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Proof step 13 from proof validval-putrkvs (previous step)

validvals(str, rkvs, st), okval(val, ty) ∧ (is_referencevalue(val) → validrefval(str, val, ty, st)) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, okval(val, ty) ∧ (is_referencevalue(val) → validrefval(str, val, ty, st[rkvs]))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 12:
is_referencevalue(val), validvals(str, rkvs, st), is_reftype(ty), validrefval(str, val, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, validrefval(str, val, ty, st[rkvs])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_referencevalue(val) → ( okval(val, ty) ↔ ty = void_type ∨ is_reftype(ty))])]]