
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 02:30:44 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1291.28.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/grafo1291.28.lp
Reading time = 0.27 seconds
: 165494 rows, 1288 columns, 497533 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 165494 rows, 1288 columns and 497533 nonzeros
Model fingerprint: 0xbb85b5b6
Variable types: 34 continuous, 1254 integer (1254 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 78416 rows and 18 columns
Presolve time: 1.35s
Presolved: 87078 rows, 1270 columns, 262528 nonzeros
Variable types: 0 continuous, 1270 integer (1236 binary)
Found heuristic solution: objective 9.0000000
Root relaxation presolved: 1270 rows, 88348 columns, 263798 nonzeros


Starting sifting (using dual simplex for sub-problems)...

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        514    -infinity     -3.0000577e+00      2s
       1       3797  -3.1505341e+02  -7.7417221e+00      2s
       2       5277  -3.1505341e+02  -8.3508830e+00      2s
       3       6628  -6.4574002e+01  -8.3724065e+00      2s
       4       9417  -5.0906658e+01  -8.4021436e+00      2s
       5      11277  -3.6010233e+01  -8.4221523e+00      3s
       6      12811  -3.6010233e+01  -8.4232300e+00      3s
       7      14487  -3.6010233e+01  -8.4295963e+00      3s
       8      16098  -3.6010233e+01  -8.4363325e+00      3s
       9      17722  -3.6010233e+01  -8.5065409e+00      3s
      10      19524  -3.6010233e+01  -8.5125960e+00      3s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   35816    3.5958987e+01   0.000000e+00   1.705266e+03      5s
   48231    3.6000000e+01   0.000000e+00   0.000000e+00      7s
   48231    3.6000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 3.600000e+01, 48231 iterations, 5.02 seconds (3.89 work units)
Total elapsed time = 11.61s (DegenMoves)

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

     0     0   36.00000    0  327    9.00000   36.00000   300%     -   14s
H    0     0                      10.0000000   36.00000   260%     -   14s
     0     0   36.00000    0  527   10.00000   36.00000   260%     -   20s
     0     0   36.00000    0  508   10.00000   36.00000   260%     -   21s
     0     0   36.00000    0  317   10.00000   36.00000   260%     -   31s
     0     0   36.00000    0  269   10.00000   36.00000   260%     -   32s
     0     0   36.00000    0  353   10.00000   36.00000   260%     -   46s
     0     0   36.00000    0  333   10.00000   36.00000   260%     -   48s
     0     0          -    0        10.00000   36.00000   260%     -   50s

Cutting planes:
  Cover: 19
  Clique: 28
  MIR: 111
  StrongCG: 2
  Zero half: 148
  RLT: 42
  BQP: 2

Explored 1 nodes (76072 simplex iterations) in 50.02 seconds (58.45 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 10 9 

Time limit reached
Best objective 1.000000000000e+01, best bound 3.600000000000e+01, gap 260.0000%

Wrote result file './lp_solutions/grafo1291.28.sol'

