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Proof step 14 from proof unchanged-class-forward (previous step)

sk .fs = mkfs(class, ty, fieldvar), is_referencevalue(st[r -- sk]), is_obj(str, r, st), sk ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1), st[r -- sk] .refval ≠ jvmref → st[st[r -- sk] .refval -- _type] .type ≤ ty ∧ is_valid_ref(str, st[r -- sk] .refval, st) ⊦ r = jvmref, unchanged(str, st[r -- sk] .refval, st, st1)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 13:
unchanged(str, r, st, st1), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), is_referencevalue(st[r -- mkfs(class, ty, fieldvar) ']), st[r -- mkfs(class, ty, fieldvar) '] .refval ≠ jvmref → st[st[r -- mkfs(class, ty, fieldvar) '] .refval -- _type] .type ≤ ty ∧ is_valid_ref(str, st[r -- mkfs(class, ty, fieldvar) '] .refval, st) ⊦ r = jvmref, unchanged(str, st[r -- mkfs(class, ty, fieldvar) '] .refval, st, st1)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ sk ∈ instfields(class0) → ( sk .fs = mkfs(class, ty, fieldvar) ↔ sk = mkfs(class, ty, fieldvar) ')])]]