MAYBE

Proof:
ConCon could not decide confluence of the system.
\cite{ALS94}, Theorem 4.1 does not apply.
This system may be strongly deterministic or not.
\cite{GNG13}, Theorem 9 does not apply.
\cite{SMI95}, Corollary 4.7 or 5.3 do not apply.
Some critical pairs are not trivial and ConCon could not decide whether those all are infeasible.
mod(m(x, y), s(y)) = s(x) <= lte(y, x) = false, lte(y, x) = true:
For all conditions c 'tcap(c.lhs)' is unifiable with c.rhs.