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Proof step 17 from proof fits-in (previous step)

is_obj(str, r, st), st[r -- sk] = refval(r1), st[r -- _type] .type = mkclasstype(class), sk ∈ instfields(class), fits(r1, sks0, st), r -- sk ∈ st, r ∈ st, is_obj(str, r, st), junkref(str, r1, st), ∀ str0, r0, st0. ¬ junkref(str0, r0, st0) ∧ fits(r0, sks0, st0) → r0 -- sks0 ∈ st0 ⊦ sks0 = [], r = jvmref, ∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ st[r -- fs '] .refval ≠ jvmref ∧ (¬ st[st[r -- fs '] .refval -- _type] .type ≤ fs .type ∨ junkref(str, st[r -- fs '] .refval, st)), r1 -- sks0 ∈ st

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 16:
st[r -- _type] .type = mkclasstype(class), st[r -- sk] = refval(r1), junkref(str, r1, st), is_obj(str, r, st), r ∈ st, r -- sk ∈ st, fits(r1, sks0, st), sk ∈ instfields(class), ∀ str0, r0, st0. ¬ junkref(str0, r0, st0) ∧ fits(r0, sks0, st0) → r0 -- sks0 ∈ st0 ⊦ r = jvmref, sks0 = [], r1 -- sks0 ∈ st, ∃ fs. fs ' ∈ instfields(class) ∧ is_referencevalue(st[r -- fs ']) ∧ st[r -- fs '] .refval ≠ jvmref ∧ (¬ st[st[r -- fs '] .refval -- _type] .type ≤ fs .type ∨ junkref(str, st[r -- fs '] .refval, st))

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkclasstype(class) .class = class])]]