From Specification
to Tapeout-Ready
Assertions.
- Spec + RTL in. Sign-off-ready SVA out — in minutes, not days.
- <1% hallucination rate. Deterministic, traceable output every run.
- Purpose-built for silicon, deep domain expertise — not a generic LLM wrapper. No manual cleanup.
Verification is still
painfully manual
~70% of silicon failures are functional. They are hardest to detect pre-silicon, slowest to debug, and most expensive to fix—yet assertion-based verification remains a largely manual process.
Today's Reality
- Assertions handwritten — 20% of DV cycle wasted
- Bugs escape to silicon — costs millions in re-spins
- Coverage gaps invisible until post-silicon failure
- LLMs one-shot, hallucinate, not connected to RTL
Real-world example: FIFO Off-by-One Bug
Off-by-one error in counter → fifo_full asserted one cycle late → data overwritten silently → corruption propagates. Works in most simulations. Only fails under specific timing patterns.
Avestra's Approach
- Multi-agent AI generates full SVA suite from spec + RTL
- Spec ↔ RTL inconsistency detection before first sim
- SVA coverage-driven testbenches — comprehensive SystemVerilog tests auto-generated
- Fully auditable, deterministic — not just prompting
From specification to
silicon-ready assertions
An 8-agent orchestrated pipeline that transforms your spec and RTL into a production-grade SVA suite — in minutes, not weeks.
Inputs
Specification
Natural language · .docx · FSM diagrams
RTL Design
Verilog / SystemVerilog · netlist
RAG Context
Proprietary SVA domain knowledge base
8-Agent AI Pipeline
Spec Analysis Agent
FSM extraction · temporal rules · transition paths
RTL Analysis Agent
COI · clock domains · signal tracing · state encoding
RAG Context Agent
Domain knowledge retrieval · SVA pattern matching
Inconsistency Detection
Missing states · illegal transitions · timing violations
SVA Generation Agent
Property synthesis · assume gen · path encoding
Coverage Analysis Agent
Cover properties · vacuity checks · reachability
Cross Check Agent
Validates assertions against spec + RTL · gap detection
Testbench Gen Agent
Directed tests · stimulus · response checkers
Outputs
SVA Assertion Suite
assert · assume · cover · clocked · vacuity-guarded
SVA Coverage
RTL cover hits · vacuity · reachability
Inconsistency Report
RTL bugs · spec clarifications · diff annotations
Testbench
SV testbench · directed tests · stimulus · checker
Verified · Closed · Silicon-Ready
100% assertion closure · proof certificates
Works with industry-standard simulators
Avestra generates compile and simulation scripts for all major EDA tools.
Questa
Siemens
VCS
Synopsys
Xcelium
Cadence
Built for production-grade
comprehensive verification
Avestra extracts microarchitectural intent, detects spec–RTL gaps, and emits traceable, sign-off-quality assertions — not just generated code.
Multi-agent architecture
Rule-based reasoning engine + multi-agent orchestration. Deterministic, auditable output — not just prompting.
Built-In Domain Intelligence
Proprietary RAG trained on 3 SVA textbooks, 22 US patents, and 35 years of CPU/ASIC/SoC expertise. <1% hallucination rate — domain knowledge no generic LLM can match.
Spec ↔ RTL Bug Detection
Catches missing states, illegal transitions, timing violations, and undefined behavior between spec and RTL — before simulation.
LLM-Agnostic Pipeline
8 specialized agents orchestrated by a model-independent rule engine. Swap the underlying LLM without affecting output quality or structure.
Complete SVA & Testbench Suite
Full parameterized, multi-clocked SVA suite — assert, assume, cover — plus coverage-driven SV testbenches with directed tests and response checkers.
Purpose-built agents,
each an expert in its domain
Every Avestra agent is a standalone product that can be used independently or as part of the full agentic pipeline — from RTL analysis to verified testbenches.
RTL Analysis Agent
Deep structural analysis of your RTL design. Traces cone-of-influence, resolves clock domains, identifies state encoding, and maps signal relationships to build a complete verification context.
- Cone-of-influence (COI) extraction per signal
- Multi-clock domain identification & CDC analysis
- State machine extraction and transition mapping
- Port, interface, and hierarchy resolution
Specification Analysis Agent
Parses natural language specifications, FSM diagrams, and timing tables to extract RTL intent — temporal rules, safety invariants, liveness conditions, and illegal state sequences.
- Natural language to RTL property extraction
- FSM diagram parsing and transition modeling
- Temporal rule and liveness condition detection
- Illegal state and corner-case enumeration
Assertion Generation Agent
Synthesizes production-grade SystemVerilog Assertions from verified spec and RTL context. Outputs clocked properties, assume constraints, cover points, and vacuity guards — fully traceable to source.
- Clocked assert, assume, and cover property synthesis
- Multi-clocked and parameterized assertion generation
- Vacuity guards and recursive property support
- Every assertion traced back to spec + RTL source
Testbench Generation Agent
Generates comprehensive SystemVerilog testbenches driven by SVA coverage targets. Produces UVM-ready stimulus, directed tests, and response checkers that close coverage holes identified by the assertion suite.
- SVA coverage-driven test stimulus generation
- UVM-ready testbench architecture
- Directed tests targeting uncovered assertion paths
- Response checkers and self-checking test infrastructure
Deep domain expertise,
from the ground up
22 Granted US Patents
In design and verification
Deep Industry Experience
CPU/ASIC/SoC Design & Verification
One subscription.
Everything included.
Avestra is built on Tuple Technologies' Stratos platform — so your team gets enterprise-grade infrastructure out of the box. No extra vendors, no integration projects. Just Avestra, ready to use from day one.
Everything a DV team needs, already built in.
Avestra ships with the operational layer your team relies on — no extra vendors, no integration projects. Think of it as getting your EDA toolchain and your operations platform in a single subscription.
SSO
One login for your whole team, with role-based access
License Monitor
EDA license tracking & job management integration
Alerts
Get notified when something needs your attention
Monitoring
Always-on visibility into system health & uptime
Security
Enterprise-grade security & compliance, built in
Up and running, fast.
Your team has everything they need from day one — no separate vendors, no months of setup.
Want to see what's included?
Every Avestra subscription includes the full Stratos platform — built and maintained by Tuple Technologies.
Ready to eliminate
assertion debt?
Join verification engineers at leading semiconductor companies who are moving from days to minutes with Avestra.