
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 02:26:27 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo2429.27.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/grafo2429.27.lp
Reading time = 0.43 seconds
: 262906 rows, 1289 columns, 789801 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 262906 rows, 1289 columns and 789801 nonzeros
Model fingerprint: 0xd3da9d0f
Variable types: 34 continuous, 1255 integer (1255 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 1.0000000
Presolve removed 130906 rows and 9 columns
Presolve time: 2.06s
Presolved: 132000 rows, 1280 columns, 397213 nonzeros
Variable types: 0 continuous, 1280 integer (1246 binary)
Found heuristic solution: objective 9.0000000
Root relaxation presolved: 1280 rows, 133280 columns, 398493 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        203    -infinity     -1.0000000e+00      3s
       1       3108  -3.3489736e+02  -1.8887358e+01      3s
       2       4166  -2.3290156e+02  -1.9219338e+01      3s
       3       5334  -2.0390156e+02  -1.9618772e+01      3s
       4       6604  -1.7590156e+02  -1.9670438e+01      3s
       5       7824  -1.5290156e+02  -2.0427952e+01      3s
       6       9022  -1.5290156e+02  -2.0957308e+01      3s
       7       9626  -6.3046875e+01  -2.1091990e+01      3s
       8      10099  -5.3546875e+01  -2.1145559e+01      3s
       9      10614  -4.4546875e+01  -2.1216335e+01      3s
      10      11019  -4.0555556e+01  -2.1451703e+01      3s
      11      11412  -3.9000000e+01  -2.1640094e+01      3s
      12      11857  -3.9000000e+01  -2.2884376e+01      3s
      13      12283  -3.9000000e+01  -2.4716797e+01      4s
      14      12764  -3.9000000e+01  -2.8623558e+01      4s

Sifting complete


Root relaxation: objective 3.900000e+01, 13943 iterations, 1.52 seconds (1.37 work units)
Total elapsed time = 20.23s (DegenMoves)
Total elapsed time = 26.05s (DegenMoves)

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

     0     0   39.00000    0  514    9.00000   39.00000   333%     -   27s
     0     0   39.00000    0  640    9.00000   39.00000   333%     -   41s
     0     0   39.00000    0  619    9.00000   39.00000   333%     -   43s
     0     0          -    0         9.00000   39.00000   333%     -   50s

Cutting planes:
  Gomory: 2
  Cover: 28
  Clique: 41
  MIR: 124
  StrongCG: 1
  GUB cover: 1
  Zero half: 36
  RLT: 105
  BQP: 16

Explored 1 nodes (30209 simplex iterations) in 50.03 seconds (60.14 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 9 1 

Time limit reached
Best objective 9.000000000000e+00, best bound 3.900000000000e+01, gap 333.3333%

Wrote result file './lp_solutions/grafo2429.27.sol'

