Formal Verification · All levels

Methodology & Debug

Execution-focused methodology for formal verification: requirement-to-property testplanning, state-space and runtime control, disciplined counterexample debug, and continuous integration of formal results into regression and signoff dashboards.

Section goal

How to study this section

Start with each topic hub and restate the requirement intent in your own words.
Use reports and debug pages to classify first divergence accurately.
Practice worked examples and interview drills with fixed run metadata.
Close with checklist and residual-risk framing before signoff claims.

Topics

formal-testplan/ - Formal Testplan and Bring-Up Flow
complexity-management/ - Managing Complexity and Runtime Convergence
debugging-counterexamples/ - Reading and Debugging Counterexample Traces
formal-in-regression/ - Integrating Formal Into CI Regression and Signoff

Formal deep dive

Formal methodology scales when ownership, triage policy, and CI automation are explicit and stable.

Concept diagram

diagram

METHODOLOGY LOOP

plan -> run in CI -> triage -> fix -> revalidate -> signoff dashboard

Metric graph

diagram

FLOW MATURITY SIGNALS

triage latency           ████
reopened proofs          ███
deterministic closure    ███████

Metrics and artifacts to collect

requirement matrix freshness
counterexample turnaround SLA
inconclusive aging by risk tier
reopened proof trend after RTL churn

Mini case study

Integrating formal into daily CI cut reopened-property surprises near release by enforcing vacuity and waiver policies.

Debug branches

Start debug at first semantic divergence cycle.
Tag every failure with owner and risk tier immediately.
Automate stale inconclusive and vacuity alerts.

Senior review question

Ask: which requirement intent is proven, under which assumptions, and what residual risk remains?

Practice this lesson

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