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

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

double f(double x, double y, double z, double t, double a) {
        double r101430 = x;
        double r101431 = y;
        double r101432 = z;
        double r101433 = r101431 - r101432;
        double r101434 = t;
        double r101435 = r101434 - r101430;
        double r101436 = a;
        double r101437 = r101436 - r101432;
        double r101438 = r101435 / r101437;
        double r101439 = r101433 * r101438;
        double r101440 = r101430 + r101439;
        return r101440;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019323 +o rules:numerics
(FPCore (x y z t a)
  :name "Numeric.Signal:interpolate   from hsignal-0.2.7.1"
  :precision binary64
  (+ x (* (- y z) (/ (- t x) (- a z)))))

Backtrace

dict-ref: no value for key: 'branch101429 in: '((x . binary64) (y . binary64) (z . binary64) (t . binary64) (a . binary64))		L	C
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/points.rkt	106	4
make-sampler	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/points.rkt	99	0
prepare-points-intervals	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/points.rkt	121	0
for-loop	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/regimes.rkt	233	9
sindices->spoints	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/regimes.rkt	194	0
f33	/opt/racket-7.2/collects/racket/match/compiler.rkt	507	40
get-final-combination	/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt	369	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