
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Fri Nov 22 05:42:21 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7727.42.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/grafo7727.42.lp
Reading time = 0.14 seconds
: 90937 rows, 2430 columns, 274906 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 90937 rows, 2430 columns and 274906 nonzeros
Model fingerprint: 0xfb2ad541
Variable types: 50 continuous, 2380 integer (2380 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 16840 rows and 30 columns
Presolve time: 0.61s
Presolved: 74097 rows, 2400 columns, 224842 nonzeros
Variable types: 0 continuous, 2400 integer (2350 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2391 rows, 76488 columns, 227242 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   21265    4.8948013e+01   0.000000e+00   4.011471e+04      5s
   42888    4.8927532e+01   0.000000e+00   1.452022e+04     10s
   64091    4.8919901e+01   0.000000e+00   8.221193e+02     15s
   84913    4.8917832e+01   0.000000e+00   5.764995e+01     20s
   88305    4.9000000e+01   0.000000e+00   0.000000e+00     21s
   88305    4.9000000e+01   0.000000e+00   0.000000e+00     21s
   88305    4.9000000e+01   0.000000e+00   0.000000e+00     21s

Root relaxation: objective 4.900000e+01, 88305 iterations, 20.13 seconds (17.39 work units)
Total elapsed time = 36.06s (DegenMoves)
Total elapsed time = 40.39s (DegenMoves)

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

     0     0   49.00000    0  629    8.00000   49.00000   512%     -   41s
H    0     0                       9.0000000   49.00000   444%     -   41s
H    0     0                      10.0000000   49.00000   390%     -   43s
     0     0          -    0        10.00000   49.00000   390%     -   50s

Cutting planes:
  Gomory: 22
  Cover: 51
  Clique: 16
  MIR: 191
  StrongCG: 1
  GUB cover: 7
  Zero half: 103
  RLT: 65
  BQP: 6

Explored 1 nodes (113034 simplex iterations) in 50.08 seconds (48.26 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 10 9 8 

Time limit reached
Best objective 1.000000000000e+01, best bound 4.900000000000e+01, gap 390.0000%

Wrote result file './lp_solutions/grafo7727.42.sol'

