loop-termination-prover

Prove loop termination by synthesizing and verifying ranking functions.

17|2|Updated Feb 16, 2026
One-click install
npx skills add https://github.com/rainoftime/pl-skills --skill loop-termination-prover
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: loop-termination-prover
Source: https://github.com/rainoftime/pl-skills/tree/main/loop-termination-prover
Command: npx skills add https://github.com/rainoftime/pl-skills --skill loop-termination-prover

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses the critical challenge of ensuring program loops terminate, preventing infinite execution and guaranteeing predictable program behavior.

Core Features & Use Cases

  • Automated Termination Proofs: Leverages ranking functions to mathematically prove that loops will eventually terminate.
  • Program Verification: Essential for proving the total correctness of algorithms and software components.
  • Use Case: When developing safety-critical systems, use this Skill to formally verify that all loops within the control logic will always terminate, thus preventing potential system hangs or failures.

Quick Start

Use the loop-termination-prover skill to analyze the provided C code snippet and determine if its main while loop is guaranteed to terminate.

Frequently Asked Questions about loop-termination-prover

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I prove loop termination using ranking functions?

To prove loop termination, you synthesize ranking functions to mathematically verify that loops eventually halt. This process analyzes loop invariants and control flow to guarantee predictable program behavior and prevent infinite execution.

What is a ranking function in program verification?

A ranking function in program verification is a mathematical metric used to prove loop termination. It maps program states to a well-founded domain, decreasing with each loop iteration to guarantee the loop will eventually halt.

Can I use Z3 or Coq to verify loop termination for safety-critical systems?

Yes, you can verify loop termination for safety-critical systems using SMT solvers like Z3 or proof assistants like Coq. This ensures all control logic loops terminate, preventing potential system hangs or failures.

How does static analysis handle loop invariants and potential termination metrics?

Static analysis handles loop termination by examining loop invariants, control flow, and potential termination metrics. It applies formal methods to mathematically synthesize and verify ranking functions for total correctness.

What is the best way to formally verify that C code loops will always terminate?

The best way to formally verify C code loop termination is by synthesizing ranking functions. This automated technique mathematically proves loops halt, ensuring total correctness for algorithms and software components.