Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012

Optimize a model with 169 rows, 56 columns and 338 nonzeros
Presolve removed 57 rows and 2 columns
Presolve time: 0.00s
Presolved: 112 rows, 54 columns, 261 nonzeros
Variable types: 0 continuous, 54 integer (54 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.333333e+01, 73 iterations, 0.00 seconds

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

     0     0   23.33333    0   46   20.00000   23.33333  16.7%     -    0s
H    0     0                      22.0000000   23.33333  6.06%     -    0s
     0     0 infeasible    0        22.00000   22.99998  4.55%     -    0s

Cutting planes:
  Zero half: 23

Explored 0 nodes (96 simplex iterations) in 0.00 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%