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

Optimize a model with 131 rows, 52 columns and 262 nonzeros
Presolve removed 32 rows and 4 columns
Presolve time: 0.00s
Presolved: 99 rows, 48 columns, 210 nonzeros
Variable types: 0 continuous, 48 integer (48 binary)
Found heuristic solution: objective 19.0000000

Root relaxation: objective 2.300000e+01, 72 iterations, 0.00 seconds

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

     0     0   23.00000    0   34   19.00000   23.00000  21.1%     -    0s
H    0     0                      20.0000000   23.00000  15.0%     -    0s
     0     0   22.66667    0   47   20.00000   22.66667  13.3%     -    0s
H    0     0                      21.0000000   22.66667  7.94%     -    0s
H    0     0                      22.0000000   22.66667  3.03%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 4

Explored 0 nodes (110 simplex iterations) in 0.01 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%