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Proof step 75 from proof junkrefs-put-notin-butlast (conclusion)

⊦ ¬ r ∈ refs ∧ r -- fs ' ∈ st ∧ oktype(st[r -- fs '], fs .type, st) ∧ oktype(val, fs .type, st) ∧ fs ' ≠ _length ∧ fs ' ≠ _type → (junkrefs(str, refs + r ', ty, st[r -- fs ', val]) ↔ junkrefs(str, refs + r ', ty, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 74:
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

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st], [CSIMPSEQ : ⊦ oktype(val, ty, st) ↔ okval(val, ty)])]]