Examples with Formula kodkod.ast.Formula used on opensource projects

Example 86 with Formula

use of kodkod.ast.Formula in project org.alloytools.alloy by AlloyTools.

the class DiffEg method decls.

/**
 * Returns the formulas implicit in the declarations.
 *
 * @return formulas implicit in:
 *
 *         <pre>
 * sig Subject {}
 * sig Resource {}
 * sig Action {}
 * one sig Request {s : Subject,  r : Resource, a : Action }
 * sig Conflicted {s : Subject, r : Resource}
 *         </pre>
 */
public final Formula decls() {
    // one Request
    final Formula f0 = Request.one();
    // s is a function from Request to Subject
    final Formula f1 = sRequest.function(Request, Subject);
    // r is a function from Request to Resource
    final Formula f2 = rRequest.function(Request, Resource);
    // a is a function from Request to Action
    final Formula f3 = action.function(Request, Action);
    // s is a function from Conflicted to Subject
    final Formula f4 = sConflicted.function(Conflicted, Subject);
    // r is a function from Conflicted to Resource
    final Formula f5 = rConflicted.function(Conflicted, Resource);
    return f0.and(f1).and(f2).and(f3).and(f4).and(f5);
}

Example 87 with Formula

use of kodkod.ast.Formula in project org.alloytools.alloy by AlloyTools.

the class FileSystem method decls.

/**
 * Returns the declaration constraints.
 *
 * @return declaration constraints
 */
public final Formula decls() {
    // File and Dir partition object
    final Formula f0 = Obj.eq(File.union(Dir)).and(File.intersection(Dir).no());
    // Root and Cur are in Dir and do not intersect
    final Formula f1 = Root.in(Dir).and(Cur.in(Dir)).and(Root.intersection(Cur).no());
    // don't need to specify that Dir, Name, and DirEntry are disjoint;
    // implied by bounds
    final Formula f2 = entries.in(Dir.product(DirEntry));
    final Formula f3 = parent.partialFunction(Dir, Dir);
    final Formula f4 = name.function(DirEntry, Name);
    final Formula f5 = contents.function(DirEntry, Obj);
    return f0.and(f1).and(f2).and(f3).and(f4).and(f5);
}

Example 88 with Formula

use of kodkod.ast.Formula in project org.alloytools.alloy by AlloyTools.

the class FileSystem method main.

/**
 * Usage: java examples.alloy.FileSystem [scope]
 */
public static void main(String[] args) {
    if (args.length < 1)
        usage();
    try {
        final int n = Integer.parseInt(args[0]);
        final FileSystem model = new FileSystem();
        final Formula f = model.checkNoDirAliases();
        System.out.println(f);
        final Bounds b = model.bounds(n);
        final Solver solver = new Solver();
        solver.options().setSolver(SATFactory.MiniSat);
        final Solution s = solver.solve(f, b);
        System.out.println(s);
    } catch (NumberFormatException nfe) {
        usage();
    } catch (HigherOrderDeclException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (UnboundLeafException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

Example 89 with Formula

use of kodkod.ast.Formula in project org.alloytools.alloy by AlloyTools.

the class Hotel method freshIssue.

/**
 * Returns FreshIssue fact.
 *
 * @return FressIssue fact.
 */
public Formula freshIssue() {
    // -- don't issue same key twice
    // all disj e1, e2: Checkin | e1.card.k2 != e2.card.k2
    // -- don't issue key initially installed in lock
    // all e: Checkin | e.card.k2 !in Room.key.first
    final List<Formula> invs = new ArrayList<Formula>();
    final Variable e1 = Variable.unary("e1");
    final Variable e2 = Variable.unary("e2");
    final Variable e = Variable.unary("e");
    invs.add(e1.eq(e2).not().implies(e1.join(card).join(k2).eq(e2.join(card).join(k2)).not()).forAll(e1.oneOf(Checkin).and(e2.oneOf(Checkin))));
    invs.add(e.join(card).join(k2).in(Room.join(key).join(first)).not().forAll(e.oneOf(Checkin)));
    return Formula.and(invs);
}

Example 90 with Formula

use of kodkod.ast.Formula in project org.alloytools.alloy by AlloyTools.

the class Hotel method noIntervening.

/**
 * Returns the noIntervening fact.
 *
 * @return noIntervening fact.
 */
public Formula noIntervening() {
    // fact NoIntervening {
    // all c: Checkin - pre.last |
    // some e: Enter | e.pre = c.post and e.room = c.room and e.guest =
    // c.guest
    // }
    final Variable c = Variable.unary("c");
    final Variable e = Variable.unary("e");
    final Formula f = e.join(pre).eq(c.join(post)).and(e.join(room).eq(c.join(room))).and(e.join(guest).eq(c.join(guest)));
    return f.forSome(e.oneOf(Enter)).forAll(c.oneOf(Checkin.difference(pre.join(last))));
}