diff options
author | Morgan Deters <mdeters@gmail.com> | 2012-02-22 20:08:57 +0000 |
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committer | Morgan Deters <mdeters@gmail.com> | 2012-02-22 20:08:57 +0000 |
commit | 7719c492e69e22f9bdf0ce84ecc41ba0a4423aee (patch) | |
tree | bcb5015c6c3d4789088b870105358bad2db5b68d /src/prop/sat.cpp | |
parent | 4aecb261e60bf3e2de0d6a59af8d3a55b608c273 (diff) |
Added OutputChannel::propagateAsDecision() functionality, allowing a theory
to request a decision on a literal. All these theory requests are kept in a
context-dependent queue and serviced in order when the SAT solver goes to make a
decision. Requests that don't have a SAT literal give an assert-fail. Requests
for literals that already have an assignment are silently ignored.
Since the queue is CD, requests can actually be serviced more than once (e.g., if
a request is made at DL 5, but not serviced until DL 10, and later, a conflict
backtracks to level 7, the request may be serviced again).
Performance impact: none to negligible for theories that don't use it
See http://church.cims.nyu.edu/regress-results/compare_jobs.php?job_id=3620&reference_id=3614&mode=&category=&p=0
Diffstat (limited to 'src/prop/sat.cpp')
-rw-r--r-- | src/prop/sat.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/prop/sat.cpp b/src/prop/sat.cpp index 7df7535dd..559467922 100644 --- a/src/prop/sat.cpp +++ b/src/prop/sat.cpp @@ -71,6 +71,11 @@ void SatSolver::enqueueTheoryLiteral(const SatLiteral& l) { d_theoryEngine->assertFact(literalNode); } +SatLiteral SatSolver::getNextDecisionRequest() { + TNode n = d_theoryEngine->getNextDecisionRequest(); + return n.isNull() ? Minisat::lit_Undef : d_cnfStream->getLiteral(n); +} + bool SatSolver::theoryNeedCheck() const { return d_theoryEngine->needCheck(); } |