\[\alpha \gt -1 \land \beta \gt -1 \land i \gt 0.0\]

\[\frac{\frac{\frac{\left(\alpha + \beta\right) \cdot \left(\beta - \alpha\right)}{\left(\alpha + \beta\right) + 2 \cdot i}}{\left(\left(\alpha + \beta\right) + 2 \cdot i\right) + 2} + 1}{2}\]

\frac{\frac{\frac{\left(\alpha + \beta\right) \cdot \left(\beta - \alpha\right)}{\left(\alpha + \beta\right) + 2 \cdot i}}{\left(\left(\alpha + \beta\right) + 2 \cdot i\right) + 2} + 1}{2}

double f(double alpha, double beta, double i) {
        double r8446 = alpha;
        double r8447 = beta;
        double r8448 = r8446 + r8447;
        double r8449 = r8447 - r8446;
        double r8450 = r8448 * r8449;
        double r8451 = 2.0;
        double r8452 = i;
        double r8453 = r8451 * r8452;
        double r8454 = r8448 + r8453;
        double r8455 = r8450 / r8454;
        double r8456 = r8454 + r8451;
        double r8457 = r8455 / r8456;
        double r8458 = 1.0;
        double r8459 = r8457 + r8458;
        double r8460 = r8459 / r8451;
        return r8460;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (alpha beta i)
  :name "Octave 3.8, jcobi/2"
  :pre (and (> alpha -1.0) (> beta -1.0) (> i 0.0))
  (/ (+ (/ (/ (* (+ alpha beta) (- beta alpha)) (+ (+ alpha beta) (* 2.0 i))) (+ (+ (+ alpha beta) (* 2.0 i)) 2.0)) 1.0) 2.0))

Backtrace

get-representation: Unknown representation #f		L	C
loop	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	122	4
prepare-points	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	146	0
setup-prog!34	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	67	0
run-improve43	/data/pavpan/nightlies/herbie/interface2/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