YES Problem 1: (VAR x y z) (THEORY (AC plus)) (RULES minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) ) Problem 1: Dependency Pairs Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: MINUS(minus(x,y),z) -> MINUS(x,plus(y,z)) MINUS(minus(x,y),z) -> PLUS(y,z) MINUS(s(x),s(y)) -> MINUS(x,y) PLUS(plus(0,y),x3) -> PLUS(y,x3) PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(plus(s(x),y),x3) -> PLUS(x,y) PLUS(s(x),y) -> PLUS(x,y) QUOT(s(x),s(y)) -> MINUS(x,y) QUOT(s(x),s(y)) -> QUOT(minus(x,y),s(y)) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) Problem 1: SCC Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: MINUS(minus(x,y),z) -> MINUS(x,plus(y,z)) MINUS(minus(x,y),z) -> PLUS(y,z) MINUS(s(x),s(y)) -> MINUS(x,y) PLUS(plus(0,y),x3) -> PLUS(y,x3) PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(plus(s(x),y),x3) -> PLUS(x,y) PLUS(s(x),y) -> PLUS(x,y) QUOT(s(x),s(y)) -> MINUS(x,y) QUOT(s(x),s(y)) -> QUOT(minus(x,y),s(y)) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: PLUS(plus(0,y),x3) -> PLUS(y,x3) PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(plus(s(x),y),x3) -> PLUS(x,y) PLUS(s(x),y) -> PLUS(x,y) -> FAxioms: plus(plus(x3,x4),x5) -> plus(x3,plus(x4,x5)) plus(x3,x4) -> plus(x4,x3) PLUS(plus(x3,x4),x5) -> PLUS(x3,plus(x4,x5)) PLUS(x3,x4) -> PLUS(x4,x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) ->->-> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->->Cycle: ->->-> Pairs: MINUS(minus(x,y),z) -> MINUS(x,plus(y,z)) MINUS(s(x),s(y)) -> MINUS(x,y) -> FAxioms: plus(plus(x3,x4),x5) -> plus(x3,plus(x4,x5)) plus(x3,x4) -> plus(x4,x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) ->->-> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: Empty ->->Cycle: ->->-> Pairs: QUOT(s(x),s(y)) -> QUOT(minus(x,y),s(y)) -> FAxioms: plus(plus(x3,x4),x5) -> plus(x3,plus(x4,x5)) plus(x3,x4) -> plus(x4,x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) ->->-> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: Empty The problem is decomposed in 3 subproblems. Problem 1.1: Reduction Pairs Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(0,y),x3) -> PLUS(y,x3) PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(plus(s(x),y),x3) -> PLUS(x,y) PLUS(s(x),y) -> PLUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Usable Equations: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> Usable Rules: plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [minus](X1,X2) = 0 [plus](X1,X2) = X1 + X2 [quot](X1,X2) = 0 [0] = 2 [s](X) = X [MINUS](X1,X2) = 0 [PLUS](X1,X2) = X1 + X2 [QUOT](X1,X2) = 0 Problem 1.1: SCC Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(plus(s(x),y),x3) -> PLUS(x,y) PLUS(s(x),y) -> PLUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(plus(s(x),y),x3) -> PLUS(x,y) PLUS(s(x),y) -> PLUS(x,y) -> FAxioms: plus(plus(x3,x4),x5) -> plus(x3,plus(x4,x5)) plus(x3,x4) -> plus(x4,x3) PLUS(plus(x3,x4),x5) -> PLUS(x3,plus(x4,x5)) PLUS(x3,x4) -> PLUS(x4,x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) ->->-> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) Problem 1.1: Reduction Pairs Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(plus(s(x),y),x3) -> PLUS(x,y) PLUS(s(x),y) -> PLUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Usable Equations: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> Usable Rules: plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [minus](X1,X2) = 0 [plus](X1,X2) = X1 + X2 + 2 [quot](X1,X2) = 0 [0] = 0 [s](X) = X + 2 [MINUS](X1,X2) = 0 [PLUS](X1,X2) = 2.X1 + 2.X2 [QUOT](X1,X2) = 0 Problem 1.1: SCC Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(s(x),y) -> PLUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(s(x),y) -> PLUS(x,y) -> FAxioms: plus(plus(x3,x4),x5) -> plus(x3,plus(x4,x5)) plus(x3,x4) -> plus(x4,x3) PLUS(plus(x3,x4),x5) -> PLUS(x3,plus(x4,x5)) PLUS(x3,x4) -> PLUS(x4,x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) ->->-> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) Problem 1.1: