
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 07:01:37 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3895.42.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/grafo3895.42.lp
Reading time = 0.20 seconds
: 121111 rows, 2460 columns, 365486 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 121111 rows, 2460 columns and 365486 nonzeros
Model fingerprint: 0xa73a90f8
Variable types: 49 continuous, 2411 integer (2411 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 37117 rows and 24 columns
Presolve time: 0.85s
Presolved: 83994 rows, 2436 columns, 254617 nonzeros
Variable types: 0 continuous, 2436 integer (2387 binary)
Root relaxation presolved: 2436 rows, 86430 columns, 257053 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   20604    5.0774950e+01   0.000000e+00   4.932996e+04      5s
   44177    5.0703926e+01   0.000000e+00   1.608481e+04     10s
   68113    5.0693167e+01   0.000000e+00   1.046891e+02     15s
   72338    5.1000000e+01   0.000000e+00   0.000000e+00     16s
   72338    5.1000000e+01   0.000000e+00   0.000000e+00     16s

Root relaxation: objective 5.100000e+01, 72338 iterations, 14.90 seconds (11.25 work units)
Total elapsed time = 30.42s (DegenMoves)

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

     0     0   51.00000    0  594          -   51.00000      -     -   32s
H    0     0                       6.0000000   51.00000   750%     -   32s
H    0     0                      10.0000000   51.00000   410%     -   32s
     0     0   51.00000    0  883   10.00000   51.00000   410%     -   47s
     0     0   51.00000    0  816   10.00000   51.00000   410%     -   48s

Cutting planes:
  Gomory: 5
  Lift-and-project: 3
  Cover: 19
  Clique: 17
  MIR: 139
  StrongCG: 1
  GUB cover: 1
  Zero half: 57
  RLT: 30

Explored 1 nodes (96172 simplex iterations) in 50.59 seconds (47.13 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 10 6 

Time limit reached
Best objective 1.000000000000e+01, best bound 5.100000000000e+01, gap 410.0000%

Wrote result file './lp_solutions/grafo3895.42.sol'

