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

Optimize a model with 117 rows, 48 columns and 234 nonzeros
Presolve removed 36 rows and 4 columns
Presolve time: 0.00s
Presolved: 81 rows, 44 columns, 172 nonzeros
Variable types: 0 continuous, 44 integer (44 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 2.200000e+01, 50 iterations, 0.00 seconds

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

     0     0   22.00000    0   40   18.00000   22.00000  22.2%     -    0s
H    0     0                      20.0000000   22.00000  10.0%     -    0s
*    0     0               0      21.0000000   21.00000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 20

Explored 0 nodes (101 simplex iterations) in 0.00 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%