Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:11 2012

Optimize a model with 228 rows, 31 columns and 456 nonzeros
Presolve removed 156 rows and 0 columns
Presolve time: 0.00s
Presolved: 72 rows, 31 columns, 341 nonzeros
Variable types: 0 continuous, 31 integer (31 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 6.818182e+00, 53 iterations, 0.00 seconds

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

     0     0    6.81818    0   25    5.00000    6.81818  36.4%     -    0s
     0     0    6.00000    0   21    5.00000    6.00000  20.0%     -    0s
     0     0    6.00000    0   20    5.00000    6.00000  20.0%     -    0s
H    0     0                       6.0000000    6.00000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 2
  Zero half: 1

Explored 0 nodes (85 simplex iterations) in 0.01 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%