
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 10:22:18 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6512.46.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/grafo6512.46.lp
Reading time = 0.22 seconds
: 140696 rows, 2415 columns, 423923 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 140696 rows, 2415 columns and 423923 nonzeros
Model fingerprint: 0x6b0793e9
Variable types: 46 continuous, 2369 integer (2369 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]
Presolve removed 44349 rows and 19 columns
Presolve time: 1.05s
Presolved: 96347 rows, 2396 columns, 291115 nonzeros
Variable types: 0 continuous, 2396 integer (2350 binary)
Root relaxation presolved: 2393 rows, 98740 columns, 293511 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   21634    4.4787973e+01   0.000000e+00   3.789316e+03      5s
   32642    4.5000000e+01   0.000000e+00   0.000000e+00      7s
   32642    4.5000000e+01   0.000000e+00   0.000000e+00      7s
   32642    4.5000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 4.500000e+01, 32642 iterations, 6.08 seconds (5.28 work units)
Total elapsed time = 14.96s (DegenMoves)
Total elapsed time = 15.79s (DegenMoves)

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

     0     0   45.00000    0  493          -   45.00000      -     -   17s
H    0     0                       6.0000000   45.00000   650%     -   17s
H    0     0                       7.0000000   45.00000   543%     -   17s
     0     0   45.00000    0  841    7.00000   45.00000   543%     -   30s
H    0     0                       9.0000000   45.00000   400%     -   31s
     0     0   45.00000    0  698    9.00000   45.00000   400%     -   32s
     0     0   45.00000    0  739    9.00000   45.00000   400%     -   50s

Cutting planes:
  Gomory: 1
  Lift-and-project: 31
  Cover: 16
  Clique: 43
  MIR: 117
  StrongCG: 2
  GUB cover: 1
  Zero half: 35
  RLT: 61
  BQP: 10
  PSD: 2

Explored 1 nodes (60386 simplex iterations) in 50.03 seconds (52.41 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 9 7 6 

Time limit reached
Best objective 9.000000000000e+00, best bound 4.499999999925e+01, gap 400.0000%

Wrote result file './lp_solutions/grafo6512.46.sol'

