MAYBE

Proof:
ConCon could not decide confluence of the system.
\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.
cons($3, y') = cons($11, $5) <= sub($10, $11) = $8, ssp'($12, $8) = $5, get($12) = tp2($3, $4), sub($10, $3) = $9, ssp'(cons($11, $4), $9) = y':
For all conditions c 'tcap(c.lhs)' is unifiable with c.rhs.