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Proof step 28 from proof junkrefs-null-01 (previous step)

is_obj(str, r, st) ∧ st[r -- _type] .type ≤ ty, st[r -- _type] .type ≤ ty, is_obj(str, r, st), ∀ str, refs0, ty, st. junkrefs(str, acc + jvmref ' + refs0, ty, st) ↔ junkrefs(str, acc, ty, st) ⊦ r = jvmref, acc + jvmref ' + refs0 ≠ [] ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ (acc + jvmref ' + refs0) .first = st[r -- fs '] .refval ∧ junkrefs(str, acc + jvmref ' + refs0, fs .type, st)) ↔ acc ≠ [] ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ acc .first = st[r -- fs '] .refval ∧ junkrefs(str, acc, fs .type, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
st[r -- _type] .type ≤ ty, is_obj(str, r, st), ∀ str, refs0, ty, st. junkrefs(str, acc + jvmref ' + refs0, ty, st) ↔ junkrefs(str, acc, ty, st) ⊦ r = jvmref, (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ (acc + jvmref ') .first = st[r -- fs '] .refval ∧ junkrefs(str, acc + jvmref ' + refs0, fs .type, st)) ↔ acc ≠ [] ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ acc .first = st[r -- fs '] .refval ∧ junkrefs(str, acc, fs .type, st))

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + r ' + refs0) .first = (refs + r ') .first], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ refs + r ' + refs0 ≠ []])]]