Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:29 2012

Optimize a model with 1868 rows, 87 columns and 3736 nonzeros
Presolve removed 1311 rows and 0 columns
Presolve time: 0.05s
Presolved: 557 rows, 87 columns, 3561 nonzeros
Variable types: 0 continuous, 87 integer (87 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.282460e+01, 315 iterations, 0.01 seconds

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

     0     0   12.82460    0   81    7.00000   12.82460  83.2%     -    0s
     0     0   12.49855    0   85    7.00000   12.49855  78.6%     -    0s
H    0     0                       8.0000000   12.49855  56.2%     -    0s
     0     0   12.44929    0   85    8.00000   12.44929  55.6%     -    0s
     0     0   12.43968    0   86    8.00000   12.43968  55.5%     -    0s
     0     0   12.43788    0   86    8.00000   12.43788  55.5%     -    0s
     0     0   12.43768    0   86    8.00000   12.43768  55.5%     -    0s
     0     0   12.43259    0   86    8.00000   12.43259  55.4%     -    0s
     0     0   12.42467    0   85    8.00000   12.42467  55.3%     -    0s
     0     0   12.41993    0   85    8.00000   12.41993  55.2%     -    0s
     0     0   12.41855    0   85    8.00000   12.41855  55.2%     -    0s
     0     0   12.41840    0   85    8.00000   12.41840  55.2%     -    0s
     0     2   12.41603    0   85    8.00000   12.41603  55.2%     -    0s
*   67    24               7       9.0000000   11.76749  30.7%  54.0    0s

Cutting planes:
  Clique: 37
  Zero half: 5

Explored 94 nodes (5250 simplex iterations) in 0.90 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%