Zetav is a tool for verification of systems specified in RT-Logic language.
Verif is a tool for verification and computation trace analysis of systems described using the Modechart formalism. It can also generate a set of restricted RT-Logic formulae from a Modechart specification which can be used in Zetav.
With default configuration file write the system specification (SP) to the sp-formulas.in file and the checked property (security assertion, SA) to the sa-formulas.in file. Launch zetav-verifier.exe to begin the verification.
With the default configuration example files and outputs are load/stored to archive root directory. But using file-browser you are free to select any needed location. To begin launch run.bat (windows) or run.sh (linux / unix). Select Modechart designer and create Modechart model or load it from file.
1. Introduction Tamil kama kāṭaikaḷ (காமக் கதைகள்) literally means “Tamil erotic stories.” They belong to a broader tradition of kāma literature in India, which celebrates love, desire, and sensuality in poetic and narrative forms. While the term can refer to a wide spectrum—from classical courtly love poetry to modern short‑fiction—today’s discussion will focus on the historical roots, literary conventions, major authors, thematic preoccupations, and the sociocultural milieu that shaped and continues to shape these works. 2. Historical Foundations | Period | Key Works & Authors | Characteristics | |--------|--------------------|-----------------| | Sangam (c. 300 BCE–300 CE) | Kuruntokai , Akananuru (several poems) | Early love poetry ( Akam ) that treats erotic desire as a natural, even divine, aspect of life. The tinai classification (landscape‑based mood) links geography to emotional states. | | Post‑Sangam / Early Medieval | Silappathikaram (c. 2nd century CE), Manimekalai | Epic narratives with extended love‑scenes, exploring both physical intimacy and moral dilemmas. | | Bhakti & Shaiva‑Vaisnavite (9th–13th c.) | Works of Kamban , Thirumangai Alvar | Erotic metaphors used to describe divine love (e.g., madhurya bhava ), blurring the line between human and spiritual yearning. | | Muttukumar’s Siddhartham (17th c.) | First known kama treatise in Tamil, modeled after Kāma‑Sūtra | Systematic discussion of sexual techniques, courtship, and aesthetics, written in a scholarly style. | | Colonial & Early Modern (19th–mid‑20th c.) | Thiruvalluvar’s Tirukkural (Book III – Kāma ), Purananooru | Moralistic treatment of love; some stories appear in periodicals for urban readers. | | Post‑Independence (1950s‑present) | Writers such as Su. Muthusamy , S. Ramaswamy , K. Balasubramaniam , S. Madhavan ; anthologies like Kaviyin Kadal (1997) | A surge of short‑story collections in magazines (e.g., Ananda Vikatan , Kalki ) that blend eroticism with social commentary, humor, and psychological depth. |
The Zetav verifier expects the input RRTL formulae to be in the following form:
<rrtlformula> : <formula> [ CONNECTIVE <formula> ] ... <formula> : <predicate> | NOT <formula> | <quantifiedvars> <formula> | ( <formula> ) <predicate> : <function> PRED_SYMB <function> <function> : <function> FUNC_SYMB <function> | @( ACTION_TYPE ACTION , term ) | CONSTANT <quantifiedvars> : QUANTIFIER VARIABLE [ QUANTIFIER VARIABLE ] ...Where predicate symbols (PRED_SYMB) could be inequality operators <, =<, =, >=, >, function symbols (FUNC_SYMB) could be basic + and - operators, action type (ACTION_TYPE) could be starting action (^), stop action ($), transition action (%) and external action (#). Quantifier symbols (QUANTIFIER) could be either an universal quantifier (forall, V) or an existential quantifier (exists, E). Connectives (CONNECTIVE) could be conjunction (and, &, /\), disjunction (or, |, \/), or implication (imply, ->). All variables (VARIABLE) must start with a lower case letter and all actions (ACTION) with an upper case letter. Constants (CONSTANT) could be positive or negative number. RRTL formulae in the input file must be separated using semicolon (;).
V t V u (
( @(% TrainApproach, t) + 45 =< @(% Crossing, u) /\
@(% Crossing, u) < @(% TrainApproach, t) + 60
)
->
( @($ Downgate, t) =< @(% Crossing, u) /\
@(% Crossing, u) =< @($ Downgate, t) + 45
)
)
Verif tool does not deal with direct input. Examples are load from files with extension MCH. Those files are in XML and describes model modes structure and transition between modes. There is no need to directly modify those files. But in some cases it is possible to make some small changes manualy or generate Modechart models in another tool.
If you have further questions, do not hesitate to contact authors ( Jan Fiedor and Marek Gach ).
This work is supported by the Czech Science Foundation (projects GD102/09/H042 and P103/10/0306), the Czech Ministry of Education (projects COST OC10009 and MSM 0021630528), the European Commission (project IC0901), and the Brno University of Technology (project FIT-S-10-1).