Counterexample-Guided Refinement

SkillDev tools

Implement CEGAR for synthesis and verification workflows

Use Counterexample-Guided Refinement in Claude, ChatGPT or Ahel Desktop

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Also: Claude Code · Cursor · Codex

Then ask your AI: use the Counterexample-Guided Refinement skill

Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

Account requirements not reviewed. Check the skill instructions before use; Ahel provides instructions and does not run this skill.

No other account needed.

Add Ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Counterexample-Guided RefinementStart free

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/domains/science/computer-science/skills/counterexample-guided-refinement/SKILL.md and read by Ahel’s review.

Purpose

Provides expert guidance on CEGAR (Counterexample-Guided Abstraction Refinement) for verification and synthesis.

Capabilities

Counterexample analysis
Predicate abstraction refinement
Interpolation-based refinement
Abstraction refinement loop management
Convergence analysis
Spurious counterexample detection

Usage Guidelines

Initial Abstraction: Define initial abstraction
Verification: Check abstract model
Counterexample Analysis: Analyze counterexamples
Refinement: Refine abstraction if spurious
Iteration: Repeat until verified or real counterexample

Tools/Libraries

CPAChecker
SeaHorn
BLAST
SLAM

Signals

GitHub stars: 2k
Forks: 113
Last commit: Sep 2026

Advanced

Item type: skill
Key: counterexample-guided-refinement
Source: github.com/a5c-ai/babysitter

github.com/a5c-ai/babysitter