Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:48 2012

Optimize a model with 1667 rows, 82 columns and 3334 nonzeros
Presolve removed 1158 rows and 0 columns
Presolve time: 0.05s
Presolved: 509 rows, 82 columns, 3218 nonzeros
Variable types: 0 continuous, 82 integer (82 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.233769e+01, 266 iterations, 0.01 seconds

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

     0     0   12.33769    0   75    6.00000   12.33769   106%     -    0s
H    0     0                       7.0000000   12.33769  76.3%     -    0s
     0     0   12.11506    0   79    7.00000   12.11506  73.1%     -    0s
H    0     0                       8.0000000   12.11506  51.4%     -    0s
     0     0   12.02300    0   81    8.00000   12.02300  50.3%     -    0s
     0     0   12.00608    0   80    8.00000   12.00608  50.1%     -    0s
     0     0   11.98954    0   81    8.00000   11.98954  49.9%     -    0s
     0     0   11.98581    0   82    8.00000   11.98581  49.8%     -    0s
     0     0   11.98103    0   82    8.00000   11.98103  49.8%     -    0s
     0     0   11.97769    0   81    8.00000   11.97769  49.7%     -    0s
     0     0   11.97708    0   81    8.00000   11.97708  49.7%     -    0s
     0     0   11.97559    0   81    8.00000   11.97559  49.7%     -    0s
     0     2   11.97491    0   81    8.00000   11.97491  49.7%     -    0s

Cutting planes:
  Clique: 42
  Zero half: 4

Explored 113 nodes (5694 simplex iterations) in 0.72 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%