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