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Proof step 49 from proof validrefnotnull-union-at-right (previous step)

r ≠ jvmref ∧ validref(str, r, mkclasstype(class), st0), sk ∈ instfields(class), is_fskey(sk) ⊦ r = jvmref, st[r -- sk] = noval, r -- sk ∈ st0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 48:
is_fskey(sk), sk ∈ instfields(class), validref(str, r, mkclasstype(class), st0) ⊦ r = jvmref, st[r -- sk] = noval, r -- sk ∈ st0

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]