* Step 1: DependencyPairs WORST_CASE(?,O(n^1)) + Considered Problem: - Strict TRS: g(e(x),e(y)) -> e(g(x,y)) h(z,e(x)) -> h(c(z),d(z,x)) - Signature: {g/2,h/2} / {c/1,d/2,e/1} - Obligation: innermost runtime complexity wrt. defined symbols {g,h} and constructors {c,d,e} + Applied Processor: DependencyPairs {dpKind_ = WIDP} + Details: We add the following weak innermost dependency pairs: Strict DPs g#(e(x),e(y)) -> c_1(g#(x,y)) h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) Weak DPs and mark the set of starting terms. * Step 2: UsableRules WORST_CASE(?,O(n^1)) + Considered Problem: - Strict DPs: g#(e(x),e(y)) -> c_1(g#(x,y)) h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) - Strict TRS: g(e(x),e(y)) -> e(g(x,y)) h(z,e(x)) -> h(c(z),d(z,x)) - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: UsableRules + Details: We replace rewrite rules by usable rules: g#(e(x),e(y)) -> c_1(g#(x,y)) h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) * Step 3: PredecessorEstimation WORST_CASE(?,O(n^1)) + Considered Problem: - Strict DPs: g#(e(x),e(y)) -> c_1(g#(x,y)) h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: PredecessorEstimation {onSelection = all simple predecessor estimation selector} + Details: We estimate the number of application of {2} by application of Pre({2}) = {}. Here rules are labelled as follows: 1: g#(e(x),e(y)) -> c_1(g#(x,y)) 2: h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) * Step 4: RemoveWeakSuffixes WORST_CASE(?,O(n^1)) + Considered Problem: - Strict DPs: g#(e(x),e(y)) -> c_1(g#(x,y)) - Weak DPs: h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: RemoveWeakSuffixes + Details: Consider the dependency graph 1:S:g#(e(x),e(y)) -> c_1(g#(x,y)) -->_1 g#(e(x),e(y)) -> c_1(g#(x,y)):1 2:W:h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed. 2: h#(z,e(x)) -> c_2(h#(c(z),d(z,x))) * Step 5: PredecessorEstimationCP WORST_CASE(?,O(n^1)) + Considered Problem: - Strict DPs: g#(e(x),e(y)) -> c_1(g#(x,y)) - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}} + Details: We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly: 1: g#(e(x),e(y)) -> c_1(g#(x,y)) The strictly oriented rules are moved into the weak component. ** Step 5.a:1: NaturalMI WORST_CASE(?,O(n^1)) + Considered Problem: - Strict DPs: g#(e(x),e(y)) -> c_1(g#(x,y)) - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules} + Details: We apply a matrix interpretation of kind constructor based matrix interpretation: The following argument positions are considered usable: uargs(c_1) = {1} Following symbols are considered usable: {g#,h#} TcT has computed the following interpretation: p(c) = [0] p(d) = [1] x2 + [0] p(e) = [1] x1 + [1] p(g) = [1] x1 + [1] x2 + [8] p(h) = [1] x1 + [1] x2 + [2] p(g#) = [1] x1 + [0] p(h#) = [2] x1 + [1] x2 + [1] p(c_1) = [1] x1 + [0] p(c_2) = [1] Following rules are strictly oriented: g#(e(x),e(y)) = [1] x + [1] > [1] x + [0] = c_1(g#(x,y)) Following rules are (at-least) weakly oriented: ** Step 5.a:2: Assumption WORST_CASE(?,O(1)) + Considered Problem: - Weak DPs: g#(e(x),e(y)) -> c_1(g#(x,y)) - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}} + Details: () ** Step 5.b:1: RemoveWeakSuffixes WORST_CASE(?,O(1)) + Considered Problem: - Weak DPs: g#(e(x),e(y)) -> c_1(g#(x,y)) - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: RemoveWeakSuffixes + Details: Consider the dependency graph 1:W:g#(e(x),e(y)) -> c_1(g#(x,y)) -->_1 g#(e(x),e(y)) -> c_1(g#(x,y)):1 The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed. 1: g#(e(x),e(y)) -> c_1(g#(x,y)) ** Step 5.b:2: EmptyProcessor WORST_CASE(?,O(1)) + Considered Problem: - Signature: {g/2,h/2,g#/2,h#/2} / {c/1,d/2,e/1,c_1/1,c_2/1} - Obligation: innermost runtime complexity wrt. defined symbols {g#,h#} and constructors {c,d,e} + Applied Processor: EmptyProcessor + Details: The problem is already closed. The intended complexity is O(1). WORST_CASE(?,O(n^1))