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Proof step 8 from proof validval-field-norefval (conclusion)

⊦ ¬ is_referencevalue(val) → (validval(str, r -- fs ', val, st) ↔ okval(val, fs .type) ∧ fs ' ≠ _length)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
⊦ validval(str, r -- fs ', val, st) ↔ okval(val, fs .type) ∧ fs ' ≠ _length, is_referencevalue(val)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]