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58 lines
2.3 KiB
C++
58 lines
2.3 KiB
C++
/*++
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Copyright (c) 2020 Microsoft Corporation
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Author:
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Nikolaj Bjorner (nbjorner)
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Lev Nachmanson (levnach)
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--*/
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#pragma once
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#include "math/lp/nla_common.h"
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#include "math/lp/nla_intervals.h"
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#include "util/uint_set.h"
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namespace nla {
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class core;
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class monomial_bounds : common {
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dep_intervals& dep;
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bool should_propagate_lower(dep_interval const& range, lpvar v, unsigned p);
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bool should_propagate_upper(dep_interval const& range, lpvar v, unsigned p);
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void propagate_bound(lpvar v, lp::lconstraint_kind cmp, rational const& q, u_dependency* d);
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void var2interval(lpvar v, scoped_dep_interval& i);
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bool is_too_big(mpq const& q) const;
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bool propagate_down(monic const& m, lpvar u);
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bool propagate_value(dep_interval& range, lpvar v);
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bool propagate_value(dep_interval& range, lpvar v, unsigned power);
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void compute_product(unsigned start, monic const& m, scoped_dep_interval& i);
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bool propagate(monic const& m);
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void propagate_fixed_to_zero(monic const& m, lpvar fixed_to_zero);
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void propagate_fixed(monic const& m, rational const& k);
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void propagate_nonfixed(monic const& m, rational const& k, lpvar w);
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u_dependency* explain_fixed(monic const& m, rational const& k);
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lp::explanation get_explanation(u_dependency* dep);
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bool propagate_down(monic const& m, dep_interval& mi, lpvar v, unsigned power, dep_interval& product);
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void analyze_monomial(monic const& m, unsigned& num_free, lpvar& free_v, unsigned& power) const;
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bool is_free(lpvar v) const;
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bool is_zero(lpvar v) const;
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bool add_lemma();
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// monomial propagation
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void unit_propagate(monic & m);
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bool is_linear(monic const& m, lpvar& w, lpvar & fixed_to_zero);
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rational fixed_var_product(monic const& m, lpvar w);
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lpvar non_fixed_var(monic const& m);
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// fixed variable propagation
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unsigned m_fixed_var_qhead = 0;
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unsigned_vector m_fixed_var_trail;
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void propagate_fixed_vars();
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void propagate_fixed_var(lpvar v);
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void propagate_fixed_var(monic const& m, lpvar v);
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public:
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monomial_bounds(core* core);
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void propagate();
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void unit_propagate();
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};
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}
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