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

Optimize a model with 177 rows, 59 columns and 354 nonzeros
Presolve removed 71 rows and 9 columns
Presolve time: 0.00s
Presolved: 106 rows, 50 columns, 235 nonzeros
Variable types: 0 continuous, 50 integer (50 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 2.433333e+01, 74 iterations, 0.00 seconds

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

     0     0   24.33333    0   42   21.00000   24.33333  15.9%     -    0s
H    0     0                      22.0000000   24.33333  10.6%     -    0s
     0     0   23.83333    0   45   22.00000   23.83333  8.33%     -    0s
     0     0   23.83333    0   46   22.00000   23.83333  8.33%     -    0s
     0     0   23.71429    0   45   22.00000   23.71429  7.79%     -    0s
     0     0   23.54545    0   46   22.00000   23.54545  7.02%     -    0s
     0     0   23.42857    0   43   22.00000   23.42857  6.49%     -    0s
     0     0   23.40000    0   46   22.00000   23.40000  6.36%     -    0s
     0     0   23.20000    0   44   22.00000   23.20000  5.45%     -    0s
     0     0   23.14286    0   45   22.00000   23.14286  5.19%     -    0s
     0     0     cutoff    0        22.00000   22.99998  4.55%     -    0s

Cutting planes:
  Zero half: 31

Explored 0 nodes (241 simplex iterations) in 0.02 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%