3 commits

Author	SHA1	Message	Date
Jakob Rath	f7e476a4a0	Polysat: fixes in solver, forbidden intervals for eq_constraint (#5240) ... * Rename to neg_cond * Add some logging utilities * Implement case of forbidden interval covering the whole domain * Implement diseq_narrow * Do not activate constraint if we are in a conflict state * comments * Assert that lemma isn't undefined * Update revert_decision to work in the case where narrowing causes propagation * Fix case of non-disjunctive lemma from forbidden intervals * Conflict should not leak outside user scope * Add guard to decide(), some notes * Add test case * Add constraints to watchlist of unassigned variable during propagation * Move common propagation functionality into base class * Combine eq/diseq narrow * Compute forbidden interval for equality constraints by considering them as p <=u 0 (or p >u 0 for disequalities)	2021-05-03 09:30:17 -07:00
Jakob Rath	9e505d60f0	Separate constraint creation from activation; add sign/polarity to constraints (#5217) ... * Separate constraint creation from activation * Basic recursive handling of disjunctive lemmas for unit tests * Set learned constraint to true immediately * Preliminary support for negated constraints	2021-04-26 09:55:58 -07:00
Nikolaj Bjorner	9df7e9a029	add outline for ule constraints, change bit to var constraints ... Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>	2021-04-16 12:31:11 -07:00