tcheckerpy 2026.2.22

A Python Interface for TChecker

tcheckerpy

tcheckerpy is a Python interface to the TChecker model checker, allowing you to analyze and compare timed automata models directly from Python.
It provides access to the following TChecker tools:

• tck-compare
• tck-liveness
• tck-reach
• tck-simulate
• tck-syntax

For detailed documentation, refer to the TChecker Wiki.

Installation

You can install tcheckerpy via PyPI:

pip install tcheckerpy

Usage Example

# import required tools
from tcheckerpy.tools import tck_reach, tck_syntax

# read declaration of timed automata network from .txt or .tck file into string
with open(system_declaration_path) as file:
        system = file.read()

# raise error if syntax is incorrect
tck_syntax.check(system)

# perform reachability analysis
result, stats, certificate = tck_reach.reach(system, tck_reach.Algorithm.REACH, certificate = tck_reach.Certificate.GRAPH)
print(result)
print(stats)
print(certificate)

Example output (based on ad94.txt):

False
MEMORY_MAX_RSS 41116
REACHABLE false
RUNNING_TIME_SECONDS 6.1474e-05
VISITED_STATES 7
VISITED_TRANSITIONS 8

digraph ad94_fig10 {
  0 [initial="true", intval="", labels="", vloc="<l0>", zone="(0<=x && 0<=y)"]
  1 [intval="", labels="", vloc="<l1>", zone="(1<x && 0<=y && 1<x-y)"]
  2 [intval="", labels="", vloc="<l1>", zone="(0<=x && 0<=y && 0<=x-y)"]
  3 [intval="", labels="", vloc="<l2>", zone="(1<x && 1<=y)"]
  4 [intval="", labels="", vloc="<l2>", zone="(1<=x && 1<=y)"]
  5 [intval="", labels="green", vloc="<l3>", zone="(1<x && 0<y && x-y<1)"]
  6 [intval="", labels="green", vloc="<l3>", zone="(0<=x && 0<=y && x-y<1)"]
  0 -> 2 [vedge="<P@a>"]
  1 -> 3 [vedge="<P@b>"]
  2 -> 4 [vedge="<P@b>"]
  2 -> 6 [vedge="<P@c>"]
  5 -> 1 [vedge="<P@a>"]
  5 -> 5 [vedge="<P@d>"]
  6 -> 2 [vedge="<P@a>"]
  6 -> 5 [vedge="<P@d>"]
}