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Proof step 6 from proof junkref-put-ba (previous step)

st[r0 -- _type] = typeval(mkarraytype(byte_type)), is_array(r0, st), junkrefs(str, r ' + refs0, st[r -- _type] .type, st[r1 -- mkfs(class, mkarraytype(byte_type), fieldvar) ', refval(r0)]) ⊦ ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

User applied rule exists right

And obtained the following new goals

Proof step 5:
st[r0 -- _type] = typeval(mkarraytype(byte_type)), is_array(r0, st), junkrefs(str, r ' + refs0, st[r -- _type] .type, st[r1 -- mkfs(class, mkarraytype(byte_type), fieldvar) ', refval(r0)]) ⊦ r ' + refs0 ≠ [] ∧ (r ' + refs0) .first = r ∧ junkrefs(str, r ' + refs0, st[(r ' + refs0) .first -- _type] .type, st), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Rule argument

[EXRARG : pos: right 1, [extquanttermlist: (r ' + refs0) abort:F , discard:F , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r ' + refs0)]]