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Proof step 40 from proof junkref-primarray-lvl (previous step)

st[r -- _type] = typeval(mkarraytype(ty)), is_primtype(ty) ⊦ (∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[r -- _type] .type, st)) ↔ junkref(str1, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 39:
st[r -- _type] = typeval(mkarraytype(ty)), is_primtype(ty) ⊦ (∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)) ↔ junkref(str1, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]