Mutual Exclusion Algorithm using test&set

- mutex.mod             CafeOBJ specification.
- invariants.mod       Invariants to prove.
- template.mod         Proof scores templates
- proof100.mod         Proof scores of Claim 100 (The main claim: mutual exclusion).
- proof110.mod         Proof scores of Claim 110.
- proof120.mod         Proof scores of Claim 120.
- proof130.mod         Proof scores of Claim 130.
- proof140.mod         Proof scores of Claim 140.