Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:20 2012

Optimize a model with 1448 rows, 77 columns and 2896 nonzeros
Presolve removed 1016 rows and 0 columns
Presolve time: 0.03s
Presolved: 432 rows, 77 columns, 2659 nonzeros
Variable types: 0 continuous, 77 integer (77 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.207411e+01, 280 iterations, 0.01 seconds

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

     0     0   12.07411    0   71    7.00000   12.07411  72.5%     -    0s
     0     0   11.80848    0   74    7.00000   11.80848  68.7%     -    0s
H    0     0                       8.0000000   11.80848  47.6%     -    0s
     0     0   11.76155    0   74    8.00000   11.76155  47.0%     -    0s
     0     0   11.73561    0   76    8.00000   11.73561  46.7%     -    0s
     0     0   11.72194    0   75    8.00000   11.72194  46.5%     -    0s
     0     0   11.72188    0   75    8.00000   11.72188  46.5%     -    0s
     0     0   11.72157    0   75    8.00000   11.72157  46.5%     -    0s
     0     0   11.72157    0   75    8.00000   11.72157  46.5%     -    0s
     0     2   11.72157    0   75    8.00000   11.72157  46.5%     -    0s
*   28    15               5       9.0000000   11.58115  28.7%  50.2    0s

Cutting planes:
  Clique: 46
  Zero half: 5

Explored 51 nodes (2581 simplex iterations) in 0.37 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%