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Proof step 63 from proof validrefs-put-notin (previous step)

⊦ validrefs(str, refs, ty, st[r -- sk, val]) ↔ validrefs(str, refs, ty, st), r ∈ refs

User applied rule structural induction

And obtained the following new goals

Proof step 1:
⊦ validrefs(str, [], ty, st)
Proof step 62:
∀ str, ty, st, r, sk, val. (validrefs(str, acc, ty, st[r -- sk, val]) ↔ validrefs(str, acc, ty, st)) ∨ r ∈ acc ⊦ validrefs(str, r0 + acc, ty, st[r -- sk, val]) ↔ validrefs(str, r0 + acc, ty, st), r ∈ r0 + acc

Rule argument

[VARWITHVARSEQSARG : refs, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : references generated by [], +;])]]