Karp-Miller Trees for a Branching Extension of VASS

@article{Verma2005KarpMillerTF,
  title={Karp-Miller Trees for a Branching Extension of VASS},
  author={Kumar Neeraj Verma and Jean Goubault-Larrecq},
  journal={Discrete Mathematics & Theoretical Computer Science},
  year={2005},
  volume={7},
  pages={217-230}
}
We study BVASS (Branching VASS) which extend VASS (Vector Addition Systems with States) by allowing addition transitio ns that merge two configurations. Runs in BVASS are tree-like structures instead of linear ones as for VASS. We show that the construction of Karp-Miller trees for VASS can be extended to BVASS. This entails that the coverability set for B VASS is computable. 
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