./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:53:39,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:53:39,835 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 22:53:39,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:53:39,839 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:53:39,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:53:39,859 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:53:39,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:53:39,859 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:53:39,859 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:53:39,859 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:53:39,860 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:53:39,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:53:39,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:53:39,860 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:53:39,860 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:53:39,860 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:53:39,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:53:39,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:53:39,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:53:39,861 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:53:39,861 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:53:39,861 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:53:39,862 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:53:39,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:53:39,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:53:39,863 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2025-03-08 22:53:40,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:53:40,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:53:40,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:53:40,101 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:53:40,101 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:53:40,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2025-03-08 22:53:41,289 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75e33334f/5cae96da070a4c2cac3e90f594945df1/FLAG315a9f8d2 [2025-03-08 22:53:41,623 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:53:41,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2025-03-08 22:53:41,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75e33334f/5cae96da070a4c2cac3e90f594945df1/FLAG315a9f8d2 [2025-03-08 22:53:41,868 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75e33334f/5cae96da070a4c2cac3e90f594945df1 [2025-03-08 22:53:41,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:53:41,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:53:41,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:53:41,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:53:41,875 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:53:41,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:53:41" (1/1) ... [2025-03-08 22:53:41,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512af0d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:41, skipping insertion in model container [2025-03-08 22:53:41,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:53:41" (1/1) ... [2025-03-08 22:53:41,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:53:42,098 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,143 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,144 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,147 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,149 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,150 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,151 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,152 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,152 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,153 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:42,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:53:42,171 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-03-08 22:53:42,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@dcccc5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:42, skipping insertion in model container [2025-03-08 22:53:42,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:53:42,172 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-08 22:53:42,173 INFO L158 Benchmark]: Toolchain (without parser) took 301.69ms. Allocated memory is still 142.6MB. Free memory was 103.8MB in the beginning and 88.5MB in the end (delta: 15.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:53:42,174 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory was 127.3MB in the beginning and 127.0MB in the end (delta: 307.7kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 22:53:42,174 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.76ms. Allocated memory is still 142.6MB. Free memory was 103.8MB in the beginning and 88.5MB in the end (delta: 15.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 22:53:42,175 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 201.3MB. Free memory was 127.3MB in the beginning and 127.0MB in the end (delta: 307.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.76ms. Allocated memory is still 142.6MB. Free memory was 103.8MB in the beginning and 88.5MB in the end (delta: 15.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 607]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:53:43,898 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:53:43,968 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-08 22:53:43,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:53:43,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:53:43,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:53:43,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:53:43,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:53:43,991 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:53:43,991 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:53:43,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:53:43,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:53:43,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:53:43,992 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:53:43,992 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:53:43,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:53:43,992 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:53:43,992 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:53:43,992 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:53:43,993 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:53:43,994 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:53:43,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-08 22:53:43,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:53:43,995 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:53:43,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:53:43,995 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:53:43,995 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2025-03-08 22:53:44,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:53:44,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:53:44,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:53:44,232 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:53:44,232 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:53:44,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2025-03-08 22:53:45,395 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54bed325/b01c53c62acb42fc8ab392f2c47cfc65/FLAGcb9ca17a3 [2025-03-08 22:53:45,642 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:53:45,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2025-03-08 22:53:45,658 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54bed325/b01c53c62acb42fc8ab392f2c47cfc65/FLAGcb9ca17a3 [2025-03-08 22:53:45,961 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54bed325/b01c53c62acb42fc8ab392f2c47cfc65 [2025-03-08 22:53:45,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:53:45,965 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:53:45,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:53:45,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:53:45,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:53:45,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:53:45" (1/1) ... [2025-03-08 22:53:45,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f55f864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:45, skipping insertion in model container [2025-03-08 22:53:45,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:53:45" (1/1) ... [2025-03-08 22:53:46,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:53:46,212 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,277 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,277 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,281 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,283 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,284 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,284 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,284 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,285 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,285 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:53:46,301 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-08 22:53:46,312 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:53:46,343 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,376 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,377 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,378 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,379 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,379 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,379 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,381 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,382 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,382 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-08 22:53:46,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:53:46,389 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:53:46,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:53:46,468 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:53:46,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46 WrapperNode [2025-03-08 22:53:46,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:53:46,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:53:46,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:53:46,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:53:46,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,512 INFO L138 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 343 [2025-03-08 22:53:46,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:53:46,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:53:46,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:53:46,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:53:46,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,522 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,558 INFO L175 MemorySlicer]: Split 55 memory accesses to 2 slices as follows [10, 45]. 82 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [8, 2]. The 23 writes are split as follows [0, 23]. [2025-03-08 22:53:46,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,586 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:53:46,606 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:53:46,607 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:53:46,607 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:53:46,608 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (1/1) ... [2025-03-08 22:53:46,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:53:46,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:53:46,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 22:53:46,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 22:53:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-03-08 22:53:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-03-08 22:53:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-08 22:53:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#0 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#1 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#0 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#1 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#0 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#1 [2025-03-08 22:53:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#0 [2025-03-08 22:53:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#1 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2025-03-08 22:53:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2025-03-08 22:53:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2025-03-08 22:53:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4#0 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4#1 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2025-03-08 22:53:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-08 22:53:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4#0 [2025-03-08 