Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012

Optimize a model with 217 rows, 63 columns and 434 nonzeros
Presolve removed 78 rows and 0 columns
Presolve time: 0.00s
Presolved: 139 rows, 63 columns, 334 nonzeros
Variable types: 0 continuous, 63 integer (63 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 2.383333e+01, 83 iterations, 0.00 seconds

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

     0     0   23.83333    0   57   21.00000   23.83333  13.5%     -    0s
H    0     0                      22.0000000   23.83333  8.33%     -    0s
     0     0   23.50000    0   47   22.00000   23.50000  6.82%     -    0s
     0     0   23.40000    0   54   22.00000   23.40000  6.36%     -    0s
     0     0   23.25000    0   54   22.00000   23.25000  5.68%     -    0s
H    0     0                      23.0000000   23.25000  1.09%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 1
  Zero half: 11

Explored 0 nodes (176 simplex iterations) in 0.01 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%