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

Optimize a model with 136 rows, 47 columns and 272 nonzeros
Presolve removed 32 rows and 0 columns
Presolve time: 0.00s
Presolved: 104 rows, 47 columns, 233 nonzeros
Variable types: 0 continuous, 47 integer (47 binary)
Found heuristic solution: objective 16.0000000

Root relaxation: objective 1.900000e+01, 71 iterations, 0.00 seconds

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

     0     0   19.00000    0   41   16.00000   19.00000  18.8%     -    0s
H    0     0                      17.0000000   19.00000  11.8%     -    0s
     0     0   18.57447    0   45   17.00000   18.57447  9.26%     -    0s
     0     0   18.00000    0   38   17.00000   18.00000  5.88%     -    0s
     0     0   18.00000    0   35   17.00000   18.00000  5.88%     -    0s
     0     0     cutoff    0        17.00000   17.99998  5.88%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 1
  Zero half: 39

Explored 0 nodes (168 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%