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

Optimize a model with 117 rows, 52 columns and 234 nonzeros
Presolve removed 34 rows and 8 columns
Presolve time: 0.00s
Presolved: 83 rows, 44 columns, 173 nonzeros
Variable types: 0 continuous, 44 integer (44 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 2.425000e+01, 57 iterations, 0.00 seconds

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

     0     0   24.25000    0   39   21.00000   24.25000  15.5%     -    0s
H    0     0                      22.0000000   24.25000  10.2%     -    0s
     0     0   23.61538    0   40   22.00000   23.61538  7.34%     -    0s
H    0     0                      23.0000000   23.61538  2.68%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 3

Explored 0 nodes (86 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%