generic: The router enters an infinite loop

[AhmedKrayma]

I have never been able to find a routing solution for this example (as well as many other examples), although it is a small design.
I have attached the Verilog design file, the architecture file, and the log of nextpnr (I interrupted it because it was taking too long).

ca_prng_Design.zip

I'd appreciate any help. Thanks.