Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:40 2012

Optimize a model with 89 rows, 75 columns and 295 nonzeros
Presolve time: 0.00s
Presolved: 89 rows, 75 columns, 295 nonzeros
Variable types: 0 continuous, 75 integer (75 binary)
Found heuristic solution: objective 16.0000000

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   30   16.00000    0.00000   100%     -    0s
H    0     0                      15.0000000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
     0     0    0.40698    0   32   13.00000    0.40698  96.9%     -    0s
     0     0    1.03570    0   33   13.00000    1.03570  92.0%     -    0s
     0     0    1.35778    0   32   13.00000    1.35778  89.6%     -    0s
     0     0    1.36285    0   34   13.00000    1.36285  89.5%     -    0s
H    0     0                      12.0000000    1.36285  88.6%     -    0s
     0     2    1.36719    0   34   12.00000    1.36719  88.6%     -    0s
*   10     9               7       9.0000000    3.79202  57.9%  15.3    0s
*   13     3               6       6.0000000    3.79202  36.8%  13.1    0s

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

Explored 20 nodes (391 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%