/export/starexec/sandbox2/solver/bin/starexec_run_ttt2 /export/starexec/sandbox2/benchmark/theBenchmark.xml /export/starexec/sandbox2/output/output_files -------------------------------------------------------------------------------- YES Problem: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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: times#(x,s(y)) -> times#(x,y) times#(x,s(y)) -> plus#(times(x,y),x) 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: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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: times#(x,s(y)) -> times#(x,y) times#(x,s(y)) -> plus#(times(x,y),x) 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: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(id(x),s(y)) -> if#(gt(s(y),y),y,s(y)) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(id(x),s(y)) -> gt#(s(y),y) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),x) -> plus#(if(gt(x,x),id(x),id(x)),s(x)) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),x) -> if#(gt(x,x),id(x),id(x)) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),x) -> gt#(x,x) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),x) -> id#(x) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),s(y)) -> if#(gt(x,y),x,y) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),s(y)) -> gt#(x,y) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),s(y)) -> if#(not(gt(x,y)),id(x),id(y)) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),s(y)) -> not#(gt(x,y)) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),s(y)) -> id#(x) times#(x,s(y)) -> plus#(times(x,y),x) -> plus#(s(x),s(y)) -> id#(y) times#(x,s(y)) -> times#(x,y) -> times#(x,s(y)) -> plus#(times(x,y),x) times#(x,s(y)) -> times#(x,y) -> times#(x,s(y)) -> times#(x,y) SCC Processor: #sccs: 3 #rules: 5 #arcs: 63/324 DPs: times#(x,s(y)) -> times#(x,y) TRS: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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(times#) = 1 problem: DPs: TRS: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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: 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()) interpretation: [gt](x0, x1) = 2x1 + 1, [zero] = 2, [if](x0, x1, x2) = x0 + x1 + x2 + 0, [false] = 0, [id](x0) = x0 + 1, [plus#](x0, x1) = 2x0 + x1 + 0, [true] = 0, [not](x0) = 2x0 + 1, [s](x0) = 4x0 + 2 orientation: plus#(id(x),s(y)) = 2x + 4y + 3 >= 2x + 4y + 2 = plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),s(y)) = 6x + 4y + 4 >= 2x + 4y + 3 = plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) plus#(s(x),x) = 6x + 4 >= 4x + 3 = plus#(if(gt(x,x),id(x),id(x)),s(x)) gt(s(x),zero()) = 4 >= 0 = true() gt(s(x),s(y)) = 6y + 4 >= 2y + 1 = gt(x,y) gt(zero(),y) = 2y + 1 >= 0 = false() if(true(),x,y) = x + y + 0 >= x = x if(false(),x,y) = x + y + 0 >= y = y id(x) = x + 1 >= x = x not(x) = 2x + 1 >= x + 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),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) 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),s(y)) -> plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) TRS: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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))) 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: [gt](x0, x1) = x0 + 4x1 + 3, [zero] = 1, [if](x0, x1, x2) = x1 + x2, [false] = 1, [id](x0) = x0, [plus#](x0, x1) = x0 + x1, [true] = 5, [not](x0) = 2, [s](x0) = 1x0 orientation: plus#(id(x),s(y)) = x + 1y >= x + 1y = plus#(x,if(gt(s(y),y),y,s(y))) plus#(s(x),s(y)) = 1x + 1y >= x + y = plus#(if(gt(x,y),x,y),if(not(gt(x,y)),id(x),id(y))) gt(s(x),zero()) = 1x + 5 >= 5 = true() gt(s(x),s(y)) = 1x + 5y + 3 >= x + 4y + 3 = gt(x,y) gt(zero(),y) = 4y + 3 >= 1 = false() if(true(),x,y) = x + y >= x = x if(false(),x,y) = x + y >= y = y id(x) = x >= x = x not(x) = 2 >= 5 = if(x,false(),true()) problem: DPs: plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) 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))) TRS: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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) Size-Change Termination Processor: DPs: TRS: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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) The DP: plus#(id(x),s(y)) -> plus#(x,if(gt(s(y),y),y,s(y))) has the edges: 0 > 0 Qed DPs: gt#(s(x),s(y)) -> gt#(x,y) TRS: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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: times(x,0()) -> 0() times(x,s(y)) -> plus(times(x,y),x) 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