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Proof step 40 from proof legal-noncylic-equiv-reaches-null (previous step)

H[r0] .nxt = null, reachable-n(H, n, r, r0), legal(H), r ∈ H, r0 ∈ H, ∃ r0. reachable-n(H, n + 1, r, r0) ⊦ r = null

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 39:
H[r0] .nxt = null, reachable-n(H, n + 1, r, r1), r0 ∈ H, r ∈ H, legal(H), reachable-n(H, n, r, r0) ⊦ r = null

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]