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Proof step 9 from proof is_obj-full-expand (previous step)

class+∃(str, st[r -- _type] .type .class) ⊦ r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_classtype(st[r -- _type] .type) ∧ is_obj(r, st[r -- _type] .type .class, st) ↔ r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_classtype(st[r -- _type] .type) ∧ goodfieldsandtypes(r, instfields(st[r -- _type] .type .class), st), is_abstract(st[r -- _type] .type .class)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
class+∃(str, st[r -- _type] .type .class), r -- _type ∈ st, is_typevalue(st[r -- _type]), is_classtype(st[r -- _type] .type), r ∈ st ⊦ is_obj(r, st[r -- _type] .type .class, st) ↔ goodfieldsandtypes(r, instfields(st[r -- _type] .type .class), st), r = jvmref, is_abstract(st[r -- _type] .type .class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st])]]