
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 09:31:04 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4027.45.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/grafo4027.45.lp
Reading time = 0.15 seconds
: 93666 rows, 2310 columns, 282801 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 93666 rows, 2310 columns and 282801 nonzeros
Model fingerprint: 0x311ba080
Variable types: 45 continuous, 2265 integer (2265 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 20592 rows and 22 columns
Presolve time: 0.62s
Presolved: 73074 rows, 2288 columns, 221401 nonzeros
Variable types: 0 continuous, 2288 integer (2243 binary)
Root relaxation presolved: 2285 rows, 75359 columns, 223689 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   24948    3.7732708e+01   0.000000e+00   4.979053e+03      5s
   36601    3.8000000e+01   0.000000e+00   0.000000e+00      7s
   36601    3.8000000e+01   0.000000e+00   0.000000e+00      7s
   36601    3.8000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 3.800000e+01, 36601 iterations, 6.57 seconds (5.28 work units)
Total elapsed time = 14.50s (DegenMoves)
Total elapsed time = 18.79s (DegenMoves)
Total elapsed time = 20.66s (DegenMoves)

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

     0     0   38.00000    0  450          -   38.00000      -     -   21s
H    0     0                       8.0000000   38.00000   375%     -   23s
     0     0   38.00000    0  748    8.00000   38.00000   375%     -   32s
H    0     0                      12.0000000   38.00000   217%     -   33s
     0     0   38.00000    0  739   12.00000   38.00000   217%     -   33s
     0     0   38.00000    0  766   12.00000   38.00000   217%     -   50s

Cutting planes:
  Gomory: 6
  Lift-and-project: 19
  Cover: 6
  Clique: 8
  MIR: 74
  Zero half: 110
  RLT: 41
  BQP: 1

Explored 1 nodes (70150 simplex iterations) in 50.11 seconds (47.86 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 12 8 

Time limit reached
Best objective 1.200000000000e+01, best bound 3.800000000000e+01, gap 216.6667%

Wrote result file './lp_solutions/grafo4027.45.sol'

