Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:09:23 2012

Optimize a model with 3384 rows, 600 columns and 10656 nonzeros
Presolve removed 369 rows and 0 columns
Presolve time: 0.05s
Presolved: 3015 rows, 600 columns, 17466 nonzeros
Variable types: 0 continuous, 600 integer (600 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 6.000000e+00, 1215 iterations, 0.07 seconds

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

     0     0    6.00000    0   14   18.00000    6.00000  66.7%     -    0s
H    0     0                       8.0000000    6.00000  25.0%     -    0s
H    0     0                       7.0000000    6.00000  14.3%     -    0s
     0     0    6.00000    0   16    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   29    7.00000    6.00000  14.3%     -    0s
H    0     0                       6.0000000    6.00000   0.0%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 2

Explored 0 nodes (3708 simplex iterations) in 0.44 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%