Public Member Functions | |
def | __init__ (self, solver=None, ctx=None, logFile=None) |
def | __del__ (self) |
def | set (self, *args, **keys) |
def | push (self) |
def | pop (self, num=1) |
def | num_scopes (self) |
def | reset (self) |
def | assert_exprs (self, *args) |
def | add (self, *args) |
def | __iadd__ (self, fml) |
def | append (self, *args) |
def | insert (self, *args) |
def | assert_and_track (self, a, p) |
def | check (self, *assumptions) |
def | model (self) |
def | import_model_converter (self, other) |
def | unsat_core (self) |
def | consequences (self, assumptions, variables) |
def | from_file (self, filename) |
def | from_string (self, s) |
def | cube (self, vars=None) |
def | cube_vars (self) |
def | proof (self) |
def | assertions (self) |
def | units (self) |
def | non_units (self) |
def | trail_levels (self) |
def | trail (self) |
def | statistics (self) |
def | reason_unknown (self) |
def | help (self) |
def | param_descrs (self) |
def | __repr__ (self) |
def | translate (self, target) |
def | __copy__ (self) |
def | __deepcopy__ (self, memo={}) |
def | sexpr (self) |
def | dimacs (self, include_names=True) |
def | to_smt2 (self) |
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def | use_pp (self) |
Data Fields | |
ctx | |
backtrack_level | |
solver | |
cube_vs | |
Solver API provides methods for implementing the main SMT 2.0 commands: push, pop, check, get-model, etc.
def __init__ | ( | self, | |
solver = None , |
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ctx = None , |
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logFile = None |
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) |
Definition at line 6894 of file z3py.py.
def __del__ | ( | self | ) |
Definition at line 6907 of file z3py.py.
def __copy__ | ( | self | ) |
def __deepcopy__ | ( | self, | |
memo = {} |
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) |
def __iadd__ | ( | self, | |
fml | |||
) |
def __repr__ | ( | self | ) |
def add | ( | self, | |
* | args | ||
) |
Assert constraints into the solver. >>> x = Int('x') >>> s = Solver() >>> s.add(x > 0, x < 2) >>> s [x > 0, x < 2]
Definition at line 7019 of file z3py.py.
Referenced by Solver.__iadd__(), Fixedpoint.__iadd__(), and Optimize.__iadd__().
def append | ( | self, | |
* | args | ||
) |
Assert constraints into the solver. >>> x = Int('x') >>> s = Solver() >>> s.append(x > 0, x < 2) >>> s [x > 0, x < 2]
Definition at line 7034 of file z3py.py.
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 >>> c = s.unsat_core() >>> len(c) 2 >>> Bool('p1') in c True >>> Bool('p2') in c False >>> p3 in c True
Definition at line 7056 of file z3py.py.
def assert_exprs | ( | self, | |
* | args | ||
) |
Assert constraints into the solver. >>> x = Int('x') >>> s = Solver() >>> s.assert_exprs(x > 0, x < 2) >>> s [x > 0, x < 2]
Definition at line 7000 of file z3py.py.
Referenced by Goal.add(), Solver.add(), Fixedpoint.add(), Optimize.add(), Goal.append(), Solver.append(), Fixedpoint.append(), Goal.insert(), Solver.insert(), and Fixedpoint.insert().
def assertions | ( | self | ) |
Return an AST vector containing all added constraints. >>> s = Solver() >>> s.assertions() [] >>> a = Int('a') >>> s.add(a > 0) >>> s.add(a < 10) >>> s.assertions() [a > 0, a < 10]
Definition at line 7239 of file z3py.py.
Referenced by Solver.to_smt2().
def check | ( | self, | |
* | assumptions | ||
) |
Check whether the assertions in the given solver plus the optional assumptions are consistent or not. >>> x = Int('x') >>> s = Solver() >>> s.check() sat >>> s.add(x > 0, x < 2) >>> s.check() sat >>> s.model().eval(x) 1 >>> s.add(x < 1) >>> s.check() unsat >>> s.reset() >>> s.add(2**x == 4) >>> s.check() unknown
Definition at line 7086 of file z3py.py.
Referenced by Solver.model().
def consequences | ( | self, | |
assumptions, | |||
variables | |||
) |
Determine fixed values for the variables based on the solver state and assumptions. >>> s = Solver() >>> a, b, c, d = Bools('a b c d') >>> s.add(Implies(a,b), Implies(b, c)) >>> s.consequences([a],[b,c,d]) (sat, [Implies(a, b), Implies(a, c)]) >>> s.consequences([Not(c),d],[a,b,c,d]) (sat, [Implies(d, d), Implies(Not(c), Not(c)), Implies(Not(c), Not(b)), Implies(Not(c), Not(a))])
Definition at line 7170 of file z3py.py.
def cube | ( | self, | |
vars = None |
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) |
Get set of cubes The method takes an optional set of variables that restrict which variables may be used as a starting point for cubing. If vars is not None, then the first case split is based on a variable in this set.
