Z3 |

Public Member Functions | Data Fields
Tactic Class Reference

## Public Member Functions
def | __init__ (self, tactic, ctx=None)
def | __deepcopy__ (self, memo={})
def | __del__ (self)
def | solver (self, logFile=None)
def | apply (self, goal, *arguments, **keywords)
def | __call__ (self, goal, *arguments, **keywords)
def | help (self)
def | param_descrs (self)

## Data Fields
| ctx
| tactic

## Detailed Description

    Tactics transform, solver and/or simplify sets of constraints (Goal).
    A Tactic can be converted into a Solver using the method solver().

    Several combinators are available for creating new tactics using the built-in ones:
    Then(), OrElse(), FailIf(), Repeat(), When(), Cond().

Definition at line 8057 of file z3py.py.

## Constructor & Destructor Documentation

## ◆ __init__()

def __init__ | ( |  | self,
|  |  | tactic,
|  |  | ctx = `None`
| ) |  |

Definition at line 8065 of file z3py.py.

8065 def __init__(self, tactic, ctx=None):
8066 self.ctx = _get_ctx(ctx)
8067 self.tactic = None
8068 if isinstance(tactic, TacticObj):
8069 self.tactic = tactic
8070 else:
8071 if z3_debug():
8072 _z3_assert(isinstance(tactic, str), "tactic name expected")
8073 try:
8074 self.tactic = Z3_mk_tactic(self.ctx.ref(), str(tactic))
8075 except Z3Exception:
8076 raise Z3Exception("unknown tactic '%s'" % tactic)
8077 Z3_tactic_inc_ref(self.ctx.ref(), self.tactic)
8078
z3py.z3_debug
def z3_debug()
Definition: z3py.py:64
Z3_mk_tactic
Z3_tactic Z3_API Z3_mk_tactic(Z3_context c, Z3_string name)
Return a tactic associated with the given name. The complete list of tactics may be obtained using th...
Z3_tactic_inc_ref
void Z3_API Z3_tactic_inc_ref(Z3_context c, Z3_tactic t)
Increment the reference counter of the given tactic.

## ◆ __del__()

def __del__ | ( |  | self | ) |

Definition at line 8082 of file z3py.py.

8082 def __del__(self):
8083 if self.tactic is not None and self.ctx.ref() is not None:
8084 Z3_tactic_dec_ref(self.ctx.ref(), self.tactic)
8085
Z3_tactic_dec_ref
void Z3_API Z3_tactic_dec_ref(Z3_context c, Z3_tactic g)
Decrement the reference counter of the given tactic.

## Member Function Documentation

## ◆ __call__()

def __call__ | ( |  | self,
|  |  | goal,
|  | * | arguments,
|  | ** | keywords
| ) |  |

    Apply tactic `self` to the given goal or Z3 Boolean expression using the given options.

    >>> x, y = Ints('x y')
    >>> t = Tactic('solve-eqs')
    >>> t(And(x == 0, y >= x + 1))
    [[y >= 1]]

Definition at line 8120 of file z3py.py.

8120 def __call__(self, goal, *arguments, **keywords):
8121 """Apply tactic `self` to the given goal or Z3 Boolean expression using the given options.
8122
8123 >>> x, y = Ints('x y')
8124 >>> t = Tactic('solve-eqs')
8125 >>> t(And(x == 0, y >= x + 1))
8126 [[y >= 1]]
8127 """
8128 return self.apply(goal, *arguments, **keywords)
8129
z3py.Ints
def Ints(names, ctx=None)
Definition: z3py.py:3223
z3py.And
def And(*args)
Definition: z3py.py:1813

## ◆ __deepcopy__()

def __deepcopy__ | ( |  | self,
|  |  | memo = `{}`
| ) |  |

Definition at line 8079 of file z3py.py.

8079 def __deepcopy__(self, memo={}):
8080 return Tactic(self.tactic, self.ctx)
8081

## ◆ apply()

def apply | ( |  | self,
|  |  | goal,
|  | * | arguments,
|  | ** | keywords
| ) |  |

    Apply tactic `self` to the given goal or Z3 Boolean expression using the given options.

    >>> x, y = Ints('x y')
    >>> t = Tactic('solve-eqs')
    >>> t.apply(And(x == 0, y >= x + 1))
    [[y >= 1]]

Definition at line 8103 of file z3py.py.

