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add tc and trc functionals for binary relations

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-04-09 22:58:43 +02:00
parent ae982c5225
commit 182039eb44
3 changed files with 30 additions and 8 deletions
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18
src/api/python/z3/z3.py
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@ -10379,10 +10379,16 @@ def Range(lo, hi, ctx = None):
# Special Relations
def PartialOrder(n, s):
ctx = s.ctx
return FuncDeclRef(Z3_mk_partial_order(ctx, n, s.ast), ctx)
def TransitiveClosure(f):
"""Given a binary relation R, such that the two arguments have the same sort
create the transitive closure relation R+.
The transitive closure R+ is a new relation.
"""
return FuncDeclRef(Z3_mk_transitive_closure(f.ctx_ref(), f.ast), f.ctx)
def TreeOrder(n, s):
ctx = s.ctx
return FuncDeclRef(Z3_mk_tree_order(ctx, n, s.ast), ctx)
def TransitiveReflexiveClosure(f):
"""Given a binary relation R, such that the two arguments have the same sort
create the transitive reflexive closure relation R*.
The transitive reflexive closure R* is a new relation.
"""
return FuncDeclRef(Z3_mk_transitive_reflexive_closure(f.ctx_ref(), f.ast), f.ctx)