alt-ergo does not run on windows via cygwin - frama-c

Question

I am trying to run a test file on frama-c with the alt-ergo prover. However,I am getting the followng error with alt-ergo. All the other frama-c checks are fine. I know that the issue is not with the test file.
------------------------------------------------------------
--- Alt-Ergo (stderr) :
------------------------------------------------------------
Fatal error: exception Sys_error("/tmp/wpf0dd65.dir/typed/test_post_2_Alt-Ergo.mlw: No such file or directory")
------------------------------------------------------------
[wp] [Alt-Ergo] Goal typed_test_post_2 : Failed
Error: Alt-Ergo exits with status [2]
I am on a windows machine and perform all of the installations via cygwin in administrator mode
I got frama-C Neon and installed it with ./configure & make & make-install, and the installation was successful ( all the frama-c checks pass in my test file)
I got the following version of alt-ergo Linux x86_64 binary: alt-ergo-0.95.2-x86_64 from http://alt-ergo.ocamlpro.com/download.php. I went with this version, since the frama-c docs ask for version 0.95.
I used the following instructions to install alt-ergo (https://www.lri.fr/~marche/MPRI-2-36-1/install.html)
Installation of Alt-ergo
The simplest way is to get the binary file of alt-ergo. Download the file called "Linux x86_64 binary" Then:
chmod +x alt-ergo-0.95.2-x86_64
sudo cp alt-ergo-0.95.2-x86_64 /usr/bin/alt-ergo
when calling which but frama-c and alt-ergo have a correct path
$ which frama-c
/usr/bin/frama-c
$ which alt-ergo
/usr/bin/alt-ergo
I also have why3 installed and it detects the ergo prover
$ why3 config --detect-provers
Found prover Alt-Ergo version 0.95.2, Ok.
1 provers detected and 0 provers detected with unsupported version
Save config to /home/username/.why3.conf
Edit
I created the following test.mlw with the online example
type 'a set
logic add : 'a , 'a set -> 'a set
logic mem : 'a , 'a set -> prop
axiom mem_add:
forall x, y : 'a. forall s : 'a set.
mem(x, add(y, s)) <->
(x = y or mem(x, s))
logic is1, is2 : int set
logic iss : int set set
goal g:
is1 = is2 ->
mem (is1, add (is2, iss))
running alt-ergo results in:
alt-ergo test.mlw
File "file.mlw", line 1, characters 1-26:Valid (0.0156) (0)
Any ideas?

Answer 1

The following treats the symptoms:
using the -wp-out flag with a windows path will solve the issue
for example
frama-c -wp -wp-print -wp-out c:/Users/userName/Desktop/tmp2 ../../cygdrive/c/Users/userName/Desktop/swap.c

Answer 2

Can you put the following example in a "file.mlw"
goal hello_world: 1+1 = 2
and then, try to execute your Windows and/or Cygwin binaries by providing "file.mlw" as input