Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:16 2012

Optimize a model with 539 rows, 46 columns and 1078 nonzeros
Presolve removed 396 rows and 0 columns
Presolve time: 0.01s
Presolved: 143 rows, 46 columns, 834 nonzeros
Variable types: 0 continuous, 46 integer (46 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.028986e+00, 61 iterations, 0.00 seconds

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

     0     0    9.02899    0   28    7.00000    9.02899  29.0%     -    0s
H    0     0                       8.0000000    9.02899  12.9%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 3
  Zero half: 5

Explored 0 nodes (61 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 9.000000000000e+00, gap 12.5000%