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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-10-07 08:27:50 -07:00
parent b80ba24ba6
commit 49dfaeb406
3 changed files with 59 additions and 15 deletions
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31
src/sat/smt/q_model_fixer.h
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@ -40,8 +40,29 @@ namespace q {
class projection_function {
public:
virtual ~projection_function() {}
virtual void sort(ptr_buffer<expr>& values) = 0;
virtual expr* mk_lt(expr* a, expr* b) = 0;
virtual bool operator()(expr* a, expr* b) const = 0;
};
/**
* meta-data for a projection function for f at index idx (indexed-decl).
* The meta-data contains the set of model values that the idx'th argument of f
* has and a map from model values to terms and back.
*/
struct projection_meta_data {
projection_meta_data(ast_manager& m) : values(m) {}
expr_ref_vector values;
obj_map<expr, expr*> v2t;
obj_map<expr, expr*> t2v;
};
struct indexed_decl {
func_decl* f;
unsigned idx;
indexed_decl() : f(nullptr), idx(0) {}
indexed_decl(func_decl* f, unsigned idx): f(f), idx(idx) {}
struct hash { unsigned operator()(indexed_decl const& d) const { return d.idx + d.f->hash(); } };
struct eq { bool operator()(indexed_decl const& a, indexed_decl const& b) const { return a.idx == b.idx && a.f == b.f; } };
};
class model_fixer : public quantifier2macro_infos {
@ -51,6 +72,8 @@ namespace q {
obj_map<quantifier, quantifier_macro_info*> m_q2info;
func_decl_dependencies m_dependencies;
obj_map<sort, projection_function*> m_projections;
map<indexed_decl, projection_meta_data*, indexed_decl::hash, indexed_decl::eq> m_projection_data;
scoped_ptr_vector<projection_meta_data> m_projection_pinned;
void add_projection_functions(model& mdl, ptr_vector<quantifier> const& qs);
void add_projection_functions(model& mdl, func_decl* f);
@ -72,6 +95,12 @@ namespace q {
void operator()(model& mdl);
quantifier_macro_info* operator()(quantifier* q);
projection_meta_data* operator()(func_decl* f, unsigned idx) const {
projection_meta_data* r = nullptr;
m_projection_data.find(indexed_decl(f, idx), r);
return r;
}
};