Comments (4)
@tautschnig: I think I have seen one of your PRs related to bswap
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Yes, but 1) should that be the root cause then there's a problem with the benchmark as it would rely on GCC built-ins; 2) I believe we would generate non-deterministic values in such a case, and thus over-approximate rather than introduce an error. Also, the solver terminates VERY quickly, so I'd be a bit surprised if it were related to bswap
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from cbmc.
from cbmc.
Here are results of my investigation:
- I failed to manually prove or disprove the classification of the benchmark, because the benchmark is big and messy, and no short property-violating error trace exists (I failed to find any).
- For low unwind constant CBMC terminates with TRUE, for larger constants (e.g. 40) it timeouts (15min).
- I checked other tools for error traces, namely CPA-seq, SMACK, ESBMC, UAutomizer. But none of them successfully analysed the benchmarks (typically timeouts).
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Related Issues (20)
- OBSOLETE
- Improve the witness generation for ProductLines, Floats, and Sequentialized
- 18 red memsafety benchmarks HOT 4
- Fixing: byte_extract flatting with negative offset: byte_extract_little_endian HOT 2
- Fixing: equality without matching types HOT 13
- Fixing: too many addressed objects: maximum number of objects is set to 2^n=256 (with n=8); HOT 2
- Fixing: too many addressed objects HOT 4
- Fixing: pointer handling for concurrency is unsound HOT 2
- Fixing: byte_update of unknown width: byte_update_little_endian HOT 2
- Fixing: implicit conversion not permitted HOT 2
- Fixing: warning: ignoring array_of HOT 3
- Fixing: cannot unpack struct with non-byte aligned components HOT 1
- RED status - strcpy/memcpy HOT 2
- Type-checking failure: "numeric exception"/"identifier XYZ not found" HOT 6
- No violation node for some benchmarks in the memory safety category HOT 3
- Incorrect FALSE detected in function strncpy (43_1a_cilled_true-unreach-call_ok_nondet_linux-43_1a-drivers--power--test_power.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.c) HOT 3
- Incorrect FALSE detected in function strcpy (module_get_put-drivers-char-ipmi-ipmi_watchdog.ko_true-unreach-call.cil.out.i.pp.i) HOT 6
- Incorrect FALSE related to pointer outside dynamic object bounds HOT 9
- Incorrect TRUE for ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--usb--misc--legousbtower.ko_false-unreach-call.cil.c HOT 5
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