22:53:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4#1 [2025-03-08 22:53:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 22:53:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-08 22:53:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1#0 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1#1 [2025-03-08 22:53:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:53:46,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:53:46,843 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:53:46,845 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:53:47,107 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L527: havoc #t~malloc12.base, #t~malloc12.offset; [2025-03-08 22:53:47,805 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L814: havoc ldv_i2c_transfer_#t~mem49#1.base, ldv_i2c_transfer_#t~mem49#1.offset;havoc ldv_i2c_transfer_#t~ret50#1; [2025-03-08 22:53:47,808 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L816: call ULTIMATE.dealloc(ldv_m88ts2022_rd_reg_~#reg#1.base, ldv_m88ts2022_rd_reg_~#reg#1.offset);havoc ldv_m88ts2022_rd_reg_~#reg#1.base, ldv_m88ts2022_rd_reg_~#reg#1.offset;call ULTIMATE.dealloc(ldv_m88ts2022_rd_reg_~#buf~0#1.base, ldv_m88ts2022_rd_reg_~#buf~0#1.offset);havoc ldv_m88ts2022_rd_reg_~#buf~0#1.base, ldv_m88ts2022_rd_reg_~#buf~0#1.offset;call ULTIMATE.dealloc(ldv_m88ts2022_rd_reg_~#msg~2#1.base, ldv_m88ts2022_rd_reg_~#msg~2#1.offset);havoc ldv_m88ts2022_rd_reg_~#msg~2#1.base, ldv_m88ts2022_rd_reg_~#msg~2#1.offset; [2025-03-08 22:53:47,808 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L619: havoc ldv_dev_get_drvdata_#t~mem29#1.base, ldv_dev_get_drvdata_#t~mem29#1.offset; [2025-03-08 22:53:47,808 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L774: havoc ldv_i2c_get_clientdata_#t~ret42#1.base, ldv_i2c_get_clientdata_#t~ret42#1.offset; [2025-03-08 22:53:47,808 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L842: call ULTIMATE.dealloc(alloc_fix_12_~#chip_id~0#1.base, alloc_fix_12_~#chip_id~0#1.offset);havoc alloc_fix_12_~#chip_id~0#1.base, alloc_fix_12_~#chip_id~0#1.offset; [2025-03-08 22:53:47,873 INFO L? ?]: Removed 414 outVars from TransFormulas that were not future-live. [2025-03-08 22:53:47,873 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:53:47,887 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:53:47,888 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:53:47,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:53:47 BoogieIcfgContainer [2025-03-08 22:53:47,888 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:53:47,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:53:47,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:53:47,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:53:47,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:53:45" (1/3) ... [2025-03-08 22:53:47,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6f51c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:53:47, skipping insertion in model container [2025-03-08 22:53:47,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:53:46" (2/3) ... [2025-03-08 22:53:47,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6f51c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:53:47, skipping insertion in model container [2025-03-08 22:53:47,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:53:47" (3/3) ... [2025-03-08 22:53:47,895 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2025-03-08 22:53:47,904 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:53:47,905 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test12-2.i that has 7 procedures, 318 locations, 1 initial locations, 6 loop locations, and 124 error locations. [2025-03-08 22:53:47,932 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:53:47,940 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@167c17ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:53:47,941 INFO L334 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2025-03-08 22:53:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 170 states have (on average 1.8588235294117648) internal successors, (316), 293 states have internal predecessors, (316), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-08 22:53:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 22:53:47,947 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:53:47,948 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:53:47,948 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:53:47,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:53:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 318096565, now seen corresponding path program 1 times [2025-03-08 22:53:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:53:47,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483863566] [2025-03-08 22:53:47,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:53:47,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:53:47,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:53:47,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 22:53:48,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 22:53:48,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 22:53:48,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:53:48,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:53:48,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:53:48,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:53:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:53:48,107 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:53:48,108 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:53:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483863566] [2025-03-08 22:53:48,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483863566] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:53:48,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:53:48,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:53:48,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925120317] [2025-03-08 22:53:48,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:53:48,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:53:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:53:48,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:53:48,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:53:48,132 INFO L87 Difference]: Start difference. First operand has 312 states, 170 states have (on average 1.8588235294117648) internal successors, (316), 293 states have internal predecessors, (316), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:53:48,299 INFO L93 Difference]: Finished difference Result 525 states and 613 transitions. [2025-03-08 22:53:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:53:48,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 22:53:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:53:48,310 INFO L225 Difference]: With dead ends: 525 [2025-03-08 22:53:48,311 INFO L226 Difference]: Without dead ends: 523 [2025-03-08 22:53:48,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:53:48,316 INFO L435 NwaCegarLoop]: 487 mSDtfsCounter, 215 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:53:48,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1792 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:53:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2025-03-08 22:53:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 314. [2025-03-08 22:53:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 172 states have (on average 1.8430232558139534) internal successors, (317), 294 states have internal predecessors, (317), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2025-03-08 22:53:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 355 transitions. [2025-03-08 22:53:48,372 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 355 transitions. Word has length 11 [2025-03-08 22:53:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:53:48,372 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 355 transitions. [2025-03-08 22:53:48,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 355 transitions. [2025-03-08 22:53:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 22:53:48,373 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:53:48,373 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:53:48,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 22:53:48,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:48,578 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:53:48,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:53:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1205600246, now seen corresponding path program 1 times [2025-03-08 22:53:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:53:48,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808453271] [2025-03-08 22:53:48,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:53:48,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:48,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:53:48,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:53:48,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 22:53:48,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 22:53:48,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 22:53:48,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:53:48,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:53:48,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 22:53:48,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:53:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:53:48,727 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:53:48,727 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:53:48,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808453271] [2025-03-08 22:53:48,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808453271] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:53:48,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:53:48,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:53:48,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510116325] [2025-03-08 22:53:48,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:53:48,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:53:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:53:48,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:53:48,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:53:48,730 INFO L87 Difference]: Start difference. First operand 314 states and 355 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:53:49,365 INFO L93 Difference]: Finished difference Result 409 states and 456 transitions. [2025-03-08 22:53:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:53:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 22:53:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:53:49,367 INFO L225 Difference]: With dead ends: 409 [2025-03-08 22:53:49,367 INFO L226 Difference]: Without dead ends: 409 [2025-03-08 22:53:49,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:53:49,368 INFO L435 NwaCegarLoop]: 223 mSDtfsCounter, 295 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:53:49,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 505 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 22:53:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2025-03-08 22:53:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 347. [2025-03-08 22:53:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 202 states have (on average 1.8217821782178218) internal successors, (368), 323 states have internal predecessors, (368), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (27), 18 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-08 22:53:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 412 transitions. [2025-03-08 22:53:49,385 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 412 transitions. Word has length 11 [2025-03-08 22:53:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:53:49,385 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 412 transitions. [2025-03-08 22:53:49,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 412 transitions. [2025-03-08 22:53:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 22:53:49,385 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:53:49,385 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:53:49,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 22:53:49,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:49,589 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:53:49,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:53:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1205600247, now seen corresponding path program 1 times [2025-03-08 22:53:49,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:53:49,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315994126] [2025-03-08 22:53:49,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:53:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:53:49,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:53:49,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 22:53:49,661 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 22:53:49,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 22:53:49,665 