Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/smt_solver_strategy.cpp

@@ -0,0 +1,96 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    sat_solver_strategy.cpp
+
+Abstract:
+
+    Strategy for using the SMT solver.
+    
+Author:
+
+    Leonardo (leonardo) 2011-06-25
+
+Notes:
+
+--*/
+#include"smt_solver_strategy.h"
+#include"smt_solver_exp.h"
+
+smt_solver_strategy::smt_solver_strategy(ast_manager & _m, params_ref const & p):
+    m(_m),
+    m_params(p) {
+}
+
+smt_solver_strategy::~smt_solver_strategy() {
+}
+
+void smt_solver_strategy::init_solver() {
+    smt::solver_exp * new_solver = alloc(smt::solver_exp, m, m_params);
+    #pragma omp critical (as_st_cancel)
+    {
+        m_solver = new_solver;
+    }
+}
+
+void smt_solver_strategy::updt_params(params_ref const & p) {
+    m_params = p;
+}
+
+void smt_solver_strategy::get_param_descrs(param_descrs & r) {
+    // TODO
+}
+
+void smt_solver_strategy::operator()(assertion_set & s, model_converter_ref & mc) {
+    if (s.m().proofs_enabled())
+        throw smt_solver_exception("smt quick solver does not support proof generation");
+    mc = 0;
+    s.elim_redundancies();
+    if (s.inconsistent())
+        return;
+
+    init_solver();
+    m_solver->assert_set(s);
+    s.reset();
+    
+    lbool r = m_solver->check();
+    m_solver->collect_statistics(m_stats);
+
+    if (r == l_false) {
+        s.assert_expr(m.mk_false());
+    }
+    else if (r == l_true) {
+        model_ref md;
+        m_solver->get_model(md);
+        mc = model2model_converter(md.get());
+    }
+    else {
+        // recover simplified assertion set
+        m_solver->get_assertions(s);
+        m_solver->get_model_converter(mc);
+    }
+}
+
+void smt_solver_strategy::cleanup() {
+    if (m_solver)
+        m_solver->collect_statistics(m_stats);
+    #pragma omp critical (as_st_cancel)
+    {
+        m_solver = 0;
+    }
+}
+
+void smt_solver_strategy::set_cancel(bool f) {
+    if (m_solver)
+        m_solver->set_cancel(f);
+}
+
+void smt_solver_strategy::reset_statistics() {
+    m_stats.reset();
+}
+
+void smt_solver_strategy::collect_statistics(statistics & st) const {
+    st.copy(m_stats);
+}