Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:15 2012

Optimize a model with 519 rows, 46 columns and 1038 nonzeros
Presolve removed 367 rows and 0 columns
Presolve time: 0.01s
Presolved: 152 rows, 46 columns, 816 nonzeros
Variable types: 0 continuous, 46 integer (46 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.175258e+00, 85 iterations, 0.00 seconds

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

     0     0    9.17526    0   38    6.00000    9.17526  52.9%     -    0s
H    0     0                       8.0000000    9.17526  14.7%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Cutting planes:
  Gomory: 3
  Clique: 20
  Zero half: 48

Explored 0 nodes (100 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%