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| author | Gereon Kremer <gereon.kremer@cs.rwth-aachen.de> | 2020-08-31 21:59:39 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-08-31 14:59:39 -0500 |
| commit | 52bab1414d41a4beb301f3c8a4165fa972f71a93 (patch) | |
| tree | e6bd08cedfc0e73af9a046e3a91c8dad46b19251 /test/regress | |
| parent | 7b3b19f73ceb2168ced48d07a590c0f3be82a8d4 (diff) | |
Fix --ackermann in the presence on syntactically different but possibly equal selects (#4981)
The implementation of --ackermann mishandled selects in a subtle way:
If select is applied to two syntactically different arrays (that may be semantically equal), the ackermann preprocessing failed to generate the "all arguments equal implies terms equal" lemmas.
The problem is that we used the first argument (that is: the array) as lookup to identify terms that need to be considered for these lemmas. Instead we now use their operator (select) just like for uninterpreted function applications.
Fixes #4957 . Also adds a regression.
Diffstat (limited to 'test/regress')
| -rw-r--r-- | test/regress/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | test/regress/regress0/arrays/bug4957.smt2 | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt index 0caeafb36..4de32a426 100644 --- a/test/regress/CMakeLists.txt +++ b/test/regress/CMakeLists.txt @@ -59,6 +59,7 @@ set(regress_0_tests regress0/arrays/bug272.minimized.smtv1.smt2 regress0/arrays/bug272.smtv1.smt2 regress0/arrays/bug3020.smt2 + regress0/arrays/bug4957.smt2 regress0/arrays/bug637.delta.smt2 regress0/arrays/constarr.cvc regress0/arrays/constarr.smt2 diff --git a/test/regress/regress0/arrays/bug4957.smt2 b/test/regress/regress0/arrays/bug4957.smt2 new file mode 100644 index 000000000..f82ae1932 --- /dev/null +++ b/test/regress/regress0/arrays/bug4957.smt2 @@ -0,0 +1,6 @@ +; COMMAND-LINE: --ackermann --no-check-unsat-cores +; EXPECT: unsat +(set-logic QF_ALIA) +(declare-fun a () (Array Int Int)) +(assert (distinct (select a 0) (select (ite false a a) 0))) +(check-sat) |