SMT variable names are not always distinct

[joukestoel]

When defining two tuples with the same identifiers but with distinct other attributes values in the upper bound of an relation the name of the SMT variable representing these different tuples overlaps.

I.e.

R (id:id, i:int) <= {<id1,1>,<id1,2>}

In the translation the SMT variable name R_id1 is now assigned to both tuples.