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Proof step 8 from proof junkref-put-badarrayfield (previous step)

is_arraytype(st[r0 -- _type] .type), junkrefs(str, r ' + refs0, st[r -- _type] .type, st[r0 -- fs ', val]) ⊦ fs ' = _type, fs ' = _length, junkref(str, r, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ junkref(str, r, st) ↔ (∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[r -- _type] .type, st))
Proof step 7:
is_arraytype(st[r0 -- _type] .type), junkrefs(str, r ' + refs0, st[r -- _type] .type, st[r0 -- fs ', val]) ⊦ fs ' = _type, fs ' = _length, ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[r -- _type] .type, st)

Rule argument

[crewrite-arg: junkref-def, F, [st, r, str] → [st, r, str]]

Additional information

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