Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:17 2012

Optimize a model with 586 rows, 49 columns and 1172 nonzeros
Presolve removed 404 rows and 0 columns
Presolve time: 0.01s
Presolved: 182 rows, 49 columns, 985 nonzeros
Variable types: 0 continuous, 49 integer (49 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.328928e+00, 107 iterations, 0.00 seconds

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

     0     0    9.32893    0   41    6.00000    9.32893  55.5%     -    0s
H    0     0                       7.0000000    9.32893  33.3%     -    0s
     0     0    8.76148    0   48    7.00000    8.76148  25.2%     -    0s
     0     0    8.68286    0   46    7.00000    8.68286  24.0%     -    0s
     0     0    8.62883    0   47    7.00000    8.62883  23.3%     -    0s
H    0     0                       8.0000000    8.62883  7.86%     -    0s

Cutting planes:
  Clique: 13
  Zero half: 7

Explored 0 nodes (230 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%