
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 07:43:07 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3859.39.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/grafo3859.39.lp
Reading time = 0.39 seconds
: 241804 rows, 2397 columns, 727661 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 241804 rows, 2397 columns and 727661 nonzeros
Model fingerprint: 0x78073a75
Variable types: 49 continuous, 2348 integer (2348 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 2.0000000
Presolve removed 100548 rows and 19 columns
Presolve time: 1.81s
Presolved: 141256 rows, 2378 columns, 426382 nonzeros
Variable types: 0 continuous, 2378 integer (2329 binary)
Found heuristic solution: objective 4.0000000
Root relaxation presolved: 2375 rows, 143631 columns, 428760 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   19568    7.9998449e+01   0.000000e+00   7.721109e+04      5s
   42215    5.3846700e+01   0.000000e+00   4.721788e+04     10s
   65339    5.3803075e+01   0.000000e+00   1.909504e+03     15s
   87779    5.3795590e+01   0.000000e+00   1.046246e+01     20s
   88727    5.4000000e+01   0.000000e+00   0.000000e+00     20s
   88727    5.4000000e+01   0.000000e+00   0.000000e+00     20s
   88727    5.4000000e+01   0.000000e+00   0.000000e+00     20s

Root relaxation: objective 5.400000e+01, 88727 iterations, 18.43 seconds (13.71 work units)
Total elapsed time = 46.65s (DegenMoves)

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

     0     0   54.00000    0  663    4.00000   54.00000  1250%     -   50s

Explored 1 nodes (103154 simplex iterations) in 50.05 seconds (48.33 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 4 2 

Time limit reached
Best objective 4.000000000000e+00, best bound 5.400000000000e+01, gap 1250.0000%

Wrote result file './lp_solutions/grafo3859.39.sol'

