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76 lines
2.1 KiB
Markdown
76 lines
2.1 KiB
Markdown
# MSAT
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MSAT is an OCaml library that features a modular SAT-solver and some
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extensions (including SMT). This is **work in progress**.
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It derives from [Alt-Ergo Zero](http://cubicle.lri.fr/alt-ergo-zero).
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## COPYRIGHT
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This program is distributed under the Apache Software License version
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2.0. See the enclosed file `LICENSE`.
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## USAGE
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### Generic SAT/SMT Solver
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A modular implementation of the SMT algorithm can be found in the `Msat.Solver` module,
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as a functor which takes two modules :
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- A representation of formulas (which implements the `Formula_intf.S` signature)
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- A theory (which implements the `Theory_intf.S` signature) to check consistence of assertions.
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- A dummy empty module to ensure generativity of the solver (solver modules heavily relies on
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side effects to their internal state)
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### Sat Solver
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A ready-to-use SAT solver is available in the Sat module. It can be used
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as shown in the following code :
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```ocaml
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(* Module initialization *)
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module F = Msat.Sat.Tseitin
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module Sat = Msat.Sat.Make()
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(* We create here two distinct atoms *)
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let a = Msat.Sat.Fsat.fresh () (* A 'new_atom' is always distinct from any other atom *)
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let b = Msat.Sat.Fsat.make 1 (* Atoms can be created from integers *)
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(* Let's create some formulas *)
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let p = F.make_atom a
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let q = F.make_atom b
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let r = F.make_and [p; q]
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let s = F.make_or [F.make_not p; F.make_not q]
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(* We can try and check the satisfiability of the given formulas *)
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Sat.assume (F.make_cnf r)
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let _ = Sat.solve () (* Should return Sat.Sat *)
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(* The Sat solver has an incremental mutable state, so we still have
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* the formula 'r' in our assumptions *)
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Sat.assume (F.make_cnf s)
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let _ = Sat.solve () (* Should return Sat.Unsat *)
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```
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## INSTALLATION
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### Via opam
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Once the package is on [opam](http://opam.ocaml.org), just `opam install msat`.
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For the development version, use:
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opam pin add msat https://github.com/Gbury/mSAT.git
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### Manual installation
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You will need ocamlfind. The command is:
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make install
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