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Proof step 40 from proof validrefs-delete (previous step)

validrefs(str, r0 ' + acc, ty, st -- r), ∀ str, ty, st, r. validrefs(str, acc, ty, st -- r) → validrefs(str, acc, ty, st) ⊦ r0 = jvmref, validrefs(str, r0 ' + acc, ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty) → ¬ validrefs(str, r ' + refs, ty, st)
Proof step 39:
¬ (r0 ≠ jvmref ∧ (¬ is_valid_ref(str, r0, st -- r) ∨ ¬ (st -- r)[r0 -- _type] .type ≤ ty)), validrefs(str, r0 ' + acc, ty, st -- r), ∀ str, ty, st, r. validrefs(str, acc, ty, st -- r) → validrefs(str, acc, ty, st) ⊦ r0 = jvmref, validrefs(str, r0 ' + acc, ty, st)

Rule argument

[crewrite-arg: validrefs-is-junk , F , [st, ty, refs, r, str] → [st -- r, ty, acc, r0, str] ]

Additional information

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