status.md

There is a problem here: suppose we have

MODULE module_with_spec some_spec

and we instantiate two instances of module_with_spec:

MODULE main inst1: module_with_spec(); inst2: module_with_spec();

Then the final module should ensure that the spec is satisfied in both instances. To ensure this, we need to keep track of all instances of module_with_spec, then in the main module we add their specs into the specification.

---

I currently use a hack for expressing justice properties:

• define them in SMV with FAIRNESS
• then literally replace FAIRNESS with JUSTICE in the output circuit

Better options?

• introduce specially named state variables like justice_var
• translate into AIGER without JUSTICE and then post-process: add justice by referring to the special variable
• in this way we refer to the value of a latch, hence, it is of the Moore type

Why is it better?

• more control of what smvtoaig produces
• we can have more than a single justice property
• we can mix with fairness assumptions

Other options? use ltl2smv: specify them using LTLSPEC and then use my_ltl2smv to produce a decent output

• we can use LTLSPEC directly

NOW:

• change to format:
  • allow using several modules with to-be-synthesized-signals
  • use shorter notation --controllable
  • by default translate all signals from DEFINE to spec modules (and remove common)
  • add SYS_AUTOMATON_SPEC, ENV_AUTOMATON_SPEC
  • allow positive and negative automata for both assumptions and guarantees
    • allow positive safety automata

Introduce sections: LTLSPEC, AUTOMATON_SPEC, RE_SPEC... But we also need to specify assumptions -- so add sections: ENV_LTLSPEC, ENV_AUTOMATON_SPEC, ENV_RE_SPEC... ... and handle all these sections.

All these sections can be placed in any module.