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Proof step 59 from proof validrefs-put-badarrayfield (conclusion)

⊦ ¬ validrefs(str, refs, ty, st) ∧ ¬ junkref(str, refs .first, st) ∧ fs ' ≠ _type ∧ is_arraytype(st[r0 -- _type] .type) ∧ fs ' ≠ _length ∧ refs ≠ [] ∧ ¬ dups(refs .butlast) → ¬ validrefs(str, refs, ty, st[r0 -- fs ', val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 58:
is_arraytype(st[r0 -- _type] .type), validrefs(str, refs, ty, st[r0 -- fs ', val]) ⊦ fs ' = _type, fs ' = _length, refs = [], validrefs(str, refs, ty, st), junkref(str, refs .first, st), dups(refs .butlast)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]