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

Optimize a model with 206 rows, 63 columns and 412 nonzeros
Presolve removed 63 rows and 3 columns
Presolve time: 0.00s
Presolved: 143 rows, 60 columns, 321 nonzeros
Variable types: 0 continuous, 60 integer (60 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.575000e+01, 86 iterations, 0.00 seconds

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

     0     0   25.75000    0   49   20.00000   25.75000  28.7%     -    0s
H    0     0                      21.0000000   25.75000  22.6%     -    0s
     0     0   25.15789    0   58   21.00000   25.15789  19.8%     -    0s
H    0     0                      22.0000000   25.15789  14.4%     -    0s
     0     0   24.58333    0   54   22.00000   24.58333  11.7%     -    0s
     0     0   24.51667    0   60   22.00000   24.51667  11.4%     -    0s
     0     0   24.32394    0   58   22.00000   24.32394  10.6%     -    0s
     0     0   24.26087    0   55   22.00000   24.26087  10.3%     -    0s
     0     0   24.18519    0   59   22.00000   24.18519  9.93%     -    0s
     0     0   24.14286    0   57   22.00000   24.14286  9.74%     -    0s
     0     0   24.14286    0   55   22.00000   24.14286  9.74%     -    0s
H    0     0                      23.0000000   24.14286  4.97%     -    0s
     0     0   24.00000    0   32   23.00000   24.00000  4.35%     -    0s
     0     0     cutoff    0        23.00000   23.99998  4.35%     -    0s

Cutting planes:
  Zero half: 31

Explored 0 nodes (281 simplex iterations) in 0.02 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%