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https://github.com/Z3Prover/z3
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73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
/*++
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Copyright (c) 2013 Microsoft Corporation
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Module Name:
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dl_mk_karr_invariants.h
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Abstract:
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Extract integer linear invariants.
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Author:
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Nikolaj Bjorner (nbjorner) 2013-03-08
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Revision History:
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--*/
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#pragma once
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#include "muz/base/dl_context.h"
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#include "muz/base/dl_rule_set.h"
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#include "muz/base/dl_rule_transformer.h"
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#include "ast/arith_decl_plugin.h"
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#include "math/hilbert/hilbert_basis.h"
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namespace datalog {
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/**
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\brief Rule transformer that strengthens bodies with invariants.
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*/
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struct matrix {
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vector<vector<rational> > A;
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vector<rational> b;
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bool_vector eq;
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unsigned size() const { return A.size(); }
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void reset() { A.reset(); b.reset(); eq.reset(); }
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void append(matrix const& other) { A.append(other.A); b.append(other.b); eq.append(other.eq); }
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void display(std::ostream& out) const;
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static void display_row(
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std::ostream& out, vector<rational> const& row, rational const& b, bool is_eq);
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static void display_ineq(
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std::ostream& out, vector<rational> const& row, rational const& b, bool is_eq);
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};
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class mk_karr_invariants : public rule_transformer::plugin {
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class add_invariant_model_converter;
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context& m_ctx;
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ast_manager& m;
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rule_manager& rm;
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context m_inner_ctx;
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arith_util a;
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obj_map<func_decl, expr*> m_fun2inv;
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ast_ref_vector m_pinned;
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void get_invariants(rule_set const& src);
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void update_body(rule_set& result, rule& r);
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rule_set* update_rules(rule_set const& src);
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public:
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mk_karr_invariants(context & ctx, unsigned priority);
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rule_set * operator()(rule_set const & source) override;
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};
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};
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