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New API for adding 'tracked assertions'. Added wrappers for creating existential and universal quantifiers in the C++ API fronted. Added new examples for the C++ API

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2012-11-10 15:54:31 -08:00
parent 108bbb0597
commit caced62f40
5 changed files with 168 additions and 7 deletions
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23
src/api/python/z3.py
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@ -5743,7 +5743,30 @@ class Solver(Z3PPObject):
[x > 0, x < 2]
"""
self.assert_exprs(*args)
def assert_and_track(self, a, p):
"""Assert constraint `a` and track it in the unsat core using the Boolean constant `p`.
If `p` is a string, it will be automatically converted into a Boolean constant.
>>> x = Int('x')
>>> p3 = Bool('p3')
>>> s = Solver()
>>> s.set(unsat_core=True)
>>> s.assert_and_track(x > 0, 'p1')
>>> s.assert_and_track(x != 1, 'p2')
>>> s.assert_and_track(x < 0, p3)
>>> print s.check()
unsat
>>> print s.unsat_core()
[p3, p1]
"""
if isinstance(p, str):
p = Bool(p, self.ctx)
_z3_assert(isinstance(a, BoolRef), "Boolean expression expected")
_z3_assert(isinstance(p, BoolRef) and is_const(p), "Boolean expression expected")
Z3_solver_assert_and_track(self.ctx.ref(), self.solver, a.as_ast(), p.as_ast())
def check(self, *assumptions):
"""Check whether the assertions in the given solver plus the optional assumptions are consistent or not.