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

Optimize a model with 162 rows, 54 columns and 324 nonzeros
Presolve removed 55 rows and 0 columns
Presolve time: 0.00s
Presolved: 107 rows, 54 columns, 254 nonzeros
Variable types: 0 continuous, 54 integer (54 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 2.250000e+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   22.50000    0   46   21.00000   22.50000  7.14%     -    0s
     0     0     cutoff    0        21.00000   21.99998  4.76%     -    0s

Cutting planes:
  Clique: 2
  Mod-K: 8

Explored 0 nodes (87 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%