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Proof step 67 from proof junkref-class-01 (previous step)

fs = mkfs(class, ty, fieldvar), fs ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), is_referencevalue(st[r -- fs ']), is_reftype(ty) ∨ ty = abstract_type, junkref(str, st[r -- fs '] .refval, st) ∨ ¬ st[st[r -- fs '] .refval -- _type] .type ≤ ty ⊦ st[r -- fs '] .refval = jvmref, ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 66:
mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), is_referencevalue(st[r -- mkfs(class, ty, fieldvar) ']), is_reftype(ty), junkref(str, st[r -- mkfs(class, ty, fieldvar) '] .refval, st) ∨ ¬ st[st[r -- mkfs(class, ty, fieldvar) '] .refval -- _type] .type ≤ ty ⊦ st[r -- mkfs(class, ty, fieldvar) '] .refval = jvmref, ty = abstract_type, ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ mkfs (class0, abstract_type, fieldvar) ' ∈ instfields(class)])]]