Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:38 2012

Optimize a model with 134 rows, 50 columns and 268 nonzeros
Presolve removed 48 rows and 8 columns
Presolve time: 0.00s
Presolved: 86 rows, 42 columns, 184 nonzeros
Variable types: 0 continuous, 42 integer (42 binary)
Found heuristic solution: objective 19.0000000

Root relaxation: objective 2.150000e+01, 62 iterations, 0.00 seconds

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

     0     0   21.50000    0   33   19.00000   21.50000  13.2%     -    0s
     0     0   20.88889    0   39   19.00000   20.88889  9.94%     -    0s
H    0     0                      20.0000000   20.88889  4.44%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 4

Explored 0 nodes (99 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%