Optimal solution to COVRP instance P-23-8:
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Route = 1 3 18, Demand = 40, RLen = 43.151692
Route = 2 9, Demand = 38, RLen = 35.788619
Route = 5 17, Demand = 37, RLen = 32.086793
Route = 6 14, Demand = 38, RLen = 33.301886
Route = 10 12 15 11, Demand = 40, RLen = 47.232959
Route = 13 8 19, Demand = 40, RLen = 51.700279
Route = 20 7 22, Demand = 40, RLen = 30.687787
Route = 21 16 4, Demand = 40, RLen = 28.919862
Sum of route lengths = 302.869877
CAP = 40
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