Package com.microsoft.z3

Class Model

  • public class Model
extends Z3Object
    A Model contains interpretations (assignments) of constants and functions.

    • Method Detail

      • getConstInterp

        public <R extends Sort> Expr<R> getConstInterp​(Expr<R> a)
        Retrieves the interpretation (the assignment) of a in the model.
        Parameters:
        a - A Constant
        Returns:
        An expression if the constant has an interpretation in the model, null otherwise.
        Throws:
        Z3Exception

      • getConstInterp

        public <R extends Sort> Expr<R> getConstInterp​(FuncDecl<R> f)
        Retrieves the interpretation (the assignment) of f in the model.
        Parameters:
        f - A function declaration of zero arity
        Returns:
        An expression if the function has an interpretation in the model, null otherwise.
        Throws:
        Z3Exception

      • getFuncInterp

        public <R extends Sort> FuncInterp<R> getFuncInterp​(FuncDecl<R> f)
        Retrieves the interpretation (the assignment) of a non-constant f in the model.
        Parameters:
        f - A function declaration of non-zero arity
        Returns:
        A FunctionInterpretation if the function has an interpretation in the model, null otherwise.
        Throws:
        Z3Exception

      • getNumConsts

        public int getNumConsts()
        The number of constants that have an interpretation in the model.

      • getConstDecls

        public FuncDecl<?>[] getConstDecls()
        The function declarations of the constants in the model.
        Throws:
        Z3Exception

      • getNumFuncs

        public int getNumFuncs()
        The number of function interpretations in the model.

      • getFuncDecls

        public FuncDecl<?>[] getFuncDecls()
        The function declarations of the function interpretations in the model.
        Throws:
        Z3Exception

      • getDecls

        public FuncDecl<?>[] getDecls()
        All symbols that have an interpretation in the model.
        Throws:
        Z3Exception

      • eval

        public <R extends Sort> Expr<R> eval​(Expr<R> t,
                                     boolean completion)
        Evaluates the expression t in the current model. Remarks: This function may fail if t contains quantifiers, is partial (MODEL_PARTIAL enabled), or if t is not well-sorted. In this case a ModelEvaluationFailedException is thrown.
        Parameters:
        t - the expression to evaluate
        completion - An expression completion When this flag is enabled, a model value will be assigned to any constant or function that does not have an interpretation in the model.
        Returns:
        The evaluation of t in the model.
        Throws:
        Z3Exception

      • evaluate

        public <R extends Sort> Expr<R> evaluate​(Expr<R> t,
                                         boolean completion)
        Alias for Eval.
        Throws:
        Z3Exception

      • getNumSorts

        public int getNumSorts()
        The number of uninterpreted sorts that the model has an interpretation for.

      • getSorts

        public Sort[] getSorts()
        The uninterpreted sorts that the model has an interpretation for. Remarks: Z3 also provides an interpretation for uninterpreted sorts used in a formula. The interpretation for a sort is a finite set of distinct values. We say this finite set is the "universe" of the sort.
        Throws:
        Z3Exception
        See Also:
        getNumSorts(), #getSortUniverse(R s)

      • getSortUniverse

        public <R extends Sort> Expr<R>[] getSortUniverse​(R s)
        The finite set of distinct values that represent the interpretation for sort s.
        Parameters:
        s - An uninterpreted sort
        Returns:
        An array of expressions, where each is an element of the universe of s
        Throws:
        Z3Exception

      • toString

        public String toString()
        Conversion of models to strings.
        Overrides:
        toString in class Object
        Returns:
        A string representation of the model.