YES Problem: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Proof: DP Processor: DPs: minus#(s(x),s(y)) -> minus#(x,y) quot#(s(x),s(y)) -> minus#(x,y) quot#(s(x),s(y)) -> quot#(minus(x,y),s(y)) plus#(s(x),s(y)) -> id#(y) plus#(s(x),s(y)) -> id#(x) plus#(s(x),s(y)) -> not#(gt(x,y)) plus#(s(x),s(y)) -> if#(not(gt(x,y)),id(x),id(y)) plus#(s(x),s(y)) -> gt#(x,y) plus#(s(x),s(y)) -> if#(gt(x,y),x,y) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),x) -> id#(x) plus#(s(x),x) -> gt#(x,x) plus#(s(x),x) -> if#(gt(x,x),id(x),id(x)) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) plus#(id(x),s(y)) -> gt#(s(y),y) plus#(id(x),s(y)) -> if#(gt(s(y),y),y,s(y)) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) not#(x) -> if#(x,false(),true()) gt#(s(x),s(y)) -> gt#(x,y) TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) TDG Processor: DPs: minus#(s(x),s(y)) -> minus#(x,y) quot#(s(x),s(y)) -> minus#(x,y) quot#(s(x),s(y)) -> quot#(minus(x,y),s(y)) plus#(s(x),s(y)) -> id#(y) plus#(s(x),s(y)) -> id#(x) plus#(s(x),s(y)) -> not#(gt(x,y)) plus#(s(x),s(y)) -> if#(not(gt(x,y)),id(x),id(y)) plus#(s(x),s(y)) -> gt#(x,y) plus#(s(x),s(y)) -> if#(gt(x,y),x,y) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),x) -> id#(x) plus#(s(x),x) -> gt#(x,x) plus#(s(x),x) -> if#(gt(x,x),id(x),id(x)) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) plus#(id(x),s(y)) -> gt#(s(y),y) plus#(id(x),s(y)) -> if#(gt(s(y),y),y,s(y)) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) not#(x) -> if#(x,false(),true()) gt#(s(x),s(y)) -> gt#(x,y) TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) graph: gt#(s(x),s(y)) -> gt#(x,y) -> gt#(s(x),s(y)) -> gt#(x,y) plus#(id(x),s(y)) -> gt#(s(y),y) -> gt#(s(x),s(y)) -> gt#(x,y) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(id(x),s(y)) -> if#(gt(s(y),y),y,s(y)) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(id(x),s(y)) -> gt#(s(y),y) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),x) -> if#(gt(x,x),id(x),id(x)) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),x) -> gt#(x,x) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),x) -> id#(x) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),s(y)) -> if#(gt(x,y),x,y) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),s(y)) -> gt#(x,y) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),s(y)) -> if#(not(gt(x,y)),id(x),id(y)) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),s(y)) -> not#(gt(x,y)) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),s(y)) -> id#(x) plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) -> plus#(s(x),s(y)) -> id#(y) plus#(s(x),s(y)) -> gt#(x,y) -> gt#(s(x),s(y)) -> gt#(x,y) plus#(s(x),s(y)) -> not#(gt(x,y)) -> not#(x) -> if#(x,false(),true()) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(id(x),s(y)) -> if#(gt(s(y),y),y,s(y)) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(id(x),s(y)) -> gt#(s(y),y) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),x) -> if#(gt(x,x),id(x),id(x)) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),x) -> gt#(x,x) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),x) -> id#(x) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),s(y)) -> if#(gt(x,y),x,y) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),s(y)) -> gt#(x,y) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),s(y)) -> if#(not(gt(x,y)),id(x),id(y)) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),s(y)) -> not#(gt(x,y)) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),s(y)) -> id#(x) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) -> plus#(s(x),s(y)) -> id#(y) plus#(s(x),x) -> gt#(x,x) -> gt#(s(x),s(y)) -> gt#(x,y) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(id(x),s(y)) -> if#(gt(s(y),y),y,s(y)) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(id(x),s(y)