PropProof is mistaking "invalid input" with "harness crash"

[YoshikiTakashima]

I tried this code:

using the following command line invocation:

 mkdir .cargo; echo "paths =[\"/Users/ytakashl/propproof\"]" > .cargo/config.toml
cargo kani  --tests -p prost-types --default-unwind 3 --harness 'tests::check_duration_roundtrip'


SUMMARY:
 ** 1 of 445 failed (10 unreachable)
Failed Checks: This is a placeholder message; Kani doesn't support message formatted at runtime
 File: "/Users/ytakashl/.rustup/toolchains/nightly-2023-04-30-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/result.rs", line 1651, in std::result::unwrap_failed

VERIFICATION:- FAILED
Verification Time: 1.0923209s

with Kani version: 0.30.0

I expected to see this happen: verification success.

Instead, this happened: verification fails

[YoshikiTakashima]

blocking 1 harness in PROST.

[zhassan-aws]

Can you include the failure in the description?

[YoshikiTakashima]

@zhassan-aws, done, but I will take this.