\[x \cdot 0.5 + y \cdot \left(\left(1 - z\right) + \log z\right)\]

x \cdot 0.5 + y \cdot \left(\left(1 - z\right) + \log z\right)

double f(double x, double y, double z) {
        double r230600 = x;
        double r230601 = 0.5;
        double r230602 = r230600 * r230601;
        double r230603 = y;
        double r230604 = 1.0;
        double r230605 = z;
        double r230606 = r230604 - r230605;
        double r230607 = log(r230605);
        double r230608 = r230606 + r230607;
        double r230609 = r230603 * r230608;
        double r230610 = r230602 + r230609;
        return r230610;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019323 
(FPCore (x y z)
  :name "System.Random.MWC.Distributions:gamma from mwc-random-0.13.3.2"
  :precision binary64

  :herbie-target
  (- (+ y (* 0.5 x)) (* y (- z (log z))))

  (+ (* x 0.5) (* y (+ (- 1 z) (log z)))))

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