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adding trail/levels

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-01-29 14:45:51 -08:00
parent e22c657811
commit 8d20310758
21 changed files with 199 additions and 7 deletions
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8
src/solver/solver.h
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@ -243,9 +243,13 @@ public:
/**
\brief extract units from solver.
*/
expr_ref_vector get_units(ast_manager& m);
expr_ref_vector get_units();
expr_ref_vector get_non_units(ast_manager& m);
expr_ref_vector get_non_units();
virtual expr_ref_vector get_trail() = 0; // { return expr_ref_vector(get_manager()); }
virtual void get_levels(ptr_vector<expr> const& vars, unsigned_vector& depth) = 0;
class scoped_push {
solver& s;