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BDD vectors: add subtract and quot_rem, move finite domain abstraction out of bdd_manager (#5201)

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* Coding style

* Simplify bddv class

* mk_eq: run loop from below

* Add unit test for bddv unsigned comparison

* Add test that shows contains_num/find_num fail after reordering

* Add BDD vector subtraction

* Call apply_rec in mk_ite_rec instead of apply

* Question about mk_quant

* Implement quot_rem over BDD vectors

* Move shl/shr to bddv

* Make unit test smaller

* Add class dd::fdd to manage association between BDDs and numbers

* Remove contains_num/find_num from bdd_manager
This commit is contained in:
Jakob Rath 2021-04-20 18:09:32 +02:00 • committed by GitHub
parent bc695a5a97
commit 77350d97da
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10 changed files with 494 additions and 301 deletions
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6
src/math/polysat/solver.h
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@ -45,7 +45,7 @@ namespace polysat {
reslimit& m_lim;
scoped_ptr_vector<dd::pdd_manager> m_pdd;
scoped_ptr_vector<unsigned_vector> m_bits;
scoped_ptr_vector<dd::fdd> m_bits;
dd::bdd_manager m_bdd;
dep_value_manager m_value_manager;
small_object_allocator m_alloc;
@ -132,7 +132,7 @@ namespace polysat {
/**
* Find a next viable value for variable.
*/
dd::find_result find_viable(pvar v, rational & val);
dd::find_t find_viable(pvar v, rational & val);
/** Log all viable values for the given variable.
* (Inefficient, but useful for debugging small instances.)
@ -147,7 +147,7 @@ namespace polysat {
void del_var();
dd::pdd_manager& sz2pdd(unsigned sz);
unsigned_vector const& sz2bits(unsigned sz);
dd::fdd const& sz2bits(unsigned sz);
void push_level();
void pop_levels(unsigned num_levels);