Exception for Logarithmic Transform

• could not determine a ground truth

  1. c = -1.7320452260248625e+40
  2. x = 8.809580206516712e+52
  3. y = 1.3402838345530573e+252

Specification

Math

\[\begin{array}{l} \\ c \cdot \log \left(1 + \left({e}^{x} - 1\right) \cdot y\right) \end{array} \]

FPCore

(FPCore (c x y)
 :precision binary64
 (* c (log (+ 1.0 (* (- (pow E x) 1.0) y)))))

C

double code(double c, double x, double y) {
	return c * log((1.0 + ((pow(((double) M_E), x) - 1.0) * y)));
}

Java

public static double code(double c, double x, double y) {
	return c * Math.log((1.0 + ((Math.pow(Math.E, x) - 1.0) * y)));
}

Python

def code(c, x, y):
	return c * math.log((1.0 + ((math.pow(math.e, x) - 1.0) * y)))

Julia

function code(c, x, y)
	return Float64(c * log(Float64(1.0 + Float64(Float64((exp(1) ^ x) - 1.0) * y))))
end

MATLAB

function tmp = code(c, x, y)
	tmp = c * log((1.0 + (((2.71828182845904523536 ^ x) - 1.0) * y)));
end

Wolfram

code[c_, x_, y_] := N[(c * N[Log[N[(1.0 + N[(N[(N[Power[E, x], $MachinePrecision] - 1.0), $MachinePrecision] * y), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]

Reproduce

herbie shell --seed 2025093 
(FPCore (c x y)
  :name "Logarithmic Transform"
  :precision binary64

  :alt
  (* c (log1p (* (expm1 x) y)))

  (* c (log (+ 1.0 (* (- (pow E x) 1.0) y)))))

Please file a bug report with this information.

Backtrace

result arity mismatch; expected number of values not received expected: 2 received: 1 in: local-binding form arguments...: '((-1.4385846984127544e-9 3.1925350022729644e+299 3.577942092914687e-228 -1.2472391382649839e-105) . #f)		L	C
batch-prepare-points	/home/nightlies/herbie/random-cleanup/src/core/sampling.rkt	123	0
prepend-argument	/home/nightlies/herbie/random-cleanup/src/core/bsearch.rkt	97	0
hash-ref!	/usr/share/racket/collects/racket/private/more-scheme.rkt	377	2
pred	/home/nightlies/herbie/random-cleanup/src/core/bsearch.rkt	140	4
binary-search-floats	/home/nightlies/herbie/random-cleanup/src/core/bsearch.rkt	69	0
sindices->spoints	/home/nightlies/herbie/random-cleanup/src/core/bsearch.rkt	121	0
(unnamed)	/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt	379	33
f11	.../match/compiler.rkt	559	40
make-regime!	/home/nightlies/herbie/random-cleanup/src/core/mainloop.rkt	262	0
extract!	/home/nightlies/herbie/random-cleanup/src/core/mainloop.rkt	61	0
run-improve!	/home/nightlies/herbie/random-cleanup/src/core/mainloop.rkt	37	0
get-alternatives	/home/nightlies/herbie/random-cleanup/src/api/sandbox.rkt	61	0
(unnamed)	/home/nightlies/herbie/random-cleanup/src/api/sandbox.rkt	193	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
in-engine	/home/nightlies/herbie/random-cleanup/src/api/sandbox.rkt	209	2
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24