fix(test): increase timeout of kani tests

Some changes that we did in the VirtIO queue in this PR:
#4726 pushed kani
proofs close to the time limit we set in the CI. This commit just
increases the timeout from 30 to 40 minutes.

(cherry picked from commit b8ca08e)

Signed-off-by: Babis Chalios <[email protected]>

Author: bchalios

tests/integration_tests/test_kani.py

@@ -1,7 +1,7 @@
 # Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 # SPDX-License-Identifier: Apache-2.0
 """
-Proofs ensuring memory safety properites, user-defined assertions,
+Proofs ensuring memory safety properties, user-defined assertions,
 absence of panics and some types of unexpected behavior (e.g., arithmetic overflows).
 """
 import os
@@ -14,7 +14,9 @@
 PLATFORM = platform.machine()
 
 
-@pytest.mark.timeout(1800)
+# The `check_output` timeout will always fire before this one, but we need to
+# set a timeout here to override the default pytest timeout of 180s.
+@pytest.mark.timeout(2420)
 @pytest.mark.skipif(PLATFORM != "x86_64", reason="Kani proofs run only on x86_64.")
 @pytest.mark.skipif(
     os.environ.get("BUILDKITE") != "true",
@@ -31,7 +33,8 @@ def test_kani(results_dir):
     # --output-format terse is required by -j
     # --enable-unstable is needed to enable `-Z` flags
     _, stdout, _ = utils.check_output(
-        "cargo kani --enable-unstable -Z stubbing -Z function-contracts --restrict-vtable -j --output-format terse"
+        "cargo kani --enable-unstable -Z stubbing -Z function-contracts --restrict-vtable -j --output-format terse",
+        timeout=2400,
     )
 
     (results_dir / "kani_log").write_text(stdout, encoding="utf-8")