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Proof step 5 from proof is_obj-put-badfield (conclusion)

⊦ is_obj(str, r, st) ∧ fs ' ≠ _type ∧ ¬ fs ' ∈ instfields(st[r -- _type] .type .class) → is_obj(str, r, st[r -- fs ', val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ is_obj(str, r, st) ↔ class+∃(str, st[r -- _type] .type .class) ∧ ¬ is_abstract(st[r -- _type] .type .class) ∧ is_obj(r, st)
Proof step 4:
class+∃(str, st[r -- _type] .type .class), is_obj(r, st) ⊦ fs ' = _type, is_obj(str, r, st[r -- fs ', val]), fs ' ∈ instfields(st[r -- _type] .type .class), is_abstract(st[r -- _type] .type .class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]