YES(O(1),O(n^1)) We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict Trs: { plus(plus(X, Y), Z) -> plus(X, plus(Y, Z)) , times(X, s(Y)) -> plus(X, times(Y, X)) } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) The weightgap principle applies (using the following nonconstant growth matrix-interpretation) The following argument positions are usable: Uargs(plus) = {2} TcT has computed the following matrix interpretation satisfying not(EDA) and not(IDA(1)). [plus](x1, x2) = [1] x2 + [5] [times](x1, x2) = [1] x1 + [1] x2 + [7] [s](x1) = [1] x1 + [7] The following symbols are considered usable {plus, times} The order satisfies the following ordering constraints: [plus(plus(X, Y), Z)] = [1] Z + [5] ? [1] Z + [10] = [plus(X, plus(Y, Z))] [times(X, s(Y))] = [1] X + [1] Y + [14] > [1] X + [1] Y + [12] = [plus(X, times(Y, X))] 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 Trs: { plus(plus(X, Y), Z) -> plus(X, plus(Y, Z)) } Weak Trs: { times(X, s(Y)) -> plus(X, times(Y, X)) } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^1)) We use the processor 'matrix interpretation of dimension 2' to orient following rules strictly. Trs: { plus(plus(X, Y), Z) -> plus(X, plus(Y, Z)) } The induced complexity on above rules (modulo remaining rules) is YES(?,O(n^1)) . These rules are moved into the corresponding weak component(s). Sub-proof: ---------- The following argument positions are usable: Uargs(plus) = {2} TcT has computed the following constructor-based matrix interpretation satisfying not(EDA) and not(IDA(1)). [plus](x1, x2) = [0 1] x1 + [1 0] x2 + [0] [0 1] [0 1] [4] [times](x1, x2) = [1 1] x1 + [1 0] x2 + [1] [1 1] [1 0] [1] [s](x1) = [1 1] x1 + [7] [0 0] [0] The following symbols are considered usable {plus, times} The order satisfies the following ordering constraints: [plus(plus(X, Y), Z)] = [0 1] X + [0 1] Y + [1 0] Z + [4] [0 1] [0 1] [0 1] [8] > [0 1] X + [0 1] Y + [1 0] Z + [0] [0 1] [0 1] [0 1] [8] = [plus(X, plus(Y, Z))] [times(X, s(Y))] = [1 1] X + [1 1] Y + [8] [1 1] [1 1] [8] > [1 1] X + [1 1] Y + [1] [1 1] [1 1] [5] = [plus(X, times(Y, X))] We return to the main proof. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Weak Trs: { plus(plus(X, Y), Z) -> plus(X, plus(Y, Z)) , times(X, s(Y)) -> plus(X, times(Y, X)) } Obligation: innermost runtime complexity Answer: YES(O(1),O(1)) Empty rules are trivially bounded Hurray, we answered YES(O(1),O(n^1))