A VIM plugin that adds syntax highlighting for the SMT-LIB2 format, i.e. *.smt2 files. Although SMT-LIB2 is the standard language supported by most SMT solvers, some of them introduce custom language extensions. Such extensions may range from syntactical sugar to fine-grained control over the underlying solver-procedure. Besides the base SMT-LIB2 language, this plugin supports the extensions used by the Z3 SMT solver.