Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012

Optimize a model with 202 rows, 60 columns and 404 nonzeros
Presolve removed 52 rows and 0 columns
Presolve time: 0.00s
Presolved: 150 rows, 60 columns, 340 nonzeros
Variable types: 0 continuous, 60 integer (60 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 2.500000e+01, 70 iterations, 0.00 seconds

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

     0     0   25.00000    0   46   20.00000   25.00000  25.0%     -    0s
H    0     0                      21.0000000   25.00000  19.0%     -    0s
     0     0   24.22222    0   55   21.00000   24.22222  15.3%     -    0s
     0     0   23.73529    0   57   21.00000   23.73529  13.0%     -    0s
     0     0   23.25000    0   56   21.00000   23.25000  10.7%     -    0s
H    0     0                      22.0000000   23.25000  5.68%     -    0s
     0     0   23.19091    0   57   22.00000   23.19091  5.41%     -    0s
     0     0   23.06667    0   56   22.00000   23.06667  4.85%     -    0s
     0     0   23.01724    0   54   22.00000   23.01724  4.62%     -    0s
     0     0     cutoff    0        22.00000   22.99998  4.55%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 31

Explored 0 nodes (313 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%