added proof reconstructon for Z3,
added certificates for simpler re-checking of proofs (no need to invoke external solvers),
added examples and certificates for all examples,
removed Unsynchronized.ref (in smt_normalize.ML)
(benchmark Isabelle
:extrasorts ( T2 T1)
:extrafuns (
(uf_2 T1)
(uf_1 Int Int T1)
(uf_3 T1 T2)
)
:assumption (forall (?x1 Int) (?x2 Int) (iff (= (uf_1 ?x1 ?x2) uf_2) (< ?x1 ?x2)))
:assumption (not (= (uf_3 (uf_1 2 3)) (uf_3 uf_2)))
:formula true
)