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Proof step 4 from proof pathex-levelsubset-01 (previous step)

level⊆(str, str0), validref(str, r0, ty, st), is_valid_ref(str0, r0, st) ⊦ r0 = jvmref, is_valid_ref(str, r0, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[x0lemmaarg: spec-name: junkrefs instance-name: lemma-name: validref-is-junk antecedent: succedent: r ≠ jvmref ∧ ( ¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty) → ¬ validref(str, r, ty, st) substlist: [st, ty, r, str] → [st, ty, r0, str] add preconditions?: F is rewrite lemma?: T current spec?: F rotate lemma?: F replace all?: T paths: ((0, 0, 1)) dummy: () ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, ty, r0, str)]]