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Proof step 7 from proof reach-n-next-legal (previous step)

r ∈ H, legal(H), reachable-n(H, n, r, r0) ⊦ H[r0] .nxt = null, r = null, r0 ≠ null ∧ r0 ∈ H

User applied rule constructor cut

And obtained the following new goals

Proof step 6:
n = m +1, r ∈ H, legal(H), reachable-n(H, n, r, r0) ⊦ H[r0] .nxt = null, r = null, r0 ≠ null ∧ r0 ∈ H

Rule argument

[var-arg: n]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : nat generated by 0, +1;], [CSIMPSEQ : ⊦ reachable-n(H, 0, r, r0) ↔ r = r0])]]