Package com.microsoft.z3

Class Goal

  • public class Goal
extends Z3Object
    A goal (aka problem). A goal is essentially a set of formulas, that can be solved and/or transformed using tactics and solvers.

    • Method Detail

      • getPrecision

        public Z3_goal_prec getPrecision()
        The precision of the goal. Remarks: Goals can be transformed using over and under approximations. An under approximation is applied when the objective is to find a model for a given goal. An over approximation is applied when the objective is to find a proof for a given goal.

      • isPrecise

        public boolean isPrecise()
        Indicates whether the goal is precise.

      • isUnderApproximation

        public boolean isUnderApproximation()
        Indicates whether the goal is an under-approximation.

      • isOverApproximation

        public boolean isOverApproximation()
        Indicates whether the goal is an over-approximation.

      • isGarbage

        public boolean isGarbage()
        Indicates whether the goal is garbage (i.e., the product of over- and under-approximations).

      • add

        public void add​(BoolExpr... constraints)
        Adds the constraints to the given goal.
        Throws:
        Z3Exception

      • inconsistent

        public boolean inconsistent()
        Indicates whether the goal contains `false'.

      • getDepth

        public int getDepth()
        The depth of the goal. Remarks: This tracks how many transformations were applied to it.

      • reset

        public void reset()
        Erases all formulas from the given goal.

      • size

        public int size()
        The number of formulas in the goal.

      • getNumExprs

        public int getNumExprs()
        The number of formulas, subformulas and terms in the goal.

      • isDecidedSat

        public boolean isDecidedSat()
        Indicates whether the goal is empty, and it is precise or the product of an under approximation.

      • isDecidedUnsat

        public boolean isDecidedUnsat()
        Indicates whether the goal contains `false', and it is precise or the product of an over approximation.

      • translate

        public Goal translate​(Context ctx)
        Translates (copies) the Goal to the target Context ctx.
        Throws:
        Z3Exception

      • simplify

        public Goal simplify()
        Simplifies the goal. Remarks: Essentially invokes the `simplify' tactic on the goal.

      • simplify

        public Goal simplify​(Params p)
        Simplifies the goal. Remarks: Essentially invokes the `simplify' tactic on the goal.

      • toString

        public String toString()
        Goal to string conversion.
        Overrides:
        toString in class Object
        Returns:
        A string representation of the Goal.

      • AsBoolExpr

        public BoolExpr AsBoolExpr()
        Goal to BoolExpr conversion. Returns a string representation of the Goal.

      • convertModel

        public Model convertModel​(Model m)
        Convert a model for the goal into a model of the original goal from which this goal was derived.
        Returns:
        A model for g
        Throws:
        Z3Exception