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Proof step 13 from proof unchanged-validref (previous step)

unchanged(str, r, st, st1), validref(str, r, ty, st) ⊦ validref(str, r, ty, st1)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)
Proof step 12:
unchanged(str, r, st, st1), validref(str, r, ty, st) ⊦ r = jvmref ∨ st1[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st1)

Rule argument

[x0lemmaarg: spec-name: junkrefs instance-name: lemma-name: validref-def antecedent: succedent: validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st) substlist: [st, ty, r, str] → [st1, ty, r, str] add preconditions?: F is rewrite lemma?: T current spec?: F rotate lemma?: F replace all?: T paths: ((1, 0, 0)) dummy: () ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st1, ty, r, str)]]