mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-08-03 01:40:22 +00:00
Code Activity

experimental feature to access congruence closure of SimpleSolver

Browse source 
This update includes an experimental feature to access a congruence closure data-structure after search.
It comes with several caveats as pre-processing is free to eliminate terms. It is therefore necessary to use a solver that does not eliminate the terms you want to track for congruence of. This is partially addressed by using SimpleSolver or incremental mode solving.

```python
from z3 import *
s = SimpleSolver()
x, y, z = Ints('x y z')
s.add(x == y)
s.add(y == z)
s.check()
print(s.root(x), s.root(y), s.root(z))
print(s.next(x), s.next(y), s.next(z))
```
This commit is contained in:
Nikolaj Bjorner 2022-12-30 21:41:27 -08:00
parent c0f1f33898
commit f6d411d54b
21 changed files with 145 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/smt/smt_solver.cpp
View file

@ -330,6 +330,10 @@ namespace {
m_context.get_units(units);
}
expr* congruence_next(expr* e) override { return m_context.congruence_next(e); }
expr* congruence_root(expr* e) override { return m_context.congruence_root(e); }
expr_ref_vector cube(expr_ref_vector& vars, unsigned cutoff) override {
ast_manager& m = get_manager();
if (!m_cuber) {