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Proof step 6 from proof validrefs-trans-01 (previous step)

validrefs(str, r ' + refs1, ty0, st), validrefs(str, r ' + refs1, st[r -- _type] .type, st), is_valid_ref(str, r, st), st[r -- _type] .type ≤ ty ⊦ r = jvmref, validrefs(str, r ' + refs1, ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ validrefs(str, refs, ty, st) ∧ ty ≤ ty0 → validrefs(str, refs, ty0, st)

Rule argument

[crewrite-arg: validrefs-superclass , F , [str, refs, ty, st, ty0] → [str, r ' + refs1, st[r -- _type] .type, st, ty] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (str, r ' + refs1, st[r -- _type] .type, st, ty)]]