Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:37 2012

Optimize a model with 93 rows, 42 columns and 186 nonzeros
Presolve removed 37 rows and 9 columns
Presolve time: 0.00s
Presolved: 56 rows, 33 columns, 121 nonzeros
Variable types: 0 continuous, 33 integer (33 binary)
Found heuristic solution: objective 16.0000000

Root relaxation: objective 1.900000e+01, 46 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   28   16.00000   19.00000  18.8%     -    0s
H    0     0                      17.0000000   19.00000  11.8%     -    0s
     0     0   18.00000    0   33   17.00000   18.00000  5.88%     -    0s
*    0     0               0      18.0000000   18.00000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 3

Explored 0 nodes (116 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%