\[\frac{x}{x + y \cdot e^{2 \cdot \left(\frac{z \cdot \sqrt{t + a}}{t} - \left(b - c\right) \cdot \left(\left(a + \frac{5}{6}\right) - \frac{2}{t \cdot 3}\right)\right)}}\]

\frac{x}{x + y \cdot e^{2 \cdot \left(\frac{z \cdot \sqrt{t + a}}{t} - \left(b - c\right) \cdot \left(\left(a + \frac{5}{6}\right) - \frac{2}{t \cdot 3}\right)\right)}}

double f(double x, double y, double z, double t, double a, double b, double c) {
        double r8138 = x;
        double r8139 = y;
        double r8140 = 2.0;
        double r8141 = z;
        double r8142 = t;
        double r8143 = a;
        double r8144 = r8142 + r8143;
        double r8145 = sqrt(r8144);
        double r8146 = r8141 * r8145;
        double r8147 = r8146 / r8142;
        double r8148 = b;
        double r8149 = c;
        double r8150 = r8148 - r8149;
        double r8151 = 5.0;
        double r8152 = 6.0;
        double r8153 = r8151 / r8152;
        double r8154 = r8143 + r8153;
        double r8155 = 3.0;
        double r8156 = r8142 * r8155;
        double r8157 = r8140 / r8156;
        double r8158 = r8154 - r8157;
        double r8159 = r8150 * r8158;
        double r8160 = r8147 - r8159;
        double r8161 = r8140 * r8160;
        double r8162 = exp(r8161);
        double r8163 = r8139 * r8162;
        double r8164 = r8138 + r8163;
        double r8165 = r8138 / r8164;
        return r8165;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019179 +o rules:numerics
(FPCore (x y z t a b c)
  :name "Numeric.SpecFunctions:invIncompleteBetaWorker from math-functions-0.1.5.2"
  (/ x (+ x (* y (exp (* 2.0 (- (/ (* z (sqrt (+ t a))) t) (* (- b c) (- (+ a (/ 5.0 6.0)) (/ 2.0 (* t 3.0)))))))))))

Backtrace

result arity mismatch; expected number of values not received expected: 2 received: 1 in: local-binding form values...: 0		L	C
loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/extraction.rkt	25	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-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