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Proof step 66 from proof validrefs-trans-01 (previous step)

validrefs(str, refs, ty, st), validrefs(str, refs .last ' + refs1, ty0, st) ⊦ refs = [], validrefs(str, refs + refs1, ty, st)

User applied rule structural induction

And obtained the following new goals

Proof step 65:
∀ str, ty, st, refs1, ty0. validrefs(str, acc, ty, st) ∧ validrefs(str, acc .last ' + refs1, ty0, st) → acc = [] ∨ validrefs(str, acc + refs1, ty, st), validrefs(str, r + acc, ty, st), validrefs(str, (r + acc) .last ' + refs1, ty0, st) ⊦ r + acc = [], validrefs(str, (r + acc) + refs1, ty, st)

Rule argument

[VARWITHVARSEQSARG : refs, ()]

Additional information

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