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arXiv · 2602.20055

CoReLIN: Constraint-based Reasoning for Zero-shot Lifelong Interactive Navigation

Apoorva Vashisth·Manav Kulshrestha·Pranav Bakshi·Damon Conover·Guillaume Sartoretti·Aniket Bera
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Abstract

Robot navigation typically assumes an obstacle-free path exists between start and goal. In real environments, however, clutter may block all routes. We introduce Lifelong Interactive Navigation, where a mobile robot with manipulation capabilities must move objects to forge paths and complete sequential object-placement tasks. Because environment modifications persist, decisions impact future navigability and task difficulty. We propose CoReLIN, an LLM-driven constraint-based reasoning framework with active perception. CoReLIN reasons over a structured scene graph to decide which objects to relocate, where to place them, and where to explore next. A standard motion planner executes reliable navigation and manipulation primitives. To evaluate long-horizon behavior, we introduce 2 new metrics - Long-term Efficiency Score (LES), a unified metric capturing success, execution efficiency, environment optimality, captured by Price of Clutter. In ProcTHOR-10k, CoReLIN outperforms best baseline by 16% under standard metrics and LES, and transfers to real-world hardware.

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Apoorva Vashisth, Manav Kulshrestha, Pranav Bakshi, Damon Conover, Guillaume Sartoretti, Aniket Bera. 2026-02-23. CoReLIN: Constraint-based Reasoning for Zero-shot Lifelong Interactive Navigation. https://arxiv.org/abs/2602.20055

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