/export/starexec/sandbox2/solver/bin/starexec_run_default /export/starexec/sandbox2/benchmark/theBenchmark.xml /export/starexec/sandbox2/output/output_files -------------------------------------------------------------------------------- YES Problem 1: (VAR X X1 X2 XS) (RULES active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ) Problem 1: Dependency Pairs Processor: -> Pairs: ACTIVE(tail(cons(X,XS))) -> MARK(XS) ACTIVE(zeros) -> MARK(cons(0,zeros)) CONS(active(X1),X2) -> CONS(X1,X2) CONS(mark(X1),X2) -> CONS(X1,X2) CONS(X1,active(X2)) -> CONS(X1,X2) CONS(X1,mark(X2)) -> CONS(X1,X2) MARK(cons(X1,X2)) -> ACTIVE(cons(mark(X1),X2)) MARK(cons(X1,X2)) -> CONS(mark(X1),X2) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(tail(X)) -> TAIL(mark(X)) MARK(zeros) -> ACTIVE(zeros) TAIL(active(X)) -> TAIL(X) TAIL(mark(X)) -> TAIL(X) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) Problem 1: SCC Processor: -> Pairs: ACTIVE(tail(cons(X,XS))) -> MARK(XS) ACTIVE(zeros) -> MARK(cons(0,zeros)) CONS(active(X1),X2) -> CONS(X1,X2) CONS(mark(X1),X2) -> CONS(X1,X2) CONS(X1,active(X2)) -> CONS(X1,X2) CONS(X1,mark(X2)) -> CONS(X1,X2) MARK(cons(X1,X2)) -> ACTIVE(cons(mark(X1),X2)) MARK(cons(X1,X2)) -> CONS(mark(X1),X2) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(tail(X)) -> TAIL(mark(X)) MARK(zeros) -> ACTIVE(zeros) TAIL(active(X)) -> TAIL(X) TAIL(mark(X)) -> TAIL(X) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: TAIL(active(X)) -> TAIL(X) TAIL(mark(X)) -> TAIL(X) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->->Cycle: ->->-> Pairs: CONS(active(X1),X2) -> CONS(X1,X2) CONS(mark(X1),X2) -> CONS(X1,X2) CONS(X1,active(X2)) -> CONS(X1,X2) CONS(X1,mark(X2)) -> CONS(X1,X2) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->->Cycle: ->->-> Pairs: ACTIVE(tail(cons(X,XS))) -> MARK(XS) ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> ACTIVE(cons(mark(X1),X2)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) The problem is decomposed in 3 subproblems. Problem 1.1: Subterm Processor: -> Pairs: TAIL(active(X)) -> TAIL(X) TAIL(mark(X)) -> TAIL(X) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Projection: pi(TAIL) = 1 Problem 1.1: SCC Processor: -> Pairs: Empty -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.2: Subterm Processor: -> Pairs: CONS(active(X1),X2) -> CONS(X1,X2) CONS(mark(X1),X2) -> CONS(X1,X2) CONS(X1,active(X2)) -> CONS(X1,X2) CONS(X1,mark(X2)) -> CONS(X1,X2) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Projection: pi(CONS) = 1 Problem 1.2: SCC Processor: -> Pairs: CONS(X1,active(X2)) -> CONS(X1,X2) CONS(X1,mark(X2)) -> CONS(X1,X2) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: CONS(X1,active(X2)) -> CONS(X1,X2) CONS(X1,mark(X2)) -> CONS(X1,X2) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) Problem 1.2: Subterm Processor: -> Pairs: CONS(X1,active(X2)) -> CONS(X1,X2) CONS(X1,mark(X2)) -> CONS(X1,X2) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Projection: pi(CONS) = 2 Problem 1.2: SCC Processor: -> Pairs: Empty -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.3: Reduction Pair Processor: -> Pairs: ACTIVE(tail(cons(X,XS))) -> MARK(XS) ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> ACTIVE(cons(mark(X1),X2)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) -> Usable rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [active](X) = X [cons](X1,X2) = 2.X1 + 2.X2 [mark](X) = 2.X [tail](X) = 2.X + 1 [0] = 0 [zeros] = 0 [ACTIVE](X) = X [MARK](X) = 2.X Problem 1.3: SCC Processor: -> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> ACTIVE(cons(mark(X1),X2)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> ACTIVE(cons(mark(X1),X2)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) Problem 1.3: Reduction Pair Processor: -> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> ACTIVE(cons(mark(X1),X2)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) -> Usable rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [active](X) = 2 [cons](X1,X2) = 0 [mark](X) = 2 [tail](X) = 2 [0] = 0 [zeros] = 2 [ACTIVE](X) = X [MARK](X) = 2 Problem 1.3: SCC Processor: -> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) Problem 1.3: Reduction Pair Processor: -> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> ACTIVE(tail(mark(X))) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) -> Usable rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [active](X) = X [cons](X1,X2) = 2.X1 + 2.X2 [mark](X) = 2.X [tail](X) = 2.X + 2 [0] = 0 [zeros] = 0 [ACTIVE](X) = 2 [MARK](X) = 2.X + 2 Problem 1.3: SCC Processor: -> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) Problem 1.3: Reduction Pair Processor: -> Pairs: ACTIVE(zeros) -> MARK(cons(0,zeros)) MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) -> Usable rules: cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [active](X) = 2.X [cons](X1,X2) = 2.X1 + 1 [mark](X) = X [tail](X) = 2.X [0] = 0 [zeros] = 2 [ACTIVE](X) = X + 2 [MARK](X) = 2.X + 1 Problem 1.3: SCC Processor: -> Pairs: MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> MARK(X) MARK(zeros) -> ACTIVE(zeros) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> MARK(X) ->->-> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) Problem 1.3: Subterm Processor: -> Pairs: MARK(cons(X1,X2)) -> MARK(X1) MARK(tail(X)) -> MARK(X) -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Projection: pi(MARK) = 1 Problem 1.3: SCC Processor: -> Pairs: Empty -> Rules: active(tail(cons(X,XS))) -> mark(XS) active(zeros) -> mark(cons(0,zeros)) cons(active(X1),X2) -> cons(X1,X2) cons(mark(X1),X2) -> cons(X1,X2) cons(X1,active(X2)) -> cons(X1,X2) cons(X1,mark(X2)) -> cons(X1,X2) mark(cons(X1,X2)) -> active(cons(mark(X1),X2)) mark(tail(X)) -> active(tail(mark(X))) mark(0) -> active(0) mark(zeros) -> active(zeros) tail(active(X)) -> tail(X) tail(mark(X)) -> tail(X) ->Strongly Connected Components: There is no strongly connected component The problem is finite.