Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:23 2012

Optimize a model with 81 rows, 53 columns and 253 nonzeros
Presolve time: 0.00s
Presolved: 81 rows, 53 columns, 253 nonzeros
Variable types: 0 continuous, 53 integer (53 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 0.000000e+00, 19 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   13   21.00000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
     0     0    0.64615    0   14   19.00000    0.64615  96.6%     -    0s
H    0     0                      18.0000000    0.64615  96.4%     -    0s
     0     0    1.09231    0   15   18.00000    1.09231  93.9%     -    0s
     0     0    1.83260    0   17   18.00000    1.83260  89.8%     -    0s
     0     0    1.91758    0   18   18.00000    1.91758  89.3%     -    0s
     0     0    1.91758    0   18   18.00000    1.91758  89.3%     -    0s
     0     0    1.91758    0   18   18.00000    1.91758  89.3%     -    0s
H    0     0                      17.0000000    1.91758  88.7%     -    0s
     0     2    2.01905    0   18   17.00000    2.01905  88.1%     -    0s
*   12    10               8      16.0000000    4.89286  69.4%  12.9    0s
*   38    15               8      15.0000000    8.26667  44.9%   9.8    0s

Cutting planes:
  Gomory: 5
  Mod-K: 2

Explored 77 nodes (730 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%