Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:09:20 2012

Optimize a model with 2966 rows, 552 columns and 9336 nonzeros
Presolve removed 692 rows and 2 columns
Presolve time: 0.07s
Presolved: 2297 rows, 550 columns, 13531 nonzeros
Variable types: 0 continuous, 550 integer (550 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 6.000000e+00, 1814 iterations, 0.19 seconds

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

     0     0    6.00000    0   41   23.00000    6.00000  73.9%     -    0s
H    0     0                       8.0000000    6.00000  25.0%     -    0s
*    0     0               0       6.0000000    6.00000   0.0%     -    0s

Cutting planes:
  Gomory: 3
  Zero half: 11

Explored 0 nodes (3873 simplex iterations) in 0.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%