
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 06:53:13 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1844.42.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/grafo1844.42.lp
Reading time = 0.34 seconds
: 214835 rows, 2532 columns, 646771 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 214835 rows, 2532 columns and 646771 nonzeros
Model fingerprint: 0x2e66d87f
Variable types: 50 continuous, 2482 integer (2482 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 3.0000000
Presolve removed 83286 rows and 32 columns
Presolve time: 1.56s
Presolved: 131549 rows, 2500 columns, 397201 nonzeros
Variable types: 0 continuous, 2500 integer (2450 binary)
Found heuristic solution: objective 14.0000000
Root relaxation presolved: 2494 rows, 134043 columns, 399701 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   19394    5.9911940e+01   0.000000e+00   1.003700e+06      5s
   42730    5.1745533e+01   0.000000e+00   2.685763e+04     10s
   65374    5.1729518e+01   0.000000e+00   2.502699e+02     15s
   74112    5.2000000e+01   0.000000e+00   0.000000e+00     17s
   74112    5.2000000e+01   0.000000e+00   0.000000e+00     17s
   74112    5.2000000e+01   0.000000e+00   0.000000e+00     17s

Root relaxation: objective 5.200000e+01, 74112 iterations, 15.41 seconds (12.79 work units)
Total elapsed time = 46.25s (DegenMoves)

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

     0     0   52.00000    0  827   14.00000   52.00000   271%     -   50s

Explored 1 nodes (90061 simplex iterations) in 50.05 seconds (51.76 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 14 3 

Time limit reached
Best objective 1.400000000000e+01, best bound 5.200000000000e+01, gap 271.4286%

Wrote result file './lp_solutions/grafo1844.42.sol'

