\[\left(\left(x \cdot y + \frac{z \cdot t}{16}\right) - \frac{a \cdot b}{4}\right) + c\]

\left(\left(x \cdot y + \frac{z \cdot t}{16}\right) - \frac{a \cdot b}{4}\right) + c

double f(double x, double y, double z, double t, double a, double b, double c) {
        double r211270 = x;
        double r211271 = y;
        double r211272 = r211270 * r211271;
        double r211273 = z;
        double r211274 = t;
        double r211275 = r211273 * r211274;
        double r211276 = 16.0;
        double r211277 = r211275 / r211276;
        double r211278 = r211272 + r211277;
        double r211279 = a;
        double r211280 = b;
        double r211281 = r211279 * r211280;
        double r211282 = 4.0;
        double r211283 = r211281 / r211282;
        double r211284 = r211278 - r211283;
        double r211285 = c;
        double r211286 = r211284 + r211285;
        return r211286;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019323 
(FPCore (x y z t a b c)
  :name "Diagrams.Solve.Polynomial:quartForm  from diagrams-solve-0.1, C"
  :precision binary64
  (+ (- (+ (* x y) (/ (* z t) 16)) (/ (* a b) 4)) c))

Backtrace

get-representation: Unknown representation real		L	C
(unnamed)	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/regimes.rkt	65	3
filter	/opt/racket-7.2/collects/racket/private/list.rkt	256	2
infer-splitpoints	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/regimes.rkt	34	0
get-final-combination	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	369	0
(unnamed)	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.2/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.2/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	261	28