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sav08:insertion_into_doubly-linked_list [2009/03/18 09:21] vkuncak |
sav08:insertion_into_doubly-linked_list [2009/03/18 09:35] vkuncak |
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| ====== Insertion into Doubly-Linked List ====== | ====== Insertion into Doubly-Linked List ====== | ||
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| + | Doubly-linked list of size 3. | ||
| + | |||
| + | Code: | ||
| <code> | <code> | ||
| Line 41: | Line 45: | ||
| * source code | * source code | ||
| * syntax tree | * syntax tree | ||
| - | * jast: simplified statements | + | * jast: simplified statements (use option -jast to see it) |
| - | * ast: guarded commands with loops | + | * ast: guarded commands with loops (use option -ast to see it) |
| - | * sast: | + | * sast (use option -sast to see it): |
| * eliminating loops with loop invariants by translation to guarded commands (as in [[Backward VCG with Loops]]) | * eliminating loops with loop invariants by translation to guarded commands (as in [[Backward VCG with Loops]]) | ||
| * incorporate preconditions and postconditions using assume and assert | * incorporate preconditions and postconditions using assume and assert | ||
| * compute weakest precondition with respect to 'true' - this is verification condition (VC) | * compute weakest precondition with respect to 'true' - this is verification condition (VC) | ||
| * simplify VC, split into multiple formulas, eliminate easily provable formulas | * simplify VC, split into multiple formulas, eliminate easily provable formulas | ||
| + | * use -v to view the remaining formulas | ||
| * use theorem provers to prove the resulting formulas | * use theorem provers to prove the resulting formulas | ||
| + | * some of the provers: cvcl (make symbolic link to cvc3), z3, SPASS, E, Vampire, BAPA, Isabelle (see also --help) | ||
| In general, system also deals with: | In general, system also deals with: | ||