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Proof step 7 from proof junkref-put-array-norefval (previous step)

okval(val, st[r1 -- _type] .type .type), junkrefs(str, r ' + refs0, st[r -- _type] .type, st[r1 -- i ', val]) ⊦ is_referencevalue(val), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[r -- _type] .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
okval(val, st[r1 -- _type] .type .type), junkrefs(str, r ' + refs0, st[r -- _type] .type, st[r1 -- i ', val]) ⊦ is_referencevalue(val), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]