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Proof step 13 from proof validfield-levelsubset (previous step)

level⊆(str, str0), goodfieldandtype(r, sk, st) ∧ type∃(str, sk .fs .type) ∧ sk .fs .type ≠ void_type ∧ (is_reftype(sk .fs .type) → validrefval(str, st[r -- sk], sk .fs .type, st)) ⊦ validfield(str0, r, sk, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 12:
type∃(str, sk .fs .type), goodfieldandtype(r, sk, st), level⊆(str, str0), is_reftype(sk .fs .type) → validrefval(str, st[r -- sk], sk .fs .type, st) ⊦ sk .fs .type = void_type, validfield(str0, r, sk, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]