mirror of
https://github.com/Z3Prover/z3
synced 2025-04-28 19:35:50 +00:00
Cleaned up FP predicates in the Python API. Fixes #2323.
This commit is contained in:
Christoph M. Wintersteiger
parent
e0dc05c97e
commit
df4065536f
1 changed files with 55 additions and 64 deletions
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@ -61,7 +61,7 @@ def z3_debug():
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if sys.version < '3':
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def _is_int(v):
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return isinstance(v, (int, long))
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return isinstance(v, (int, long))
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else:
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def _is_int(v):
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return isinstance(v, int)
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@ -191,7 +191,7 @@ class Context:
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Z3_del_config(conf)
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def __del__(self):
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Z3_del_context(self.ctx)
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Z3_del_context(self.ctx)
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self.ctx = None
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self.eh = None
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@ -322,7 +322,7 @@ class AstRef(Z3PPObject):
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def __nonzero__(self):
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return self.__bool__()
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def __bool__(self):
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if is_true(self):
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return True
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@ -728,9 +728,9 @@ class FuncDeclRef(AstRef):
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if k == Z3_PARAMETER_INT:
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result[i] = Z3_get_decl_int_parameter(self.ctx_ref(), self.ast, i)
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elif k == Z3_PARAMETER_DOUBLE:
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result[i] = Z3_get_decl_double_parameter(self.ctx_ref(), self.ast, i)
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result[i] = Z3_get_decl_double_parameter(self.ctx_ref(), self.ast, i)
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elif k == Z3_PARAMETER_RATIONAL:
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result[i] = Z3_get_decl_rational_parameter(self.ctx_ref(), self.ast, i)
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result[i] = Z3_get_decl_rational_parameter(self.ctx_ref(), self.ast, i)
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elif k == Z3_PARAMETER_SYMBOL:
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result[i] = Z3_get_decl_symbol_parameter(self.ctx_ref(), self.ast, i)
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elif k == Z3_PARAMETER_SORT:
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@ -1318,7 +1318,7 @@ def FreshConst(sort, prefix='c'):
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"""Create a fresh constant of a specified sort"""
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ctx = _get_ctx(sort.ctx)
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return _to_expr_ref(Z3_mk_fresh_const(ctx.ref(), prefix, sort.ast), ctx)
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def Var(idx, s):
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"""Create a Z3 free variable. Free variables are used to create quantified formulas.
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@ -1399,14 +1399,14 @@ class BoolRef(ExprRef):
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def __rmul__(self, other):
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return self * other
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def __mul__(self, other):
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"""Create the Z3 expression `self * other`.
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"""
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if other == 1:
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return self
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if other == 0:
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return 0
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return 0
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return If(self, other, 0)
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@ -1996,7 +1996,7 @@ def _mk_quantifier(is_forall, vs, body, weight=1, qid="", skid="", patterns=[],
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_z3_assert(is_bool(body) or is_app(vs) or (len(vs) > 0 and is_app(vs[0])), "Z3 expression expected")
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_z3_assert(is_const(vs) or (len(vs) > 0 and all([ is_const(v) for v in vs])), "Invalid bounded variable(s)")
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_z3_assert(all([is_pattern(a) or is_expr(a) for a in patterns]), "Z3 patterns expected")
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_z3_assert(all([is_expr(p) for p in no_patterns]), "no patterns are Z3 expressions")
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_z3_assert(all([is_expr(p) for p in no_patterns]), "no patterns are Z3 expressions")
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if is_app(vs):
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ctx = vs.ctx
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vs = [vs]
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@ -4163,7 +4163,7 @@ def BVSubNoOverflow(a, b):
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_check_bv_args(a, b)
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a, b = _coerce_exprs(a, b)
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return BoolRef(Z3_mk_bvsub_no_overflow(a.ctx_ref(), a.as_ast(), b.as_ast()), a.ctx)
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def BVSubNoUnderflow(a, b, signed):
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"""A predicate the determines that bit-vector subtraction does not underflow"""
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@ -4223,7 +4223,7 @@ class ArraySortRef(SortRef):
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>>> A.range()
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Bool
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"""
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return _to_sort_ref(Z3_get_array_sort_range(self.ctx_ref(), self.ast), self.ctx)
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return _to_sort_ref(Z3_get_array_sort_range(self.ctx_ref(), self.ast), self.ctx)
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class ArrayRef(ExprRef):
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"""Array expressions. """
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@ -4378,7 +4378,7 @@ def ArraySort(*sig):
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return ArraySortRef(Z3_mk_array_sort(ctx.ref(), d.ast, r.ast), ctx)
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dom = (Sort * arity)()
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for i in range(arity):
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dom[i] = sig[i].ast
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dom[i] = sig[i].ast
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return ArraySortRef(Z3_mk_array_sort_n(ctx.ref(), arity, dom, r.ast), ctx)
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def Array(name, dom, rng):
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@ -4456,7 +4456,7 @@ def Select(a, i):
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_z3_assert(is_array(a), "First argument must be a Z3 array expression")
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return a[i]
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def Map(f, *args):
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"""Return a Z3 map array expression.
