Formal verification relies on assertions and symbolic analysis, but the effectiveness of the methodology depends significantly on the structure and abstraction level of the verification environment. Auxiliary code provides an essential modeling layer that simplifies assertion logic and allows for efficient exploration of design behaviors. In overlapping handshake scenarios, auxiliary state tracking captures transient conditions such as multiple control signals asserted simultaneously. These state variables decompose complex logic into isolated, verifiable fragments that improve clarity and convergence. REQ-GNT protocol compliance illustrates how auxiliary logic models dynamic request-grant interactions over multiple cycles. Queuing behavior, outstanding requests, and multi-cycle latency introduce temporal decoupling that is difficult to describe with direct assertions alone. Auxiliary code models intermediate states, encodes handshake dependencies, and separates protocol correctness from signal-level details. This abstraction makes assertions more robust, reusable, and easier to interpret across design revisions. Signal activity monitoring and temporal tracking focus on behavior ...