
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 07:51:29 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7255.49.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/grafo7255.49.lp
Reading time = 0.14 seconds
: 90112 rows, 2762 columns, 272509 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 90112 rows, 2762 columns and 272509 nonzeros
Model fingerprint: 0x213ab483
Variable types: 51 continuous, 2711 integer (2711 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 7299 rows and 44 columns
Presolve time: 0.63s
Presolved: 82813 rows, 2718 columns, 251079 nonzeros
Variable types: 0 continuous, 2718 integer (2667 binary)
Root relaxation presolved: 2718 rows, 85531 columns, 253797 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   22766    4.4911531e+01   0.000000e+00   4.239151e+04      5s
   41132    4.5000000e+01   0.000000e+00   0.000000e+00      9s
   41132    4.5000000e+01   0.000000e+00   0.000000e+00     10s

Root relaxation: objective 4.500000e+01, 41132 iterations, 8.70 seconds (7.28 work units)
Total elapsed time = 22.13s (DegenMoves)

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

     0     0   45.00000    0  489          -   45.00000      -     -   24s
H    0     0                       4.0000000   45.00000  1025%     -   26s
     0     0   45.00000    0  804    4.00000   45.00000  1025%     -   33s
H    0     0                      12.0000000   45.00000   275%     -   34s
     0     0   45.00000    0  758   12.00000   45.00000   275%     -   34s
     0     0   45.00000    0  909   12.00000   45.00000   275%     -   50s

Cutting planes:
  Gomory: 8
  Lift-and-project: 27
  Cover: 9
  Clique: 1
  MIR: 115
  GUB cover: 2
  Zero half: 109
  RLT: 36

Explored 1 nodes (73111 simplex iterations) in 50.03 seconds (46.95 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 12 4 

Time limit reached
Best objective 1.200000000000e+01, best bound 4.500000000000e+01, gap 275.0000%

Wrote result file './lp_solutions/grafo7255.49.sol'

