ack(0, y) → s(y)
ack(s(x), 0) → ack(x, s(0))
ack(s(x), s(y)) → ack(x, ack(s(x), y))
↳ QTRS
↳ DependencyPairsProof
ack(0, y) → s(y)
ack(s(x), 0) → ack(x, s(0))
ack(s(x), s(y)) → ack(x, ack(s(x), y))
ACK(s(x), 0) → ACK(x, s(0))
ACK(s(x), s(y)) → ACK(s(x), y)
ACK(s(x), s(y)) → ACK(x, ack(s(x), y))
ack(0, y) → s(y)
ack(s(x), 0) → ack(x, s(0))
ack(s(x), s(y)) → ack(x, ack(s(x), y))
↳ QTRS
↳ DependencyPairsProof
↳ QDP
↳ QDPOrderProof
ACK(s(x), 0) → ACK(x, s(0))
ACK(s(x), s(y)) → ACK(s(x), y)
ACK(s(x), s(y)) → ACK(x, ack(s(x), y))
ack(0, y) → s(y)
ack(s(x), 0) → ack(x, s(0))
ack(s(x), s(y)) → ack(x, ack(s(x), y))
The following pairs can be oriented strictly and are deleted.
The remaining pairs can at least be oriented weakly.
ACK(s(x), 0) → ACK(x, s(0))
ACK(s(x), s(y)) → ACK(x, ack(s(x), y))
Used ordering: Polynomial interpretation [25,35]:
ACK(s(x), s(y)) → ACK(s(x), y)
The value of delta used in the strict ordering is 1/2.
POL(ACK(x1, x2)) = (2)x_1
POL(s(x1)) = 1/4 + x_1
POL(0) = 0
POL(ack(x1, x2)) = 0
↳ QTRS
↳ DependencyPairsProof
↳ QDP
↳ QDPOrderProof
↳ QDP
↳ QDPOrderProof
ACK(s(x), s(y)) → ACK(s(x), y)
ack(0, y) → s(y)
ack(s(x), 0) → ack(x, s(0))
ack(s(x), s(y)) → ack(x, ack(s(x), y))
The following pairs can be oriented strictly and are deleted.
The remaining pairs can at least be oriented weakly.
ACK(s(x), s(y)) → ACK(s(x), y)
The value of delta used in the strict ordering is 1/16.
POL(ACK(x1, x2)) = (1/4)x_2
POL(s(x1)) = 1/4 + (2)x_1
↳ QTRS
↳ DependencyPairsProof
↳ QDP
↳ QDPOrderProof
↳ QDP
↳ QDPOrderProof
↳ QDP
↳ PisEmptyProof
ack(0, y) → s(y)
ack(s(x), 0) → ack(x, s(0))
ack(s(x), s(y)) → ack(x, ack(s(x), y))