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mbp (#4741)

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* adding dt-solver

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* dt

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* move mbp to self-contained module

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* files

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* Create CMakeLists.txt

* dt

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* rename to bool_var2expr to indicate type class

* mbp

* na

* add projection

* na

* na

* na

* na

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* deps

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* testing arith/q

* na

* newline for model printing

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-10-21 15:48:40 -07:00 • committed by GitHub
parent e5cc613bf1
commit 72d407a49f
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51 changed files with 903 additions and 618 deletions
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59
src/sat/smt/q_model_fixer.cpp
View file

@ -41,20 +41,18 @@ namespace q {
}
class arith_projection : public projection_function {
ast_manager& m;
arith_util a;
public:
arith_projection(ast_manager& m): m(m), a(m) {}
arith_projection(ast_manager& m): projection_function(m), a(m) {}
~arith_projection() override {}
bool operator()(expr* e1, expr* e2) const override { return lt(a, e1, e2); }
expr* mk_lt(expr* x, expr* y) override { return a.mk_lt(x, y); }
};
class ubv_projection : public projection_function {
ast_manager& m;
bv_util bvu;
public:
ubv_projection(ast_manager& m): m(m), bvu(m) {}
ubv_projection(ast_manager& m): projection_function(m), bvu(m) {}
~ubv_projection() override {}
bool operator()(expr* e1, expr* e2) const override { return lt(bvu, e1, e2); }
expr* mk_lt(expr* x, expr* y) override { return m.mk_not(bvu.mk_ule(y, x)); }
@ -113,6 +111,7 @@ namespace q {
void model_fixer::add_projection_functions(model& mdl, func_decl* f) {
// update interpretation of f so that the graph of f is fully determined by the
// ground values of its arguments.
TRACE("q", tout << mdl << "\n";);
func_interp* fi = mdl.get_func_interp(f);
if (!fi)
return;
@ -133,6 +132,7 @@ namespace q {
new_fi->set_else(m.mk_app(f_new, args));
mdl.update_func_interp(f, new_fi);
mdl.register_decl(f_new, fi);
TRACE("q", tout << mdl << "\n";);
}
expr_ref model_fixer::add_projection_function(model& mdl, func_decl* f, unsigned idx) {
@ -209,4 +209,55 @@ namespace q {
fns.insert(to_app(t)->get_decl());
}
}
expr* model_fixer::invert_app(app* t, expr* value) {
euf::enode* r = nullptr;
TRACE("q",
tout << "invert-app " << mk_pp(t, m) << " = " << mk_pp(value, m) << "\n";
if (ctx.values2root().find(value, r))
tout << "inverse " << mk_pp(r->get_expr(), m) << "\n";);
if (ctx.values2root().find(value, r))
return r->get_expr();
return value;
}
expr* model_fixer::invert_arg(app* t, unsigned i, expr* value) {
TRACE("q", tout << "invert-arg " << mk_pp(t, m) << " " << i << " " << mk_pp(value, m) << "\n";);
auto const* md = get_projection_data(t->get_decl(), i);
if (!md)
return m.mk_true();
auto* proj = get_projection(t->get_decl()->get_domain(i));
if (!proj)
return m.mk_true();
unsigned sz = md->values.size();
if (sz <= 1)
return m.mk_true();
//
// md->values are sorted
// v1, v2, v3
// x < v2 => f(x) = f(v1), so x < t2, where M(v2) = t2
// v2 <= x < v3 => f(x) = f(v2), so t2 <= x < t3, where M(v3) = t3
// v3 <= x => f(x) = f(v3)
//
auto is_lt = [&](expr* val) {
return (*proj)(value, val);
};
auto term = [&](unsigned j) {
return md->v2t[md->values[j]];
};
expr* arg = t->get_arg(i);
if (is_lt(md->values[1]))
return proj->mk_lt(arg, term(1));
for (unsigned j = 2; j < sz; ++j)
if (is_lt(md->values[j]))
return m.mk_and(proj->mk_le(term(j-1), arg), proj->mk_lt(arg, term(j)));
return proj->mk_le(term(sz-1), arg);
}
}