We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict Trs: { compS_f#1(compS_f(x2), x1) -> compS_f#1(x2, S(x1)) , compS_f#1(id(), x3) -> S(x3) , iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() , main(S(x9)) -> compS_f#1(iter#3(x9), 0()) , main(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We add the following weak dependency pairs: Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , iter#3^#(0()) -> c_4() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) , main^#(0()) -> c_6() } 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: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , iter#3^#(0()) -> c_4() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) , main^#(0()) -> c_6() } Strict Trs: { compS_f#1(compS_f(x2), x1) -> compS_f#1(x2, S(x1)) , compS_f#1(id(), x3) -> S(x3) , iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() , main(S(x9)) -> compS_f#1(iter#3(x9), 0()) , main(0()) -> 0() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We replace rewrite rules by usable rules: Strict Usable Rules: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , iter#3^#(0()) -> c_4() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) , main^#(0()) -> c_6() } Strict Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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(compS_f) = {1}, Uargs(compS_f#1^#) = {1}, Uargs(c_1) = {1}, Uargs(c_3) = {1}, Uargs(c_5) = {1} TcT has computed the following constructor-restricted matrix interpretation. [compS_f](x1) = [1 0] x1 + [0] [0 0] [0] [S](x1) = [1 0] x1 + [2] [0 1] [1] [id] = [0] [0] [iter#3](x1) = [0 1] x1 + [0] [2 0] [0] [0] = [0] [1] [compS_f#1^#](x1, x2) = [1 0] x1 + [0] [0 0] [0] [c_1](x1) = [1 0] x1 + [0] [0 1] [0] [c_2] = [0] [0] [iter#3^#](x1) = [0] [0] [c_3](x1) = [1 0] x1 + [0] [0 1] [0] [c_4] = [0] [0] [main^#](x1) = [0 1] x1 + [0] [0 0] [0] [c_5](x1) = [1 0] x1 + [0] [0 1] [0] [c_6] = [0] [0] The order satisfies the following ordering constraints: [iter#3(S(x6))] = [0 1] x6 + [1] [2 0] [4] > [0 1] x6 + [0] [0 0] [0] = [compS_f(iter#3(x6))] [iter#3(0())] = [1] [0] > [0] [0] = [id()] [compS_f#1^#(compS_f(x2), x1)] = [1 0] x2 + [0] [0 0] [0] >= [1 0] x2 + [0] [0 0] [0] = [c_1(compS_f#1^#(x2, S(x1)))] [compS_f#1^#(id(), x3)] = [0] [0] >= [0] [0] = [c_2()] [iter#3^#(S(x6))] = [0] [0] >= [0] [0] = [c_3(iter#3^#(x6))] [iter#3^#(0())] = [0] [0] >= [0] [0] = [c_4()] [main^#(S(x9))] = [0 1] x9 + [1] [0 0] [0] > [0 1] x9 + [0] [0 0] [0] = [c_5(compS_f#1^#(iter#3(x9), 0()))] [main^#(0())] = [1] [0] > [0] [0] = [c_6()] 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: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , iter#3^#(0()) -> c_4() } Weak DPs: { main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) , main^#(0()) -> c_6() } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We estimate the number of application of {4} by applications of Pre({4}) = {3}. Here rules are labeled as follows: DPs: { 1: compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , 2: compS_f#1^#(id(), x3) -> c_2() , 3: iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , 4: iter#3^#(0()) -> c_4() , 5: main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) , 6: main^#(0()) -> c_6() } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { iter#3^#(0()) -> c_4() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) , main^#(0()) -> c_6() } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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. { iter#3^#(0()) -> c_4() , main^#(0()) -> c_6() } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We analyse the complexity of following sub-problems (R) and (S). Problem (S) is obtained from the input problem by shifting strict rules from (R) into the weak component: Problem (R): ------------ Strict DPs: { compS_f#1^#(id(), x3) -> c_2() } Weak DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost Problem (S): ------------ Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { compS_f#1^#(id(), x3) -> c_2() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost Overall, the transformation results in the following sub-problem(s): Generated new problems: ----------------------- R) Strict DPs: { compS_f#1^#(id(), x3) -> c_2() } Weak DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost This problem was proven YES(O(1),O(n^1)). S) Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { compS_f#1^#(id(), x3) -> c_2() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost This problem was proven YES(O(1),O(n^1)). Proofs for generated problems: ------------------------------ R) We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(id(), x3) -> c_2() } Weak DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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. { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(id(), x3) -> c_2() } Weak DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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: compS_f#1^#(id(), x3) -> c_2() , 2: compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , 3: main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Sub-proof: ---------- The input was oriented with the instance of 'Small Polynomial Path Order (PS,1-bounded)' as induced by the safe mapping safe(compS_f) = {1}, safe(S) = {1}, safe(id) = {}, safe(iter#3) = {}, safe(0) = {}, safe(compS_f#1^#) = {2}, safe(c_1) = {}, safe(c_2) = {}, safe(main^#) = {}, safe(c_5) = {} and precedence compS_f#1^# ~ main^# . Following symbols are considered recursive: {compS_f#1^#, main^#} The recursion depth is 1. Further, following argument filtering is employed: pi(compS_f) = [1], pi(S) = [1], pi(id) = [], pi(iter#3) = 1, pi(0) = [], pi(compS_f#1^#) = [1, 2], pi(c_1) = [1], pi(c_2) = [], pi(main^#) = [1], pi(c_5) = [1] Usable