Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:31 2012

Optimize a model with 1852 rows, 87 columns and 3704 nonzeros
Presolve removed 1286 rows and 0 columns
Presolve time: 0.05s
Presolved: 566 rows, 87 columns, 3654 nonzeros
Variable types: 0 continuous, 87 integer (87 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.301273e+01, 334 iterations, 0.01 seconds

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

     0     0   13.01273    0   80    6.00000   13.01273   117%     -    0s
H    0     0                       7.0000000   13.01273  85.9%     -    0s
     0     0   12.64794    0   86    7.00000   12.64794  80.7%     -    0s
     0     0   12.54745    0   86    7.00000   12.54745  79.2%     -    0s
H    0     0                       8.0000000   12.54745  56.8%     -    0s
     0     0   12.51413    0   86    8.00000   12.51413  56.4%     -    0s
     0     0   12.50458    0   86    8.00000   12.50458  56.3%     -    0s
     0     0   12.50404    0   86    8.00000   12.50404  56.3%     -    0s
     0     0   12.49878    0   86    8.00000   12.49878  56.2%     -    0s
     0     0   12.49724    0   86    8.00000   12.49724  56.2%     -    0s
     0     0   12.48157    0   86    8.00000   12.48157  56.0%     -    0s
     0     0   12.46475    0   86    8.00000   12.46475  55.8%     -    0s
     0     0   12.46405    0   86    8.00000   12.46405  55.8%     -    0s
     0     0   12.46390    0   86    8.00000   12.46390  55.8%     -    0s
     0     2   12.46077    0   86    8.00000   12.46077  55.8%     -    0s

Cutting planes:
  Clique: 57
  Zero half: 4

Explored 161 nodes (8540 simplex iterations) in 1.11 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%