\[\left(\left(\left(\left(\left(\left(x \cdot 18\right) \cdot y\right) \cdot z\right) \cdot t - \left(a \cdot 4\right) \cdot t\right) + b \cdot c\right) - \left(x \cdot 4\right) \cdot i\right) - \left(j \cdot 27\right) \cdot k\]

\left(\left(\left(\left(\left(\left(x \cdot 18\right) \cdot y\right) \cdot z\right) \cdot t - \left(a \cdot 4\right) \cdot t\right) + b \cdot c\right) - \left(x \cdot 4\right) \cdot i\right) - \left(j \cdot 27\right) \cdot k

double f(double x, double y, double z, double t, double a, double b, double c, double i, double j, double k) {
        double r81484 = x;
        double r81485 = 18.0;
        double r81486 = r81484 * r81485;
        double r81487 = y;
        double r81488 = r81486 * r81487;
        double r81489 = z;
        double r81490 = r81488 * r81489;
        double r81491 = t;
        double r81492 = r81490 * r81491;
        double r81493 = a;
        double r81494 = 4.0;
        double r81495 = r81493 * r81494;
        double r81496 = r81495 * r81491;
        double r81497 = r81492 - r81496;
        double r81498 = b;
        double r81499 = c;
        double r81500 = r81498 * r81499;
        double r81501 = r81497 + r81500;
        double r81502 = r81484 * r81494;
        double r81503 = i;
        double r81504 = r81502 * r81503;
        double r81505 = r81501 - r81504;
        double r81506 = j;
        double r81507 = 27.0;
        double r81508 = r81506 * r81507;
        double r81509 = k;
        double r81510 = r81508 * r81509;
        double r81511 = r81505 - r81510;
        return r81511;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019323 
(FPCore (x y z t a b c i j k)
  :name "Diagrams.Solve.Polynomial:cubForm  from diagrams-solve-0.1"
  :precision binary64
  (- (- (+ (- (* (* (* (* x 18) y) z) t) (* (* a 4) t)) (* b c)) (* (* x 4) i)) (* (* j 27) k)))

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