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Proof step 7 from proof validrefs-append (previous step)

validrefs(str, r ' + refs0, ty0, st), validrefs(str, r ', ty, st) ⊦ validrefs(str, r ' + refs0, ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validrefs(str, r ', ty, st) ↔ r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty
Proof step 6:
validrefs(str, r ' + refs0, ty0, st), r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty ⊦ validrefs(str, r ' + refs0, ty, st)

Rule argument

[crewrite-arg: validrefs-one, F, [st, ty, r, str] → [st, ty, r, str]]

Additional information

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