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

Optimize a model with 109 rows, 44 columns and 218 nonzeros
Presolve removed 39 rows and 5 columns
Presolve time: 0.00s
Presolved: 70 rows, 39 columns, 155 nonzeros
Variable types: 0 continuous, 39 integer (39 binary)
Found heuristic solution: objective 15.0000000

Root relaxation: objective 1.850000e+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   18.50000    0   17   15.00000   18.50000  23.3%     -    0s
H    0     0                      16.0000000   18.50000  15.6%     -    0s
H    0     0                      17.0000000   18.50000  8.82%     -    0s
H    0     0                      18.0000000   18.50000  2.78%     -    0s

Explored 0 nodes (68 simplex iterations) in 0.00 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%