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Proof step 17 from proof unchNorec-validrefs (previous step)

st[r -- mkfs(class, ty0, fieldvar) '] = refval(r1), st[r -- _type] = st0[r -- _type], is_obj(str, r, st0), is_obj(str, r, st), st0[r -- _type] .type ≤ ty, unchangedNorec(r, st, st0), mkfs(class, ty0, fieldvar) ' ∈ instfields(st0[r -- _type] .type .class), is_referencevalue(st[r -- mkfs(class, ty0, fieldvar) ']), validrefs(str, r1 ' + refs, ty0, st), ∀ str0, ty1, st1, st2. validrefs(str0, r1 ' + refs, ty1, st1) ∧ (∀ r0. r0 = r1 ∨ r0 ∈ refs → unchangedNorec(r0, st1, st2)) → validrefs(str0, r1 ' + refs, ty1, st2), ∀ r0. r0 = r1 ∨ r0 ∈ refs → unchangedNorec(r0, st, st0) ⊦ r = jvmref, ∃ fs. fs ' ∈ instfields(st0[r -- _type] .type .class) ∧ is_referencevalue(st0[r -- fs ']) ∧ r1 = st0[r -- fs '] .refval ∧ validrefs(str, r1 ' + refs, fs .type, st0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 16:
st[r -- _type] = st0[r -- _type], st[r -- mkfs(class, ty0, fieldvar) '] = refval(r1), validrefs(str, r1 ' + refs, ty0, st), mkfs(class, ty0, fieldvar) ' ∈ instfields(st0[r -- _type] .type .class), unchangedNorec(r, st, st0), st0[r -- _type] .type ≤ ty, is_obj(str, r, st), is_obj(str, r, st0), ∀ r0. r0 = r1 ∨ r0 ∈ refs → unchangedNorec(r0, st, st0), ∀ str0, ty1, st1, st2. validrefs(str0, r1 ' + refs, ty1, st1) ∧ (∀ r0. r0 = r1 ∨ r0 ∈ refs → unchangedNorec(r0, st1, st2)) → validrefs(str0, r1 ' + refs, ty1, st2) ⊦ r = jvmref, ∃ fs. fs ' ∈ instfields(st0[r -- _type] .type .class) ∧ is_referencevalue(st0[r -- fs ']) ∧ r1 = st0[r -- fs '] .refval ∧ validrefs(str, st0[r -- fs '] .refval ' + refs, fs .type, st0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_referencevalue(refval(r))], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1])]]