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IDProjectCategoryView StatusDate SubmittedLast Update
0002232Frama-CPlug-in > wppublic2016-06-14 17:222016-06-14 17:22
Assigned Tocorrenson 
PlatformUnuntu 64-bitOSLinuxOS Version16.04
Product Version 
Target VersionFixed in Version 
Summary0002232: Use of very large real constants cause failures in proof generation in WP
DescriptionCode that uses real constants larger than the size of a double cause a failure to prove, even with true assertions. When WP tries to create the proof for files containing those constants, the kernel crashes with the message of Invalid_argument("Unrecognized constant \"inf\"") in the middle of generating the files to send to the prover.
Steps To Reproduce== File bug.c (attached): int main() { //@ assert 1.0 < 0x1.0p2047; } == Run command: frama-c bug.c -wp -wp-print == Output: [kernel] Parsing FRAMAC_SHARE/libc/__fc_builtin_for_normalization.i (no preprocessing) [kernel] Parsing bug.c (with preprocessing) [wp] warning: Missing RTE guards [wp] 1 goal scheduled [wp] [Alt-Ergo] Goal typed_main_assert : Failed Invalid_argument("Unrecognized constant \"inf\"") [wp] Proved goals: 0 / 1 Alt-Ergo: 0 (failed: 1) ------------------------------------------------------------ Function main ------------------------------------------------------------ Goal Assertion (file bug.c, line 2): Prove: .1e0 < [kernel] Current source was: bug.c:1 The full backtrace is: Raised at file "src/kernel_services/plugin_entry_points/", line 159, characters 51-56 Called from file "src/plugins/wp/", line 535, characters 8-22 Called from file "src/libraries/stdlib/", line 334, characters 14-17 Re-raised at file "src/libraries/stdlib/", line 334, characters 47-48 Called from file "src/libraries/stdlib/", line 335, characters 2-12 Called from file "src/libraries/stdlib/", line 335, characters 2-12 Called from file "", line 134, characters 6-20 Called from file "src/kernel_internals/runtime/", line 37, characters 4-20 Called from file "src/kernel_services/cmdline_parameters/", line 787, characters 2-9 Called from file "src/kernel_services/cmdline_parameters/", line 817, characters 18-64 Called from file "src/kernel_services/cmdline_parameters/", line 228, characters 4-8 Unexpected error (Invalid_argument("Unrecognized constant \"inf\"")). Please report as 'crash' at Your Frama-C version is Aluminium-20160501. Note that a version and a backtrace alone often do not contain enough information to understand the bug. Guidelines for reporting bugs are at: == Note that the constant "0x1.0p2047" can be replaced with any value greater than or equal to 0x2.0p1023; even other forms of real constant other than hexadecimal.
Additional InformationThis was tested in the public Aluminum version, on both a Linux and Cygwin build.
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Attached Filesc file icon bug.c [^] (49 bytes) 2016-06-14 17:22 [Show Content]

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- Issue History
Date Modified Username Field Change
2016-06-14 17:22 jrobbins New Issue
2016-06-14 17:22 jrobbins Status new => assigned
2016-06-14 17:22 jrobbins Assigned To => correnson
2016-06-14 17:22 jrobbins File Added: bug.c

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