Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:22 2012

Optimize a model with 779 rows, 55 columns and 1558 nonzeros
Presolve removed 555 rows and 0 columns
Presolve time: 0.01s
Presolved: 224 rows, 55 columns, 1364 nonzeros
Variable types: 0 continuous, 55 integer (55 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.160289e+00, 122 iterations, 0.00 seconds

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

     0     0    9.16029    0   50    6.00000    9.16029  52.7%     -    0s
     0     0    8.97965    0   49    6.00000    8.97965  49.7%     -    0s
H    0     0                       7.0000000    8.97965  28.3%     -    0s
     0     0    8.77571    0   53    7.00000    8.77571  25.4%     -    0s
     0     0    8.73458    0   53    7.00000    8.73458  24.8%     -    0s
     0     0    8.70153    0   54    7.00000    8.70153  24.3%     -    0s
     0     0    8.68407    0   55    7.00000    8.68407  24.1%     -    0s
     0     0    8.67978    0   55    7.00000    8.67978  24.0%     -    0s
     0     2    8.67966    0   55    7.00000    8.67966  24.0%     -    0s
*    5     1               3       8.0000000    8.67952  8.49%  24.6    0s

Cutting planes:
  Clique: 19
  Zero half: 9

Explored 6 nodes (463 simplex iterations) in 0.09 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%