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Proof step 21 from proof junkref-put-other-fieldclass (previous step)

junkref(str, r, st[r0 -- fs ', val]) ⊦ fs ' = _type, junkref(str, r, st), contains(str, st[r -- _type] .type, fs)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ ¬ path∃(str, r, r0, st) ∧ ¬ junkref(str, r, st) ∧ sk ≠ _type → ¬ junkref(str, r, st[r0 -- sk, val])
Proof step 20:
¬ (¬ path∃(str, r, r0, st) ∧ ¬ junkref(str, r, st) ∧ fs ' ≠ _type), junkref(str, r, st[r0 -- fs ', val]) ⊦ fs ' = _type, junkref(str, r, st), contains(str, st[r -- _type] .type, fs)

Rule argument

[speclemmaarg: , ¬ path∃(str, r, r0, st) ∧ ¬ junkref(str, r, st) ∧ sk ≠ _type → ¬ junkref(str, r, st[r0 -- sk, val]) ,[val, sk, r0, st, r, str] → [val, fs ', r0, st, r, str] ,F ,compatible , ,junkref-put-nopathex-01 ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (val, fs ', r0, st, r, str)]]