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@ -4628,7 +4628,7 @@ def SetDifference(a, b):
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"""
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ctx = _ctx_from_ast_arg_list([a, b])
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return ArrayRef(Z3_mk_set_difference(ctx.ref(), a.as_ast(), b.as_ast()), ctx)
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def IsMember(e, s):
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""" Check if e is a member of set s
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>>> a = Const('a', SetSort(IntSort()))
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@ -4638,7 +4638,7 @@ def IsMember(e, s):
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ctx = _ctx_from_ast_arg_list([s,e])
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e = _py2expr(e, ctx)
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return BoolRef(Z3_mk_set_member(ctx.ref(), e.as_ast(), s.as_ast()), ctx)
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def IsSubset(a, b):
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""" Check if a is a subset of b
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>>> a = Const('a', SetSort(IntSort()))
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@ -4757,7 +4757,7 @@ class ScopedConstructorList:
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self.c = c
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self.ctx = ctx
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def __del__(self):
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if self.ctx.ref() is not None:
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if self.ctx.ref() is not None:
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Z3_del_constructor_list(self.ctx.ref(), self.c)
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def CreateDatatypes(*ds):
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@ -4953,7 +4953,7 @@ def TupleSort(name, sorts, ctx = None):
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"""Create a named tuple sort base on a set of underlying sorts
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Example:
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>>> pair, mk_pair, (first, second) = TupleSort("pair", [IntSort(), StringSort()])
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"""
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"""
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tuple = Datatype(name, ctx)
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projects = [ ('project%d' % i, sorts[i]) for i in range(len(sorts)) ]
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tuple.declare(name, *projects)
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@ -4970,8 +4970,8 @@ def DisjointSum(name, sorts, ctx=None):
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sum.declare("inject%d" % i, ("project%d" % i, sorts[i]))
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sum = sum.create()
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return sum, [(sum.constructor(i), sum.accessor(i, 0)) for i in range(len(sorts))]
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def EnumSort(name, values, ctx=None):
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"""Return a new enumeration sort named `name` containing the given values.
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@ -6679,7 +6679,7 @@ class Solver(Z3PPObject):
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return AstVector(Z3_solver_get_unsat_core(self.ctx.ref(), self.solver), self.ctx)
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def consequences(self, assumptions, variables):
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"""Determine fixed values for the variables based on the solver state and assumptions.
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"""Determine fixed values for the variables based on the solver state and assumptions.
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>>> s = Solver()
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>>> a, b, c, d = Bools('a b c d')
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>>> s.add(Implies(a,b), Implies(b, c))
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@ -6697,7 +6697,7 @@ class Solver(Z3PPObject):
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_vars = AstVector(None, self.ctx)
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for a in variables:
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_vars.push(a)
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variables = _vars
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variables = _vars
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_z3_assert(isinstance(assumptions, AstVector), "ast vector expected")
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_z3_assert(isinstance(variables, AstVector), "ast vector expected")
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consequences = AstVector(None, self.ctx)
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@ -6713,7 +6713,7 @@ class Solver(Z3PPObject):
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def from_string(self, s):
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"""Parse assertions from a string"""
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Z3_solver_from_string(self.ctx.ref(), self.solver, s)
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def cube(self, vars = None):
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"""Get set of cubes
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The method takes an optional set of variables that restrict which
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@ -6728,11 +6728,11 @@ class Solver(Z3PPObject):
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while True:
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lvl = self.backtrack_level
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self.backtrack_level = 4000000000
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r = AstVector(Z3_solver_cube(self.ctx.ref(), self.solver, self.cube_vs.vector, lvl), self.ctx)
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r = AstVector(Z3_solver_cube(self.ctx.ref(), self.solver, self.cube_vs.vector, lvl), self.ctx)
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if (len(r) == 1 and is_false(r[0])):
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return
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yield r
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if (len(r) == 0):
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return
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yield r
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if (len(r) == 0):
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return
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def cube_vars(self):
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@ -6745,7 +6745,7 @@ class Solver(Z3PPObject):
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def proof(self):
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"""Return a proof for the last `check()`. Proof construction must be enabled."""
