We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict Trs: { f(g(x), s(0()), y) -> f(y, y, g(x)) , g(s(x)) -> s(g(x)) , g(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We add the following weak dependency pairs: Strict DPs: { f^#(g(x), s(0()), y) -> c_1(f^#(y, y, g(x))) , g^#(s(x)) -> c_2(g^#(x)) , g^#(0()) -> c_3() } and mark the set of starting terms. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { f^#(g(x), s(0()), y) -> c_1(f^#(y, y, g(x))) , g^#(s(x)) -> c_2(g^#(x)) , g^#(0()) -> c_3() } Strict Trs: { f(g(x), s(0()), y) -> f(y, y, g(x)) , g(s(x)) -> s(g(x)) , g(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We replace rewrite rules by usable rules: Strict Usable Rules: { g(s(x)) -> s(g(x)) , g(0()) -> 0() } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { f^#(g(x), s(0()), y) -> c_1(f^#(y, y, g(x))) , g^#(s(x)) -> c_2(g^#(x)) , g^#(0()) -> c_3() } Strict Trs: { g(s(x)) -> s(g(x)) , g(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) The weightgap principle applies (using the following constant growth matrix-interpretation) The following argument positions are usable: Uargs(s) = {1}, Uargs(c_2) = {1} TcT has computed the following constructor-restricted matrix interpretation. [g](x1) = [0 1] x1 + [0] [0 1] [0] [s](x1) = [1 0] x1 + [0] [0 1] [1] [0] = [0] [1] [f^#](x1, x2, x3) = [0] [0] [c_1](x1) = [0] [0] [g^#](x1) = [0] [0] [c_2](x1) = [1 0] x1 + [0] [0 1] [0] [c_3] = [0] [0] The order satisfies the following ordering constraints: [g(s(x))] = [0 1] x + [1] [0 1] [1] > [0 1] x + [0] [0 1] [1] = [s(g(x))] [g(0())] = [1] [1] > [0] [1] = [0()] [f^#(g(x), s(0()), y)] = [0] [0] >= [0] [0] = [c_1(f^#(y, y, g(x)))] [g^#(s(x))] = [0] [0] >= [0] [0] = [c_2(g^#(x))] [g^#(0())] = [0] [0] >= [0] [0] = [c_3()] Further, it can be verified that all rules not oriented are covered by the weightgap condition. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { f^#(g(x), s(0()), y) -> c_1(f^#(y, y, g(x))) , g^#(s(x)) -> c_2(g^#(x)) , g^#(0()) -> c_3() } Weak Trs: { g(s(x)) -> s(g(x)) , g(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) Consider the dependency graph: 1: f^#(g(x), s(0()), y) -> c_1(f^#(y, y, g(x))) 2: g^#(s(x)) -> c_2(g^#(x)) -->_1 g^#(0()) -> c_3() :3 -->_1 g^#(s(x)) -> c_2(g^#(x)) :2 3: g^#(0()) -> c_3() Only the nodes {2,3} are reachable from nodes {2,3} that start derivation from marked basic terms. The nodes not reachable are removed from the problem. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { g^#(s(x)) -> c_2(g^#(x)) , g^#(0()) -> c_3() } Weak Trs: { g(s(x)) -> s(g(x)) , g(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We estimate the number of application of {2} by applications of Pre({2}) = {1}. Here rules are labeled as follows: DPs: { 1: g^#(s(x)) -> c_2(g^#(x)) , 2: g^#(0()) -> c_3() } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { g^#(s(x)) -> c_2(g^#(x)) } Weak DPs: { g^#(0()) -> c_3() } Weak Trs: { g(s(x)) -> s(g(x)) , g(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed. { g^#(0()) -> c_3() } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { g^#(s(x)) -> c_2(g^#(x)) } Weak Trs: { g(s(x)) -> s(g(x)) , g(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) No rule is usable, rules are removed from the input problem. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { g^#(s(x)) -> c_2(g^#(x)) } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We use the processor 'Small Polynomial Path Order (PS,1-bounded)' to orient following rules strictly. DPs: { 1: g^#(s(x)) -> c_2(g^#(x)) } Sub-proof: ---------- The input was oriented with the instance of 'Small Polynomial Path Order (PS,1-bounded)' as induced by the safe mapping safe(s) = {1}, safe(g^#) = {}, safe(c_2) = {} and precedence empty . Following symbols are considered recursive: {g^#} The recursion depth is 1. Further, following argument filtering is employed: pi(s) = [1], pi(g^#) = [1], pi(c_2) = [1] Usable defined function symbols are a subset of: {g^#} For your convenience, here are the satisfied ordering constraints: pi(g^#(s(x))) = g^#(s(; x);) > c_2(g^#(x;);) = pi(c_2(g^#(x))) The strictly oriented rules are moved into the weak component. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Weak DPs: { g^#(s(x)) -> c_2(g^#(x)) } Obligation: innermost runtime complexity Answer: YES(O(1),O(1)) The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed. { g^#(s(x)) -> c_2(g^#(x)) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Rules: Empty Obligation: innermost runtime complexity Answer: YES(O(1),O(1)) Empty rules are trivially bounded Hurray, we answered YES(O(1),O(n^1))