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Proof step 106 from proof validref-refs-last-valid-subset (previous step)

acc = [], st0[r0 -- _type] = typeval(mkclasstype(class0)), st[r0 -- _type] = typeval(mkclasstype(class0)), st0[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), acc + r1 ' = r1 ' + refs, st[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), is_reftype(ty0), st ⊆ st0, validref(str, r0, mkclasstype(class0), st), class+∃(str, class0), r0 -- _type ∈ st0, r0 ∈ st0, validrefs(str, r1 ' + refs, ty0, st0), mkfs(class, ty0, fieldvar) ' ∈ instfields(class0), class0 ≤ class1, r0 -- mkfs(class, ty0, fieldvar) ' ∈ st0, validref(str, r1, ty0, st), ∀ sk. sk ∈ instfields(class0) → goodfieldandtype(r0, sk, st0), ∀ str, r, st, st0, r1, ty. validref(str, r, st[r -- _type] .type, st) ∧ st ⊆ st0 ∧ r ∈ acc ∧ validrefs(str, acc + r1 ', ty, st0) → validref(str, r1, st[r1 -- _type] .type, st) ⊦ r0 = jvmref, validref(str, r1, st[r1 -- _type] .type, st), is_abstract(class0), r1 ∈ acc

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 105:
st0[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), st[r0 -- _type] = typeval(mkclasstype(class0)), st0[r0 -- _type] = typeval(mkclasstype(class0)), st[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), r0 ∈ st0, r0 -- _type ∈ st0, class+∃(str, class0), validref(str, r0, mkclasstype(class0), st), st ⊆ st0, is_reftype(ty0), validref(str, r1, ty0, st), r0 -- mkfs(class, ty0, fieldvar) ' ∈ st0, class0 ≤ class1, mkfs(class, ty0, fieldvar) ' ∈ instfields(class0), validrefs(str, r1 ', ty0, st0), ∀ sk. sk ∈ instfields(class0) → goodfieldandtype(r0, sk, st0) ⊦ r0 = jvmref, is_abstract(class0), validref(str, r1, st[r1 -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ refs + [] = refs], [CSIMPSEQ : ⊦ ¬ r ∈ []], [CSIMPSEQ : ⊦ r ' = r0 ' + refs ↔ r = r0 ∧ refs = []], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ [] + refs = refs])]]