\[\alpha \gt -1.0 \land \beta \gt -1.0\]

\[\frac{\frac{\beta - \alpha}{\left(\alpha + \beta\right) + 2.0} + 1.0}{2.0}\]

\frac{\frac{\beta - \alpha}{\left(\alpha + \beta\right) + 2.0} + 1.0}{2.0}

double f(double alpha, double beta) {
        double r3356139 = beta;
        double r3356140 = alpha;
        double r3356141 = r3356139 - r3356140;
        double r3356142 = r3356140 + r3356139;
        double r3356143 = 2.0;
        double r3356144 = r3356142 + r3356143;
        double r3356145 = r3356141 / r3356144;
        double r3356146 = 1.0;
        double r3356147 = r3356145 + r3356146;
        double r3356148 = r3356147 / r3356143;
        return r3356148;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019165 +o rules:numerics
(FPCore (alpha beta)
  :name "Octave 3.8, jcobi/1"
  :pre (and (> alpha -1.0) (> beta -1.0))
  (/ (+ (/ (- beta alpha) (+ (+ alpha beta) 2.0)) 1.0) 2.0))

Backtrace

->bf: contract violation expected: value? given: 'E in: the 1st argument of (-> value? bigvalue?) contract from: (function ->bf) blaming: /data/pavpan/nightlies/herbie/optional-posits/src/float.rkt (assuming the contract is correct) at: /data/pavpan/nightlies/herbie/optional-posits/src/float.rkt:163.18		L	C
raise-blame-error16	/opt/racket-7.0/collects/racket/contract/private/blame.rkt	347	0
(unnamed)	/opt/racket-7.0/collects/racket/contract/private/arrow-higher-order.rkt	357	33
(unnamed)	/data/pavpan/nightlies/herbie/optional-posits/src/core/localize.rkt	22	13
hash-ref!	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	376	2
loop	/opt/racket-7.0/collects/racket/private/map.rkt	40	19
parse-loop15	/opt/racket-7.0/collects/racket/match/compiler.rkt	418	15
hash-ref!	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	376	2
localize-error	/data/pavpan/nightlies/herbie/optional-posits/src/core/localize.rkt	52	0
localize!	/data/pavpan/nightlies/herbie/optional-posits/src/mainloop.rkt	116	0
run-iter!	/data/pavpan/nightlies/herbie/optional-posits/src/mainloop.rkt	317	0
for-loop	/data/pavpan/nightlies/herbie/optional-posits/src/mainloop.rkt	351	4
run-improve40	/data/pavpan/nightlies/herbie/optional-posits/src/mainloop.rkt	336	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