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:53:49,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:53:49,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 22:53:49,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:53:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:53:49,752 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:53:49,752 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:53:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315994126] [2025-03-08 22:53:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315994126] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:53:49,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:53:49,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:53:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070168330] [2025-03-08 22:53:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:53:49,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:53:49,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:53:49,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:53:49,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:53:49,753 INFO L87 Difference]: Start difference. First operand 347 states and 412 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:53:50,346 INFO L93 Difference]: Finished difference Result 460 states and 537 transitions. [2025-03-08 22:53:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:53:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 22:53:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:53:50,349 INFO L225 Difference]: With dead ends: 460 [2025-03-08 22:53:50,349 INFO L226 Difference]: Without dead ends: 460 [2025-03-08 22:53:50,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:53:50,350 INFO L435 NwaCegarLoop]: 360 mSDtfsCounter, 131 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:53:50,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 837 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 22:53:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2025-03-08 22:53:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 391. [2025-03-08 22:53:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 240 states have (on average 1.825) internal successors, (438), 361 states have internal predecessors, (438), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-08 22:53:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 493 transitions. [2025-03-08 22:53:50,368 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 493 transitions. Word has length 11 [2025-03-08 22:53:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:53:50,368 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 493 transitions. [2025-03-08 22:53:50,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 493 transitions. [2025-03-08 22:53:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:53:50,369 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:53:50,369 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:53:50,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 22:53:50,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:50,569 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:53:50,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:53:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1059331533, now seen corresponding path program 1 times [2025-03-08 22:53:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:53:50,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368337434] [2025-03-08 22:53:50,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:53:50,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:50,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:53:50,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:53:50,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 22:53:50,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:53:50,639 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:53:50,639 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:53:50,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:53:50,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 22:53:50,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:53:50,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-08 22:53:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:53:50,723 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:53:50,723 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:53:50,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368337434] [2025-03-08 22:53:50,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368337434] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:53:50,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:53:50,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:53:50,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418184025] [2025-03-08 22:53:50,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:53:50,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:53:50,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:53:50,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:53:50,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:53:50,724 INFO L87 Difference]: Start difference. First operand 391 states and 493 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:53:51,198 INFO L93 Difference]: Finished difference Result 469 states and 594 transitions. [2025-03-08 22:53:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:53:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:53:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:53:51,201 INFO L225 Difference]: With dead ends: 469 [2025-03-08 22:53:51,201 INFO L226 Difference]: Without dead ends: 469 [2025-03-08 22:53:51,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:53:51,202 INFO L435 NwaCegarLoop]: 327 mSDtfsCounter, 66 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 22:53:51,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1047 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 22:53:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2025-03-08 22:53:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 415. [2025-03-08 22:53:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 261 states have (on average 1.8084291187739463) internal successors, (472), 383 states have internal predecessors, (472), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-08 22:53:51,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 527 transitions. [2025-03-08 22:53:51,215 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 527 transitions. Word has length 13 [2025-03-08 22:53:51,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:53:51,215 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 527 transitions. [2025-03-08 22:53:51,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 527 transitions. [2025-03-08 22:53:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:53:51,216 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:53:51,216 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:53:51,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 22:53:51,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:51,416 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:53:51,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:53:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1059331532, now seen corresponding path program 1 times [2025-03-08 22:53:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:53:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264990281] [2025-03-08 22:53:51,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:53:51,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:51,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:53:51,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:53:51,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 22:53:51,477 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:53:51,482 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:53:51,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:53:51,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:53:51,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 22:53:51,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:53:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:53:51,710 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:53:51,710 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:53:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264990281] [2025-03-08 22:53:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264990281] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:53:51,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:53:51,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:53:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905614309] [2025-03-08 22:53:51,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:53:51,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:53:51,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:53:51,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:53:51,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:53:51,711 INFO L87 Difference]: Start difference. First operand 415 states and 527 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:53:52,530 INFO L93 Difference]: Finished difference Result 427 states and 531 transitions. [2025-03-08 22:53:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:53:52,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:53:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:53:52,532 INFO L225 Difference]: With dead ends: 427 [2025-03-08 22:53:52,532 INFO L226 Difference]: Without dead ends: 427 [2025-03-08 22:53:52,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:53:52,532 INFO L435 NwaCegarLoop]: 354 mSDtfsCounter, 28 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 22:53:52,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1309 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 22:53:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2025-03-08 22:53:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 417. [2025-03-08 22:53:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 263 states have (on average 1.7984790874524714) internal successors, (473), 385 states have internal predecessors, (473), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-08 22:53:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 528 transitions. [2025-03-08 22:53:52,541 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 528 transitions. Word has length 13 [2025-03-08 22:53:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:53:52,542 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 528 transitions. [2025-03-08 22:53:52,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:53:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 528 transitions. [2025-03-08 22:53:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-08 22:53:52,542 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:53:52,543 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:53:52,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 22:53:52,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:52,743 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr102REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:53:52,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:53:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1593225136, now seen corresponding path program 1 times [2025-03-08 22:53:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:53:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668441916] [2025-03-08 22:53:52,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:53:52,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:53:52,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:53:52,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:53:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 22:53:52,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 22:53:52,863 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 22:53:52,864 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:53:52,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:53:52,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 22:53:52,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:53:52,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:53:53,005 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-08 22:53:53,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:53:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:53:53,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:01,284 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:01,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668441916] [2025-03-08 22:54:01,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668441916] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:54:01,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:54:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-08 22:54:01,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062224700] [2025-03-08 22:54:01,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:54:01,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 