\[\frac{4.0}{\left(\left(3.0 \cdot \pi\right) \cdot \left(1.0 - v \cdot v\right)\right) \cdot \sqrt{2.0 - 6.0 \cdot \left(v \cdot v\right)}}\]

\frac{4.0}{\left(\left(3.0 \cdot \pi\right) \cdot \left(1.0 - v \cdot v\right)\right) \cdot \sqrt{2.0 - 6.0 \cdot \left(v \cdot v\right)}}

double f(double v) {
        double r5934261 = 4.0;
        double r5934262 = 3.0;
        double r5934263 = atan2(1.0, 0.0);
        double r5934264 = r5934262 * r5934263;
        double r5934265 = 1.0;
        double r5934266 = v;
        double r5934267 = r5934266 * r5934266;
        double r5934268 = r5934265 - r5934267;
        double r5934269 = r5934264 * r5934268;
        double r5934270 = 2.0;
        double r5934271 = 6.0;
        double r5934272 = r5934271 * r5934267;
        double r5934273 = r5934270 - r5934272;
        double r5934274 = sqrt(r5934273);
        double r5934275 = r5934269 * r5934274;
        double r5934276 = r5934261 / r5934275;
        return r5934276;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019165 
(FPCore (v)
  :name "Falkner and Boettcher, Equation (22+)"
  (/ 4.0 (* (* (* 3.0 PI) (- 1.0 (* v v))) (sqrt (- 2.0 (* 6.0 (* v v)))))))

Backtrace

->bf: contract violation expected: value? given: 'PI 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
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
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
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