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return _to_expr_ref(Z3_solver_get_proof(self.ctx.ref(), self.solver), self.ctx)
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def assertions(self):
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"""Return an AST vector containing all added constraints.
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@ -6771,7 +6771,7 @@ class Solver(Z3PPObject):
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return AstVector(Z3_solver_get_non_units(self.ctx.ref(), self.solver), self.ctx)
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def trail_levels(self):
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"""Return trail and decision levels of the solver state after a check() call.
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"""Return trail and decision levels of the solver state after a check() call.
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"""
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trail = self.trail()
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levels = (ctypes.c_uint * len(trail))()
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@ -6779,10 +6779,10 @@ class Solver(Z3PPObject):
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return trail, levels
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def trail(self):
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"""Return trail of the solver state after a check() call.
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"""Return trail of the solver state after a check() call.
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"""
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return AstVector(Z3_solver_get_trail(self.ctx.ref(), self.solver), self.ctx)
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def statistics(self):
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"""Return statistics for the last `check()`.
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@ -7443,7 +7443,7 @@ class Optimize(Z3PPObject):
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for i in range(num):
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_assumptions[i] = assumptions[i].as_ast()
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return CheckSatResult(Z3_optimize_check(self.ctx.ref(), self.optimize, num, _assumptions))
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def reason_unknown(self):
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"""Return a string that describes why the last `check()` returned `unknown`."""
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return Z3_optimize_get_reason_unknown(self.ctx.ref(), self.optimize)
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@ -7476,7 +7476,7 @@ class Optimize(Z3PPObject):
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def upper_values(self, obj):
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if not isinstance(obj, OptimizeObjective):
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raise Z3Exception("Expecting objective handle returned by maximize/minimize")
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return obj.upper_values()
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return obj.upper_values()
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def from_file(self, filename):
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"""Parse assertions and objectives from a file"""
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@ -8268,7 +8268,7 @@ def Product(*args):
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return 1
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ctx = _ctx_from_ast_arg_list(args)
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if ctx is None:
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return _reduce(lambda a, b: a * b, args, 1)
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return _reduce(lambda a, b: a * b, args, 1)
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args = _coerce_expr_list(args, ctx)
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if is_bv(args[0]):
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return _reduce(lambda a, b: a * b, args, 1)
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@ -8880,7 +8880,7 @@ class FPRef(ExprRef):
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def __neg__(self):
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"""Create the Z3 expression `-self`.
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>>> x = FP('x', Float32())
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>>> -x
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-x
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@ -8998,7 +8998,7 @@ def is_fprm_value(a):
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### FP Numerals
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class FPNumRef(FPRef):
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class FPNumRef(FPRef):
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"""The sign of the numeral.
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>>> x = FPVal(+1.0, FPSort(8, 24))
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@ -9015,7 +9015,7 @@ class FPNumRef(FPRef):
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return l.value != 0
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"""The sign of a floating-point numeral as a bit-vector expression.
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Remark: NaN's are invalid arguments.
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"""
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def sign_as_bv(self):
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@ -9041,7 +9041,7 @@ class FPNumRef(FPRef):
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if not Z3_fpa_get_numeral_significand_uint64(self.ctx.ref(), self.as_ast(), ptr):
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raise Z3Exception("error retrieving the significand of a numeral.")
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return ptr[0]
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"""The significand of the numeral as a bit-vector expression.
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Remark: NaN are invalid arguments.