22:54:01,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:01,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 22:54:01,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2025-03-08 22:54:01,285 INFO L87 Difference]: Start difference. First operand 417 states and 528 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:54:06,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:54:10,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:54:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:10,712 INFO L93 Difference]: Finished difference Result 462 states and 577 transitions. [2025-03-08 22:54:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:54:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2025-03-08 22:54:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:10,715 INFO L225 Difference]: With dead ends: 462 [2025-03-08 22:54:10,715 INFO L226 Difference]: Without dead ends: 462 [2025-03-08 22:54:10,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=32, Invalid=76, Unknown=2, NotChecked=0, Total=110 [2025-03-08 22:54:10,716 INFO L435 NwaCegarLoop]: 232 mSDtfsCounter, 271 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 76 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:10,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 863 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 752 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2025-03-08 22:54:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2025-03-08 22:54:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 423. [2025-03-08 22:54:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 270 states have (on average 1.7814814814814814) internal successors, (481), 390 states have internal predecessors, (481), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (35), 23 states have call predecessors, (35), 21 states have call successors, (35) [2025-03-08 22:54:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 537 transitions. [2025-03-08 22:54:10,729 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 537 transitions. Word has length 17 [2025-03-08 22:54:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:10,730 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 537 transitions. [2025-03-08 22:54:10,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:54:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 537 transitions. [2025-03-08 22:54:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-08 22:54:10,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:10,730 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:10,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:10,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:10,935 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr103REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:10,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1593225137, now seen corresponding path program 1 times [2025-03-08 22:54:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486270274] [2025-03-08 22:54:10,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:10,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:10,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:10,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 22:54:10,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 22:54:11,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 22:54:11,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:11,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:11,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 22:54:11,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:11,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:54:11,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:54:11,129 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-03-08 22:54:11,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:54:11,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:54:11,156 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:54:11,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:54:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-08 22:54:11,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:15,325 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:15,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486270274] [2025-03-08 22:54:15,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486270274] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:54:15,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786627737] [2025-03-08 22:54:15,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:15,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:54:15,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:54:15,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:54:15,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2025-03-08 22:54:15,419 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 22:54:15,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 22:54:15,443 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:15,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:15,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 22:54:15,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:15,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:54:15,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:54:15,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:54:15,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:54:15,544 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:54:15,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:54:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-08 22:54:15,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [786627737] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:54:19,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:54:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2025-03-08 22:54:19,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313727252] [2025-03-08 22:54:19,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:54:19,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 22:54:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:19,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 22:54:19,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=69, Unknown=2, NotChecked=16, Total=110 [2025-03-08 22:54:19,661 INFO L87 Difference]: Start difference. First operand 423 states and 537 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:22,440 INFO L93 Difference]: Finished difference Result 740 states and 921 transitions. [2025-03-08 22:54:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:54:22,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-03-08 22:54:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:22,445 INFO L225 Difference]: With dead ends: 740 [2025-03-08 22:54:22,445 INFO L226 Difference]: Without dead ends: 740 [2025-03-08 22:54:22,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=30, Invalid=104, Unknown=2, NotChecked=20, Total=156 [2025-03-08 22:54:22,446 INFO L435 NwaCegarLoop]: 477 mSDtfsCounter, 351 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:22,446 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 2170 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2033 Invalid, 0 Unknown, 733 Unchecked, 2.7s Time] [2025-03-08 22:54:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2025-03-08 22:54:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 585. [2025-03-08 22:54:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 418 states have (on average 1.7942583732057416) internal successors, (750), 535 states have internal predecessors, (750), 40 states have call successors, (40), 11 states have call predecessors, (40), 14 states have return successors, (64), 43 states have call predecessors, (64), 40 states have call successors, (64) [2025-03-08 22:54:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 854 transitions. [2025-03-08 22:54:22,466 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 854 transitions. Word has length 17 [2025-03-08 22:54:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:22,466 INFO L471 AbstractCegarLoop]: Abstraction has 585 states and 854 transitions. [2025-03-08 22:54:22,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 854 transitions. [2025-03-08 22:54:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-08 22:54:22,467 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:22,467 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:22,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2025-03-08 22:54:22,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 22:54:22,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:22,868 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr102REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:22,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1299822129, now seen corresponding path program 1 times [2025-03-08 22:54:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975031868] [2025-03-08 22:54:22,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:22,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:22,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:22,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:22,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 22:54:22,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 22:54:22,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 22:54:22,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:22,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:22,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 22:54:22,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:22,968 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:22,968 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:22,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975031868] [2025-03-08 22:54:22,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975031868] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:22,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:22,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:54:22,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762128493] [2025-03-08 22:54:22,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:22,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:22,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:22,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:22,970 INFO L87 Difference]: Start difference. First operand 585 states and 854 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:23,016 INFO L93 Difference]: Finished difference Result 508 states and 709 transitions. [2025-03-08 22:54:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:54:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-03-08 22:54:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:23,019 INFO L225 Difference]: With dead ends: 508 [2025-03-08 22:54:23,021 INFO L226 Difference]: Without dead ends: 508 [2025-03-08 22:54:23,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:23,022 INFO L435 NwaCegarLoop]: 347 mSDtfsCounter, 0 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:23,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1364 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:54:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2025-03-08 22:54:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2025-03-08 22:54:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 352 states have (on average 1.7755681818181819) internal successors, (625), 467 states have internal predecessors, (625), 33 states have call successors, (33), 9 states have call predecessors, (33), 12 states have return successors, (51), 36 states have call predecessors, (51), 33 states have call successors, (51) [2025-03-08 22:54:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 709 transitions. [2025-03-08 22:54:23,033 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 709 transitions. Word has length 17 [2025-03-08 22:54:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:23,033 INFO L471 AbstractCegarLoop]: Abstraction has 508 states and 709 transitions. [2025-03-08 22:54:23,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 709 transitions. [2025-03-08 22:54:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 22:54:23,033 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:23,033 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:23,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 22:54:23,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:23,234 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:23,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2145329946, now seen corresponding path program 1 times [2025-03-08 22:54:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:23,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061911156] [2025-03-08 22:54:23,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:23,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:23,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:23,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:23,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 22:54:23,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 