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Proof step 8 from proof is_obj-put-samefield (previous step)

fs = mkfs(class, ty, fieldvar), class+∃(str, st[r -- _type] .type .class), is_obj(r, st), r -- fs ' ∈ st, okval(st[r -- fs '], ty), okval(val, ty), r ∈ st ⊦ fs ' = _type, is_obj(str, r, st[r -- fs ', val]), is_abstract(st[r -- _type] .type .class)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
class+∃(str, st[r -- _type] .type .class), is_obj(r, st), r -- mkfs(class, ty, fieldvar) ' ∈ st, okval(st[r -- mkfs(class, ty, fieldvar) '], ty), okval(val, ty), r ∈ st ⊦ mkfs(class, ty, fieldvar) ' = _type, is_obj(str, r, st[r -- mkfs(class, ty, fieldvar) ', val]), is_abstract(st[r -- _type] .type .class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]