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Invalid model on QF_S formula with str.substr, str.contains, str.len #4073

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muchang opened this issue Apr 23, 2020 · 0 comments

muchang commented Apr 23, 2020

Hi,
For this case, Z3 gives an invalid model:

[520] % z3-4.8.7 model_validate=true small.smt2
sat
[521] % z3 model_validate=true small.smt2
sat
(error "line 6 column 10: an invalid model was generated")
[522] % 
[522] % cat small.smt2
(declare-const a String)
(declare-const b String)
(assert (distinct b (str.substr a 0 1)))
(assert (str.contains "bcd" a))
(assert (>= (str.len a) 3))
(check-sat)
[523] %

OS: Ubuntu 18.04
Commit: 8fe3caa

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

NikolajBjorner closed this as completed in

8f29766

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