Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:38 2012

Optimize a model with 119 rows, 47 columns and 238 nonzeros
Presolve removed 31 rows and 4 columns
Presolve time: 0.00s
Presolved: 88 rows, 43 columns, 188 nonzeros
Variable types: 0 continuous, 43 integer (43 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 2.150000e+01, 59 iterations, 0.00 seconds

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

     0     0   21.50000    0   43   18.00000   21.50000  19.4%     -    0s
H    0     0                      19.0000000   21.50000  13.2%     -    0s
     0     0   21.00000    0   34   19.00000   21.00000  10.5%     -    0s
H    0     0                      20.0000000   21.00000  5.00%     -    0s
     0     0     cutoff    0        20.00000   20.99998  5.00%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 12

Explored 0 nodes (93 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%