Dear Priya, it is not a specific software reliability problem that TLA+ would be limited to. You use it to model a _behavior_ which is just a sequence of _states_. Each state consists of _variables_ and these can have different _values_ in each state. To specify the behaviors you define which starting states are acceptable and which transitions (_actions_ in TLA+) can be taken if a behavior is to be accepted. Then you can state properties that you think would be true in each behavior (or in each state). Properties that capture that "nothing bad will happen" are called safety properties, those that capture "something good will eventually happen" are called liveness properties. A property that must be true in each state of any behavior that your specification allows in called an invariant. If you are specifying a sorting algorithm on an array you may want to state as an invariant that the elements in the array viewed as a multiset does not change. Aside from invariants you can also state properties that you think the entire behavior satisfies. You then have a tightly integrated model checker available that allows you to exhaustively check these properties on finite, - model - behaviors. This gives you a good level of confidence that your understanding of the behavior resulting from your specification is correct or it leads you to the issues where your understanding is lacking. For even higher confidence you could then rigorously prove that all behaviors (not only the model) allowed by your specification have the property you want. Hope this helps and best regards, Marko Priya Patel <priyabpatel08@xxxxxxxxx> writes: > I am just started working with TLA+. I want to know when we use TLA+? what > software reliability problems it can detect or solve? > > On Wednesday, June 12, 2019 at 9:12:12 PM UTC-4, AmirHossein wrote: >> >> Please elaborate on your specific question. >> >> AmirHossein >> >> >> On Thu, Jun 13, 2019 at 12:53 AM Priya Patel <priyab...@xxxxxxxxx >> <javascript:>> wrote: >> >>> What are alternatives to achieve similar guarantees? >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "tlaplus" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to tla...@xxxxxxxxxxxxxxxx <javascript:>. >>> To post to this group, send email to tla...@xxxxxxxxxxxxxxxx >>> <javascript:>. >>> Visit this group at https://groups.google.com/group/tlaplus. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/tlaplus/4070df7d-9b57-4d73-8588-e1691f77db6c%40googlegroups.com >>> <https://groups.google.com/d/msgid/tlaplus/4070df7d-9b57-4d73-8588-e1691f77db6c%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> > > -- > You received this message because you are subscribed to the Google Groups "tlaplus" group. > To unsubscribe from this group and stop receiving emails from it, send an email to tlaplus+unsubscribe@xxxxxxxxxxxxxxxx. > To post to this group, send email to tlaplus@xxxxxxxxxxxxxxxx. > Visit this group at https://groups.google.com/group/tlaplus. > To view this discussion on the web visit https://groups.google.com/d/msgid/tlaplus/3d01141a-4ae7-458d-aa02-c4f74bfb4159%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- Prof. Dr. Marko Schütz-Schmuck Department of Mathematical Sciences University of Puerto Rico at Mayagüez Mayagüez, PR 00681 -- You received this message because you are subscribed to the Google Groups "tlaplus" group. To unsubscribe from this group and stop receiving emails from it, send an email to tlaplus+unsubscribe@xxxxxxxxxxxxxxxx. To post to this group, send email to tlaplus@xxxxxxxxxxxxxxxx. Visit this group at https://groups.google.com/group/tlaplus. To view this discussion on the web visit https://groups.google.com/d/msgid/tlaplus/875zp91oqt.fsf%40tpad-m.i-did-not-set--mail-host-address--so-tickle-me. For more options, visit https://groups.google.com/d/optout.
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