Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012

Optimize a model with 188 rows, 58 columns and 376 nonzeros
Presolve removed 54 rows and 1 columns
Presolve time: 0.00s
Presolved: 134 rows, 57 columns, 301 nonzeros
Variable types: 0 continuous, 57 integer (57 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.340000e+01, 76 iterations, 0.00 seconds

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

     0     0   23.40000    0   55   20.00000   23.40000  17.0%     -    0s
H    0     0                      22.0000000   23.40000  6.36%     -    0s
     0     0     cutoff    0        22.00000   22.99998  4.55%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 31

Explored 0 nodes (112 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%