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@ -9390,18 +9390,11 @@ def _mk_fp_unary(f, rm, a, ctx):
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_z3_assert(is_fp(a), "Second argument must be a Z3 floating-point expression")
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return FPRef(f(ctx.ref(), rm.as_ast(), a.as_ast()), ctx)
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def _mk_fp_unary_norm(f, a, ctx):
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ctx = _get_ctx(ctx)
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[a] = _coerce_fp_expr_list([a], ctx)
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if z3_debug():
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_z3_assert(is_fp(a), "First argument must be a Z3 floating-point expression")
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return BoolRef(f(ctx.ref(), a.as_ast()), ctx)
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def _mk_fp_unary_pred(f, a, ctx):
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ctx = _get_ctx(ctx)
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[a] = _coerce_fp_expr_list([a], ctx)
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if z3_debug():
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_z3_assert(is_fp(a) or is_fp(b), "Second or third argument must be a Z3 floating-point expression")
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_z3_assert(is_fp(a), "First argument must be a Z3 floating-point expression")
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return BoolRef(f(ctx.ref(), a.as_ast()), ctx)
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def _mk_fp_bin(f, rm, a, b, ctx):
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@ -9557,7 +9550,7 @@ def fpIsNaN(a, ctx=None):
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>>> fpIsNaN(x)
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fpIsNaN(x)
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"""
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return _mk_fp_unary_norm(Z3_mk_fpa_is_nan, a, ctx)
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return _mk_fp_unary_pred(Z3_mk_fpa_is_nan, a, ctx)
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def fpIsInf(a, ctx=None):
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"""Create a Z3 floating-point isInfinite expression.
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@ -9567,33 +9560,32 @@ def fpIsInf(a, ctx=None):
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>>> fpIsInf(x)
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fpIsInf(x)
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"""
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return _mk_fp_unary_norm(Z3_mk_fpa_is_infinite, a, ctx)
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return _mk_fp_unary_pred(Z3_mk_fpa_is_infinite, a, ctx)
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def fpIsZero(a, ctx=None):
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"""Create a Z3 floating-point isZero expression.
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"""
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return _mk_fp_unary_norm(Z3_mk_fpa_is_zero, a, ctx)
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return _mk_fp_unary_pred(Z3_mk_fpa_is_zero, a, ctx)
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def fpIsNormal(a, ctx=None):
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"""Create a Z3 floating-point isNormal expression.
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"""
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return _mk_fp_unary_norm(Z3_mk_fpa_is_normal, a, ctx)
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return _mk_fp_unary_pred(Z3_mk_fpa_is_normal, a, ctx)
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def fpIsSubnormal(a, ctx=None):
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"""Create a Z3 floating-point isSubnormal expression.
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"""
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return _mk_fp_unary_norm(Z3_mk_fpa_is_subnormal, a, ctx)
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return _mk_fp_unary_pred(Z3_mk_fpa_is_subnormal, a, ctx)
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def fpIsNegative(a, ctx=None):
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"""Create a Z3 floating-point isNegative expression.
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"""
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return _mk_fp_unary_norm(Z3_mk_fpa_is_negative, a, ctx)
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return _mk_fp_unary_pred(Z3_mk_fpa_is_negative, a, ctx)
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def fpIsPositive(a, ctx=None):
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"""Create a Z3 floating-point isPositive expression.
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"""
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return _mk_fp_unary_norm(Z3_mk_fpa_is_positive, a, ctx)
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return FPRef(Z3_mk_fpa_is_positive(a.ctx_ref(), a.as_ast()), a.ctx)
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return _mk_fp_unary_pred(Z3_mk_fpa_is_positive, a, ctx)
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def _check_fp_args(a, b):
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if z3_debug():
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@ -9732,7 +9724,7 @@ def fpToFP(a1, a2=None, a3=None, ctx=None):
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raise Z3Exception("Unsupported combination of arguments for conversion to floating-point term.")
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def fpBVToFP(v, sort, ctx=None):
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"""Create a Z3 floating-point conversion expression that represents the
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"""Create a Z3 floating-point conversion expression that represents the
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conversion from a bit-vector term to a floating-point term.
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>>> x_bv = BitVecVal(0x3F800000, 32)
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@ -9748,7 +9740,7 @@ def fpBVToFP(v, sort, ctx=None):
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return FPRef(Z3_mk_fpa_to_fp_bv(ctx.ref(), v.ast, sort.ast), ctx)
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def fpFPToFP(rm, v, sort, ctx=None):
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"""Create a Z3 floating-point conversion expression that represents the
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"""Create a Z3 floating-point conversion expression that represents the
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conversion from a floating-point term to a floating-point term of different precision.
