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Proof step 6 from proof is_obj-put-index (conclusion)

⊦ is_obj(str, r, st[r0 -- i ', val]) ↔ is_obj(str, r, st)

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 2:
⊦ is_obj(r, st[r0 -- i ', val]) ↔ is_obj(r, st)
Proof step 5:
class+∃(str, st[r -- _type] .type .class), is_obj(r, st) ⊦ is_obj(str, r, st[r0 -- i ', val]), is_abstract(st[r -- _type] .type .class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (st[r -- i ', val][r0 -- _type]) = st[r0 -- _type]])]]