\[\left(\left(333.75 \cdot {33096}^{6} + \left(77617 \cdot 77617\right) \cdot \left(\left(\left(\left(11 \cdot \left(77617 \cdot 77617\right)\right) \cdot \left(33096 \cdot 33096\right) + \left(-{33096}^{6}\right)\right) + -121 \cdot {33096}^{4}\right) + -2\right)\right) + 5.5 \cdot {33096}^{8}\right) + \frac{77617}{2 \cdot 33096}\]

\left(\left(333.75 \cdot {33096}^{6} + \left(77617 \cdot 77617\right) \cdot \left(\left(\left(\left(11 \cdot \left(77617 \cdot 77617\right)\right) \cdot \left(33096 \cdot 33096\right) + \left(-{33096}^{6}\right)\right) + -121 \cdot {33096}^{4}\right) + -2\right)\right) + 5.5 \cdot {33096}^{8}\right) + \frac{77617}{2 \cdot 33096}

double f() {
        double r22866 = 333.75;
        double r22867 = 33096.0;
        double r22868 = 6.0;
        double r22869 = pow(r22867, r22868);
        double r22870 = r22866 * r22869;
        double r22871 = 77617.0;
        double r22872 = r22871 * r22871;
        double r22873 = 11.0;
        double r22874 = r22873 * r22872;
        double r22875 = r22867 * r22867;
        double r22876 = r22874 * r22875;
        double r22877 = -r22869;
        double r22878 = r22876 + r22877;
        double r22879 = -121.0;
        double r22880 = 4.0;
        double r22881 = pow(r22867, r22880);
        double r22882 = r22879 * r22881;
        double r22883 = r22878 + r22882;
        double r22884 = -2.0;
        double r22885 = r22883 + r22884;
        double r22886 = r22872 * r22885;
        double r22887 = r22870 + r22886;
        double r22888 = 5.5;
        double r22889 = 8.0;
        double r22890 = pow(r22867, r22889);
        double r22891 = r22888 * r22890;
        double r22892 = r22887 + r22891;
        double r22893 = 2.0;
        double r22894 = r22893 * r22867;
        double r22895 = r22871 / r22894;
        double r22896 = r22892 + r22895;
        return r22896;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019194 
(FPCore ()
  :name "From Warwick Tucker's Validated Numerics"
  (+ (+ (+ (* 333.75 (pow 33096.0 6.0)) (* (* 77617.0 77617.0) (+ (+ (+ (* (* 11.0 (* 77617.0 77617.0)) (* 33096.0 33096.0)) (- (pow 33096.0 6.0))) (* -121.0 (pow 33096.0 4.0))) -2.0))) (* 5.5 (pow 33096.0 8.0))) (/ 77617.0 (* 2.0 33096.0))))

Backtrace

car: contract violation expected: pair? given: '()		L	C
loop	/data/pavpan/nightlies/herbie/js-tweaks/src/points.rkt	122	4
prepare-points	/data/pavpan/nightlies/herbie/js-tweaks/src/points.rkt	146	0
run-improve47	/data/pavpan/nightlies/herbie/js-tweaks/src/mainloop.rkt	342	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28