Recover variables connected to parameters as possible parameters during abduction. Clean away introduced variables from abduction answer, if possible.
Sort candidates before abduction. Expand the candidates for invariants to connected atoms: TODO.
New validate includes other sorts even in abduction for terms.
Removed quantifier modification -- affected variables should be parameters, not existentials.
New approach to parameters: for abduction of invariants, all existential types are potential parameters. Dedicated type for passing parameters.
Reworked unification / abduction parameters. Test for parameter connectedness. Distribute abduction result according to potential parameters (not implemented yet).
Abduction check_connected bug fix. Printing VarSet.
Split abduction answer according to new params handling.
Abduction for terms: reordering choices to return maximally general answers.
Work needed on integration of term abduction with other sorts (i.e. arithmetic abduction).