\[\frac{NdChar}{1 + e^{\frac{-\left(\left(\left(Ec - Vef\right) - EDonor\right) - mu\right)}{KbT}}} + \frac{NaChar}{1 + e^{\frac{\left(\left(Ev + Vef\right) + EAccept\right) + \left(-mu\right)}{KbT}}}\]

\frac{NdChar}{1 + e^{\frac{-\left(\left(\left(Ec - Vef\right) - EDonor\right) - mu\right)}{KbT}}} + \frac{NaChar}{1 + e^{\frac{\left(\left(Ev + Vef\right) + EAccept\right) + \left(-mu\right)}{KbT}}}

double f(double NdChar, double Ec, double Vef, double EDonor, double mu, double KbT, double NaChar, double Ev, double EAccept) {
        double r10459019 = NdChar;
        double r10459020 = 1.0;
        double r10459021 = Ec;
        double r10459022 = Vef;
        double r10459023 = r10459021 - r10459022;
        double r10459024 = EDonor;
        double r10459025 = r10459023 - r10459024;
        double r10459026 = mu;
        double r10459027 = r10459025 - r10459026;
        double r10459028 = -r10459027;
        double r10459029 = KbT;
        double r10459030 = r10459028 / r10459029;
        double r10459031 = exp(r10459030);
        double r10459032 = r10459020 + r10459031;
        double r10459033 = r10459019 / r10459032;
        double r10459034 = NaChar;
        double r10459035 = Ev;
        double r10459036 = r10459035 + r10459022;
        double r10459037 = EAccept;
        double r10459038 = r10459036 + r10459037;
        double r10459039 = -r10459026;
        double r10459040 = r10459038 + r10459039;
        double r10459041 = r10459040 / r10459029;
        double r10459042 = exp(r10459041);
        double r10459043 = r10459020 + r10459042;
        double r10459044 = r10459034 / r10459043;
        double r10459045 = r10459033 + r10459044;
        return r10459045;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019173 
(FPCore (NdChar Ec Vef EDonor mu KbT NaChar Ev EAccept)
  :name "Bulmash initializePoisson"
  (+ (/ NdChar (+ 1.0 (exp (/ (- (- (- (- Ec Vef) EDonor) mu)) KbT)))) (/ NaChar (+ 1.0 (exp (/ (+ (+ (+ Ev Vef) EAccept) (- mu)) KbT))))))

Backtrace

hash-ref: no value found for key key: #<enode 478(478)>		L	C
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	197	2
extractor-extract	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	196	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	35	2
(unnamed)	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	26	0
simplify!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	217	0
run-iter!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	320	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	354	4
run-improve43	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	339	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

could not determine a ground truth for program body (more)

Reproduce

Backtrace