
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 05:46:55 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7681.40.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/grafo7681.40.lp
Reading time = 0.14 seconds
: 88411 rows, 2383 columns, 267422 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 88411 rows, 2383 columns and 267422 nonzeros
Model fingerprint: 0x9fc1918d
Variable types: 51 continuous, 2332 integer (2332 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]
Found heuristic solution: objective 1.0000000
Presolve removed 15411 rows and 0 columns
Presolve time: 0.49s
Presolved: 73000 rows, 2383 columns, 221592 nonzeros
Variable types: 0 continuous, 2383 integer (2332 binary)
Found heuristic solution: objective 6.0000000
Root relaxation presolved: 2341 rows, 75341 columns, 223975 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   21084    4.0929778e+01   0.000000e+00   4.938754e+04      5s
   42838    4.0908308e+01   0.000000e+00   1.983502e+04     10s
   64482    4.0899831e+01   0.000000e+00   3.960682e+03     15s
   86142    4.0897647e+01   0.000000e+00   2.276715e+01     20s
   89190    4.1000000e+01   0.000000e+00   0.000000e+00     21s
   89190    4.1000000e+01   0.000000e+00   0.000000e+00     21s
   89190    4.1000000e+01   0.000000e+00   0.000000e+00     21s

Root relaxation: objective 4.100000e+01, 89190 iterations, 20.17 seconds (18.69 work units)
Total elapsed time = 32.22s (DegenMoves)

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

     0     0   41.00000    0  510    6.00000   41.00000   583%     -   34s
H    0     0                       7.0000000   41.00000   486%     -   34s
     0     0   41.00000    0  759    7.00000   41.00000   486%     -   48s
H    0     0                       9.0000000   41.00000   356%     -   48s
     0     0   41.00000    0  752    9.00000   41.00000   356%     -   49s

Cutting planes:
  Cover: 16
  Clique: 11
  MIR: 132
  StrongCG: 2
  Zero half: 3
  RLT: 23

Explored 1 nodes (110144 simplex iterations) in 50.19 seconds (46.72 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 9 7 6 1 

Time limit reached
Best objective 9.000000000000e+00, best bound 4.100000000000e+01, gap 355.5556%

Wrote result file './lp_solutions/grafo7681.40.sol'

