Twins: sample from faulty replica IDs

Author: joaomlneto

simulator/src/main/java/byzzbench/simulator/scheduler/twins/TwinsScheduler.java

@@ -47,7 +47,7 @@ public String getId() {
     @Override
     public void initializeScenario(Scenario scenario) {
         // Get the IDs of the replicas
-        List<String> replicaIds = scenario.getReplicas().keySet().stream().sorted().toList();
+        List<String> replicaIds = scenario.getFaultyReplicaIds().stream().toList();
 
         if (replicaIds.size() < numReplicas) {
             throw new IllegalArgumentException("Not enough replicas to create " + numReplicas + " twins");