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adding preferred sat, currently disabled, to wmax. Fixing issue #815

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-11-30 09:52:05 -08:00
parent 441dbbb94b
commit 024082a45f
13 changed files with 887 additions and 405 deletions
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4
src/solver/solver.cpp
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@ -154,6 +154,10 @@ lbool solver::find_mutexes(expr_ref_vector const& vars, vector<expr_ref_vector>&
return l_true;
}
lbool solver::preferred_sat(expr_ref_vector const& asms, vector<expr_ref_vector>& cores) {
return check_sat(0, 0);
}
bool solver::is_literal(ast_manager& m, expr* e) {
return is_uninterp_const(e) || (m.is_not(e, e) && is_uninterp_const(e));
}

12
src/solver/solver.h
View file

@ -151,9 +151,9 @@ public:
/**
\brief under assumptions, asms, retrieve set of consequences that
fix values for expressions that can be built from vars.
The consequences are clauses whose first literal constrain one of the
functions from vars and the other literals are negations of literals from asms.
fix values for expressions that can be built from vars.
The consequences are clauses whose first literal constrain one of the
functions from vars and the other literals are negations of literals from asms.
*/
virtual lbool get_consequences(expr_ref_vector const& asms, expr_ref_vector const& vars, expr_ref_vector& consequences);
@ -166,6 +166,12 @@ public:
virtual lbool find_mutexes(expr_ref_vector const& vars, vector<expr_ref_vector>& mutexes);
/**
\brief Preferential SAT. Prefer assumptions to be true, produce cores that witness cases when not all assumptions can be met.
by default, preferred sat ignores the assumptions.
*/
virtual lbool preferred_sat(expr_ref_vector const& asms, vector<expr_ref_vector>& cores);
/**
\brief Display the content of this solver.
*/