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Proof step 27 from proof junkref-put-badfield (previous step)

junkrefs(str, r ' + refs0, (st[r0 -- fs ', val][r -- _type]) .type, st[r0 -- fs ', val]) ⊦ r -- _type = r0 -- fs ', junkref(str, r, 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 26:
junkrefs(str, r ' + refs0, (st[r0 -- fs ', val][r -- _type]) .type, st[r0 -- fs ', val]), r ≠ r0 ∨ _type ≠ fs ' ⊦ junkref(str, r, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r -- sk = r0 -- sk0 ↔ ¬ ¬ (r = r0 ∧ sk = sk0)])]]