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https://github.com/Z3Prover/z3
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63730fefaf
With `parallel.enable=true`, Z3 could return a SAT model for a QF_BV
instance that violates its own assertions. The bug traces to solver
translation: named assertions were re-registered with swapped
formula/indicator arguments, corrupting the translated solver's
assertion state.
## Bug
`m_name2assertion` stores `indicator → formula`. In
`smt_solver::translate()`, the structured binding `[k, v]` gives `k =
indicator`, `v = formula`, but `assert_expr(t, a)` expects `(formula,
indicator)`:
```cpp
// Before — args reversed
for (auto& [k, v] : m_name2assertion) {
expr* val = translator(k); // indicator
expr* key = translator(v); // formula
result->assert_expr(val, key); // assert_expr(indicator, formula) ← wrong
}
```
## Fix
```cpp
// After — correct order
for (auto& [k, v] : m_name2assertion) {
expr* fml = translator(v); // formula
expr* ind = translator(k); // indicator
result->assert_expr(fml, ind); // assert_expr(formula, indicator) ✓
}
```
This affects any code path that calls `smt_solver::translate()` and uses
named assertions (`assert_and_track` / `Z3_solver_assert_and_track`),
including all parallel solving modes.
---------
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
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| ackermannization | ||
| api | ||
| ast | ||
| cmd_context | ||
| math | ||
| model | ||
| muz | ||
| nlsat | ||
| opt | ||
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| parsers | ||
| qe | ||
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| smt | ||
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| test | ||
| util | ||
| CMakeLists.txt | ||