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Dev (#63)
* introduce int_solver.h Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * add int_solver class Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * track which var is an integer Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add queries for integrality of vars Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * resurrect lp_tst in its own director lp Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add file Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add_constraint has got a body Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * fix add_constraint and substitute_terms_in_linear_expression Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * after merge with Z3Prover Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * adding stub check_int_feasibility() Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * Dev (#50) * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * small fix in lar_solver.cpp Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * adding some content to the new check_int_feasibility() Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * Dev (#51) * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding more nlsat Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * nlsat integration Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding constraints Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * add missing initialization Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * test Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * Dev (#53) * change in a comment Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * Disabled debug output * removing FOCI2 interface from interp * remove foci reference from cmakelist.txt Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding more nlsat Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * nlsat integration Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding constraints Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * add missing initialization Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * debugging nra Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * updates to nra_solver integration to call it directly from theory_lra instead of over lar_solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * n/a Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * integrate nlsat Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * tidy Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * preserve is_int flag Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * remove a debug printout Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * Dev (#54) * change in a comment Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * Disabled debug output * removing FOCI2 interface from interp * remove foci reference from cmakelist.txt Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * initial skeletons for nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding more nlsat Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * nlsat integration Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding constraints Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * add missing initialization Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * adding nra Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * debugging nra Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * updates to nra_solver integration to call it directly from theory_lra instead of over lar_solver Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * n/a Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * integrate nlsat Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * tidy Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * use integer test from lra solver, updated it to work on term variables Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * fix equality check in assume-eq Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * fix model_is_int_feasible Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * untested gcd_test() Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * call fill_explanation_from_fixed_columns() Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add the call to pivot_fixed_vars_from_basis() to int_solver.cpp::check() Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * port more of theory_arith_int.h Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * use statistics of lar_solver by theory_lra.cpp Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * port more code to int_solver.cpp Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add an assert Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * more int porting Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * fix a bug in pivot_fixed_vars_from_basis Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * small change Signed-off-by: Lev Nachmanson <levnach@hotmail.com> * implement find_inf_int_base_column() Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * catch unregistered vars in add_var_bound Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add a file Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * compile for vs2012 Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * fix asserts in add_var_bound Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * fix the lp_solver init when workig on an mps file Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * towards int_solver::check() Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * change in int_solver::check() signature Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add handlers for lia moves Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * spacing Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * return branch from int_solver::check() Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * add a stub for mk_gomory_cut Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * Dev (#59) * add handlers for lia moves Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * spacing Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * Dev (#60) * add handlers for lia moves Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * spacing Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * Dev (#61) * add handlers for lia moves Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * spacing Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * more TRACE(arith_int) Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * fix the build Signed-off-by: Lev Nachmanson <levnach@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * Dev (#62) * add handlers for lia moves Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * spacing Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * loops Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * build fix Signed-off-by: Lev Nachmanson <levnach@microsoft.com>
This commit is contained in:
Nikolaj Bjorner
Lev Nachmanson
parent
c82aa5edce
commit
8bd029c657
4 changed files with 276 additions and 44 deletions
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@ -55,13 +55,15 @@ namespace lra_lp {
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class bound {
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smt::bool_var m_bv;
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smt::theory_var m_var;
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bool m_is_int;
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rational m_value;
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bound_kind m_bound_kind;
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public:
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bound(smt::bool_var bv, smt::theory_var v, rational const & val, bound_kind k):
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bound(smt::bool_var bv, smt::theory_var v, bool is_int, rational const & val, bound_kind k):
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m_bv(bv),
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m_var(v),
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m_is_int(is_int),
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m_value(val),
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m_bound_kind(k) {
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}
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@ -69,12 +71,20 @@ namespace lra_lp {
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smt::theory_var get_var() const { return m_var; }
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smt::bool_var get_bv() const { return m_bv; }
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bound_kind get_bound_kind() const { return m_bound_kind; }
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bool is_int() const { return m_is_int; }
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rational const& get_value() const { return m_value; }
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inf_rational get_value(bool is_true) const {
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if (is_true) return inf_rational(m_value); // v >= value or v <= value
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if (m_bound_kind == lower_t) return inf_rational(m_value, false); // v <= value - epsilon
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return inf_rational(m_value, true); // v >= value + epsilon
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}
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if (m_is_int) {
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if (m_bound_kind == lower_t) return inf_rational(m_value - rational::one()); // v <= value - 1
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return inf_rational(m_value + rational::one()); // v >= value + 1
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}
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else {
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if (m_bound_kind == lower_t) return inf_rational(m_value, false); // v <= value - epsilon
