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add basic built-in consequence finding

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-07-28 11:20:17 -07:00
parent b7de813c63
commit 14f29e7265
6 changed files with 200 additions and 13 deletions
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22
src/api/python/z3.py
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@ -6123,6 +6123,28 @@ class Solver(Z3PPObject):
"""
return AstVector(Z3_solver_get_unsat_core(self.ctx.ref(), self.solver), self.ctx)
def consequences(self, assumptions, variables):
"""Determine fixed values for the variables based on the solver state and assumptions.
documentation TBD
"""
if isinstance(assumptions, list):
_asms = AstVector(None, self.ctx)
for a in assumptions:
_asms.push(a)
assumptions = _asms
if isinstance(variables, list):
_vars = AstVector(None, self.ctx)
for a in variables:
_vars.push(a)
variables = _vars
_z3_assert(isinstance(assumptions, AstVector), "ast vector expected")
_z3_assert(isinstance(variables, AstVector), "ast vector expected")
consequences = AstVector(None, self.ctx)
r = Z3_solver_get_consequences(self.ctx.ref(), self.solver, assumptions.vector, variables.vector, consequences.vector)
sz = len(consequences)
consequences = [ consequences[i] for i in range(sz) ]
return CheckSatResult(r), consequences
def proof(self):
"""Return a proof for the last `check()`. Proof construction must be enabled."""
return _to_expr_ref(Z3_solver_get_proof(self.ctx.ref(), self.solver), self.ctx)