ceta_eq: termination proof not accepted 1: error below switch to dependency pairs 1.1: error when applying the reduction pair processor with usable rules to remove from the DP problem pairs: implies#(not(x), or(y, z)) -> implies#(y, or(x, z)) implies#(x, or(y, z)) -> implies#(x, z) rules: implies(not(x), y) -> or(x, y) implies(not(x), or(y, z)) -> implies(y, or(x, z)) implies(x, or(y, z)) -> or(y, implies(x, z)) the pairs implies#(x, or(y, z)) -> implies#(x, z) could not apply the generic root reduction pair processor with the following SCNP-version with mu = MS and the level mapping defined by pi(implies#) = [(epsilon,0),(2,0)] Argument Filter: pi(implies#/2) = [] pi(not/1) = [1] pi(or/2) = [2] RPO with the following precedence precedence(or[2]) = 0 precedence(not[1]) = 1 precedence(implies#[2]) = 2 precedence(_) = 0 and the following status status(or[2]) = lex status(not[1]) = lex status(implies#[2]) = lex status(_) = lex problem when orienting DPs cannot orient pair implies#(not(x), or(y, z)) -> implies#(y, or(x, z)) weakly: [(implies#(not(x), or(y, z)),0),(or(y, z),0)] >=mu [(implies#(y, or(x, z)),0),(or(x, z),0)] could not be ensured