22:54:23,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 22:54:23,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:23,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:23,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:23,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:54:23,319 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:23,319 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061911156] [2025-03-08 22:54:23,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061911156] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:23,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:23,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:54:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684289013] [2025-03-08 22:54:23,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:23,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:23,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:23,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:23,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:23,321 INFO L87 Difference]: Start difference. First operand 508 states and 709 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:54:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:23,391 INFO L93 Difference]: Finished difference Result 872 states and 1270 transitions. [2025-03-08 22:54:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:54:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-08 22:54:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:23,397 INFO L225 Difference]: With dead ends: 872 [2025-03-08 22:54:23,397 INFO L226 Difference]: Without dead ends: 872 [2025-03-08 22:54:23,397 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:23,398 INFO L435 NwaCegarLoop]: 567 mSDtfsCounter, 206 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:23,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 2035 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:54:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2025-03-08 22:54:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 510. [2025-03-08 22:54:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 354 states have (on average 1.771186440677966) internal successors, (627), 468 states have internal predecessors, (627), 33 states have call successors, (33), 9 states have call predecessors, (33), 12 states have return successors, (51), 37 states have call predecessors, (51), 33 states have call successors, (51) [2025-03-08 22:54:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 711 transitions. [2025-03-08 22:54:23,418 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 711 transitions. Word has length 18 [2025-03-08 22:54:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:23,419 INFO L471 AbstractCegarLoop]: Abstraction has 510 states and 711 transitions. [2025-03-08 22:54:23,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:54:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 711 transitions. [2025-03-08 22:54:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 22:54:23,420 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:23,420 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:23,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 22:54:23,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:23,621 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:23,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:23,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1262133669, now seen corresponding path program 1 times [2025-03-08 22:54:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:23,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992780352] [2025-03-08 22:54:23,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:23,623 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:23,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 22:54:23,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 22:54:23,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 22:54:23,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:23,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:23,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:23,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:23,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:54:23,785 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:23,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992780352] [2025-03-08 22:54:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992780352] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:54:23,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:54:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2025-03-08 22:54:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664287205] [2025-03-08 22:54:23,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:54:23,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:54:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:23,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:54:23,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:54:23,786 INFO L87 Difference]: Start difference. First operand 510 states and 711 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:54:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:23,981 INFO L93 Difference]: Finished difference Result 509 states and 709 transitions. [2025-03-08 22:54:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:54:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2025-03-08 22:54:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:23,983 INFO L225 Difference]: With dead ends: 509 [2025-03-08 22:54:23,983 INFO L226 Difference]: Without dead ends: 509 [2025-03-08 22:54:23,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:54:23,984 INFO L435 NwaCegarLoop]: 294 mSDtfsCounter, 302 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:23,984 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 922 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:54:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2025-03-08 22:54:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2025-03-08 22:54:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 354 states have (on average 1.765536723163842) internal successors, (625), 467 states have internal predecessors, (625), 33 states have call successors, (33), 9 states have call predecessors, (33), 12 states have return successors, (51), 37 states have call predecessors, (51), 33 states have call successors, (51) [2025-03-08 22:54:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 709 transitions. [2025-03-08 22:54:23,995 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 709 transitions. Word has length 18 [2025-03-08 22:54:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:23,995 INFO L471 AbstractCegarLoop]: Abstraction has 509 states and 709 transitions. [2025-03-08 22:54:23,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:54:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 709 transitions. [2025-03-08 22:54:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 22:54:23,997 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:23,997 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:24,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 22:54:24,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:24,198 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:24,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1852553810, now seen corresponding path program 1 times [2025-03-08 22:54:24,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:24,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269500958] [2025-03-08 22:54:24,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:24,202 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:24,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 22:54:24,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 22:54:24,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 22:54:24,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:24,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:24,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:24,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:24,298 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:24,298 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:24,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269500958] [2025-03-08 22:54:24,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269500958] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:24,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:24,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:54:24,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409468885] [2025-03-08 22:54:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:24,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:54:24,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:24,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:54:24,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:54:24,299 INFO L87 Difference]: Start difference. First operand 509 states and 709 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:24,849 INFO L93 Difference]: Finished difference Result 512 states and 711 transitions. [2025-03-08 22:54:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:54:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2025-03-08 22:54:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:24,851 INFO L225 Difference]: With dead ends: 512 [2025-03-08 22:54:24,851 INFO L226 Difference]: Without dead ends: 499 [2025-03-08 22:54:24,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:54:24,851 INFO L435 NwaCegarLoop]: 311 mSDtfsCounter, 41 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:24,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 685 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 22:54:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2025-03-08 22:54:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2025-03-08 22:54:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 345 states have (on average 1.7826086956521738) internal successors, (615), 458 states have internal predecessors, (615), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:54:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 698 transitions. [2025-03-08 22:54:24,860 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 698 transitions. Word has length 18 [2025-03-08 22:54:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:24,860 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 698 transitions. [2025-03-08 22:54:24,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:54:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 698 transitions. [2025-03-08 22:54:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-08 22:54:24,861 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:24,861 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:24,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 22:54:25,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:25,061 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:25,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2080357499, now seen corresponding path program 1 times [2025-03-08 22:54:25,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:25,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142657102] [2025-03-08 22:54:25,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:25,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:25,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:25,064 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:25,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 22:54:25,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 22:54:25,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 22:54:25,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:25,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:25,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 22:54:25,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:25,199 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-08 22:54:25,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:54:25,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2025-03-08 22:54:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:54:25,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:25,364 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142657102] [2025-03-08 22:54:25,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142657102] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:54:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521837752] [2025-03-08 22:54:25,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:25,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:54:25,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:54:25,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:54:25,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2025-03-08 22:54:25,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 22:54:25,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 22:54:25,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:25,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:25,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 