(DEFINE (PROBLEM ART-MD-NS-DOMAIN20) (:DOMAIN ART-MD-NS-DOMAIN) (:init (P-8) (P-2) (P-4) (P-7) (P-6) (P-1) (P-5) (P-3)) (:GOAL (AND (G-6) (G-1) (G-2) (G-3))) (:length (:serial 4) (:parallel 4)))