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Proof step 19 from proof junkref-primarray-lvl (previous step)

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

User applied rule exists left

And obtained the following new goals

Proof step 18:
refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st), st[r -- _type] = typeval(mkarraytype(ty)), is_primtype(ty) ⊦ ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str1, refs, st[refs .first -- _type] .type, st)

Rule argument

[fmapos-arg: pos: left 1]

Additional information

[[CONCRETESIMPRULES : ()]]