) -> gt#(s(y),y) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),x) -> if#(gt(x,x),id(x),id(x)) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),x) -> gt#(x,x) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),x) -> id#(x) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),s(y)) -> if#(gt(x,y),x,y) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),s(y)) -> gt#(x,y) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),s(y)) -> if#(not(gt(x,y)),id(x),id(y)) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),s(y)) -> not#(gt(x,y)) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),s(y)) -> id#(x) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) -> plus#(s(x),s(y)) -> id#(y) quot#(s(x),s(y)) -> quot#(minus(x,y),s(y)) -> quot#(s(x),s(y)) -> quot#(minus(x,y),s(y)) quot#(s(x),s(y)) -> quot#(minus(x,y),s(y)) -> quot#(s(x),s(y)) -> minus#(x,y) quot#(s(x),s(y)) -> minus#(x,y) -> minus#(s(x),s(y)) -> minus#(x,y) minus#(s(x),s(y)) -> minus#(x,y) -> minus#(s(x),s(y)) -> minus#(x,y) SCC Processor: #sccs: 4 #rules: 6 #arcs: 51/361 DPs: quot#(s(x),s(y)) -> quot#(minus(x,y),s(y)) TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Subterm Criterion Processor: simple projection: pi(minus) = 0 pi(quot#) = 0 problem: DPs: TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Qed DPs: minus#(s(x),s(y)) -> minus#(x,y) TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Subterm Criterion Processor: simple projection: pi(minus#) = 0 problem: DPs: TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Qed DPs: plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Usable Rule Processor: DPs: plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) TRS: gt(s(x),zero()) -> true() gt(s(x),s(y)) -> gt(x,y) gt(zero(),y) -> false() if(true(),x,y) -> x if(false(),x,y) -> y id(x) -> x not(x) -> if(x,false(),true()) Arctic Interpretation Processor: dimension: 1 usable rules: if(true(),x,y) -> x if(false(),x,y) -> y id(x) -> x interpretation: [plus#](x0, x1) = x0 + x1, [false] = 0, [true] = 0, [zero] = 0, [id](x0) = x0, [not](x0) = -2x0 + 0, [if](x0, x1, x2) = x1 + x2, [gt](x0, x1) = 2x0 + 1x1 + 2, [s](x0) = 1x0 + 2 orientation: plus#(id(x),s(y)) = x + 1y + 2 >= x + 1y + 2 = plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),s(y)) = 1x + 1y + 2 >= x + y = plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),x) = 1x + 2 >= 1x + 2 = plus#(if(gt(x,x),id(x),id(x)),s(x)) gt(s(x),zero()) = 3x + 4 >= 0 = true() gt(s(x),s(y)) = 3x + 2y + 4 >= 2x + 1y + 2 = gt(x,y) gt(zero(),y) = 1y + 2 >= 0 = false() if(true(),x,y) = x + y >= x = x if(false(),x,y) = x + y >= y = y id(x) = x >= x = x not(x) = -2x + 0 >= 0 = if(x,false(),true()) problem: DPs: plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) TRS: gt(s(x),zero()) -> true() gt(s(x),s(y)) -> gt(x,y) gt(zero(),y) -> false() if(true(),x,y) -> x if(false(),x,y) -> y id(x) -> x not(x) -> if(x,false(),true()) Restore Modifier: DPs: plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Subterm Criterion Processor: simple projection: pi(if) = [1,2] pi(id) = [0,0] pi(plus#) = [0,0] problem: DPs: TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Qed DPs: gt#(s(x),s(y)) -> gt#(x,y) TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Subterm Criterion Processor: simple projection: pi(gt#) = 0 problem: DPs: TRS: minus(x,0()) -> x minus(s(x),s(y)) -> minus(x,y) quot(0(),s(y)) -> 0() quot(s(x),s(y)) -> s(quot(minus(x,y),s(y))) plus(s(x),s(y)) -> s(s(plus(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))))) plus(s(x),x) -> plus(if(gt(x,x),id(x),id(x)),s(x)) plus(zero(),y) -> y plus(id(x),s(y)) -> s(plus(x,if(gt(s(y),y),y,s(y)))) id(x) -> x if(true(),x,y) -> x if(false(),x,y) -> y not(x) -> if(x,false(),true()) gt(s(x),zero()) -> true() gt(zero(),y) -> false() gt(s(x),s(y)) -> gt(x,y) Qed