(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS start)) (VAR A B) (RULES start(A, B) -> Com_1(sumto(A, B)) sumto(A, B) -> Com_1(sumto(A + 1, B)) [ B >= A ] sumto(A, B) -> Com_1(end(A, B)) [ A >= B + 1 ] )