22:54:25,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:25,550 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-08 22:54:25,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:54:25,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2025-03-08 22:54:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:54:25,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:25,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521837752] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:54:25,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:54:25,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2025-03-08 22:54:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445102714] [2025-03-08 22:54:25,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:54:25,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:54:25,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:25,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:54:25,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:54:25,663 INFO L87 Difference]: Start difference. First operand 499 states and 698 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:26,746 INFO L93 Difference]: Finished difference Result 582 states and 785 transitions. [2025-03-08 22:54:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:54:26,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2025-03-08 22:54:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:26,748 INFO L225 Difference]: With dead ends: 582 [2025-03-08 22:54:26,748 INFO L226 Difference]: Without dead ends: 582 [2025-03-08 22:54:26,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:54:26,749 INFO L435 NwaCegarLoop]: 209 mSDtfsCounter, 262 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:26,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 871 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-08 22:54:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2025-03-08 22:54:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 499. [2025-03-08 22:54:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 345 states have (on average 1.7797101449275363) internal successors, (614), 458 states have internal predecessors, (614), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:54:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 697 transitions. [2025-03-08 22:54:26,758 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 697 transitions. Word has length 21 [2025-03-08 22:54:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:26,758 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 697 transitions. [2025-03-08 22:54:26,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 697 transitions. [2025-03-08 22:54:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-08 22:54:26,758 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:26,758 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:26,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 22:54:26,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2025-03-08 22:54:27,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-08 22:54:27,159 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:27,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2080357498, now seen corresponding path program 1 times [2025-03-08 22:54:27,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:27,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896569526] [2025-03-08 22:54:27,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:27,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:27,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:27,162 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 22:54:27,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 22:54:27,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 22:54:27,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:27,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:27,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 22:54:27,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:54:27,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:54:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:27,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:31,675 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:31,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896569526] [2025-03-08 22:54:31,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896569526] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:54:31,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188431282] [2025-03-08 22:54:31,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:31,676 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:54:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:54:31,677 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:54:31,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2025-03-08 22:54:31,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 22:54:31,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 22:54:31,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:31,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:31,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 22:54:31,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:54:31,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:54:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:54:31,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:36,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1188431282] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:54:36,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:54:36,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2025-03-08 22:54:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546065343] [2025-03-08 22:54:36,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:54:36,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:54:36,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:36,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:54:36,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:54:36,112 INFO L87 Difference]: Start difference. First operand 499 states and 697 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:40,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:54:44,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:54:48,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:54:53,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:54:57,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:54:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:57,794 INFO L93 Difference]: Finished difference Result 578 states and 782 transitions. [2025-03-08 22:54:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 22:54:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2025-03-08 22:54:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:57,796 INFO L225 Difference]: With dead ends: 578 [2025-03-08 22:54:57,796 INFO L226 Difference]: Without dead ends: 578 [2025-03-08 22:54:57,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2025-03-08 22:54:57,797 INFO L435 NwaCegarLoop]: 151 mSDtfsCounter, 746 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 104 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:57,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 485 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 640 Invalid, 5 Unknown, 0 Unchecked, 21.6s Time] [2025-03-08 22:54:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2025-03-08 22:54:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 498. [2025-03-08 22:54:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 345 states have (on average 1.7739130434782608) internal successors, (612), 457 states have internal predecessors, (612), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:54:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 695 transitions. [2025-03-08 22:54:57,811 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 695 transitions. Word has length 21 [2025-03-08 22:54:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:57,811 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 695 transitions. [2025-03-08 22:54:57,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:54:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 695 transitions. [2025-03-08 22:54:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 22:54:57,812 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:57,812 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:57,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2025-03-08 22:54:58,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 22:54:58,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:58,214 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:58,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2063761917, now seen corresponding path program 1 times [2025-03-08 22:54:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166914303] [2025-03-08 22:54:58,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:58,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:58,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:58,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:58,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 22:54:58,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 22:54:58,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 22:54:58,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:58,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:58,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 22:54:58,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:58,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-08 22:54:58,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:54:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 22:54:58,416 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:54:58,416 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:58,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166914303] [2025-03-08 22:54:58,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166914303] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:54:58,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:54:58,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:54:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601455043] [2025-03-08 22:54:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:54:58,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:58,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:58,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:58,417 INFO L87 Difference]: Start difference. First operand 498 states and 695 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:54:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:58,944 INFO L93 Difference]: Finished difference Result 521 states and 719 transitions. [2025-03-08 22:54:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:54:58,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2025-03-08 22:54:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:58,946 INFO L225 Difference]: With dead ends: 521 [2025-03-08 22:54:58,946 INFO L226 Difference]: Without dead ends: 521 [2025-03-08 22:54:58,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:54:58,946 INFO L435 NwaCegarLoop]: 323 mSDtfsCounter, 37 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:58,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1074 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 22:54:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2025-03-08 22:54:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 498. [2025-03-08 22:54:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 345 states have (on average 1.771014492753623) internal successors, (611), 457 states have internal predecessors, (611), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:54:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 694 transitions. [2025-03-08 22:54:58,954 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 694 transitions. Word has length 23 [2025-03-08 22:54:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:58,955 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 694 transitions. [2025-03-08 22:54:58,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:54:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 694 transitions. [2025-03-08 22:54:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 22:54:58,956 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:58,956 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:58,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 22:54:59,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:59,157 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:59,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1808901300, now seen corresponding path program 1 times [2025-03-08 22:54:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252503921] [2025-03-08 22:54:59,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:59,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:59,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:59,160 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:59,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 22:54:59,217 