MAYBE * Step 1: DependencyPairs MAYBE + Considered Problem: - Strict TRS: *(X,+(Y,1())) -> +(*(X,+(Y,*(1(),0()))),X) *(X,0()) -> X *(X,0()) -> 0() *(X,1()) -> X - Signature: {*/2} / {+/2,0/0,1/0} - Obligation: innermost runtime complexity wrt. defined symbols {*} and constructors {+,0,1} + Applied Processor: DependencyPairs {dpKind_ = WIDP} + Details: We add the following weak innermost dependency pairs: Strict DPs *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) *#(X,0()) -> c_2() *#(X,0()) -> c_3() *#(X,1()) -> c_4() Weak DPs and mark the set of starting terms. * Step 2: UsableRules MAYBE + Considered Problem: - Strict DPs: *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) *#(X,0()) -> c_2() *#(X,0()) -> c_3() *#(X,1()) -> c_4() - Strict TRS: *(X,+(Y,1())) -> +(*(X,+(Y,*(1(),0()))),X) *(X,0()) -> X *(X,0()) -> 0() *(X,1()) -> X - Signature: {*/2,*#/2} / {+/2,0/0,1/0,c_1/1,c_2/0,c_3/0,c_4/0} - Obligation: innermost runtime complexity wrt. defined symbols {*#} and constructors {+,0,1} + Applied Processor: UsableRules + Details: We replace rewrite rules by usable rules: *(X,0()) -> X *(X,0()) -> 0() *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) *#(X,0()) -> c_2() *#(X,0()) -> c_3() *#(X,1()) -> c_4() * Step 3: WeightGap MAYBE + Considered Problem: - Strict DPs: *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) *#(X,0()) -> c_2() *#(X,0()) -> c_3() *#(X,1()) -> c_4() - Strict TRS: *(X,0()) -> X *(X,0()) -> 0() - Signature: {*/2,*#/2} / {+/2,0/0,1/0,c_1/1,c_2/0,c_3/0,c_4/0} - Obligation: innermost runtime complexity wrt. defined symbols {*#} and constructors {+,0,1} + Applied Processor: WeightGap {wgDimension = 1, wgDegree = 1, wgKind = Algebraic, wgUArgs = UArgs, wgOn = WgOnTrs} + Details: The weightgap principle applies using the following constant growth matrix-interpretation: We apply a matrix interpretation of kind constructor based matrix interpretation: The following argument positions are considered usable: uargs(+) = {2}, uargs(*#) = {2}, uargs(c_1) = {1} Following symbols are considered usable: all TcT has computed the following interpretation: p(*) = [2] x1 + [3] p(+) = [1] x1 + [1] x2 + [0] p(0) = [0] p(1) = [0] p(*#) = [1] x2 + [0] p(c_1) = [1] x1 + [0] p(c_2) = [0] p(c_3) = [0] p(c_4) = [0] Following rules are strictly oriented: *(X,0()) = [2] X + [3] > [1] X + [0] = X *(X,0()) = [2] X + [3] > [0] = 0() Following rules are (at-least) weakly oriented: *#(X,+(Y,1())) = [1] Y + [0] >= [1] Y + [3] = c_1(*#(X,+(Y,*(1(),0())))) *#(X,0()) = [0] >= [0] = c_2() *#(X,0()) = [0] >= [0] = c_3() *#(X,1()) = [0] >= [0] = c_4() Further, it can be verified that all rules not oriented are covered by the weightgap condition. * Step 4: PredecessorEstimation MAYBE + Considered Problem: - Strict DPs: *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) *#(X,0()) -> c_2() *#(X,0()) -> c_3() *#(X,1()) -> c_4() - Weak TRS: *(X,0()) -> X *(X,0()) -> 0() - Signature: {*/2,*#/2} / {+/2,0/0,1/0,c_1/1,c_2/0,c_3/0,c_4/0} - Obligation: innermost runtime complexity wrt. defined symbols {*#} and constructors {+,0,1} + Applied Processor: PredecessorEstimation {onSelection = all simple predecessor estimation selector} + Details: We estimate the number of application of {2,3,4} by application of Pre({2,3,4}) = {}. Here rules are labelled as follows: 1: *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) 2: *#(X,0()) -> c_2() 3: *#(X,0()) -> c_3() 4: *#(X,1()) -> c_4() * Step 5: RemoveWeakSuffixes MAYBE + Considered Problem: - Strict DPs: *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) - Weak DPs: *#(X,0()) -> c_2() *#(X,0()) -> c_3() *#(X,1()) -> c_4() - Weak TRS: *(X,0()) -> X *(X,0()) -> 0() - Signature: {*/2,*#/2} / {+/2,0/0,1/0,c_1/1,c_2/0,c_3/0,c_4/0} - Obligation: innermost runtime complexity wrt. defined symbols {*#} and constructors {+,0,1} + Applied Processor: RemoveWeakSuffixes + Details: Consider the dependency graph 1:S:*#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) -->_1 *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))):1 2:W:*#(X,0()) -> c_2() 3:W:*#(X,0()) -> c_3() 4:W:*#(X,1()) -> c_4() The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed. 4: *#(X,1()) -> c_4() 3: *#(X,0()) -> c_3() 2: *#(X,0()) -> c_2() * Step 6: Failure MAYBE + Considered Problem: - Strict DPs: *#(X,+(Y,1())) -> c_1(*#(X,+(Y,*(1(),0())))) - Weak TRS: *(X,0()) -> X *(X,0()) -> 0() - Signature: {*/2,*#/2} / {+/2,0/0,1/0,c_1/1,c_2/0,c_3/0,c_4/0} - Obligation: innermost runtime complexity wrt. defined symbols {*#} and constructors {+,0,1} + Applied Processor: EmptyProcessor + Details: The problem is still open. MAYBE