\[\frac{\left(\left(x + y\right) \cdot z + \left(t + y\right) \cdot a\right) - y \cdot b}{\left(x + t\right) + y}\]

\frac{\left(\left(x + y\right) \cdot z + \left(t + y\right) \cdot a\right) - y \cdot b}{\left(x + t\right) + y}

double f(double x, double y, double z, double t, double a, double b) {
        double r113970 = x;
        double r113971 = y;
        double r113972 = r113970 + r113971;
        double r113973 = z;
        double r113974 = r113972 * r113973;
        double r113975 = t;
        double r113976 = r113975 + r113971;
        double r113977 = a;
        double r113978 = r113976 * r113977;
        double r113979 = r113974 + r113978;
        double r113980 = b;
        double r113981 = r113971 * r113980;
        double r113982 = r113979 - r113981;
        double r113983 = r113970 + r113975;
        double r113984 = r113983 + r113971;
        double r113985 = r113982 / r113984;
        return r113985;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019315 
(FPCore (x y z t a b)
  :name "AI.Clustering.Hierarchical.Internal:ward from clustering-0.2.1"
  :precision binary64

  :herbie-target
  (if (< (/ (- (+ (* (+ x y) z) (* (+ t y) a)) (* y b)) (+ (+ x t) y)) -3.5813117084150564e153) (- (+ z a) b) (if (< (/ (- (+ (* (+ x y) z) (* (+ t y) a)) (* y b)) (+ (+ x t) y)) 1.2285964308315609e82) (/ 1 (/ (+ (+ x t) y) (- (+ (* (+ x y) z) (* (+ t y) a)) (* y b)))) (- (+ z a) b)))

  (/ (- (+ (* (+ x y) z) (* (+ t y) a)) (* y b)) (+ (+ x t) y)))

Backtrace

match: no matching clause for 'binary64		L	C
match:error	/opt/racket-7.2/collects/racket/match/runtime.rkt	24	0
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/reduce.rkt	246	3
make-multiplication-subnode	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/reduce.rkt	244	0
make-multiplication-node	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/reduce.rkt	234	0
simplify	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/reduce.rkt	16	0
hash-ref!	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	376	2
first-nonzero-exp	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	266	0
taylor-quotient	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	334	0
map	/opt/racket-7.2/collects/racket/private/map.rkt	35	13
taylor	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	170	0
taylor	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	170	0
hash-ref!	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	376	2
(unnamed)	/opt/racket-7.2/collects/racket/contract/private/arrow-higher-order.rkt	360	33
(unnamed)	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	68	15
hash-ref!	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	376	2
(unnamed)	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	68	15
hash-ref!	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	376	2
(unnamed)	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	68	15
hash-ref!	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	376	2
(unnamed)	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	68	15
hash-ref!	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	376	2
(unnamed)	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	68	15
hash-ref!	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	376	2
loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	87	4
approximate9	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/taylor.rkt	12	0
(unnamed)	/opt/racket-7.2/collects/racket/contract/private/arrow-higher-order.rkt	360	33
location-do	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/programs.rkt	64	0
(unnamed)	/opt/racket-7.2/collects/racket/contract/private/arrow-higher-order.rkt	360	33
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	151	6
taylor-alt	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	145	0
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	166	7
gen-series!	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	159	0
run-iter!	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	326	0
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	364	4
run-improve47	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	345	0
(unnamed)	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.2/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.2/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.2/collects/racket/private/more-scheme.rkt	261	28