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Proof step 6 from proof unchanged-field-lookup (previous step)

¬ (unchangedNorec(r, st, st1) ∧ fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_classtype(st[r -- _type] .type) ∧ r ≠ jvmref), is_obj(str, r, st), fs ' ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1) ⊦ r = jvmref, st[r -- fs '] = st1[r -- fs ']

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
is_obj(str, r, st), fs ' ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1), is_classtype(st[r -- _type] .type) ⊦ r = jvmref, st[r -- fs '] = st1[r -- fs '], unchangedNorec(r, st, st1)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_classtype (st[r -- _type] .type) → ¬ is_obj(str, r, st)])]]