Definition at line 7207 of file z3py.py.
def cube_vars | ( | self | ) |
Access the set of variables that were touched by the most recently generated cube. This set of variables can be used as a starting point for additional cubes. The idea is that variables that appear in clauses that are reduced by the most recent cube are likely more useful to cube on.
Definition at line 7228 of file z3py.py.
def dimacs | ( | self, | |
include_names = True |
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) |
Return a textual representation of the solver in DIMACS format.
Definition at line 7350 of file z3py.py.
def from_file | ( | self, | |
filename | |||
) |
Parse assertions from a file
Definition at line 7199 of file z3py.py.
def from_string | ( | self, | |
s | |||
) |
Parse assertions from a string
Definition at line 7203 of file z3py.py.
def help | ( | self | ) |
Display a string describing all available options.
Definition at line 7307 of file z3py.py.
Referenced by Solver.set().
def import_model_converter | ( | self, | |
other | |||
) |
Import model converter from other into the current solver
Definition at line 7134 of file z3py.py.
def insert | ( | self, | |
* | args | ||
) |
Assert constraints into the solver. >>> x = Int('x') >>> s = Solver() >>> s.insert(x > 0, x < 2) >>> s [x > 0, x < 2]
Definition at line 7045 of file z3py.py.
def model | ( | self | ) |
Return a model for the last `check()`. This function raises an exception if a model is not available (e.g., last `check()` returned unsat). >>> s = Solver() >>> a = Int('a') >>> s.add(a + 2 == 0) >>> s.check() sat >>> s.model() [a = -2]
Definition at line 7115 of file z3py.py.
Referenced by ModelRef.__del__(), ModelRef.__getitem__(), ModelRef.__len__(), ModelRef.decls(), ModelRef.eval(), ModelRef.get_interp(), ModelRef.get_sort(), ModelRef.get_universe(), ModelRef.num_sorts(), ModelRef.sexpr(), FuncInterp.translate(), ModelRef.translate(), and ModelRef.update_value().
def non_units | ( | self | ) |
Return an AST vector containing all atomic formulas in solver state that are not units.
Definition at line 7258 of file z3py.py.
def num_scopes | ( | self | ) |
Return the current number of backtracking points. >>> s = Solver() >>> s.num_scopes() 0 >>> s.push() >>> s.num_scopes() 1 >>> s.push() >>> s.num_scopes() 2 >>> s.pop() >>> s.num_scopes() 1
Definition at line 6968 of file z3py.py.
def param_descrs | ( | self | ) |
Return the parameter description set.
Definition at line 7311 of file z3py.py.
def pop | ( | self, | |
num = 1 |
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) |
Backtrack \\c num backtracking points. >>> x = Int('x') >>> s = Solver() >>> s.add(x > 0) >>> s [x > 0] >>> s.push() >>> s.add(x < 1) >>> s [x > 0, x < 1] >>> s.check() unsat >>> s.pop() >>> s.check() sat >>> s [x > 0]
Definition at line 6946 of file z3py.py.
def proof | ( | self | ) |
Return a proof for the last `check()`. Proof construction must be enabled.
Definition at line 7235 of file z3py.py.
def push | ( | self | ) |
Create a backtracking point. >>> x = Int('x') >>> s = Solver() >>> s.add(x > 0) >>> s [x > 0] >>> s.push() >>> s.add(x < 1) >>> s [x > 0, x < 1] >>> s.check() unsat >>> s.pop() >>> s.check() sat >>> s [x > 0]
Definition at line 6924 of file z3py.py.
def reason_unknown | ( | self | ) |
Return a string describing why the last `check()` returned `unknown`. >>> x = Int('x') >>> s = SimpleSolver() >>> s.add(2**x == 4) >>> s.check() unknown >>> s.reason_unknown() '(incomplete (theory arithmetic))'
Definition at line 7294 of file z3py.py.
def reset | ( | self | ) |
Remove all asserted constraints and backtracking points created using `push()`. >>> x = Int('x') >>> s = Solver() >>> s.add(x > 0) >>> s [x > 0] >>> s.reset() >>> s []
Definition at line 6986 of file z3py.py.
def set | ( | self, | |
* | args, | ||
** | keys | ||
) |
Set a configuration option. The method `help()` return a string containing all available options. >>> s = Solver() >>> # The option MBQI can be set using three different approaches. >>> s.set(mbqi=True) >>> s.set('MBQI', True) >>> s.set(':mbqi', True)
Definition at line 6911 of file z3py.py.
def sexpr | ( | self | ) |
Return a formatted string (in Lisp-like format) with all added constraints. We say the string is in s-expression format. >>> x = Int('x') >>> s = Solver() >>> s.add(x > 0) >>> s.add(x < 2) >>> r = s.sexpr()
Definition at line 7338 of file z3py.py.
