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Proof step 6 from proof validrefkeynotnull-validrefnotnull (conclusion)

⊦ validrefkeynotnull(str, rk, ty1, st) → validrefnotnull(str, st[rk] .refval, ty1, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
validrefkeynotnull(str, rk, ty1, st) ⊦ validrefnotnull(str, st[rk] .refval, ty1, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]