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mbqi

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-10-25 10:29:02 -07:00
parent 34e0e26e3d
commit 1ee2ba2a9b
17 changed files with 132 additions and 80 deletions
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13
src/sat/smt/q_model_fixer.cpp
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@ -103,15 +103,17 @@ namespace q {
void model_fixer::add_projection_functions(model& mdl, ptr_vector<quantifier> const& qs) {
func_decl_set fns;
TRACE("q", tout << mdl << "\n";);
collect_partial_functions(qs, fns);
for (func_decl* f : fns)
add_projection_functions(mdl, f);
TRACE("q", tout << mdl << "\n";);
}
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;
@ -120,8 +122,12 @@ namespace q {
expr_ref_vector args(m);
for (unsigned i = 0; i < f->get_arity(); ++i)
args.push_back(add_projection_function(mdl, f, i));
if (!fi->get_else() && fi->num_entries() > 0)
fi->set_else(fi->get_entry(ctx.s().rand()(fi->num_entries()))->get_result());
if (!fi->get_else() && fi->num_entries() > 0) {
unsigned idx = ctx.s().rand()(fi->num_entries());
func_entry const* e = fi->get_entry(idx);
fi->set_else(e->get_result());
fi->del_entry(idx);
}
bool has_projection = false;
for (expr* arg : args)
has_projection |= !is_var(arg);
@ -132,7 +138,6 @@ 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) {