Optimal solution to COVRP instance E-33-4:
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Route = 3 2 12 11 13 18 19 21 20 22 24 23, Demand = 700, RLen = 152.525811
Route = 4 5 6 7 32 8 9 10, Demand = 667, RLen = 105.086789
Route = 30 29 28 26, Demand = 800, RLen = 113.916961
Route = 31 1 14 15 17 25 27 16, Demand = 770, RLen = 139.733853
Sum of route lengths = 511.263413
CAP = 800
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