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Proof step 8 from proof junkref-put-null (previous step)

is_reftype(ty), junkrefs (str, r ' + refs0, (st[r0 -- mkfs(class, ty, fieldvar) ', refval(jvmref)][r -- _type]) .type, st[r0 -- mkfs(class, ty, fieldvar) ', refval(jvmref)]) ⊦ r -- _type = r0 -- mkfs(class, ty, fieldvar) ', junkref(str, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
is_reftype(ty), junkrefs (str, r ' + refs0, (st[r0 -- mkfs(class, ty, fieldvar) ', refval(jvmref)][r -- _type]) .type, st[r0 -- mkfs(class, ty, fieldvar) ', refval(jvmref)]), r ≠ r0 ∨ _type ≠ mkfs(class, ty, fieldvar) ' ⊦ junkref(str, r, st)

Rule argument

[emptyarg]

Additional information

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