Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:52 2012

Optimize a model with 2639 rows, 506 columns and 8314 nonzeros
Presolve removed 932 rows and 2 columns
Presolve time: 0.06s
Presolved: 1707 rows, 504 columns, 9470 nonzeros
Variable types: 0 continuous, 504 integer (504 binary)
Found heuristic solution: objective 22.0000000

Root relaxation: objective 6.000000e+00, 1129 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   61   22.00000    6.00000  72.7%     -    0s
H    0     0                      12.0000000    6.00000  50.0%     -    0s
H    0     0                       8.0000000    6.00000  25.0%     -    0s
     0     0    6.00000    0  166    8.00000    6.00000  25.0%     -    0s
H    0     0                       7.0000000    6.00000  14.3%     -    0s
H    0     0                       6.0000000    6.00000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 4

Explored 0 nodes (4089 simplex iterations) in 0.41 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%