
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 00:50:11 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo411.16.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/grafo411.16.lp
Reading time = 0.25 seconds
: 156437 rows, 622 columns, 469789 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 156437 rows, 622 columns and 469789 nonzeros
Model fingerprint: 0x9fd698ee
Variable types: 22 continuous, 600 integer (600 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 81114 rows and 7 columns
Presolve time: 1.29s
Presolved: 75323 rows, 615 columns, 226618 nonzeros
Variable types: 0 continuous, 615 integer (593 binary)
Found heuristic solution: objective 3.0000000
Root relaxation presolved: 612 rows, 75935 columns, 227233 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        230    -infinity     -1.0000329e+00      2s
       1       1484  -2.1252111e+06  -2.1720239e+00      2s
       2       2815  -6.1509319e+01  -5.1671559e+00      2s
       3       3770  -4.9358755e+01  -1.1316533e+01      2s
       4       4485  -4.1007986e+01  -1.3837255e+01      2s

Sifting complete


Root relaxation: objective 2.200000e+01, 5053 iterations, 0.45 seconds (0.39 work units)
Total elapsed time = 5.46s (DegenMoves)

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

     0     0   22.00000    0  148    3.00000   22.00000   633%     -    6s
H    0     0                       6.0000000   22.00000   267%     -    6s
H    0     0                       7.0000000   22.00000   214%     -    8s
     0     0   22.00000    0  252    7.00000   22.00000   214%     -    9s
     0     0   22.00000    0  258    7.00000   22.00000   214%     -   10s
H    0     0                       8.0000000   22.00000   175%     -   19s
     0     0   22.00000    0  255    8.00000   22.00000   175%     -   19s
     0     0   22.00000    0  236    8.00000   22.00000   175%     -   20s
     0     0   22.00000    0  242    8.00000   22.00000   175%     -   26s
     0     0   22.00000    0  234    8.00000   22.00000   175%     -   27s
H    0     0                       9.0000000   22.00000   144%     -   38s
     0     0   22.00000    0  183    9.00000   22.00000   144%     -   38s
     0     0   22.00000    0  159    9.00000   22.00000   144%     -   40s
     0     0   22.00000    0  180    9.00000   22.00000   144%     -   48s
     0     0          -    0         9.00000   22.00000   144%     -   50s

Cutting planes:
  Lift-and-project: 2
  Clique: 24
  MIR: 1
  Zero half: 5
  RLT: 11

Explored 1 nodes (28228 simplex iterations) in 50.11 seconds (48.26 work units)
Thread count was 8 (of 8 available processors)

Solution count 5: 9 8 7 ... 3

Time limit reached
Best objective 9.000000000000e+00, best bound 2.200000000000e+01, gap 144.4444%

Wrote result file './lp_solutions/grafo411.16.sol'

