New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Soundness bug in QF_S logic with str.to_int #4153

Closed

wintered opened this issue Apr 28, 2020 · 1 comment

wintered commented Apr 28, 2020

[648] % z3-4.8.7 small.smt2
unsat
[649] % z3 small.smt2
sat
[650] % z3 model_validate=true small.smt2
sat
(error "line 5 column 10: an invalid model was generated")
[651] % 
[651] % cat small.smt2
(declare-fun a () String)
(declare-fun b () String)
(assert (= (str.++ (str.substr "1" 0 (str.len a)) "0") b))
(assert (< (str.to.int b) 0))
(check-sat)
[652] %

The text was updated successfully, but these errors were encountered:

NikolajBjorner added a commit that referenced this issue


          #4153

4d54b41

Contributor

NikolajBjorner commented Apr 29, 2020

exposed

incomplete axiomatization of stoi
more opportunities for rewriting

NikolajBjorner closed this as completed

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment