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

Optimize a model with 171 rows, 61 columns and 342 nonzeros
Presolve removed 55 rows and 5 columns
Presolve time: 0.00s
Presolved: 116 rows, 56 columns, 252 nonzeros
Variable types: 0 continuous, 56 integer (56 binary)
Found heuristic solution: objective 22.0000000

Root relaxation: objective 2.600000e+01, 69 iterations, 0.00 seconds

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

     0     0   26.00000    0   46   22.00000   26.00000  18.2%     -    0s
     0     0   25.37500    0   51   22.00000   25.37500  15.3%     -    0s
     0     0   25.00000    0   34   22.00000   25.00000  13.6%     -    0s
H    0     0                      23.0000000   25.00000  8.70%     -    0s
     0     0   24.84615    0   53   23.00000   24.84615  8.03%     -    0s
     0     0   24.52941    0   54   23.00000   24.52941  6.65%     -    0s
     0     0   24.38462    0   54   23.00000   24.38462  6.02%     -    0s
     0     0   24.33333    0   52   23.00000   24.33333  5.80%     -    0s
H    0     0                      24.0000000   24.33333  1.39%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 19

Explored 0 nodes (217 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%