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 22:54:59,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:54:59,224 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:59,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:59,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:54:59,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 22:54:59,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:54:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 22:54:59,261 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:54:59,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252503921] [2025-03-08 22:54:59,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252503921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:54:59,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:54:59,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2025-03-08 22:54:59,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329894212] [2025-03-08 22:54:59,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:54:59,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:54:59,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:54:59,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:54:59,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:59,262 INFO L87 Difference]: Start difference. First operand 498 states and 694 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:54:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:54:59,289 INFO L93 Difference]: Finished difference Result 497 states and 692 transitions. [2025-03-08 22:54:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:54:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-08 22:54:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:54:59,291 INFO L225 Difference]: With dead ends: 497 [2025-03-08 22:54:59,291 INFO L226 Difference]: Without dead ends: 497 [2025-03-08 22:54:59,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:54:59,292 INFO L435 NwaCegarLoop]: 329 mSDtfsCounter, 200 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:54:59,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1095 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:54:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2025-03-08 22:54:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2025-03-08 22:54:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 345 states have (on average 1.7652173913043478) internal successors, (609), 456 states have internal predecessors, (609), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:54:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 692 transitions. [2025-03-08 22:54:59,300 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 692 transitions. Word has length 25 [2025-03-08 22:54:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:54:59,301 INFO L471 AbstractCegarLoop]: Abstraction has 497 states and 692 transitions. [2025-03-08 22:54:59,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:54:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 692 transitions. [2025-03-08 22:54:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 22:54:59,302 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:54:59,302 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:54:59,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 22:54:59,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:59,502 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr100REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:54:59,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:54:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1808901021, now seen corresponding path program 1 times [2025-03-08 22:54:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:54:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510882797] [2025-03-08 22:54:59,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:54:59,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:54:59,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:54:59,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:54:59,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 22:54:59,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 22:54:59,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:54:59,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:54:59,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:54:59,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 22:54:59,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:54:59,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:54:59,636 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-08 22:54:59,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 22:54:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:54:59,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:55:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:55:03,777 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:03,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510882797] [2025-03-08 22:55:03,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510882797] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:55:03,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:55:03,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2025-03-08 22:55:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93410590] [2025-03-08 22:55:03,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:55:03,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:55:03,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:03,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:55:03,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:55:03,778 INFO L87 Difference]: Start difference. First operand 497 states and 692 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 22:55:08,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:55:12,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-08 22:55:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:12,795 INFO L93 Difference]: Finished difference Result 543 states and 750 transitions. [2025-03-08 22:55:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:55:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2025-03-08 22:55:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:12,801 INFO L225 Difference]: With dead ends: 543 [2025-03-08 22:55:12,801 INFO L226 Difference]: Without dead ends: 543 [2025-03-08 22:55:12,801 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:55:12,801 INFO L435 NwaCegarLoop]: 247 mSDtfsCounter, 218 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:12,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 901 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 749 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2025-03-08 22:55:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2025-03-08 22:55:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 508. [2025-03-08 22:55:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 355 states have (on average 1.7577464788732395) internal successors, (624), 465 states have internal predecessors, (624), 34 states have call successors, (34), 9 states have call predecessors, (34), 11 states have return successors, (52), 38 states have call predecessors, (52), 34 states have call successors, (52) [2025-03-08 22:55:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 710 transitions. [2025-03-08 22:55:12,810 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 710 transitions. Word has length 25 [2025-03-08 22:55:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:12,810 INFO L471 AbstractCegarLoop]: Abstraction has 508 states and 710 transitions. [2025-03-08 22:55:12,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 22:55:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 710 transitions. [2025-03-08 22:55:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 22:55:12,811 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:12,812 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:12,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 22:55:13,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:13,012 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr101REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:55:13,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1808901020, now seen corresponding path program 1 times [2025-03-08 22:55:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078737115] [2025-03-08 22:55:13,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:13,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:13,016 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 22:55:13,074 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 22:55:13,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:55:13,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:13,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:13,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 22:55:13,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:13,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:55:13,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:55:13,178 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-03-08 22:55:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:13,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:55:13,201 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:13,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2025-03-08 22:55:13,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:55:17,363 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:17,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078737115] [2025-03-08 22:55:17,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078737115] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:55:17,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [846784796] [2025-03-08 22:55:17,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:17,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:55:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:55:17,365 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:55:17,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2025-03-08 22:55:17,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 22:55:17,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:55:17,491 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:17,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:17,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 22:55:17,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:17,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:55:17,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-08 22:55:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:55:17,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:55:17,571 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-08 22:55:17,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-08 22:55:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2025-03-08 22:55:17,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:55:17,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [846784796] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:55:17,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:55:17,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2025-03-08 22:55:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509396117] [2025-03-08 22:55:17,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:55:17,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 22:55:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:17,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 22:55:17,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=69, Unknown=2, NotChecked=16, Total=110 [2025-03-08 22:55:17,693 INFO L87 Difference]: Start difference. First operand 508 states and 710 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:55:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:19,844 INFO L93 Difference]: Finished difference Result 820 states and 1098 transitions. [2025-03-08 22:55:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:55:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-08 22:55:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:19,847 INFO L225 Difference]: With dead ends: 820 [2025-03-08 22:55:19,847 INFO L226 Difference]: Without dead ends: 820 [2025-03-08 22:55:19,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=30, Invalid=104, Unknown=2, NotChecked=20, Total=156 [2025-03-08 22:55:19,848 INFO L435 NwaCegarLoop]: 478 mSDtfsCounter, 389 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 706 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:19,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2040 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1807 Invalid, 0 Unknown, 706 Unchecked, 2.1s Time] [2025-03-08 22:55:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2025-03-08 22:55:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 508. [2025-03-08 22:55:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 355 states have (on average 1.7521126760563381) internal successors, (622), 465 states have internal predecessors, (622), 34 states have call successors, (34), 9 states have call predecessors, (34), 11 states have return