e+01   0.000000e+00   2.718040e+03      6s
   41228    5.2923977e+01   0.000000e+00   6.220749e+02     10s
   52318    5.3000000e+01   0.000000e+00   0.000000e+00     12s
   52318    5.3000000e+01   0.000000e+00   0.000000e+00     12s
   52318    5.3000000e+01   0.000000e+00   0.000000e+00     12s

Root relaxation: objective 5.300000e+01, 52318 iterations, 7.92 seconds (5.76 work units)
Total elapsed time = 44.30s (DegenMoves)
Total elapsed time = 48.14s (DegenMoves)

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

     0     0   53.00000    0  681   12.00000   53.00000   342%     -   50s

Explored 1 nodes (61132 simplex iterations) in 50.11 seconds (53.89 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 12 -0 

Time limit reached
Best objective 1.200000000000e+01, best bound 5.300000000000e+01, gap 341.6667%

Wrote result file './lp_solutions/grafo1130.23.sol'

