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Proof step 20 from proof fits-superset (previous step)

st[r -- sk] = refval(r0), r -- _type ∈ st, r ∈ st, sk ∈ instfields(st[r -- _type] .type .class), is_classtype(st[r -- _type] .type), fits(r0, sks0, st), st ⊆ st0, is_obj(str, r, st), r -- sk ∈ st, st ⊆ st0 ∧ fits(r0, sks0, st) → junkref(str, r0, st) ∨ fits(r0, sks0, st0) ⊦ r = jvmref, junkref(str, r, st), fits(r0, sks0, st0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 19:
st[r -- sk] = refval(r0), r -- _type ∈ st, r ∈ st, sk ∈ instfields(st[r -- _type] .type .class), is_classtype(st[r -- _type] .type), fits(r0, sks0, st), st ⊆ st0, is_obj(str, r, st), r -- sk ∈ st, junkref(str, r0, st) ⊦ r = jvmref, junkref(str, r, st), fits(r0, sks0, st0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]