• David Hauzar's avatar
    Transformation that for each declared abstract function and predicate · 9b6d889c
    David Hauzar authored
    p labeled with label "model_projected" for that it exists a projection
    function f creates declaration of new constant c and axiom stating that
    c = f p
    Projection functions are functions tagged with meta "model_projection".
    Function f is projection function for abstract function and predicate p
    if f is tagged with meta "model_projection" and has a single argument
    of the same type as is the type of p.
    This transformation is needed in situations when we want to display not
    value of a variable, but value of a projection function applied to a variable.
    Note that since Why3 supports namespaces (different projection functions
    can have the same name) and input languages of solvers typically not,
    Why3 renames projection functions to avoid name clashes.
    This is why it is not possible to just store the name of the projection
    function in a label and than query the solver directly for the value of
    the projection.
    Also, it means that this transformation should thus be executed before
    this renaming.
intro_projections_counterexmp.mli 1016 Bytes