
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 05:07:45 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3784.36.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/grafo3784.36.lp
Reading time = 0.47 seconds
: 279596 rows, 1776 columns, 840208 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 279596 rows, 1776 columns and 840208 nonzeros
Model fingerprint: 0xd38fabb0
Variable types: 38 continuous, 1738 integer (1738 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 159149 rows and 61 columns
Presolve time: 1.96s
Presolved: 120447 rows, 1715 columns, 363066 nonzeros
Variable types: 0 continuous, 1715 integer (1677 binary)
Root relaxation presolved: 1715 rows, 122162 columns, 364781 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        438    -infinity     -4.0278488e+00      3s
       1       1846  -3.6939790e+02  -4.1155465e+00      3s
       2       3758  -3.3240752e+02  -4.1837400e+00      3s
       3       6023  -3.3120974e+02  -4.3103798e+00      3s
       4       7975  -3.2921682e+02  -4.5208000e+00      3s
       5       9573  -3.2921682e+02  -4.6998295e+00      3s
       6      10876  -3.9522076e+01  -4.7132615e+00      3s
       7      12205  -3.4022981e+01  -4.7316444e+00      3s
       8      13776  -3.4022981e+01  -4.7494808e+00      3s
       9      15547  -3.4022981e+01  -4.7607867e+00      3s
      10      17441  -3.4022981e+01  -4.7657175e+00      3s
      11      19308  -3.4022981e+01  -4.7801768e+00      3s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   31989    3.3994575e+01   0.000000e+00   2.579994e+02      5s
   41042    3.4000000e+01   0.000000e+00   0.000000e+00      7s
   41042    3.4000000e+01   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 3.400000e+01, 41042 iterations, 4.54 seconds (3.91 work units)
Total elapsed time = 19.38s (DegenMoves)
Total elapsed time = 20.32s (DegenMoves)

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

     0     0   34.00000    0  339          -   34.00000      -     -   21s
H    0     0                       4.0000000   34.00000   750%     -   24s
     0     0   34.00000    0  491    4.00000   34.00000   750%     -   28s
H    0     0                      11.0000000   34.00000   209%     -   29s
     0     0   34.00000    0  488   11.00000   34.00000   209%     -   29s
     0     0   34.00000    0  427   11.00000   34.00000   209%     -   46s
H    0     0                      12.0000000   34.00000   183%     -   47s
     0     0   34.00000    0  394   12.00000   34.00000   183%     -   49s

Cutting planes:
  Cover: 27
  Clique: 28
  MIR: 159
  StrongCG: 1
  GUB cover: 2
  Zero half: 2
  RLT: 20
  BQP: 4

Explored 1 nodes (62724 simplex iterations) in 50.06 seconds (53.14 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 12 11 4 

Time limit reached
Best objective 1.200000000000e+01, best bound 3.400000000000e+01, gap 183.3333%

Wrote result file './lp_solutions/grafo3784.36.sol'