Referenced by Fixedpoint.__repr__(), and Optimize.__repr__().
def statistics | ( | self | ) |
Return statistics for the last `check()`. >>> s = SimpleSolver() >>> x = Int('x') >>> s.add(x > 0) >>> s.check() sat >>> st = s.statistics() >>> st.get_key_value('final checks') 1 >>> len(st) > 0 True >>> st[0] != 0 True
Definition at line 7276 of file z3py.py.
def to_smt2 | ( | self | ) |
return SMTLIB2 formatted benchmark for solver's assertions
Definition at line 7354 of file z3py.py.
def trail | ( | self | ) |
Return trail of the solver state after a check() call.
Definition at line 7271 of file z3py.py.
Referenced by Solver.trail_levels().
def trail_levels | ( | self | ) |
Return trail and decision levels of the solver state after a check() call.
Definition at line 7263 of file z3py.py.
def translate | ( | self, | |
target | |||
) |
Translate `self` to the context `target`. That is, return a copy of `self` in the context `target`. >>> c1 = Context() >>> c2 = Context() >>> s1 = Solver(ctx=c1) >>> s2 = s1.translate(c2)
Definition at line 7319 of file z3py.py.
Referenced by AstRef.__copy__(), Goal.__copy__(), AstVector.__copy__(), FuncInterp.__copy__(), ModelRef.__copy__(), Solver.__copy__(), Goal.__deepcopy__(), AstVector.__deepcopy__(), FuncInterp.__deepcopy__(), ModelRef.__deepcopy__(), and Solver.__deepcopy__().
def units | ( | self | ) |
Return an AST vector containing all currently inferred units.
Definition at line 7253 of file z3py.py.
def unsat_core | ( | self | ) |
Return a subset (as an AST vector) of the assumptions provided to the last check(). These are the assumptions Z3 used in the unsatisfiability proof. Assumptions are available in Z3. They are used to extract unsatisfiable cores. They may be also used to "retract" assumptions. Note that, assumptions are not really "soft constraints", but they can be used to implement them. >>> p1, p2, p3 = Bools('p1 p2 p3') >>> x, y = Ints('x y') >>> s = Solver() >>> s.add(Implies(p1, x > 0)) >>> s.add(Implies(p2, y > x)) >>> s.add(Implies(p2, y < 1)) >>> s.add(Implies(p3, y > -3)) >>> s.check(p1, p2, p3) unsat >>> core = s.unsat_core() >>> len(core) 2 >>> p1 in core True >>> p2 in core True >>> p3 in core False >>> # "Retracting" p2 >>> s.check(p1, p3) sat
Definition at line 7138 of file z3py.py.
ctx |
Definition at line 6896 of file z3py.py.
