Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:53 2012

Optimize a model with 2749 rows, 506 columns and 8644 nonzeros
Presolve removed 858 rows and 2 columns
Presolve time: 0.06s
Presolved: 1891 rows, 504 columns, 10924 nonzeros
Variable types: 0 continuous, 504 integer (504 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 6.000000e+00, 1477 iterations, 0.13 seconds

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

     0     0    6.00000    0   28   21.00000    6.00000  71.4%     -    0s
H    0     0                       9.0000000    6.00000  33.3%     -    0s
*    0     0               0       6.0000000    6.00000   0.0%     -    0s

Cutting planes:
  Gomory: 6
  Zero half: 3

Explored 0 nodes (3739 simplex iterations) in 0.42 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%