
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 19 05:01:51 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3358.36.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/grafo3358.36.lp
Reading time = 0.47 seconds
: 286633 rows, 1731 columns, 861268 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 286633 rows, 1731 columns and 861268 nonzeros
Model fingerprint: 0xe8bc8002
Variable types: 38 continuous, 1693 integer (1693 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 134828 rows and 15 columns
Presolve time: 2.14s
Presolved: 151805 rows, 1716 columns, 457078 nonzeros
Variable types: 0 continuous, 1716 integer (1678 binary)
Root relaxation presolved: 1716 rows, 153521 columns, 458794 nonzeros


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

    Iter     Pivots    Primal Obj      Dual Obj        Time
       0        328    -infinity     -2.0000000e+00      3s
       1       1992  -4.3832714e+02  -2.0993574e+00      3s
       2       4028  -3.9433585e+02  -2.2240367e+00      3s
       3       5388  -3.9233874e+02  -2.4192187e+00      3s
       4       6629  -3.9233874e+02  -2.5551877e+00      3s
       5       7815  -6.6362872e+01  -2.5783424e+00      3s
       6       9133  -3.5016336e+01  -2.5866113e+00      3s
       7      10264  -3.5016336e+01  -2.5904392e+00      3s
       8      11477  -3.5016336e+01  -2.5943721e+00      3s
       9      12792  -3.5016336e+01  -2.6008592e+00      4s
      10      14163  -3.5016336e+01  -2.6020679e+00      4s

Sifting complete


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   25158    3.4982993e+01   0.000000e+00   1.298465e+04      5s
   57550    3.4950195e+01   0.000000e+00   3.833694e+03     10s
   88833    3.5000000e+01   0.000000e+00   0.000000e+00     15s
   88833    3.5000000e+01   0.000000e+00   0.000000e+00     15s

Root relaxation: objective 3.500000e+01, 88833 iterations, 12.45 seconds (9.06 work units)
Total elapsed time = 15.35s (DegenMoves)
Total elapsed time = 27.00s (DegenMoves)
Total elapsed time = 30.98s (DegenMoves)

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

     0     0   35.00000    0  262          -   35.00000      -     -   33s
H    0     0                       2.0000000   35.00000  1650%     -   35s
     0     0   35.00000    0  549    2.00000   35.00000  1650%     -   44s
H    0     0                       8.0000000   35.00000   338%     -   46s
     0     0   35.00000    0  581    8.00000   35.00000   338%     -   46s

Cutting planes:
  Gomory: 2
  Lift-and-project: 23
  Cover: 6
  Clique: 15
  MIR: 65
  Zero half: 60
  RLT: 12
  BQP: 1

Explored 1 nodes (103569 simplex iterations) in 50.19 seconds (50.88 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 2 

Time limit reached
Best objective 8.000000000000e+00, best bound 3.500000000000e+01, gap 337.5000%

Wrote result file './lp_solutions/grafo3358.36.sol'

