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Proof step 74 from proof junkrefs-put-notin-butlast (previous step)

r -- fs ' ∈ st, okval(st[r -- fs '], fs .type), okval(val, fs .type), r ∈ st ⊦ junkrefs(str, refs + r ', ty, st[r -- fs ', val]) ↔ junkrefs(str, refs + r ', ty, st), fs ' = _type, fs ' = _length, r ∈ refs

User applied rule structural induction

And obtained the following new goals

Proof step 10:
r -- fs ' ∈ st, okval(st[r -- fs '], fs .type), okval(val, fs .type), r ∈ st ⊦ junkrefs(str, [] + r ', ty, st[r -- fs ', val]) ↔ junkrefs(str, [] + r ', ty, st), fs ' = _type, fs ' = _length, r ∈ []
Proof step 73:
∀ r, fs, st, val, str, ty. r -- fs ' ∈ st ∧ okval(st[r -- fs '], fs .type) ∧ okval(val, fs .type) ∧ r ∈ st → (junkrefs(str, acc + r ', ty, st[r -- fs ', val]) ↔ junkrefs(str, acc + r ', ty, st)) ∨ fs ' = _type ∨ fs ' = _length ∨ r ∈ acc, r -- fs ' ∈ st, okval(st[r -- fs '], fs .type), okval(val, fs .type), r ∈ st ⊦ junkrefs(str, (r0 + acc) + r ', ty, st[r -- fs ', val]) ↔ junkrefs(str, (r0 + acc) + r ', ty, st), fs ' = _type, fs ' = _length, r ∈ r0 + acc

Rule argument

[VARWITHVARSEQSARG : refs, ()]

Additional information

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