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>>> x_sgl = FPVal(1.0, Float32())
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@ -9767,7 +9759,7 @@ def fpFPToFP(rm, v, sort, ctx=None):
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return FPRef(Z3_mk_fpa_to_fp_float(ctx.ref(), rm.ast, v.ast, sort.ast), ctx)
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def fpRealToFP(rm, v, sort, ctx=None):
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"""Create a Z3 floating-point conversion expression that represents the
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"""Create a Z3 floating-point conversion expression that represents the
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conversion from a real term to a floating-point term.
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||||
|
||||
>>> x_r = RealVal(1.5)
|
||||
|
|
@ -9784,7 +9776,7 @@ def fpRealToFP(rm, v, sort, ctx=None):
|
|||
return FPRef(Z3_mk_fpa_to_fp_real(ctx.ref(), rm.ast, v.ast, sort.ast), ctx)
|
||||
|
||||
def fpSignedToFP(rm, v, sort, ctx=None):
|
||||
"""Create a Z3 floating-point conversion expression that represents the
|
||||
"""Create a Z3 floating-point conversion expression that represents the
|
||||
conversion from a signed bit-vector term (encoding an integer) to a floating-point term.
|
||||
|
||||
>>> x_signed = BitVecVal(-5, BitVecSort(32))
|
||||
|
|
@ -9801,7 +9793,7 @@ def fpSignedToFP(rm, v, sort, ctx=None):
|
|||
return FPRef(Z3_mk_fpa_to_fp_signed(ctx.ref(), rm.ast, v.ast, sort.ast), ctx)
|
||||
|
||||
def fpUnsignedToFP(rm, v, sort, ctx=None):
|
||||
"""Create a Z3 floating-point conversion expression that represents the
|
||||
"""Create a Z3 floating-point conversion expression that represents the
|
||||
conversion from an unsigned bit-vector term (encoding an integer) to a floating-point term.
|
||||
|
||||
>>> x_signed = BitVecVal(-5, BitVecSort(32))
|
||||
|
|
@ -9936,7 +9928,7 @@ class SeqSortRef(SortRef):
|
|||
|
||||
def basis(self):
|
||||
return _to_sort_ref(Z3_get_seq_sort_basis(self.ctx_ref(), self.ast), self.ctx)
|
||||
|
||||
|
||||
|
||||
def StringSort(ctx=None):
|
||||
"""Create a string sort
|
||||
|
|
@ -9992,13 +9984,13 @@ class SeqRef(ExprRef):
|
|||
|
||||
def __le__(self, other):
|
||||
return SeqRef(Z3_mk_str_le(self.ctx_ref(), self.as_ast(), other.as_ast()), self.ctx)
|
||||
|
||||
|
||||
def __lt__(self, other):
|
||||
return SeqRef(Z3_mk_str_lt(self.ctx_ref(), self.as_ast(), other.as_ast()), self.ctx)
|
||||
|
||||
def __ge__(self, other):
|
||||
return SeqRef(Z3_mk_str_le(self.ctx_ref(), other.as_ast(), self.as_ast()), self.ctx)
|
||||
|
||||
|
||||
def __gt__(self, other):
|
||||
return SeqRef(Z3_mk_str_lt(self.ctx_ref(), other.as_ast(), self.as_ast()), self.ctx)
|
||||
|
||||
|
|
@ -10062,7 +10054,7 @@ def String(name, ctx=None):
|
|||
return SeqRef(Z3_mk_const(ctx.ref(), to_symbol(name, ctx), StringSort(ctx).ast), ctx)
|
||||
|
||||
def Strings(names, ctx=None):
|
||||
"""Return string constants"""
|
||||
"""Return string constants"""
|
||||
ctx = _get_ctx(ctx)
|
||||
if isinstance(names, str):
|
||||
names = names.split(" ")
|
||||
|
|
@ -10208,7 +10200,7 @@ def LastIndexOf(s, substr):
|
|||
s = _coerce_seq(s, ctx)
|
||||
substr = _coerce_seq(substr, ctx)
|
||||
return ArithRef(Z3_mk_seq_last_index(s.ctx_ref(), s.as_ast(), substr.as_ast()), s.ctx)
|
||||
|
||||
|
||||
|
||||
def Length(s):
|
||||
"""Obtain the length of a sequence 's'
|
||||
|
|
@ -10414,4 +10406,3 @@ def TransitiveClosure(f):
|
|||
The transitive closure R+ is a new relation.
|
||||
"""
|
||||
return FuncDeclRef(Z3_mk_transitive_closure(f.ctx_ref(), f.ast), f.ctx)
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue