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Proof step 20 from proof junkref-class-01 (previous step)

st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), junkrefs(str, r0 ' + refs, ty, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_classtype(st[r -- _type] .type) ∧ is_obj(r, st[r -- _type] .type .class, st), class+∃(str, st[r -- _type] .type .class) ⊦ r0 = jvmref, ty = abstract_type, is_abstract(st[r -- _type] .type .class), is_reftype(ty)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 19:
st[r -- mkfs(class, ty, fieldvar) '] = refval(r0), st[r -- _type] = typeval(mkclasstype(st[r -- _type] .type .class)), junkrefs(str, r0 ' + refs, ty, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), r -- _type ∈ st, is_typevalue(st[r -- _type]), is_classtype(st[r -- _type] .type), is_obj(r, st[r -- _type] .type .class, st), class+∃(str, st[r -- _type] .type .class), r ∈ st ⊦ r0 = jvmref, ty = abstract_type, r = jvmref, is_abstract(st[r -- _type] .type .class), is_reftype(ty)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ sk ∈ instfields (st[r -- _type] .type .class) ∧ is_obj(r, class, st) → st[r -- _type] = typeval(mkclasstype(class))], [CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st])]]