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Abstract: “The Abstract State Machine (ASM) theory is a well-known formal method, which can be used to specify arbitrary algorithms, ap- plications or even whole systems. Over the past years, there have been many approaches to implement concrete ASM-based modeling and spec- ification languages. All of those approaches define their type systems and operator semantics differently in their internal representation, which leads to undesired or unexpected behavior during the modeling, the ex- ecution, and code generation of such ASM specifications. In this paper, we present CASM-IR, an Intermediate Representation (IR), designed to aid ASM-based language engineering which is based on a well-formed ASM-based specification format. Moreover, CASM-IR is conceptualized from the ground up to ease the formalization of ASM-based analysis and transformation passes. The feasibility of CASM-IR solving the uniform ASM representation problem is depicted. Based on our CASM-IR imple- mentation, we were able to integrate a front-end of our statically inferred Corinthian Abstract State Machine (CASM) modeling language.”