Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:41 2012

Optimize a model with 1589 rows, 81 columns and 3178 nonzeros
Presolve removed 1130 rows and 0 columns
Presolve time: 0.04s
Presolved: 459 rows, 81 columns, 2860 nonzeros
Variable types: 0 continuous, 81 integer (81 binary)
Found heuristic solution: objective 8.0000000

Root relaxation: objective 1.256526e+01, 241 iterations, 0.01 seconds

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

     0     0   12.56526    0   79    8.00000   12.56526  57.1%     -    0s
     0     0   12.31389    0   78    8.00000   12.31389  53.9%     -    0s
H    0     0                       9.0000000   12.31389  36.8%     -    0s
     0     0   12.24634    0   77    9.00000   12.24634  36.1%     -    0s
     0     0   12.17449    0   79    9.00000   12.17449  35.3%     -    0s
     0     0   12.15696    0   81    9.00000   12.15696  35.1%     -    0s
     0     0   12.14911    0   79    9.00000   12.14911  35.0%     -    0s
     0     0   12.14559    0   80    9.00000   12.14559  35.0%     -    0s
     0     0   12.13841    0   80    9.00000   12.13841  34.9%     -    0s
     0     0   12.10985    0   81    9.00000   12.10985  34.6%     -    0s
     0     0   12.10597    0   81    9.00000   12.10597  34.5%     -    0s
     0     0   12.10594    0   81    9.00000   12.10594  34.5%     -    0s
     0     2   12.10561    0   81    9.00000   12.10561  34.5%     -    0s

Cutting planes:
  Clique: 38
  Zero half: 4

Explored 37 nodes (2558 simplex iterations) in 0.56 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%