MCRL2I(1)

📦 version 202507, in nixos 26.05, nixpkgs unstable

💖 NAME 💖

mcrl2i — Interpreter for the mCRL2 data language. This is the MCRL2I(1) manual page from User Commands, bestie ✨.

✨ SYNOPSIS ✨

mcrl2i [OPTION]... [INFILE]

🦋 DESCRIPTION 🦋

Okay so mcrl2i is literally the text-based hangout where you evaluate mCRL2 data expressions. If INFILE is present and if it contains an LPS or PBES, the data types of this specification may be used. If no input file is given, only the standard numeric datatypes are available. Commands are read from stdin.

The following commands are available to manipulate mCRL2 data expressions. Essentially, there are commands to rewrite and type expressions, as well as generating the solutions for a boolean expression. The expressions can contain assigned or unassigned variables.

⚠️ Note that there are no bounds on the number of steps to evaluate or solve an expression, nor is the number of solutions bounded. Hence, the assign, eval and solve commands can give rise to infinite loops. This is your vibe check fr fr 💀.

💬 Commands 💬

  • h[elp] — prints this help message.
  • q[uit] — quits. Bye 👋
  • t[ype] EXPRESSION — prints the type of EXPRESSION.
  • a[ssign] VAR=EXPRESSION — evaluates the expression and assigns it to the variable.
  • e[val] EXPRESSION — rewrites EXPRESSION and prints the result.
  • v[ar] VARLIST — declares the variables in VARLIST.
  • r[ewriter] STRATEGY — uses STRATEGY for rewriting (jitty, jittyc, jittyp, jittycp).
  • s[solve] VARLIST. EXPRESSION — gives all valuations of the variables in VARLIST that satisfy EXPRESSION.

VARLIST is of the form x,y,...: S; ... v,w,...: T.

🎀 OPTIONS 🎀

OPTION can be any of the following:

  • -eEXPRESSION, --evaluate=EXPRESSION — evaluates the given expression and prints the result.
  • -QNUM, --qlimit=NUM — limits enumeration of universal and existential quantifiers in data expressions to NUM iterations (default NUM=10; NUM=0 for unlimited).
  • -rNAME, --rewriter=NAME — uses rewrite strategy NAME: 'jitty' jitty rewriting (default), 'jittyc' compiled jitty rewriting, 'jittyp' jitty rewriting with prover.
  • --timings[=FILE] — appends timing measurements to FILE. Measurements are written to standard error if no FILE is provided.

🌟 Standard options 🌟

  • -q, --quiet — do not display warning messages.
  • -v, --verbose — display short log messages.
  • -d, --debug — display detailed log messages.
  • --log-level=LEVEL — display log messages up to and including level; either warn, verbose, debug or trace.
  • -h, --help — display help information.
  • --version — display version information.
  • --help-all — display help information, including hidden and experimental options.

👑 AUTHOR 👑

Written by Muck van Weerdenburg; Jan Friso Groote. Periodt.

🙈 REPORTING BUGS 🙈

Report bugs at <http://www.mcrl2.org/issuetracker>.

Copyright © 2025 Technische Universiteit Eindhoven. This is free software. You may redistribute copies of it under the terms of the Boost Software License <http://www.boost.org/LICENSE_1_0.txt>. There is NO WARRANTY, to the extent permitted by law.

🌈 SEE ALSO 🌈

See also the manual at <http://www.mcrl2.org/web/user_manual/tools/release/mcrl2i.html>.

Cute sign-off: this is mcrl2i from the source/version mCRL2 toolset 202507.0...., dated October 2026, manual tag MCRL2I(1). Bye bestie 💅🫶

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