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Proof step 28 from proof validrefs-put-notin (previous step)

is_obj(str, r0, st) ∧ st[r0 -- _type] .type ≤ ty, is_obj(str, r0, st), st[r0 -- _type] .type ≤ ty, ∀ str, ty, st, r, sk, val. (validrefs(str, acc, ty, st[r -- sk, val]) ↔ validrefs(str, acc, ty, st)) ∨ r ∈ acc ⊦ r0 = jvmref, r = r0, validrefs(str, r0 ' + acc, ty, st[r -- sk, val]) ↔ acc = [] ∨ (∃ fs. fs ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- fs ']) ∧ acc .first = st[r0 -- fs '] .refval ∧ validrefs(str, acc, fs .type, st)), r ∈ acc

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
st[r0 -- _type] .type ≤ ty, is_obj(str, r0, st), ∀ str, ty, st, r, sk, val. (validrefs(str, acc, ty, st[r -- sk, val]) ↔ validrefs(str, acc, ty, st)) ∨ r ∈ acc ⊦ validrefs(str, r0 ' + acc, ty, st[r -- sk, val]) ↔ acc = [] ∨ (∃ fs. fs ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- fs ']) ∧ acc .first = st[r0 -- fs '] .refval ∧ validrefs(str, acc, fs .type, st)), r = r0, r0 = jvmref, r ∈ acc

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]