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Proof step 9 from proof validrefval-union (conclusion)

⊦ validrefval(str, val, ty, st) → validrefval(str, val, ty, st0 ∪ st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
validrefval(str, val, ty, st) ⊦ validrefval(str, val, ty, st0 ∪ st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]