
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 18 00:14:48 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1636.11.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/grafo1636.11.lp
Reading time = 0.19 seconds
: 108544 rows, 503 columns, 325968 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 108544 rows, 503 columns and 325968 nonzeros
Model fingerprint: 0xc6f34d7e
Variable types: 20 continuous, 483 integer (483 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 -0.0000000
Presolve removed 57292 rows and 6 columns
Presolve time: 0.94s
Presolved: 51252 rows, 497 columns, 154249 nonzeros
Variable types: 0 continuous, 497 integer (477 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 497 rows, 51749 columns, 154746 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         20    -infinity     -0.0000000e+00      1s
       1       1165  -1.8201667e+02  -9.1177180e+00      1s
       2       1810  -3.7052020e+01  -1.1693397e+01      1s
       3       2419  -3.4222222e+01  -1.5644736e+01      1s
       4       2811  -2.9055556e+01  -1.8102987e+01      1s
       5       3123  -2.6000000e+01  -2.4537696e+01      1s
       6       3411  -2.6000000e+01  -2.5898691e+01      1s

Sifting complete


Root relaxation: objective 2.600000e+01, 3697 iterations, 0.33 seconds (0.27 work units)

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

     0     0   26.00000    0  223    5.00000   26.00000   420%     -    4s
     0     0   26.00000    0  287    5.00000   26.00000   420%     -    7s
     0     0   26.00000    0  270    5.00000   26.00000   420%     -    8s
H    0     0                       6.0000000   26.00000   333%     -   14s
     0     0   26.00000    0  286    6.00000   26.00000   333%     -   14s
     0     0   26.00000    0  286    6.00000   26.00000   333%     -   15s
     0     0   26.00000    0  227    6.00000   26.00000   333%     -   20s
     0     0   26.00000    0  230    6.00000   26.00000   333%     -   21s
     0     0   26.00000    0  249    6.00000   26.00000   333%     -   26s
     0     0   26.00000    0  242    6.00000   26.00000   333%     -   27s
     0     0   26.00000    0  273    6.00000   26.00000   333%     -   31s
     0     0   26.00000    0  242    6.00000   26.00000   333%     -   32s
     0     0   26.00000    0  281    6.00000   26.00000   333%     -   36s
     0     0   26.00000    0  202    6.00000   26.00000   333%     -   39s
H    0     0                       7.0000000   26.00000   271%     -   41s
     0     2   26.00000    0  197    7.00000   26.00000   271%     -   45s
    19    24   25.50000    6  150    7.00000   26.00000   271%   341   50s

Cutting planes:
  Cover: 8
  Clique: 30
  MIR: 59
  StrongCG: 3
  Zero half: 5
  RLT: 37
  Relax-and-lift: 1
  BQP: 2

Explored 23 nodes (33494 simplex iterations) in 50.08 seconds (48.80 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 7 6 5 -0 

Time limit reached
Best objective 7.000000000000e+00, best bound 2.600000000000e+01, gap 271.4286%

Wrote result file './lp_solutions/grafo1636.11.sol'


Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 00:16:36 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1636.11.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/grafo1636.11.lp
Reading time = 0.18 seconds
: 108544 rows, 503 columns, 325968 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 108544 rows, 503 columns and 325968 nonzeros
Model fingerprint: 0xc6f34d7e
Variable types: 20 continuous, 483 integer (483 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 -0.0000000
Presolve removed 57292 rows and 6 columns
Presolve time: 0.85s
Presolved: 51252 rows, 497 columns, 154249 nonzeros
Variable types: 0 continuous, 497 integer (477 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 497 rows, 51749 columns, 154746 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0         20    -infinity     -0.0000000e+00      1s
       1       1165  -1.8201667e+02  -9.1177180e+00      1s
       2       1810  -3.7052020e+01  -1.1693397e+01      1s
       3       2419  -3.4222222e+01  -1.5644736e+01      1s
       4       2811  -2.9055556e+01  -1.8102987e+01      1s
       5       3123  -2.6000000e+01  -2.4537696e+01      1s
       6       3411  -2.6000000e+01  -2.5898691e+01      1s

Sifting complete


Root relaxation: objective 2.600000e+01, 3697 iterations, 0.31 seconds (0.27 work units)

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

     0     0   26.00000    0  223    5.00000   26.00000   420%     -    4s
     0     0   26.00000    0  287    5.00000   26.00000   420%     -    6s
     0     0   26.00000    0  270    5.00000   26.00000   420%     -    7s
H    0     0                       6.0000000   26.00000   333%     -   12s
     0     0   26.00000    0  286    6.00000   26.00000   333%     -   12s
     0     0   26.00000    0  286    6.00000   26.00000   333%     -   13s
     0     0   26.00000    0  227    6.00000   26.00000   333%     -   17s
     0     0   26.00000    0  230    6.00000   26.00000   333%     -   18s
     0     0   26.00000    0  249    6.00000   26.00000   333%     -   22s
     0     0   26.00000    0  242    6.00000   26.00000   333%     -   23s
     0     0   26.00000    0  273    6.00000   26.00000   333%     -   27s
     0     0   26.00000    0  242    6.00000   26.00000   333%     -   28s
     0     0   26.00000    0  281    6.00000   26.00000   333%     -   32s
     0     0   26.00000    0  202    6.00000   26.00000   333%     -   34s
H    0     0                       7.0000000   26.00000   271%     -   37s
     0     2   26.00000    0  197    7.00000   26.00000   271%     -   40s
    27    32   25.50000    7  157    7.00000   26.00000   271%   258   45s
    49    53   25.50000   12  216    7.00000   26.00000   271%   333   50s

Cutting planes:
  Cover: 8
  Clique: 30
  MIR: 59
  StrongCG: 3
  Zero half: 5
  RLT: 37
  Relax-and-lift: 1
  BQP: 2

Explored 52 nodes (43271 simplex iterations) in 50.06 seconds (59.05 work units)
Thread count was 8 (of 8 available processors)

Solution count 4: 7 6 5 -0 

Time limit reached
Best objective 7.000000000000e+00, best bound 2.600000000000e+01, gap 271.4286%

Wrote result file './lp_solutions/grafo1636.11.sol'

