move horn_subsume_model_converter to ast/converters

src/ast/converters/horn_subsume_model_converter.h

@@ -0,0 +1,84 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    horn_subsume_model_converter.h
+
+Abstract:
+
+    Model converter for redundant Horn clauses.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2012-9-16
+
+Revision History:
+
+    
+Notes:
+
+
+Subsumption transformation (remove Horn clause):
+
+    P(x) :- Body(x,y)      Rules
+    ----------------------------
+    Rules
+ 
+    
+    Model converter: 
+
+       P(x) := P(x) or (exists y. Body(x,y))
+
+--*/
+
+#pragma once
+
+#include "ast/converters/model_converter.h"
+#include "ast/rewriter/th_rewriter.h"
+
+class horn_subsume_model_converter : public model_converter {
+    ast_manager&    m;
+    func_decl_ref_vector m_funcs;
+    expr_ref_vector      m_bodies;
+    th_rewriter          m_rewrite;
+    app_ref_vector       m_delay_head;
+    expr_ref_vector      m_delay_body;
+
+    void add_default_false_interpretation(expr* e, model_ref& md);
+
+    struct add_default_proc {
+        ast_manager& m;
+        model_ref& m_md;
+        add_default_proc(ast_manager& m, model_ref& md): m(m), m_md(md) {}
+        void operator()(app* n);
+        void operator()(expr* n) {}
+    };
+
+public:
+
+    horn_subsume_model_converter(ast_manager& m): 
+        m(m), m_funcs(m), m_bodies(m), m_rewrite(m), m_delay_head(m), m_delay_body(m) {}
+
+    bool mk_horn(expr* clause, func_decl_ref& pred, expr_ref& body);
+
+    bool mk_horn(app* head, expr* body, func_decl_ref& pred, expr_ref& body_res);
+
+    void insert(app* head, expr* body);
+
+    void insert(app* head, unsigned sz, expr* const* body);
+
+    void insert(func_decl* p, expr* body) { m_funcs.push_back(p); m_bodies.push_back(body); }
+    
+    void operator()(model_ref& _m) override;
+
+    model_converter * translate(ast_translation & translator) override;
+
+    ast_manager& get_manager() { return m; }
+
+    void display(std::ostream & out) override {}
+
+    void get_units(obj_map<expr, bool>& units) override { units.reset(); }
+
+};
+