HACK: set carry budgets to zero

common/timing.cc

@@ -216,7 +216,10 @@ void update_budget(Context *ctx)
             auto it = updates.find(pi);
             if (it == updates.end()) continue;
             user.budget = delays.at(pi) + it->second;
-
+            // HACK HACK HACK
+            if (net.second->driver.port == ctx->id("COUT"))
+                user.budget = 0;
+            // HACK HACK HACK
             // Post-update check
 //            if (user.budget < 0)
 //                log_warning("port %s.%s, connected to net '%s', has negative "