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Proof step 5 from proof okbar-nopath (previous step)

¬ (is_array(str, r, st) ∧ st[r -- _type] .type ≤ mkclasstype(`java.lang.Object' .class)), okbytearray(r, st), validrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st) ⊦ r = (r ' + refs0) .last

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
okbytearray(r, st), validrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st) ⊦ r = (r ' + refs0) .last, is_array(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_array(str, r, st) → ( st[r -- _type] .type ≤ mkclasstype(class) ↔ class = `java.lang.Object' .class)])]]