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Proof step 16 from proof validrefs-delete-03 (previous step)

fs = mkfs(class, ty0, fieldvar), is_obj(str, r0, st), st[r0 -- _type] .type ≤ ty, ∀ str, ty, st, r. validrefs(str, acc, ty, st) → r ∈ acc ∨ validrefs(str, acc, ty, st -- r), acc = [] ∨ fs ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- fs ']) ∧ acc .first = st[r0 -- fs '] .refval ∧ validrefs(str, acc, ty0, st) ⊦ r = r0, r0 = jvmref, r ∈ acc, validrefs(str, r0 ' + acc, ty, st -- r)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 15:
is_obj(str, r0, st), st[r0 -- _type] .type ≤ ty, ∀ str, ty, st, r. validrefs(str, acc, ty, st) → r ∈ acc ∨ validrefs(str, acc, ty, st -- r), acc = [] ∨ mkfs(class, ty0, fieldvar) ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- mkfs(class, ty0, fieldvar) ']) ∧ acc .first = st[r0 -- mkfs(class, ty0, fieldvar) '] .refval ∧ validrefs(str, acc, ty0, st) ⊦ r = r0, r0 = jvmref, r ∈ acc, validrefs(str, r0 ' + acc, ty, st -- r)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]