src/HOL/SMT/Examples/cert/z3_arith_quant_16

faster preprocessing: before applying a step, test if it is applicable (normalization of binders, unfolding of abs/min/max definitions, lambda lifting, explicit application, monomorphization),
custom-made (top-down) atomize_conv,
store predicate and function symbols in a table instead of a list for faster lookup,
updated certificates

+
−(benchmark Isabelle
+
−:assumption (not (exists (?x1 Int) (forall (?x2 Int) (?x3 Real) (implies (and (< 0 ?x2) (< 0.0 ?x3)) (< (~ 1) ?x2)))))
+
−:formula true
+
−)