src/HOL/SMT/Examples/cert/z3_linarith_06

fix soundness bug in Nitpick's "destroy_constrs" optimization

(benchmark Isabelle
:extrafuns (
  (uf_1 Real)
  (uf_2 Real)
 )
:assumption (not (<= (ite (< (+ uf_1 uf_2) 0.0) (~ (+ uf_1 uf_2)) (+ uf_1 uf_2)) (+ (ite (< uf_1 0.0) (~ uf_1) uf_1) (ite (< uf_2 0.0) (~ uf_2) uf_2))))
:formula true
)