Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:01 2012

Optimize a model with 1711 rows, 84 columns and 3422 nonzeros
Presolve removed 1218 rows and 0 columns
Presolve time: 0.04s
Presolved: 493 rows, 84 columns, 3093 nonzeros
Variable types: 0 continuous, 84 integer (84 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.286389e+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   12.86389    0   78    6.00000   12.86389   114%     -    0s
H    0     0                       7.0000000   12.86389  83.8%     -    0s
     0     0   12.66356    0   82    7.00000   12.66356  80.9%     -    0s
H    0     0                       8.0000000   12.66356  58.3%     -    0s
     0     0   12.58488    0   84    8.00000   12.58488  57.3%     -    0s
     0     0   12.56235    0   82    8.00000   12.56235  57.0%     -    0s
     0     0   12.54983    0   82    8.00000   12.54983  56.9%     -    0s
     0     0   12.53984    0   83    8.00000   12.53984  56.7%     -    0s
     0     0   12.52747    0   81    8.00000   12.52747  56.6%     -    0s
     0     0   12.52427    0   82    8.00000   12.52427  56.6%     -    0s
     0     0   12.52194    0   82    8.00000   12.52194  56.5%     -    0s
     0     0   12.51678    0   83    8.00000   12.51678  56.5%     -    0s
     0     0   12.51634    0   83    8.00000   12.51634  56.5%     -    0s
     0     0   12.51624    0   83    8.00000   12.51624  56.5%     -    0s
     0     2   12.51415    0   83    8.00000   12.51415  56.4%     -    0s
*   38    20               5       9.0000000   12.34575  37.2%  52.4    0s

Cutting planes:
  Clique: 36
  Zero half: 7

Explored 74 nodes (4855 simplex iterations) in 0.78 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%