Examples with SmtOneAnswerElement org.batfish.symbolic.answers.SmtOneAnswerElement used on opensource projects

Example 6 with SmtOneAnswerElement

use of org.batfish.symbolic.answers.SmtOneAnswerElement in project batfish by batfish.

the class PropertyChecker method checkLoadBalancing.

/*
   * Computes whether load balancing for each source node in a collection is
   * within some threshold k of the each other.
   */
public AnswerElement checkLoadBalancing(HeaderLocationQuestion q, int k) {
    return checkProperty(q, (enc, srcRouters, destPorts) -> {
        PropertyAdder pa = new PropertyAdder(enc.getMainSlice());
        Map<String, ArithExpr> loads = pa.instrumentLoad(destPorts);
        Map<String, BoolExpr> prop = new HashMap<>();
        // TODO: implement this properly after refactoring
        loads.forEach((name, ae) -> prop.put(name, enc.mkTrue()));
        return prop;
    }, (vp) -> new SmtOneAnswerElement(vp.getResult()));
}

Example 7 with SmtOneAnswerElement

use of org.batfish.symbolic.answers.SmtOneAnswerElement in project batfish by batfish.

the class PropertyChecker method checkEqualLength.

/*
   * Computes whether a collection of source routers will always have
   * equal path length to destination port(s).
   */
public AnswerElement checkEqualLength(HeaderLocationQuestion q) {
    return checkProperty(q, (enc, srcRouters, destPorts) -> {
        PropertyAdder pa = new PropertyAdder(enc.getMainSlice());
        Map<String, ArithExpr> lenVars = pa.instrumentPathLength(destPorts);
        Map<String, BoolExpr> eqVars = new HashMap<>();
        List<Expr> lens = new ArrayList<>();
        for (String router : srcRouters) {
            lens.add(lenVars.get(router));
        }
        BoolExpr allEqual = PropertyAdder.allEqual(enc.getCtx(), lens);
        enc.add(enc.mkNot(allEqual));
        for (Entry<String, ArithExpr> entry : lenVars.entrySet()) {
            String name = entry.getKey();
            BoolExpr b = srcRouters.contains(name) ? allEqual : enc.mkTrue();
            eqVars.put(name, b);
        }
        return eqVars;
    }, (vp) -> new SmtOneAnswerElement(vp.getResult()));
}