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Proof step 7 from proof junkref-put-badarrayindex (previous step)

∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, (st[r0 -- i ', val][r -- _type]) .type, st[r0 -- i ', val]) ⊦ junkref(str, r, st), is_array(str, r0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
junkrefs(str, refs, st[refs .first -- _type] .type, st[r0 -- i ', val]) ⊦ refs = [], junkref(str, refs .first, st), is_array(str, r0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (st[r -- i ', val][r0 -- _type]) = st[r0 -- _type]])]]