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

Optimize a model with 182 rows, 57 columns and 364 nonzeros
Presolve removed 46 rows and 2 columns
Presolve time: 0.00s
Presolved: 136 rows, 55 columns, 302 nonzeros
Variable types: 0 continuous, 55 integer (55 binary)
Found heuristic solution: objective 19.0000000

Root relaxation: objective 2.400000e+01, 61 iterations, 0.00 seconds

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

     0     0   24.00000    0   40   19.00000   24.00000  26.3%     -    0s
H    0     0                      20.0000000   24.00000  20.0%     -    0s
     0     0   23.00000    0   34   20.00000   23.00000  15.0%     -    0s
     0     0   22.86364    0   51   20.00000   22.86364  14.3%     -    0s
     0     0   22.28571    0   43   20.00000   22.28571  11.4%     -    0s
     0     0   22.00000    0   50   20.00000   22.00000  10.0%     -    0s
     0     0   21.75000    0   46   20.00000   21.75000  8.75%     -    0s
     0     0   21.75000    0   47   20.00000   21.75000  8.75%     -    0s
     0     0   21.75000    0   38   20.00000   21.75000  8.75%     -    0s
H    0     0                      21.0000000   21.75000  3.57%     -    0s

Cutting planes:
  Zero half: 15

Explored 0 nodes (296 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%