Referenced by ArithRef.__add__(), BitVecRef.__add__(), FPRef.__add__(), BitVecRef.__and__(), FuncDeclRef.__call__(), Probe.__call__(), AstMap.__contains__(), AstRef.__copy__(), Goal.__copy__(), AstVector.__copy__(), FuncInterp.__copy__(), ModelRef.__copy__(), Solver.__copy__(), AstRef.__deepcopy__(), Datatype.__deepcopy__(), ParamsRef.__deepcopy__(), ParamDescrsRef.__deepcopy__(), Goal.__deepcopy__(), AstVector.__deepcopy__(), AstMap.__deepcopy__(), FuncEntry.__deepcopy__(), FuncInterp.__deepcopy__(), ModelRef.__deepcopy__(), Statistics.__deepcopy__(), Solver.__deepcopy__(), Fixedpoint.__deepcopy__(), Optimize.__deepcopy__(), ApplyResult.__deepcopy__(), Tactic.__deepcopy__(), Probe.__deepcopy__(), Context.__del__(), AstRef.__del__(), ScopedConstructor.__del__(), ScopedConstructorList.__del__(), ParamsRef.__del__(), ParamDescrsRef.__del__(), Goal.__del__(), AstVector.__del__(), AstMap.__del__(), FuncEntry.__del__(), FuncInterp.__del__(), ModelRef.__del__(), Statistics.__del__(), Solver.__del__(), Fixedpoint.__del__(), Optimize.__del__(), ApplyResult.__del__(), Tactic.__del__(), Probe.__del__(), ParserContext.__del__(), ArithRef.__div__(), BitVecRef.__div__(), FPRef.__div__(), ExprRef.__eq__(), Probe.__eq__(), ArithRef.__ge__(), BitVecRef.__ge__(), Probe.__ge__(), FPRef.__ge__(), SeqRef.__ge__(), AstVector.__getitem__(), SeqRef.__getitem__(), ModelRef.__getitem__(), Statistics.__getitem__(), ApplyResult.__getitem__(), AstMap.__getitem__(), ArithRef.__gt__(), BitVecRef.__gt__(), Probe.__gt__(), FPRef.__gt__(), SeqRef.__gt__(), BitVecRef.__invert__(), ArithRef.__le__(), BitVecRef.__le__(), Probe.__le__(), FPRef.__le__(), SeqRef.__le__(), CharRef.__le__(), AstVector.__len__(), AstMap.__len__(), ModelRef.__len__(), Statistics.__len__(), ApplyResult.__len__(), BitVecRef.__lshift__(), ArithRef.__lt__(), BitVecRef.__lt__(), Probe.__lt__(), FPRef.__lt__(), SeqRef.__lt__(), ArithRef.__mod__(), BitVecRef.__mod__(), ArithRef.__mul__(), BitVecRef.__mul__(), FPRef.__mul__(), ExprRef.__ne__(), Probe.__ne__(), ArithRef.__neg__(), BitVecRef.__neg__(), BitVecRef.__or__(), ArithRef.__pow__(), ArithRef.__radd__(), BitVecRef.__radd__(), FPRef.__radd__(), BitVecRef.__rand__(), ArithRef.__rdiv__(), BitVecRef.__rdiv__(), FPRef.__rdiv__(), ParamsRef.__repr__(), ParamDescrsRef.__repr__(), AstMap.__repr__(), Statistics.__repr__(), BitVecRef.__rlshift__(), ArithRef.__rmod__(), BitVecRef.__rmod__(), ArithRef.__rmul__(), BitVecRef.__rmul__(), FPRef.__rmul__(), BitVecRef.__ror__(), ArithRef.__rpow__(), BitVecRef.__rrshift__(), BitVecRef.__rshift__(), ArithRef.__rsub__(), BitVecRef.__rsub__(), FPRef.__rsub__(), BitVecRef.__rxor__(), AstVector.__setitem__(), AstMap.__setitem__(), ArithRef.__sub__(), BitVecRef.__sub__(), FPRef.__sub__(), BitVecRef.__xor__(), DatatypeSortRef.accessor(), Fixedpoint.add_cover(), ParserContext.add_decl(), Fixedpoint.add_rule(), Optimize.add_soft(), ParserContext.add_sort(), Tactic.apply(), AlgebraicNumRef.approx(), ExprRef.arg(), FuncEntry.arg_value(), FuncInterp.arity(), Goal.as_expr(), ApplyResult.as_expr(), FPNumRef.as_string(), Solver.assert_and_track(), Optimize.assert_and_track(), Goal.assert_exprs(), Solver.assert_exprs(), Fixedpoint.assert_exprs(), Optimize.assert_exprs(), Solver.assertions(), Optimize.assertions(), SeqRef.at(), SeqSortRef.basis(), ReSortRef.basis(), QuantifierRef.body(), BoolSortRef.cast(), Solver.check(), Optimize.check(), UserPropagateBase.conflict(), Solver.consequences(), DatatypeSortRef.constructor(), Goal.convert_model(), AstRef.ctx_ref(), UserPropagateBase.ctx_ref(), ExprRef.decl(), ModelRef.decls(), ArrayRef.default(), RatNumRef.denominator(), Goal.depth(), Goal.dimacs(), Solver.dimacs(), ArraySortRef.domain(), FuncDeclRef.domain(), ArraySortRef.domain_n(), FuncInterp.else_value(), FuncInterp.entry(), AstMap.erase(), ModelRef.eval(), FPNumRef.exponent(), FPNumRef.exponent_as_bv(), FPNumRef.exponent_as_long(), Solver.from_file(), Optimize.from_file(), Solver.from_string(), Optimize.from_string(), ParserContext.from_string(), Goal.get(), Fixedpoint.get_answer(), Fixedpoint.get_assertions(), Fixedpoint.get_cover_delta(), ParamDescrsRef.get_documentation(), Fixedpoint.get_ground_sat_answer(), ModelRef.get_interp(), Statistics.get_key_value(), ParamDescrsRef.get_kind(), ParamDescrsRef.get_name(), Fixedpoint.get_num_levels(), Fixedpoint.get_rule_names_along_trace(), Fixedpoint.get_rules(), Fixedpoint.get_rules_along_trace(), ModelRef.get_sort(), ModelRef.get_universe(), Solver.help(), Fixedpoint.help(), Optimize.help(), Tactic.help(), Solver.import_model_converter(), Goal.inconsistent(), CharRef.is_digit(), FPNumRef.isInf(), FPNumRef.isNaN(), FPNumRef.isNegative(), FPNumRef.isNormal(), FPNumRef.isPositive(), FPNumRef.isSubnormal(), FPNumRef.isZero(), AstMap.keys(), Statistics.keys(), SortRef.kind(), Optimize.maximize(), Optimize.minimize(), Solver.model(), Optimize.model(), SortRef.name(), FuncDeclRef.name(), QuantifierRef.no_pattern(), Solver.non_units(), FuncEntry.num_args(), FuncInterp.num_entries(), Solver.num_scopes(), ModelRef.num_sorts(), RatNumRef.numerator(), Optimize.objectives(), Solver.param_descrs(), Fixedpoint.param_descrs(), Optimize.param_descrs(), Tactic.param_descrs(), FuncDeclRef.params(), Fixedpoint.parse_file(), Fixedpoint.parse_string(), QuantifierRef.pattern(), AlgebraicNumRef.poly(), Optimize.pop(), Solver.pop(), Goal.prec(), Solver.proof(), Solver.push(), Optimize.push(), AstVector.push(), Fixedpoint.query(), Fixedpoint.query_from_lvl(), FuncDeclRef.range(), ArraySortRef.range(), Solver.reason_unknown(), Fixedpoint.reason_unknown(), Optimize.reason_unknown(), DatatypeSortRef.recognizer(), Context.ref(), Fixedpoint.register_relation(), AstMap.reset(), Solver.reset(), AstVector.resize(), Solver.set(), Fixedpoint.set(), Optimize.set(), ParamsRef.set(), Optimize.set_on_model(), Fixedpoint.set_predicate_representation(), Goal.sexpr(), AstVector.sexpr(), ModelRef.sexpr(), Solver.sexpr(), Fixedpoint.sexpr(), Optimize.sexpr(), ApplyResult.sexpr(), FPNumRef.sign(), FPNumRef.sign_as_bv(), FPNumRef.significand(), FPNumRef.significand_as_bv(), FPNumRef.significand_as_long(), ParamDescrsRef.size(), Goal.size(), Tactic.solver(), ExprRef.sort(), BoolRef.sort(), QuantifierRef.sort(), ArithRef.sort(), BitVecRef.sort(), ArrayRef.sort(), DatatypeRef.sort(), FiniteDomainRef.sort(), FPRef.sort(), SeqRef.sort(), Solver.statistics(), Fixedpoint.statistics(), Optimize.statistics(), CharRef.to_bv(), CharRef.to_int(), Solver.to_smt2(), Fixedpoint.to_string(), Solver.trail(), Solver.trail_levels(), AstVector.translate(), FuncInterp.translate(), AstRef.translate(), Goal.translate(), ModelRef.translate(), Solver.translate(), Solver.units(), Solver.unsat_core(), Optimize.unsat_core(), Fixedpoint.update_rule(), ParamsRef.validate(), FuncEntry.value(), QuantifierRef.var_name(), and QuantifierRef.var_sort().
cube_vs |
Definition at line 7214 of file z3py.py.
Referenced by Solver.cube_vars().
solver |
Definition at line 6898 of file z3py.py.
Referenced by Solver.__del__(), UserPropagateBase.add(), UserPropagateBase.add_created(), UserPropagateBase.add_decide(), UserPropagateBase.add_diseq(), UserPropagateBase.add_eq(), UserPropagateBase.add_final(), UserPropagateBase.add_fixed(), Solver.assert_and_track(), Solver.assert_exprs(), Solver.assertions(), Solver.check(), Solver.consequences(), UserPropagateBase.ctx(), Solver.dimacs(), Solver.from_file(), Solver.from_string(), Solver.help(), Solver.import_model_converter(), Solver.model(), Solver.non_units(), Solver.num_scopes(), Solver.param_descrs(), Solver.pop(), Solver.proof(), Solver.push(), Solver.reason_unknown(), Solver.reset(), Solver.set(), Solver.sexpr(), Solver.statistics(), Solver.trail(), Solver.trail_levels(), Solver.translate(), Solver.units(), and Solver.unsat_core().