Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:24 2012

Optimize a model with 811 rows, 56 columns and 1622 nonzeros
Presolve removed 573 rows and 0 columns
Presolve time: 0.01s
Presolved: 238 rows, 56 columns, 1413 nonzeros
Variable types: 0 continuous, 56 integer (56 binary)
Found heuristic solution: objective 5.0000000

Root relaxation: objective 9.432416e+00, 123 iterations, 0.00 seconds

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

     0     0    9.43242    0   52    5.00000    9.43242  88.6%     -    0s
H    0     0                       6.0000000    9.43242  57.2%     -    0s
     0     0    9.14450    0   53    6.00000    9.14450  52.4%     -    0s
H    0     0                       8.0000000    9.14450  14.3%     -    0s
     0     0    9.07680    0   54    8.00000    9.07680  13.5%     -    0s
     0     0    9.02452    0   53    8.00000    9.02452  12.8%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 15
  Zero half: 35

Explored 0 nodes (261 simplex iterations) in 0.06 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%