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add "legacy" support for theory case splits

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this replicates what was done in theory_str to add axioms excluding each
pair of literals from being assigned True at the same time;
no new heuristics are being used in smt_context (yet)
This commit is contained in:
Murphy Berzish 2016-12-16 15:50:03 -05:00
parent dd8cd8199b
commit e85f9d33c4
4 changed files with 49 additions and 8 deletions
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8
src/smt/smt_context.h
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@ -805,6 +805,14 @@ namespace smt {
void mk_th_axiom(theory_id tid, literal l1, literal l2, literal l3, unsigned num_params = 0, parameter * params = 0);
/*
* Provide a hint to the core solver that the specified literals form a "theory case split".
* The core solver will enforce the condition that exactly one of these literals can be
* assigned 'true' at any time.
* We assume that the theory solver has already asserted the disjunction of these literals
* or some other axiom that means at least one of them must be assigned 'true'.
*/
void mk_th_case_split(unsigned num_lits, literal * lits);
bool_var mk_bool_var(expr * n);