Assertion failed about zipperposition

[c-cube]

On master I get a proof properly. Note that the induction features are research from 2014-2017 and are not actively maintained :-)

[mcoulont]

Thanks for your answer.

Ok, so I should proceed manually to install Zipperposition (via git clone) ?

You've more or less let down the induction, but is there a maintained way to make some arithmetic ?

[c-cube]

The integer/rational arithmetic should still work. However, it's not maintained either and has never been super good (see results at CASC in 2014). Mixing arithmetic and superposition is still a research problem and other solvers tend to delegate most of the work to SMT solver (see: Beagle).

To install the master version: yes, a local git clone, and compile with make or use opam pin locally.

[mcoulont]

If you refer to (http://www.tptp.org/CASC/J7/WWWFiles/ResultsSummary.html) you did good for integers.

By "use opam pin locally", do you mean install opam and use "opam install" in the cloned folder ?

[c-cube]

By "use opam pin locally", do you mean install opam and use "opam install" in the cloned folder ?

Something like that. Typically I'd go inside the cloned repository and running `opam pin .#HEAD` to tell opam to pin the latest git version.

[mcoulont]

It ended up working, thanks.

Must I close the ticket ?

By the way, is there a way to import files ? But perhaps this kind of stuff is more suited to SMT ?

With my PC (i7, 16 Go, Ubuntu 20) the associativity of multiplication was proved in 159s and its commutativity wasn't proved at all (the engine keeps computing, with no result). Is it normal ?

[c-cube]

There isn't a way to import files in .zf files (nor in smt files). Only TPTP has such a feature, and it's not necessarily a good idea (read about the $TPTP env variable…).

I'll close the issue.

With my PC (i7, 16 Go, Ubuntu 20) the associativity of multiplication was proved in 159s and its commutativity wasn't proved at all (the engine keeps computing, with no result). Is it normal ?

Possibly? Is the associativity of multiplication done from scratch? All files in examples are not meant to pass successfully, some are just too hard. Induction is a hard problem 🙂