
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 09:02:32 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6870.44.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/grafo6870.44.lp
Reading time = 0.27 seconds
: 174267 rows, 3260 columns, 526057 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 174267 rows, 3260 columns and 526057 nonzeros
Model fingerprint: 0x79789a18
Variable types: 61 continuous, 3199 integer (3199 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 -0.0000000
Presolve removed 43081 rows and 0 columns
Presolve time: 1.07s
Presolved: 131186 rows, 3260 columns, 397357 nonzeros
Variable types: 0 continuous, 3260 integer (3199 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 3212 rows, 134398 columns, 400617 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   15269    6.5758429e+01   0.000000e+00   1.333050e+05      5s
   31779    6.5648446e+01   0.000000e+00   1.423429e+05     10s
   48271    6.5624187e+01   0.000000e+00   6.911291e+04     15s
   63699    6.5617348e+01   0.000000e+00   2.421076e+03     20s
   72317    6.6000000e+01   0.000000e+00   0.000000e+00     23s
   72317    6.6000000e+01   0.000000e+00   0.000000e+00     23s
   72317    6.6000000e+01   0.000000e+00   0.000000e+00     23s

Root relaxation: objective 6.600000e+01, 72317 iterations, 21.79 seconds (17.86 work units)

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

     0     0   66.00000    0 1557    7.00000   66.00000   843%     -   50s

Explored 1 nodes (83809 simplex iterations) in 50.06 seconds (44.18 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 7 -0 

Time limit reached
Best objective 7.000000000000e+00, best bound 6.600000000000e+01, gap 842.8571%

Wrote result file './lp_solutions/grafo6870.44.sol'

