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formula: new trivial simplifications

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Add the following rules:
  - f|[+] = [+] if f rejects [*0]
  - f|[*] = [*] if f accepts [*0]
  - f&&[+] = f if f rejects [*0]
  - b:b[*i..j] = b[*max(i,1)..j]
  - b[*i..j]:b[*k..l] = b[*max(i,1)+max(k,1)-1,1), j+l-1]

* spot/tl/formula.cc: Implement the new rules.
* doc/tl/tl.tex: Document them.
* tests/core/equals.test: Test them.
* NEWS: Add them
This commit is contained in:
Alexandre Duret-Lutz 2022-12-08 13:54:19 +01:00
parent 8ed9e3381f
commit 720c380412
4 changed files with 147 additions and 14 deletions
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9
NEWS
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@ -1,5 +1,14 @@
New in spot 2.11.2.dev (not yet released)
Library:
- The following new trivial simplifications have been implemented for SEREs:
- f|[+] = [+] if f rejects [*0]
- f|[*] = [*] if f accepts [*0]
- f&&[+] = f if f rejects [*0]
- b:b[*i..j] = b[*max(i,1)..j]
- b[*i..j]:b[*k..l] = b[*max(i,1)+max(k,1)-1,1), j+l-1]
Bug fixes:
- Automata-based implication checks, used to simplify formulas were