YES Problem: cond(true(),x) -> cond(odd(x),p(x)) odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) p(0()) -> 0() p(s(x)) -> x Proof: DP Processor: DPs: cond#(true(),x) -> p#(x) cond#(true(),x) -> odd#(x) cond#(true(),x) -> cond#(odd(x),p(x)) odd#(s(s(x))) -> odd#(x) TRS: cond(true(),x) -> cond(odd(x),p(x)) odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) p(0()) -> 0() p(s(x)) -> x TDG Processor: DPs: cond#(true(),x) -> p#(x) cond#(true(),x) -> odd#(x) cond#(true(),x) -> cond#(odd(x),p(x)) odd#(s(s(x))) -> odd#(x) TRS: cond(true(),x) -> cond(odd(x),p(x)) odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) p(0()) -> 0() p(s(x)) -> x graph: odd#(s(s(x))) -> odd#(x) -> odd#(s(s(x))) -> odd#(x) cond#(true(),x) -> odd#(x) -> odd#(s(s(x))) -> odd#(x) cond#(true(),x) -> cond#(odd(x),p(x)) -> cond#(true(),x) -> cond#(odd(x),p(x)) cond#(true(),x) -> cond#(odd(x),p(x)) -> cond#(true(),x) -> odd#(x) cond#(true(),x) -> cond#(odd(x),p(x)) -> cond#(true(),x) -> p#(x) SCC Processor: #sccs: 2 #rules: 2 #arcs: 5/16 DPs: cond#(true(),x) -> cond#(odd(x),p(x)) TRS: cond(true(),x) -> cond(odd(x),p(x)) odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) p(0()) -> 0() p(s(x)) -> x Usable Rule Processor: DPs: cond#(true(),x) -> cond#(odd(x),p(x)) TRS: p(0()) -> 0() p(s(x)) -> x odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) Arctic Interpretation Processor: dimension: 1 usable rules: p(0()) -> 0() p(s(x)) -> x odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) interpretation: [cond#](x0, x1) = x0 + 1x1 + 0, [s](x0) = 2x0 + 0, [false] = 2, [0] = 3, [p](x0) = -1x0 + 3, [odd](x0) = x0 + 0, [true] = 5 orientation: cond#(true(),x) = 1x + 5 >= x + 4 = cond#(odd(x),p(x)) p(0()) = 3 >= 3 = 0() p(s(x)) = 1x + 3 >= x = x odd(0()) = 3 >= 2 = false() odd(s(0())) = 5 >= 5 = true() odd(s(s(x))) = 4x + 2 >= x + 0 = odd(x) problem: DPs: TRS: p(0()) -> 0() p(s(x)) -> x odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) Qed DPs: odd#(s(s(x))) -> odd#(x) TRS: cond(true(),x) -> cond(odd(x),p(x)) odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) p(0()) -> 0() p(s(x)) -> x Subterm Criterion Processor: simple projection: pi(odd#) = 0 problem: DPs: TRS: cond(true(),x) -> cond(odd(x),p(x)) odd(0()) -> false() odd(s(0())) -> true() odd(s(s(x))) -> odd(x) p(0()) -> 0() p(s(x)) -> x Qed