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https://github.com/Z3Prover/z3
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85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
/*++
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Copyright (c) 2015 Microsoft Corporation
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Module Name:
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qe_mbp.h
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Abstract:
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Model-based projection utilities
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Author:
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Nikolaj Bjorner (nbjorner) 2015-5-28
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Revision History:
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--*/
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#ifndef __QE_MBP_H__
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#define __QE_MBP_H__
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#include "ast.h"
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#include "params.h"
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#include "model.h"
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#include "model_based_opt.h"
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namespace qe {
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struct cant_project {};
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class project_plugin {
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public:
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virtual ~project_plugin() {}
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virtual bool operator()(model& model, app* var, app_ref_vector& vars, expr_ref_vector& lits) = 0;
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virtual bool solve(model& model, app_ref_vector& vars, expr_ref_vector& lits) = 0;
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virtual family_id get_family_id() = 0;
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virtual bool operator()(model& model, app_ref_vector& vars, expr_ref_vector& lits) { return false; };
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static expr_ref pick_equality(ast_manager& m, model& model, expr* t);
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static void partition_values(model& model, expr_ref_vector const& vals, expr_ref_vector& lits);
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static void partition_args(model& model, app_ref_vector const& sels, expr_ref_vector& lits);
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static void erase(expr_ref_vector& lits, unsigned& i);
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static void push_back(expr_ref_vector& lits, expr* lit);
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};
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class mbp {
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class impl;
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impl * m_impl;
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public:
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mbp(ast_manager& m);
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~mbp();
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/**
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\brief
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Apply model-based qe on constants provided as vector of variables.
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Return the updated formula and updated set of variables that were not eliminated.
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*/
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void operator()(bool force_elim, app_ref_vector& vars, model& mdl, expr_ref_vector& fmls);
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/**
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\brief
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Solve as many variables as possible using "cheap" quantifier elimination"
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*/
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void solve(model& model, app_ref_vector& vars, expr_ref_vector& lits);
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/**
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\brief
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Extract literals from formulas based on model.
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*/
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void extract_literals(model& model, expr_ref_vector& lits);
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/**
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\brief
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Maximize objective t under current model for constraints in fmls.
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*/
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opt::inf_eps maximize(expr_ref_vector const& fmls, model& mdl, app* t, expr_ref& bound);
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};
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}
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#endif
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