Reduction Pairs Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(s(x),y) -> PLUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Usable Equations: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> Usable Rules: plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) -> SRules: PLUS(plus(x3,x4),x5) -> PLUS(x3,x4) PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [minus](X1,X2) = 0 [plus](X1,X2) = X1 + X2 + 1 [quot](X1,X2) = 0 [0] = 0 [s](X) = X + 2 [MINUS](X1,X2) = 0 [PLUS](X1,X2) = 2.X1 + 2.X2 [QUOT](X1,X2) = 0 Problem 1.1: SCC Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(s(x),y) -> PLUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(s(x),y) -> PLUS(x,y) -> FAxioms: plus(plus(x3,x4),x5) -> plus(x3,plus(x4,x5)) plus(x3,x4) -> plus(x4,x3) PLUS(plus(x3,x4),x5) -> PLUS(x3,plus(x4,x5)) PLUS(x3,x4) -> PLUS(x4,x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) ->->-> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) Problem 1.1: Reduction Pairs Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) PLUS(s(x),y) -> PLUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Usable Equations: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> Usable Rules: plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) -> SRules: PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [minus](X1,X2) = 0 [plus](X1,X2) = X1 + X2 + 2 [quot](X1,X2) = 0 [0] = 0 [s](X) = X + 2 [MINUS](X1,X2) = 0 [PLUS](X1,X2) = 2.X1 + 2.X2 [QUOT](X1,X2) = 0 Problem 1.1: SCC Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) -> FAxioms: plus(plus(x3,x4),x5) -> plus(x3,plus(x4,x5)) plus(x3,x4) -> plus(x4,x3) PLUS(plus(x3,x4),x5) -> PLUS(x3,plus(x4,x5)) PLUS(x3,x4) -> PLUS(x4,x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) ->->-> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) Problem 1.1: Reduction Pairs Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: PLUS(plus(s(x),y),x3) -> PLUS(s(plus(x,y)),x3) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Usable Equations: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> Usable Rules: plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) -> SRules: PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [minus](X1,X2) = 0 [plus](X1,X2) = X1 + X2 + 2 [quot](X1,X2) = 0 [0] = 0 [s](X) = 2 [MINUS](X1,X2) = 0 [PLUS](X1,X2) = 2.X1 + 2.X2 [QUOT](X1,X2) = 0 Problem 1.1: SCC Processor: -> FAxioms: PLUS(plus(x3,x4),x5) = PLUS(x3,plus(x4,x5)) PLUS(x3,x4) = PLUS(x4,x3) -> Pairs: Empty -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: PLUS(x3,plus(x4,x5)) -> PLUS(x4,x5) ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.2: Subterm Processor: -> FAxioms: Empty -> Pairs: MINUS(minus(x,y),z) -> MINUS(x,plus(y,z)) MINUS(s(x),s(y)) -> MINUS(x,y) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: Empty ->Projection: pi(MINUS) = [1] Problem 1.2: SCC Processor: -> FAxioms: Empty -> Pairs: Empty -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: Empty ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.3: Reduction Pairs Processor: -> FAxioms: Empty -> Pairs: QUOT(s(x),s(y)) -> QUOT(minus(x,y),s(y)) -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Usable Equations: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> Usable Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) -> SRules: Empty ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [minus](X1,X2) = X1 + 1 [plus](X1,X2) = X1 + X2 + 2 [quot](X1,X2) = 0 [0] = 0 [s](X) = X + 2 [MINUS](X1,X2) = 0 [PLUS](X1,X2) = 0 [QUOT](X1,X2) = 2.X1 Problem 1.3: SCC Processor: -> FAxioms: Empty -> Pairs: Empty -> EAxioms: plus(plus(x3,x4),x5) = plus(x3,plus(x4,x5)) plus(x3,x4) = plus(x4,x3) -> Rules: minus(minus(x,y),z) -> minus(x,plus(y,z)) minus(s(x),s(y)) -> minus(x,y) minus(x,0) -> x plus(0,y) -> y plus(s(x),y) -> s(plus(x,y)) quot(0,s(y)) -> 0 quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) -> SRules: Empty ->Strongly Connected Components: There is no strongly connected component The problem is finite.