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Add safety comment and improve test documentation

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- Add comment about safety of &levels[0] after n > 0 check
- Improve test documentation about SimpleSolver limitations
- Clarify that Units/NonUnits are more reliable for general use

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot] 2026-02-17 16:43:12 +00:00 • committed by Nikolaj Bjorner
parent 7da235a954
commit a04f255379
2 changed files with 10 additions and 5 deletions
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14
examples/go/test_new_apis.go
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@ -44,11 +44,15 @@ func main() {
fmt.Printf(" NonUnit %d: %s\n", i, nu.String())
}
// Note: Trail() and TrailLevels() work primarily with SimpleSolver.
// With default solvers (created with NewSolver()), they may return
// errors like "cannot retrieve trail from solvers created using tactics".
// For those use cases, Units() and NonUnits() provide similar diagnostic info.
fmt.Println("Note: Trail() and TrailLevels() work primarily with SimpleSolver")
// Note: Trail() and TrailLevels() work primarily with SimpleSolver,
// which is used internally by Z3 but not directly exposed in the Go API.
// With default solvers (created with NewSolver()), they return errors like
// "cannot retrieve trail from solvers created using tactics".
// Units() and NonUnits() provide similar diagnostic information without
// this limitation and work with all solver types.
fmt.Println("\nNote: Trail() and TrailLevels() work primarily with SimpleSolver")
fmt.Println(" These functions may return errors with default solvers")
fmt.Println(" For general diagnostic purposes, Units() and NonUnits() are more reliable")
}
// Test congruence closure APIs