## lustrec / test / src / kind_fmcad08 / misc / durationThm_3_e7_334.lus @ 65f71d05

History | View | Annotate | Download (495 Bytes)

1 | |
---|---|

2 |
node Sofar( X : bool ) returns ( Sofar : bool ); |

3 |
let |

4 |
Sofar = X -> X or pre Sofar; |

5 |
tel |

6 |
node Age (p: bool) returns (age_of_p: int); |

7 |
let |

8 |
age_of_p = 0 -> if pre(p) then pre(age_of_p) + 1 else 0; |

9 |
tel |

10 |
--@ ensures OK; |

11 |
node top (k0, m0: int; p, q : bool) returns (OK: bool); |

12 |
var k,m: int; |

13 |
env : bool; |

14 |
let |

15 |
k = k0-> pre(k); |

16 |
m = m0-> pre(m); |

17 |
env = Sofar( (k>=1 and m>=1) and (Age(p)>=k => q) and (Age(q)<= m) ); |

18 |
OK = env => (Age(p) <= k+m); |

19 |
--%MAIN; |

20 |
--%PROPERTY OK=true; |

21 |
tel |