Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:15 2012

Optimize a model with 55 rows, 38 columns and 173 nonzeros
Presolve time: 0.00s
Presolved: 55 rows, 38 columns, 173 nonzeros
Variable types: 0 continuous, 38 integer (38 binary)
Found heuristic solution: objective 15.0000000
Found heuristic solution: objective 11.0000000

Root relaxation: objective 0.000000e+00, 17 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   11   11.00000    0.00000   100%     -    0s
     0     0    0.75000    0   13   11.00000    0.75000  93.2%     -    0s
     0     0    0.88636    0   14   11.00000    0.88636  91.9%     -    0s
H    0     0                      10.0000000    0.88636  91.1%     -    0s
     0     0    0.94186    0   18   10.00000    0.94186  90.6%     -    0s
H    0     0                       9.0000000    0.94186  89.5%     -    0s
     0     0    1.00000    0   17    9.00000    1.00000  88.9%     -    0s
     0     0    1.08178    0   23    9.00000    1.08178  88.0%     -    0s
     0     0    1.10000    0   17    9.00000    1.10000  87.8%     -    0s
     0     0    1.20819    0   26    9.00000    1.20819  86.6%     -    0s
     0     0    1.23409    0   19    9.00000    1.23409  86.3%     -    0s
     0     0    1.26499    0   31    9.00000    1.26499  85.9%     -    0s
     0     0    1.31863    0   18    9.00000    1.31863  85.3%     -    0s
     0     0    1.32939    0   20    9.00000    1.32939  85.2%     -    0s
     0     0    1.32939    0   20    9.00000    1.32939  85.2%     -    0s
     0     2    1.35329    0   20    9.00000    1.35329  85.0%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 5
  Mod-K: 4

Explored 15 nodes (290 simplex iterations) in 0.01 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%