8103 def apply(self, goal, *arguments, **keywords):
8104 """Apply tactic `self` to the given goal or Z3 Boolean expression using the given options.
8105
8106 >>> x, y = Ints('x y')
8107 >>> t = Tactic('solve-eqs')
8108 >>> t.apply(And(x == 0, y >= x + 1))
8109 [[y >= 1]]
8110 """
8111 if z3_debug():
8112 _z3_assert(isinstance(goal, (Goal, BoolRef)), "Z3 Goal or Boolean expressions expected")
8113 goal = _to_goal(goal)
8114 if len(arguments) > 0 or len(keywords) > 0:
8115 p = args2params(arguments, keywords, self.ctx)
8116 return ApplyResult(Z3_tactic_apply_ex(self.ctx.ref(), self.tactic, goal.goal, p.params), self.ctx)
8117 else:
8118 return ApplyResult(Z3_tactic_apply(self.ctx.ref(), self.tactic, goal.goal), self.ctx)
8119
z3py.args2params
def args2params(arguments, keywords, ctx=None)
Definition: z3py.py:5396
Z3_tactic_apply_ex
Z3_apply_result Z3_API Z3_tactic_apply_ex(Z3_context c, Z3_tactic t, Z3_goal g, Z3_params p)
Apply tactic t to the goal g using the parameter set p.
Z3_tactic_apply
Z3_apply_result Z3_API Z3_tactic_apply(Z3_context c, Z3_tactic t, Z3_goal g)
Apply tactic t to the goal g.

Referenced by Tactic.__call__().

## ◆ help()

def help | ( |  | self | ) |

    Display a string containing a description of the available options for the `self` tactic.

Definition at line 8130 of file z3py.py.

8130 def help(self):
8131 """Display a string containing a description of the available options for the `self` tactic."""
8132 print(Z3_tactic_get_help(self.ctx.ref(), self.tactic))
8133
Z3_tactic_get_help
Z3_string Z3_API Z3_tactic_get_help(Z3_context c, Z3_tactic t)
Return a string containing a description of parameters accepted by the given tactic.

## ◆ param_descrs()

def param_descrs | ( |  | self | ) |

    Return the parameter description set.

Definition at line 8134 of file z3py.py.

8134 def param_descrs(self):
8135 """Return the parameter description set."""
8136 return ParamDescrsRef(Z3_tactic_get_param_descrs(self.ctx.ref(), self.tactic), self.ctx)
8137
8138
Z3_tactic_get_param_descrs
Z3_param_descrs Z3_API Z3_tactic_get_param_descrs(Z3_context c, Z3_tactic t)
Return the parameter description set for the given tactic object.

## ◆ solver()

def solver | ( |  | self,
|  |  | logFile = `None`
| ) |  |

    Create a solver using the tactic `self`.

    The solver supports the methods `push()` and `pop()`, but it
    will always solve each `check()` from scratch.

    >>> t = Then('simplify', 'nlsat')
    >>> s = t.solver()
    >>> x = Real('x')
    >>> s.add(x**2 == 2, x > 0)
    >>> s.check()
    sat
    >>> s.model()
    [x = 1.4142135623?]

Definition at line 8086 of file z3py.py.

8086 def solver(self, logFile=None):
8087 """Create a solver using the tactic `self`.
8088
8089 The solver supports the methods `push()` and `pop()`, but it
8090 will always solve each `check()` from scratch.
8091
8092 >>> t = Then('simplify', 'nlsat')
8093 >>> s = t.solver()
8094 >>> x = Real('x')
8095 >>> s.add(x**2 == 2, x > 0)
8096 >>> s.check()
8097 sat
8098 >>> s.model()
8099 [x = 1.4142135623?]
8100 """
8101 return Solver(Z3_mk_solver_from_tactic(self.ctx.ref(), self.tactic), self.ctx, logFile)
8102
z3py.Then
def Then(*ts, **ks)
Definition: z3py.py:8191
z3py.Real
def Real(name, ctx=None)
Definition: z3py.py:3263
Z3_mk_solver_from_tactic
Z3_solver Z3_API Z3_mk_solver_from_tactic(Z3_context c, Z3_tactic t)
Create a new solver that is implemented using the given tactic. The solver supports the commands Z3_s...

Referenced by Solver.__del__(), UserPropagateBase.add(), 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().

## Field Documentation

## ◆ ctx

ctx

Definition at line 8066 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__(), ArithRef.__div__(), BitVecRef.__div__(), FPRef.__div__(), ExprRef.__eq__(), Probe.__eq__(), ArithRef.__ge__(), BitVecRef.__ge__(), Probe.__ge__(), FPRef.__ge__(), SeqRef.__ge__(), QuantifierRef.__getitem__(), ArrayRef.__getitem__(), 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__(), 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(), Fixedpoint.add_rule(), Optimize.add_soft(), 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(), 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(), 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(), 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(), 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().

## ◆ tactic

tactic

Definition at line 8067 of file z3py.py.

Referenced by Tactic.__deepcopy__(), Tactic.__del__(), Tactic.apply(), Tactic.help(), Tactic.param_descrs(), and Tactic.solver().