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Proof step 12 from proof junkref-put-badfield (previous step)

junkrefs(str, r0 ' + refs0, val .type, st[r0 -- _type, val]), junkrefs(str, r0 ' + refs0, val .type, st) ⊦ ∃ refs. refs ≠ [] ∧ refs .first = r0 ∧ junkrefs(str, refs, st[r0 -- _type] .type, 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 11:
junkrefs(str, r0 ' + refs0, val .type, st[r0 -- _type, val]), junkrefs(str, r0 ' + refs0, val .type, st) ⊦ is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type), ∃ refs. refs ≠ [] ∧ refs .first = r0 ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1])]]