Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:18 2012

Optimize a model with 53 rows, 38 columns and 168 nonzeros
Presolve time: 0.00s
Presolved: 53 rows, 38 columns, 168 nonzeros
Variable types: 0 continuous, 38 integer (38 binary)
Found heuristic solution: objective 12.0000000

Root relaxation: objective 0.000000e+00, 16 iterations, 0.00 seconds

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

     0     0    0.00000    0   12   12.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     0    0.75000    0   13   11.00000    0.75000  93.2%     -    0s
     0     0    1.00000    0   14   11.00000    1.00000  90.9%     -    0s
     0     0    1.12500    0   14   11.00000    1.12500  89.8%     -    0s
     0     0    1.25000    0   15   11.00000    1.25000  88.6%     -    0s
     0     0    1.33333    0   16   11.00000    1.33333  87.9%     -    0s
     0     0    1.45472    0   19   11.00000    1.45472  86.8%     -    0s
     0     0    1.53140    0   21   11.00000    1.53140  86.1%     -    0s
     0     0    1.54167    0   16   11.00000    1.54167  86.0%     -    0s
     0     0    1.61194    0   19   11.00000    1.61194  85.3%     -    0s
     0     0    1.66667    0   17   11.00000    1.66667  84.8%     -    0s
     0     0    1.67936    0   30   11.00000    1.67936  84.7%     -    0s
H    0     0                      10.0000000    1.67936  83.2%     -    0s
     0     2    1.78522    0   30   10.00000    1.78522  82.1%     -    0s
*   19     3               4       9.0000000    4.50000  50.0%   7.1    0s

Cutting planes:
  Gomory: 3
  Mod-K: 5

Explored 31 nodes (305 simplex iterations) in 0.02 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%