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Proof step 9 from proof junkref-put-norefval (previous step)

sk = fs ', is_fskey(sk), okval(val, fs .type), junkrefs(str, r ' + refs1, (st[r1 -- sk, val][r -- _type]) .type, st[r1 -- sk, val]) ⊦ sk = _length, fs .type = void_type, is_referencevalue(val), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
okval(val, fs .type), junkrefs(str, r ' + refs1, (st[r1 -- fs ', val][r -- _type]) .type, st[r1 -- fs ', val]) ⊦ fs ' = _length, fs .type = void_type, is_referencevalue(val), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_fskey(fs ')])]]