
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 00:35:44 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo4020.40.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/grafo4020.40.lp
Reading time = 0.22 seconds
: 123271 rows, 2090 columns, 371491 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 123271 rows, 2090 columns and 371491 nonzeros
Model fingerprint: 0x5b334218
Variable types: 42 continuous, 2048 integer (2048 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 44698 rows and 14 columns
Presolve time: 0.94s
Presolved: 78573 rows, 2076 columns, 237629 nonzeros
Variable types: 0 continuous, 2076 integer (2034 binary)
Root relaxation presolved: 2076 rows, 80649 columns, 239705 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   19785    4.9860078e+01   0.000000e+00   1.755964e+05      5s
   43942    4.9813102e+01   0.000000e+00   1.749868e+03     10s
   46916    5.0000000e+01   0.000000e+00   0.000000e+00     11s
   46916    5.0000000e+01   0.000000e+00   0.000000e+00     11s

Root relaxation: objective 5.000000e+01, 46916 iterations, 9.52 seconds (5.52 work units)
Total elapsed time = 17.21s (DegenMoves)
Total elapsed time = 20.11s (DegenMoves)

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

     0     0   50.00000    0  353          -   50.00000      -     -   21s
H    0     0                       9.0000000   50.00000   456%     -   22s
     0     0   50.00000    0  715    9.00000   50.00000   456%     -   30s
H    0     0                      11.0000000   50.00000   355%     -   31s
     0     0   50.00000    0  615   11.00000   50.00000   355%     -   32s
     0     0   50.00000    0  544   11.00000   50.00000   355%     -   50s

Cutting planes:
  Gomory: 5
  Lift-and-project: 39
  Cover: 8
  Clique: 28
  MIR: 132
  Zero half: 32
  RLT: 57
  BQP: 4

Explored 1 nodes (75542 simplex iterations) in 50.07 seconds (44.54 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 11 9 

Time limit reached
Best objective 1.100000000000e+01, best bound 5.000000000000e+01, gap 354.5455%

Wrote result file './lp_solutions/grafo4020.40.sol'

