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Proof step 33 from proof junkrefs-put-badfield (previous step)

is_obj(str, r, st[r0 -- fs ', val]) ∧ (st[r0 -- fs ', val][r -- _type]) .type ≤ ty, is_obj(str, r, st), acc ≠ [] ∧ (∃ fs0. fs0 ' ∈ instfields((st[r0 -- fs ', val][r -- _type]) .type .class) ∧ is_referencevalue(st[r0 -- fs ', val][r -- fs0 ']) ∧ acc .first = (st[r0 -- fs ', val][r -- fs0 ']) .refval ∧ junkrefs(str, acc, fs0 .type, st[r0 -- fs ', val])), st[r -- _type] .type ≤ ty, ∀ str, ty, st, r0, fs, val. junkrefs(str, acc, ty, st[r0 -- fs ', val]) → junkrefs(str, acc, ty, st) ∨ is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type) ⊦ r = jvmref, junkrefs(str, r ' + acc, ty, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 32:
acc .first = (st[r0 -- fs ', val][r -- fs0 ']) .refval, st[r -- _type] .type ≤ ty, junkrefs(str, acc, fs0 .type, st[r0 -- fs ', val]), is_referencevalue(st[r0 -- fs ', val][r -- fs0 ']), fs0 ' ∈ instfields((st[r0 -- fs ', val][r -- _type]) .type .class), is_obj(str, r, st), (st[r0 -- fs ', val][r -- _type]) .type ≤ ty, is_obj(str, r, st[r0 -- fs ', val]), ∀ str, ty, st, r0, fs, val. junkrefs(str, acc, ty, st[r0 -- fs ', val]) → junkrefs(str, acc, ty, st) ∨ is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type) ⊦ acc = [], r = jvmref, junkrefs(str, r ' + acc, ty, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]