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Proof step 7 from proof validref-class (previous step)

st[r -- mkfs(class0, ty0, fieldvar) '] = refval(r0), st[r -- _type] .type = mkclasstype(class), is_obj(str, r, st), mkfs(class0, ty0, fieldvar) ' ∈ instfields(class), is_reftype(ty0), is_classtype(ty), class ≤ ty .class, st[r0 -- _type] .type ≤ ty0, ¬ validref(str, r0, ty0, st) ∨ ¬ st[st[r -- mkfs(class0, ty0, fieldvar) '] .refval -- _type] .type ≤ ty0 ⊦ r = jvmref, r0 = jvmref, ty0 = abstract_type, junkref(str, r0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
st[r -- _type] .type = mkclasstype(class), st[r -- mkfs(class0, ty0, fieldvar) '] = refval(r0), st[r0 -- _type] .type ≤ ty0, class ≤ ty .class, is_classtype(ty), is_reftype(ty0), mkfs(class0, ty0, fieldvar) ' ∈ instfields(class), is_obj(str, r, st) ⊦ ty0 = abstract_type, r0 = jvmref, r = jvmref, junkref(str, r0, st), validref(str, r0, ty0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ refval(r) .refval = r])]]