
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 07:30:10 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7220.42.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/grafo7220.42.lp
Reading time = 0.18 seconds
: 113422 rows, 2483 columns, 342419 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 113422 rows, 2483 columns and 342419 nonzeros
Model fingerprint: 0x045c7925
Variable types: 50 continuous, 2433 integer (2433 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 31417 rows and 33 columns
Presolve time: 0.80s
Presolved: 82005 rows, 2450 columns, 248683 nonzeros
Variable types: 0 continuous, 2450 integer (2400 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 2450 rows, 84455 columns, 251133 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   21748    5.4721217e+01   0.000000e+00   3.636012e+04      5s
   44188    5.4708594e+01   0.000000e+00   1.238024e+03     10s
   49662    5.5000000e+01   0.000000e+00   0.000000e+00     11s
   49662    5.5000000e+01   0.000000e+00   0.000000e+00     11s

Root relaxation: objective 5.500000e+01, 49662 iterations, 10.38 seconds (8.40 work units)
Total elapsed time = 23.01s (DegenMoves)
Total elapsed time = 25.91s (DegenMoves)

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

     0     0   55.00000    0  665    7.00000   55.00000   686%     -   26s
H    0     0                       9.0000000   55.00000   511%     -   26s
     0     0   55.00000    0 1002    9.00000   55.00000   511%     -   48s
     0     0          -    0         9.00000   55.00000   511%     -   50s

Cutting planes:
  Gomory: 3
  Cover: 1
  Clique: 5
  MIR: 92
  Zero half: 5
  RLT: 39

Explored 1 nodes (77066 simplex iterations) in 50.02 seconds (50.42 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 9 7 

Time limit reached
Best objective 9.000000000000e+00, best bound 5.500000000000e+01, gap 511.1111%

Wrote result file './lp_solutions/grafo7220.42.sol'

