diff --git a/src/btor2/parse.rs b/src/btor2/parse.rs
index d8a4b0d..3968c15 100644
--- a/src/btor2/parse.rs
+++ b/src/btor2/parse.rs
@@ -778,11 +778,16 @@ fn merge_signal_info(original: &SignalInfo, alias: &SignalInfo) -> SignalInfo {
     // TODO: it might be interesting to retain alias names
 
     // only overwrite the kind if it was a node, since other labels add more info
-    let kind = if original.kind == SignalKind::Node {
-        alias.kind
-    } else {
-        original.kind
+    let kind = match (original.kind, alias.kind) {
+        // nodes can always be renamed
+        (SignalKind::Node, alias) => alias,
+        // outputs always overwrite
+        (_, SignalKind::Output) => SignalKind::Output,
+        // otherwise we want to keep the original kind
+        (original, _) => original,
     };
+    // TODO: it might be interesting to retain alias kinds
+    //       e.g., a single signal could be a state and an output
 
     SignalInfo { name, kind }
 }
diff --git a/src/sim/interpreter.rs b/src/sim/interpreter.rs
index 90c2de7..6dd7576 100644
--- a/src/sim/interpreter.rs
+++ b/src/sim/interpreter.rs
@@ -97,7 +97,7 @@ impl<'a> Simulator for Interpreter<'a> {
 
         // copy init values from init to update program
         for state in self.states.iter() {
-            println!("{}", state.symbol.get_symbol_name(self.ctx).unwrap());
+            // println!("{}", state.symbol.get_symbol_name(self.ctx).unwrap());
             let src = self.init.get_range(&state.symbol).unwrap();
             let dst = self.update.get_range(&state.symbol).unwrap();
             exec::assign(&mut self.data[dst], &init_data[src]);