Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:38 2012

Optimize a model with 115 rows, 47 columns and 230 nonzeros
Presolve removed 21 rows and 0 columns
Presolve time: 0.00s
Presolved: 94 rows, 47 columns, 200 nonzeros
Variable types: 0 continuous, 47 integer (47 binary)
Found heuristic solution: objective 17.0000000

Root relaxation: objective 2.100000e+01, 62 iterations, 0.00 seconds

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

     0     0   21.00000    0   38   17.00000   21.00000  23.5%     -    0s
H    0     0                      19.0000000   21.00000  10.5%     -    0s
     0     0   20.12500    0   45   19.00000   20.12500  5.92%     -    0s
H    0     0                      20.0000000   20.12500  0.62%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 6

Explored 0 nodes (102 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%