ceta_eq: termination proof not accepted 1: error below switch to dependency pairs 1.1: error below the dependency graph processor 1.1.1: error when applying the reduction pair processor with usable rules to remove from the DP problem pairs: quot#(s(X), s(Y)) -> quot#(minus(X, Y), s(Y)) rules: ifMinus(true, s(X), Y) -> 0 ifMinus(false, s(X), Y) -> s(minus(X, Y)) le(0, Y) -> true le(s(X), 0) -> false le(s(X), s(Y)) -> le(X, Y) minus(0, Y) -> 0 minus(s(X), Y) -> ifMinus(le(s(X), Y), s(X), Y) quot(0, s(Y)) -> 0 quot(s(X), s(Y)) -> s(quot(minus(X, Y), s(Y))) the pairs quot#(s(X), s(Y)) -> quot#(minus(X, Y), s(Y)) could not apply the generic root reduction pair processor with the following SCNP-version with mu = MS and the level mapping defined by pi(quot#) = [(epsilon,0),(1,0),(2,0)] Argument Filter: pi(quot#/2) = [] pi(s/1) = [1] pi(minus/2) = 1 pi(0/0) = [] pi(ifMinus/3) = 2 pi(le/2) = 2 pi(false/0) = [] pi(true/0) = [] RPO with the following precedence precedence(quot#[2]) = 2 precedence(s[1]) = 1 precedence(0[0]) = 1 precedence(false[0]) = 3 precedence(true[0]) = 0 precedence(_) = 0 and the following status status(quot#[2]) = lex status(s[1]) = lex status(0[0]) = lex status(false[0]) = lex status(true[0]) = lex status(_) = lex problem when orienting DPs cannot orient pair quot#(s(X), s(Y)) -> quot#(minus(X, Y), s(Y)) strictly: [(quot#(s(X), s(Y)),0),(s(X),0),(s(Y),0)] >mu [(quot#(minus(X, Y), s(Y)),0),(minus(X, Y),0),(s(Y),0)] could not be ensured