[FEATURE] Change the format of uninterpreted constants

[konnov]

In the current format, we have to write uninterpreted constants as uval_TYPE_name, e.g.:

  /\ tmState = "uval_SORT_STATE_init"

See TwoPhaseUFO for more examples.

I find the current notation to be verbose and hard to read. I am proposing to change it to the more readable format:

name_OF_TYPE

So the above example would look like follows:

  /\ tmState = "init_OF_SORT_STATE"

The benefit of this new format is that the most important part of the constant appears on the left, that is, init. Moreover, the type and the infix _OF_ are both capitalized, and they appear on the right, which is more convenient to type and read. It is also more consistent with our type annotations.

[konnov]

This is a purely usability feature. @Kukovec what do you think?

[Kukovec]

I have no strong attachments to either syntax, if you like this one more we can easily change it.