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Proof step 10 from proof is_valid_ref-put-equiv (previous step)

fs = mkfs(class, ty, fieldvar), okval(st[r1 -- fs '], ty), r1 -- fs ' ∈ st, okval(val, ty), r1 ∈ st ⊦ fs ' = _length, ty = void_type, class+∃(str, st[r -- _type] .type .class) ∧ ¬ is_abstract(st[r -- _type] .type .class) ∧ is_obj(r, st) ∨ is_array(str, r, st[r1 -- fs ', val]) ↔ is_obj(str, r, st) ∨ is_array(str, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 9:
okval(st[r1 -- mkfs(class, ty, fieldvar) '], ty), r1 -- mkfs(class, ty, fieldvar) ' ∈ st, okval(val, ty), r1 ∈ st ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, class+∃(str, st[r -- _type] .type .class) ∧ ¬ is_abstract(st[r -- _type] .type .class) ∧ is_obj(r, st) ∨ is_array(str, r, st[r1 -- mkfs(class, ty, fieldvar) ', val]) ↔ is_obj(str, r, st) ∨ is_array(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]