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seq

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2015-12-08 21:03:28 -08:00
parent 24de0a9b90
commit 94bd2fdbe4
7 changed files with 285 additions and 78 deletions
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26
src/smt/theory_seq_empty.h
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@ -25,22 +25,44 @@ Revision History:
namespace smt {
class seq_factory : public value_factory {
typedef hashtable<symbol, symbol_hash_proc, symbol_eq_proc> symbol_set;
ast_manager& m;
proto_model& m_model;
seq_util u;
symbol_set m_strings;
unsigned m_next;
std::string m_unique_prefix;
obj_map<sort, expr*> m_unique_sequences;
expr_ref_vector m_trail;
public:
seq_factory(ast_manager & m, family_id fid, proto_model & md):
value_factory(m, fid),
m(m),
m_model(md),
u(m),
m_next(0)
m_next(0),
m_unique_prefix("#B"),
m_trail(m)
{
m_strings.insert(symbol(""));
m_strings.insert(symbol("a"));
m_strings.insert(symbol("b"));
}
void add_trail(expr* e) {
m_trail.push_back(e);
}
void set_prefix(char const* p) {
m_unique_prefix = p;
}
// generic method for setting unique sequences
void set_prefix(expr* uniq) {
m_trail.push_back(uniq);
m_unique_sequences.insert(m.get_sort(uniq), uniq);
}
virtual expr* get_some_value(sort* s) {
if (u.is_string(s))
return u.str.mk_string(symbol(""));
@ -60,7 +82,7 @@ namespace smt {
if (u.is_string(s)) {
while (true) {
std::ostringstream strm;
strm << "S" << m_next++;
strm << m_unique_prefix << m_next++;
symbol sym(strm.str().c_str());
if (m_strings.contains(sym)) continue;
m_strings.insert(sym);