Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:56 2012

Optimize a model with 1711 rows, 83 columns and 3422 nonzeros
Presolve removed 1208 rows and 0 columns
Presolve time: 0.04s
Presolved: 503 rows, 83 columns, 3257 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.253558e+01, 309 iterations, 0.01 seconds

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

     0     0   12.53558    0   78    6.00000   12.53558   109%     -    0s
H    0     0                       7.0000000   12.53558  79.1%     -    0s
     0     0   12.12580    0   80    7.00000   12.12580  73.2%     -    0s
     0     0   12.03799    0   80    7.00000   12.03799  72.0%     -    0s
H    0     0                       8.0000000   12.03799  50.5%     -    0s
     0     0   11.92397    0   81    8.00000   11.92397  49.0%     -    0s
     0     0   11.90482    0   81    8.00000   11.90482  48.8%     -    0s
     0     0   11.90160    0   80    8.00000   11.90160  48.8%     -    0s
     0     0   11.89870    0   81    8.00000   11.89870  48.7%     -    0s
H    0     0                       9.0000000   11.89870  32.2%     -    0s
     0     2   11.89707    0   81    9.00000   11.89707  32.2%     -    0s

Cutting planes:
  Clique: 50
  Zero half: 3

Explored 36 nodes (2830 simplex iterations) in 0.50 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%