Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:10 2012

Optimize a model with 91 rows, 71 columns and 296 nonzeros
Presolve time: 0.00s
Presolved: 91 rows, 71 columns, 296 nonzeros
Variable types: 0 continuous, 71 integer (71 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 0.000000e+00, 41 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   25   21.00000    0.00000   100%     -    0s
H    0     0                      16.0000000    0.00000   100%     -    0s
     0     0    0.52843    0   29   16.00000    0.52843  96.7%     -    0s
H    0     0                      14.0000000    0.52843  96.2%     -    0s
     0     0    0.56057    0   29   14.00000    0.56057  96.0%     -    0s
     0     0    0.56057    0   30   14.00000    0.56057  96.0%     -    0s
     0     0    0.56057    0   30   14.00000    0.56057  96.0%     -    0s
H    0     0                      12.0000000    0.56057  95.3%     -    0s
H    0     0                      11.0000000    0.56057  94.9%     -    0s
     0     2    0.56849    0   30   11.00000    0.56849  94.8%     -    0s
*   15    11               8       9.0000000    3.00000  66.7%  15.4    0s
*   29     9               6       8.0000000    3.42857  57.1%  12.4    0s

Cutting planes:
  Gomory: 1
  Zero half: 2
  Mod-K: 2

Explored 43 nodes (581 simplex iterations) in 0.03 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%