
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Wed Nov 13 05:54:28 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4304.56.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/grafo4304.56.lp
Reading time = 0.26 seconds
: 120374 rows, 3382 columns, 363772 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 120374 rows, 3382 columns and 363772 nonzeros
Model fingerprint: 0x357c9d86
Variable types: 56 continuous, 3326 integer (3326 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, 6e+01]
Found heuristic solution: objective 4.0000000
Presolve removed 5984 rows and 2 columns
Presolve time: 1.05s
Presolved: 114390 rows, 3380 columns, 346122 nonzeros
Variable types: 0 continuous, 3380 integer (3324 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 3341 rows, 117731 columns, 349502 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   12488    4.9942858e+01   0.000000e+00   2.032453e+04      5s
   24929    4.9926527e+01   0.000000e+00   4.307035e+03     10s
   36083    4.9923122e+01   0.000000e+00   2.144833e+03     15s
   46808    4.9922439e+01   0.000000e+00   9.252273e+01     20s
   52572    5.0000000e+01   0.000000e+00   0.000000e+00     23s
   52572    5.0000000e+01   0.000000e+00   0.000000e+00     23s
   52572    5.0000000e+01   0.000000e+00   0.000000e+00     23s

Root relaxation: objective 5.000000e+01, 52572 iterations, 21.73 seconds (12.54 work units)

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

     0     0   50.00000    0 1726    8.00000   50.00000   525%     -   50s

Explored 1 nodes (64621 simplex iterations) in 50.04 seconds (32.74 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 4 

Time limit reached
Best objective 8.000000000000e+00, best bound 5.000000000000e+01, gap 525.0000%

Wrote result file './lp_solutions/grafo4304.56.sol'

