(GOAL COMPLEXITY) (STARTTERM (FUNCTIONSYMBOLS f300)) (VAR A B C) (RULES f300(A, B, C) -> Com_1(f2(A, B, C)) f2(A, B, C) -> Com_1(f2(A + B, B, C)) [ A + B >= 0 ] f2(A, B, C) -> Com_1(f1(A + B, B, D)) [ 0 >= A + B + 1 ] )