MAYBE * Step 1: DependencyPairs MAYBE + Considered Problem: - Strict TRS: f(x,y,g(z)) -> g(f(x,y,z)) f(x,g(y),z) -> g(f(x,y,z)) f(0(),1(),x) -> f(g(x),g(x),x) f(g(x),y,z) -> g(f(x,y,z)) - Signature: {f/3} / {0/0,1/0,g/1} - Obligation: innermost runtime complexity wrt. defined symbols {f} and constructors {0,1,g} + Applied Processor: DependencyPairs {dpKind_ = WIDP} + Details: We add the following weak innermost dependency pairs: Strict DPs f#(x,y,g(z)) -> c_1(f#(x,y,z)) f#(x,g(y),z) -> c_2(f#(x,y,z)) f#(0(),1(),x) -> c_3(f#(g(x),g(x),x)) f#(g(x),y,z) -> c_4(f#(x,y,z)) Weak DPs and mark the set of starting terms. * Step 2: UsableRules MAYBE + Considered Problem: - Strict DPs: f#(x,y,g(z)) -> c_1(f#(x,y,z)) f#(x,g(y),z) -> c_2(f#(x,y,z)) f#(0(),1(),x) -> c_3(f#(g(x),g(x),x)) f#(g(x),y,z) -> c_4(f#(x,y,z)) - Strict TRS: f(x,y,g(z)) -> g(f(x,y,z)) f(x,g(y),z) -> g(f(x,y,z)) f(0(),1(),x) -> f(g(x),g(x),x) f(g(x),y,z) -> g(f(x,y,z)) - Signature: {f/3,f#/3} / {0/0,1/0,g/1,c_1/1,c_2/1,c_3/1,c_4/1} - Obligation: innermost runtime complexity wrt. defined symbols {f#} and constructors {0,1,g} + Applied Processor: UsableRules + Details: We replace rewrite rules by usable rules: f#(x,y,g(z)) -> c_1(f#(x,y,z)) f#(x,g(y),z) -> c_2(f#(x,y,z)) f#(0(),1(),x) -> c_3(f#(g(x),g(x),x)) f#(g(x),y,z) -> c_4(f#(x,y,z)) * Step 3: PredecessorEstimationCP MAYBE + Considered Problem: - Strict DPs: f#(x,y,g(z)) -> c_1(f#(x,y,z)) f#(x,g(y),z) -> c_2(f#(x,y,z)) f#(0(),1(),x) -> c_3(f#(g(x),g(x),x)) f#(g(x),y,z) -> c_4(f#(x,y,z)) - Signature: {f/3,f#/3} / {0/0,1/0,g/1,c_1/1,c_2/1,c_3/1,c_4/1} - Obligation: innermost runtime complexity wrt. defined symbols {f#} and constructors {0,1,g} + 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: f#(x,y,g(z)) -> c_1(f#(x,y,z)) The strictly oriented rules are moved into the weak component. ** Step 3.a:1: NaturalMI WORST_CASE(?,O(n^1)) + Considered Problem: - Strict DPs: f#(x,y,g(z)) -> c_1(f#(x,y,z)) f#(x,g(y),z) -> c_2(f#(x,y,z)) f#(0(),1(),x) -> c_3(f#(g(x),g(x),x)) f#(g(x),y,z) -> c_4(f#(x,y,z)) - Signature: {f/3,f#/3} / {0/0,1/0,g/1,c_1/1,c_2/1,c_3/1,c_4/1} - Obligation: innermost runtime complexity wrt. defined symbols {f#} and constructors {0,1,g} + 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}, uargs(c_2) = {1}, uargs(c_3) = {1}, uargs(c_4) = {1} Following symbols are considered usable: {f#} TcT has computed the following interpretation: p(0) = [0] p(1) = [0] p(f) = [4] x1 + [1] x2 + [1] x3 + [0] p(g) = [1] x1 + [2] p(f#) = [2] x3 + [0] p(c_1) = [1] x1 + [3] p(c_2) = [1] x1 + [0] p(c_3) = [1] x1 + [0] p(c_4) = [1] x1 + [0] Following rules are strictly oriented: f#(x,y,g(z)) = [2] z + [4] > [2] z + [3] = c_1(f#(x,y,z)) Following rules are (at-least) weakly oriented: f#(x,g(y),z) = [2] z + [0] >= [2] z + [0] = c_2(f#(x,y,z)) f#(0(),1(),x) = [2] x + [0] >= [2] x + [0] = c_3(f#(g(x),g(x),x)) f#(g(x),y,z) = [2] z + [0] >= [2] z + [0] = c_4(f#(x,y,z)) ** Step 3.a:2: Assumption WORST_CASE(?,O(1)) + Considered Problem: - Strict DPs: f#(x,g(y),z) -> c_2(f#(x,y,z)) f#(0(),1(),x) -> c_3(f#(g(x),g(x),x)) f#(g(x),y,z) -> c_4(f#(x,y,z)) - Weak DPs: f#(x,y,g(z)) -> c_1(f#(x,y,z)) - Signature: {f/3,f#/3} / {0/0,1/0,g/1,c_1/1,c_2/1,c_3/1,c_4/1} - Obligation: innermost runtime complexity wrt. defined symbols {f#} and constructors {0,1,g} + Applied Processor: Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}} + Details: () ** Step 3.b:1: Failure MAYBE + Considered Problem: - Strict DPs: f#(x,g(y),z) -> c_2(f#(x,y,z)) f#(0(),1(),x) -> c_3(f#(g(x),g(x),x)) f#(g(x),y,z) -> c_4(f#(x,y,z)) - Weak DPs: f#(x,y,g(z)) -> c_1(f#(x,y,z)) - Signature: {f/3,f#/3} / {0/0,1/0,g/1,c_1/1,c_2/1,c_3/1,c_4/1} - Obligation: innermost runtime complexity wrt. defined symbols {f#} and constructors {0,1,g} + Applied Processor: EmptyProcessor + Details: The problem is still open. MAYBE