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Proof step 5 from proof unchanged-field-lookup (previous step)

is_obj(str, r, st), fs ' ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1), is_classtype(st[r -- _type] .type) ⊦ r = jvmref, st[r -- fs '] = st1[r -- fs '], unchangedNorec(r, st, st1)

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 4:
⊦ ¬ unchangedNorec(r, st, st0) ∧ is_obj(str, r, st) → ¬ unchanged(str, r, st, st0)

Rule argument

[x0lemmaarg: spec-name: javatype instance-name: lemma-name: elim-02 antecedent: succedent: is_classtype(ty) → (class = ty .class ↔ ty = mkclasstype(class)) substlist: [ty, class] → [st[r -- _type] .type, class] add preconditions?: F is rewrite lemma?: F current spec?: F rotate lemma?: T replace all?: T paths: () dummy: () ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ is_classtype(ty) → ( class = ty .class ↔ ty = mkclasstype(class))])], [EXTRATERMS : (st[r -- _type] .type, class)]]