YES Problem 1: (VAR v_NonEmpty:S n:S u:S v:S w:S x:S y:S z:S) (RULES app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ) Problem 1: Innermost Equivalent Processor: -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil -> The term rewriting system is non-overlaping or locally confluent overlay system. Therefore, innermost termination implies termination. Problem 1: Dependency Pairs Processor: -> Pairs: APP(add(n:S,x:S),y:S) -> APP(x:S,y:S) CONCAT(cons(u:S,v:S),y:S) -> CONCAT(v:S,y:S) LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> CONCAT(u:S,v:S) LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> CONCAT(w:S,z:S) LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> LESS_LEAVES(concat(u:S,v:S),concat(w:S,z:S)) MINUS(s(x:S),s(y:S)) -> MINUS(x:S,y:S) QUOT(s(x:S),s(y:S)) -> MINUS(x:S,y:S) QUOT(s(x:S),s(y:S)) -> QUOT(minus(x:S,y:S),s(y:S)) REVERSE(add(n:S,x:S)) -> APP(reverse(x:S),add(n:S,nil)) REVERSE(add(n:S,x:S)) -> REVERSE(x:S) SHUFFLE(add(n:S,x:S)) -> REVERSE(x:S) SHUFFLE(add(n:S,x:S)) -> SHUFFLE(reverse(x:S)) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil Problem 1: SCC Processor: -> Pairs: APP(add(n:S,x:S),y:S) -> APP(x:S,y:S) CONCAT(cons(u:S,v:S),y:S) -> CONCAT(v:S,y:S) LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> CONCAT(u:S,v:S) LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> CONCAT(w:S,z:S) LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> LESS_LEAVES(concat(u:S,v:S),concat(w:S,z:S)) MINUS(s(x:S),s(y:S)) -> MINUS(x:S,y:S) QUOT(s(x:S),s(y:S)) -> MINUS(x:S,y:S) QUOT(s(x:S),s(y:S)) -> QUOT(minus(x:S,y:S),s(y:S)) REVERSE(add(n:S,x:S)) -> APP(reverse(x:S),add(n:S,nil)) REVERSE(add(n:S,x:S)) -> REVERSE(x:S) SHUFFLE(add(n:S,x:S)) -> REVERSE(x:S) SHUFFLE(add(n:S,x:S)) -> SHUFFLE(reverse(x:S)) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: MINUS(s(x:S),s(y:S)) -> MINUS(x:S,y:S) ->->-> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->->Cycle: ->->-> Pairs: QUOT(s(x:S),s(y:S)) -> QUOT(minus(x:S,y:S),s(y:S)) ->->-> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->->Cycle: ->->-> Pairs: CONCAT(cons(u:S,v:S),y:S) -> CONCAT(v:S,y:S) ->->-> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->->Cycle: ->->-> Pairs: LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> LESS_LEAVES(concat(u:S,v:S),concat(w:S,z:S)) ->->-> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->->Cycle: ->->-> Pairs: APP(add(n:S,x:S),y:S) -> APP(x:S,y:S) ->->-> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->->Cycle: ->->-> Pairs: REVERSE(add(n:S,x:S)) -> REVERSE(x:S) ->->-> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->->Cycle: ->->-> Pairs: SHUFFLE(add(n:S,x:S)) -> SHUFFLE(reverse(x:S)) ->->-> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil The problem is decomposed in 7 subproblems. Problem 1.1: Subterm Processor: -> Pairs: MINUS(s(x:S),s(y:S)) -> MINUS(x:S,y:S) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Projection: pi(MINUS) = 1 Problem 1.1: SCC Processor: -> Pairs: Empty -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.2: Reduction Pairs Processor: -> Pairs: QUOT(s(x:S),s(y:S)) -> QUOT(minus(x:S,y:S),s(y:S)) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil -> Usable rules: minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [app](X1,X2) = 0 [concat](X1,X2) = 0 [less_leaves](X1,X2) = 0 [minus](X1,X2) = 2.X1 [quot](X1,X2) = 0 [reverse](X) = 0 [shuffle](X) = 0 [0] = 0 [add](X1,X2) = 0 [cons](X1,X2) = 0 [fSNonEmpty] = 0 [false] = 0 [leaf] = 0 [nil] = 0 [s](X) = 2.X + 2 [true] = 0 [APP](X1,X2) = 0 [CONCAT](X1,X2) = 0 [LESS_LEAVES](X1,X2) = 0 [MINUS](X1,X2) = 0 [QUOT](X1,X2) = 2.X1 [REVERSE](X) = 0 [SHUFFLE](X) = 0 Problem 1.2: SCC Processor: -> Pairs: Empty -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.3: Subterm Processor: -> Pairs: CONCAT(cons(u:S,v:S),y:S) -> CONCAT(v:S,y:S) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Projection: pi(CONCAT) = 1 Problem 1.3: SCC Processor: -> Pairs: Empty -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.4: Reduction Pairs Processor: -> Pairs: LESS_LEAVES(cons(u:S,v:S),cons(w:S,z:S)) -> LESS_LEAVES(concat(u:S,v:S),concat(w:S,z:S)) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil -> Usable rules: concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [app](X1,X2) = 0 [concat](X1,X2) = 2.X1 + X2 [less_leaves](X1,X2) = 0 [minus](X1,X2) = 0 [quot](X1,X2) = 0 [reverse](X) = 0 [shuffle](X) = 0 [0] = 0 [add](X1,X2) = 0 [cons](X1,X2) = 2.X1 + X2 + 2 [fSNonEmpty] = 0 [false] = 0 [leaf] = 0 [nil] = 0 [s](X) = 0 [true] = 0 [APP](X1,X2) = 0 [CONCAT](X1,X2) = 0 [LESS_LEAVES](X1,X2) = 2.X1 + X2 [MINUS](X1,X2) = 0 [QUOT](X1,X2) = 0 [REVERSE](X) = 0 [SHUFFLE](X) = 0 Problem 1.4: SCC Processor: -> Pairs: Empty -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.5: Subterm Processor: -> Pairs: APP(add(n:S,x:S),y:S) -> APP(x:S,y:S) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Projection: pi(APP) = 1 Problem 1.5: SCC Processor: -> Pairs: Empty -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.6: Subterm Processor: -> Pairs: REVERSE(add(n:S,x:S)) -> REVERSE(x:S) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Projection: pi(REVERSE) = 1 Problem 1.6: SCC Processor: -> Pairs: Empty -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.7: Reduction Pairs Processor: -> Pairs: SHUFFLE(add(n:S,x:S)) -> SHUFFLE(reverse(x:S)) -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil -> Usable rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [app](X1,X2) = X1 + X2 [concat](X1,X2) = 0 [less_leaves](X1,X2) = 0 [minus](X1,X2) = 0 [quot](X1,X2) = 0 [reverse](X) = X [shuffle](X) = 0 [0] = 0 [add](X1,X2) = X1 + X2 + 2 [cons](X1,X2) = 0 [fSNonEmpty] = 0 [false] = 0 [leaf] = 0 [nil] = 0 [s](X) = 0 [true] = 0 [APP](X1,X2) = 0 [CONCAT](X1,X2) = 0 [LESS_LEAVES](X1,X2) = 0 [MINUS](X1,X2) = 0 [QUOT](X1,X2) = 0 [REVERSE](X) = 0 [SHUFFLE](X) = X Problem 1.7: SCC Processor: -> Pairs: Empty -> Rules: app(add(n:S,x:S),y:S) -> add(n:S,app(x:S,y:S)) app(nil,y:S) -> y:S concat(cons(u:S,v:S),y:S) -> cons(u:S,concat(v:S,y:S)) concat(leaf,y:S) -> y:S less_leaves(cons(u:S,v:S),cons(w:S,z:S)) -> less_leaves(concat(u:S,v:S),concat(w:S,z:S)) less_leaves(leaf,cons(w:S,z:S)) -> ttrue less_leaves(x:S,leaf) -> ffalse minus(s(x:S),s(y:S)) -> minus(x:S,y:S) minus(x:S,0) -> x:S quot(0,s(y:S)) -> 0 quot(s(x:S),s(y:S)) -> s(quot(minus(x:S,y:S),s(y:S))) reverse(add(n:S,x:S)) -> app(reverse(x:S),add(n:S,nil)) reverse(nil) -> nil shuffle(add(n:S,x:S)) -> add(n:S,shuffle(reverse(x:S))) shuffle(nil) -> nil ->Strongly Connected Components: There is no strongly connected component The problem is finite.