Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:20 2012

Optimize a model with 661 rows, 53 columns and 1322 nonzeros
Presolve removed 454 rows and 0 columns
Presolve time: 0.01s
Presolved: 207 rows, 53 columns, 1092 nonzeros
Variable types: 0 continuous, 53 integer (53 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.019880e+01, 124 iterations, 0.00 seconds

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

     0     0   10.19880    0   42    6.00000   10.19880  70.0%     -    0s
H    0     0                       7.0000000   10.19880  45.7%     -    0s
H    0     0                       8.0000000   10.19880  27.5%     -    0s
     0     0    9.43695    0   51    8.00000    9.43695  18.0%     -    0s
H    0     0                       9.0000000    9.43695  4.85%     -    0s

Cutting planes:
  Clique: 13
  Zero half: 2

Explored 0 nodes (186 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%