defined function symbols are a subset of: {iter#3, compS_f#1^#, main^#} For your convenience, here are the satisfied ordering constraints: pi(compS_f#1^#(compS_f(x2), x1)) = compS_f#1^#(compS_f(; x2); x1) > c_1(compS_f#1^#(x2; S(; x1));) = pi(c_1(compS_f#1^#(x2, S(x1)))) pi(compS_f#1^#(id(), x3)) = compS_f#1^#(id(); x3) > c_2() = pi(c_2()) pi(main^#(S(x9))) = main^#(S(; x9);) > c_5(compS_f#1^#(x9; 0());) = pi(c_5(compS_f#1^#(iter#3(x9), 0()))) pi(iter#3(S(x6))) = S(; x6) >= compS_f(; x6) = pi(compS_f(iter#3(x6))) pi(iter#3(0())) = 0() >= id() = pi(id()) 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: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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. { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , compS_f#1^#(id(), x3) -> c_2() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } Obligation: innermost runtime complexity Answer: YES(O(1),O(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(1)). Rules: Empty Obligation: innermost runtime complexity Answer: YES(O(1),O(1)) Empty rules are trivially bounded S) We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { compS_f#1^#(id(), x3) -> c_2() , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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. { compS_f#1^#(id(), x3) -> c_2() } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We analyse the complexity of following sub-problems (R) and (S). Problem (S) is obtained from the input problem by shifting strict rules from (R) into the weak component: Problem (R): ------------ Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) } Weak DPs: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost Problem (S): ------------ Strict DPs: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost Overall, the transformation results in the following sub-problem(s): Generated new problems: ----------------------- R) Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) } Weak DPs: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost This problem was proven YES(O(1),O(n^1)). S) Strict DPs: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } StartTerms: basic terms Strategy: innermost This problem was proven YES(O(1),O(n^1)). Proofs for generated problems: ------------------------------ R) We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) } Weak DPs: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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. { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) } Weak DPs: { main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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: compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , 2: main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Sub-proof: ---------- The input was oriented with the instance of 'Small Polynomial Path Order (PS,1-bounded)' as induced by the safe mapping safe(compS_f) = {1}, safe(S) = {1}, safe(id) = {}, safe(iter#3) = {}, safe(0) = {}, safe(compS_f#1^#) = {2}, safe(c_1) = {}, safe(main^#) = {}, safe(c_5) = {} and precedence compS_f#1^# ~ main^# . Following symbols are considered recursive: {compS_f#1^#, main^#} The recursion depth is 1. Further, following argument filtering is employed: pi(compS_f) = [1], pi(S) = [1], pi(id) = [], pi(iter#3) = 1, pi(0) = [], pi(compS_f#1^#) = [1], pi(c_1) = [1], pi(main^#) = [1], pi(c_5) = [1] Usable defined function symbols are a subset of: {iter#3, compS_f#1^#, main^#} For your convenience, here are the satisfied ordering constraints: pi(compS_f#1^#(compS_f(x2), x1)) = compS_f#1^#(compS_f(; x2);) > c_1(compS_f#1^#(x2;);) = pi(c_1(compS_f#1^#(x2, S(x1)))) pi(main^#(S(x9))) = main^#(S(; x9);) > c_5(compS_f#1^#(x9;);) = pi(c_5(compS_f#1^#(iter#3(x9), 0()))) pi(iter#3(S(x6))) = S(; x6) >= compS_f(; x6) = pi(compS_f(iter#3(x6))) pi(iter#3(0())) = 0() >= id() = pi(id()) 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: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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. { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } Obligation: innermost runtime complexity Answer: YES(O(1),O(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(1)). Rules: Empty Obligation: innermost runtime complexity Answer: YES(O(1),O(1)) Empty rules are trivially bounded S) We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak DPs: { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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. { compS_f#1^#(compS_f(x2), x1) -> c_1(compS_f#1^#(x2, S(x1))) , main^#(S(x9)) -> c_5(compS_f#1^#(iter#3(x9), 0())) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } Weak Trs: { iter#3(S(x6)) -> compS_f(iter#3(x6)) , iter#3(0()) -> id() } 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: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } 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: iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } 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(iter#3^#) = {}, safe(c_3) = {} and precedence empty . Following symbols are considered recursive: {iter#3^#} The recursion depth is 1. Further, following argument filtering is employed: pi(S) = [1], pi(iter#3^#) = [1], pi(c_3) = [1] Usable defined function symbols are a subset of: {iter#3^#} For your convenience, here are the satisfied ordering constraints: pi(iter#3^#(S(x6))) = iter#3^#(S(; x6);) > c_3(iter#3^#(x6;);) = pi(c_3(iter#3^#(x6))) 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: { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } 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. { iter#3^#(S(x6)) -> c_3(iter#3^#(x6)) } 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))