YES(O(1),O(n^2)) We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^2)). Strict Trs: { *(x, +(y, z)) -> +(*(x, y), *(x, z)) } Obligation: innermost runtime complexity Answer: YES(O(1),O(n^2)) We use the processor 'custom shape polynomial interpretation' to orient following rules strictly. Trs: { *(x, +(y, z)) -> +(*(x, y), *(x, z)) } The induced complexity on above rules (modulo remaining rules) is YES(?,O(n^2)) . These rules are moved into the corresponding weak component(s). Sub-proof: ---------- TcT has computed the following constructor-restricted polynomial interpretation. [*](x1, x2) = 3*x1 + 3*x1*x2 + 3*x2 + x2^2 [+](x1, x2) = 1 + x1 + x2 This order satisfies the following ordering constraints. [*(x, +(y, z))] = 6*x + 3*x*y + 3*x*z + 4 + 5*y + 5*z + y^2 + y*z + z*y + z^2 > 1 + 6*x + 3*x*y + 3*y + y^2 + 3*x*z + 3*z + z^2 = [+(*(x, y), *(x, z))] We return to the main proof. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Weak Trs: { *(x, +(y, z)) -> +(*(x, y), *(x, z)) } Obligation: innermost runtime complexity Answer: YES(O(1),O(1)) Empty rules are trivially bounded Hurray, we answered YES(O(1),O(n^2))