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return inf_rational(m_value, true); // v >= value + epsilon
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}
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}
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virtual std::ostream& display(std::ostream& out) const {
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return out << "v" << get_var() << " " << get_bound_kind() << " " << m_value;
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}
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@ -306,7 +316,6 @@ namespace smt {
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}
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}
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void found_not_handled(expr* n) {
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m_not_handled = n;
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if (is_app(n) && is_underspecified(to_app(n))) {
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@ -762,7 +771,7 @@ namespace smt {
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found_not_handled(atom);
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return true;
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}
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lra_lp::bound* b = alloc(lra_lp::bound, bv, v, r, k);
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lp::bound* b = alloc(lp::bound, bv, v, is_int(v), r, k);
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m_bounds[v].push_back(b);
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updt_unassigned_bounds(v, +1);
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m_bounds_trail.push_back(v);
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@ -1217,33 +1226,49 @@ namespace smt {
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return FC_GIVEUP;
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}
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// create a bound atom representing term >= k
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lp::bound* mk_bound(lean::lar_term const& term, rational const& k) {
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NOT_IMPLEMENTED_YET();
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lp::bound_kind bkind = lp::bound_kind::lower_t;
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bool_var bv = null_bool_var;
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theory_var v = null_theory_var;
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lp::bound* result = alloc(lp::bound, bv, v, k, bkind);
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return result;
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// create a bound atom representing term <= k
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app_ref mk_bound(lean::lar_term const& term, rational const& k) {
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SASSERT(k.is_int());
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app_ref t = mk_term(term, true);
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app_ref atom(a.mk_le(t, a.mk_numeral(k, true)), m);
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TRACE("arith", tout << atom << "\n";
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m_solver->print_term(term, tout << "bound atom: "); tout << " <= " << k << "\n";
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display(tout);
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);
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ctx().internalize(atom, true);
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ctx().mark_as_relevant(atom.get());
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return atom;
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}
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lbool check_lia() {
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std::cout << "called check_lia()\n";
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if (m.canceled()) return l_undef;
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lean::lar_term term;
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lean::mpq k;
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lean::explanation ex; // TBD, this should be streamlined accross different explanations
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switch(m_lia->check(term, k, ex)) {
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case lean::lia_move::ok:
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return l_true;
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case lean::lia_move::branch:
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case lean::lia_move::branch: {
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(void)mk_bound(term, k);
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// branch on term <= k
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NOT_IMPLEMENTED_YET();
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// at this point we have a new unassigned atom that the
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// SAT core assigns a value to
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return l_false;
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case lean::lia_move::cut:
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}
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case lean::lia_move::cut: {
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// m_explanation implies term <= k
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m_explanation = ex.m_explanation;
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NOT_IMPLEMENTED_YET();
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app_ref b = mk_bound(term, k);
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m_eqs.reset();
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m_core.reset();
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m_params.reset();
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for (auto const& ev : ex.m_explanation) {
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if (!ev.first.is_zero()) {
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set_evidence(ev.second);
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}
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}
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assign(literal(ctx().get_bool_var(b), false));
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return l_false;
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}
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case lean::lia_move::conflict:
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// ex contains unsat core
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m_explanation = ex.m_explanation;
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@ -2052,7 +2077,15 @@ namespace smt {
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++m_stats.m_assert_upper;
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}
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auto vi = get_var_index(b.get_var());
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auto ci = m_solver->add_var_bound(vi, k, b.get_value());
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rational bound = b.get_value();
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lean::constraint_index ci;
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if (is_int && !is_true) {
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rational bound = b.get_value(false).get_rational();
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ci = m_solver->add_var_bound(vi, k, bound);
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}
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else {
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ci = m_solver->add_var_bound(vi, k, b.get_value());
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}
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TRACE("arith", tout << "v" << b.get_var() << "\n";);
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add_ineq_constraint(ci, literal(bv, !is_true));
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@ -2522,8 +2555,21 @@ namespace smt {
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expr* o = get_enode(w)->get_owner();
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args.push_back(a.mk_mul(a.mk_numeral(ti.second, is_int), o));
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}
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}
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if (!term.m_v.is_zero()) {
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args.push_back(a.mk_numeral(term.m_v, is_int));
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return app_ref(a.mk_add(args.size(), args.c_ptr()), m);
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}
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if (args.size() == 1) {
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return app_ref(to_app(args[0].get()), m);
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}
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return app_ref(a.mk_add(args.size(), args.c_ptr()), m);
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}
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app_ref mk_obj(theory_var v) {
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lean::var_index vi = m_theory_var2var_index[v];
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bool is_int = a.is_int(get_enode(v)->get_owner());
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if (m_solver->is_term(vi)) {
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return mk_term(m_solver->get_term(vi), is_int);
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}
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else {
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theory_var w = m_var_index2theory_var[vi];
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