successors, (52), 38 states have call predecessors, (52), 34 states have call successors, (52) [2025-03-08 22:55:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 708 transitions. [2025-03-08 22:55:19,856 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 708 transitions. Word has length 25 [2025-03-08 22:55:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:19,856 INFO L471 AbstractCegarLoop]: Abstraction has 508 states and 708 transitions. [2025-03-08 22:55:19,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:55:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 708 transitions. [2025-03-08 22:55:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 22:55:19,856 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:19,856 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:19,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2025-03-08 22:55:20,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 22:55:20,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:20,257 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr100REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:55:20,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:20,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1980507650, now seen corresponding path program 1 times [2025-03-08 22:55:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:20,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021542880] [2025-03-08 22:55:20,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:20,263 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:20,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 22:55:20,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 22:55:20,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:55:20,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:20,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:20,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 22:55:20,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:55:20,367 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:20,367 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:20,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021542880] [2025-03-08 22:55:20,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021542880] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:20,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:20,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:55:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59046726] [2025-03-08 22:55:20,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:20,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:55:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:20,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:55:20,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:55:20,368 INFO L87 Difference]: Start difference. First operand 508 states and 708 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:55:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:20,392 INFO L93 Difference]: Finished difference Result 498 states and 691 transitions. [2025-03-08 22:55:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:55:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-08 22:55:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:20,395 INFO L225 Difference]: With dead ends: 498 [2025-03-08 22:55:20,395 INFO L226 Difference]: Without dead ends: 498 [2025-03-08 22:55:20,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:55:20,400 INFO L435 NwaCegarLoop]: 339 mSDtfsCounter, 0 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:20,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1341 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:55:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2025-03-08 22:55:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2025-03-08 22:55:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 348 states have (on average 1.7471264367816093) internal successors, (608), 457 states have internal predecessors, (608), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:55:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 691 transitions. [2025-03-08 22:55:20,406 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 691 transitions. Word has length 25 [2025-03-08 22:55:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:20,406 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 691 transitions. [2025-03-08 22:55:20,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 22:55:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 691 transitions. [2025-03-08 22:55:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 22:55:20,407 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:20,407 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-08 22:55:20,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:20,608 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:55:20,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -241365377, now seen corresponding path program 1 times [2025-03-08 22:55:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:20,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112328520] [2025-03-08 22:55:20,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:20,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:20,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:20,610 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:20,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 22:55:20,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 22:55:20,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 22:55:20,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:20,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:20,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:55:20,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 22:55:20,719 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:20,719 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112328520] [2025-03-08 22:55:20,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112328520] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:20,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:20,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:55:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573419128] [2025-03-08 22:55:20,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:20,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:55:20,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:20,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:55:20,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:55:20,720 INFO L87 Difference]: Start difference. First operand 498 states and 691 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 22:55:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:20,759 INFO L93 Difference]: Finished difference Result 823 states and 1184 transitions. [2025-03-08 22:55:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:55:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2025-03-08 22:55:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:20,761 INFO L225 Difference]: With dead ends: 823 [2025-03-08 22:55:20,762 INFO L226 Difference]: Without dead ends: 823 [2025-03-08 22:55:20,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:55:20,762 INFO L435 NwaCegarLoop]: 456 mSDtfsCounter, 196 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:20,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1694 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:55:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2025-03-08 22:55:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 498. [2025-03-08 22:55:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 348 states have (on average 1.7442528735632183) internal successors, (607), 457 states have internal predecessors, (607), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:55:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 690 transitions. [2025-03-08 22:55:20,774 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 690 transitions. Word has length 26 [2025-03-08 22:55:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:20,774 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 690 transitions. [2025-03-08 22:55:20,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 22:55:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 690 transitions. [2025-03-08 22:55:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 22:55:20,775 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:20,775 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:20,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 22:55:20,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:20,975 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:55:20,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:20,978 INFO L85 PathProgramCache]: Analyzing trace with hash 646138304, now seen corresponding path program 1 times [2025-03-08 22:55:20,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:20,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556395863] [2025-03-08 22:55:20,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:20,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:20,980 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:20,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 22:55:21,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 22:55:21,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 22:55:21,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:21,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:21,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 22:55:21,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:55:21,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:55:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 22:55:21,126 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556395863] [2025-03-08 22:55:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556395863] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:55:21,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:55:21,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2025-03-08 22:55:21,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625965199] [2025-03-08 22:55:21,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:55:21,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:55:21,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:21,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:55:21,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:55:21,126 INFO L87 Difference]: Start difference. First operand 498 states and 690 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 22:55:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:21,326 INFO L93 Difference]: Finished difference Result 497 states and 687 transitions. [2025-03-08 22:55:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:55:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2025-03-08 22:55:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:21,330 INFO L225 Difference]: With dead ends: 497 [2025-03-08 22:55:21,330 INFO L226 Difference]: Without dead ends: 497 [2025-03-08 22:55:21,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:55:21,330 INFO L435 NwaCegarLoop]: 294 mSDtfsCounter, 502 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:21,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 925 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:55:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2025-03-08 22:55:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2025-03-08 22:55:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 348 states have (on average 1.735632183908046) internal successors, (604), 456 states have internal predecessors, (604), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:55:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 687 transitions. [2025-03-08 22:55:21,337 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 687 transitions. Word has length 26 [2025-03-08 22:55:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:21,337 INFO L471 AbstractCegarLoop]: Abstraction has 497 states and 687 transitions. [2025-03-08 22:55:21,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 22:55:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 687 transitions. [2025-03-08 22:55:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 22:55:21,338 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:21,338 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:21,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 22:55:21,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:21,539 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:55:21,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash 925600629, now seen corresponding path program 1 times [2025-03-08 22:55:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924355515] [2025-03-08 22:55:21,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:21,542 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:21,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 22:55:21,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 22:55:21,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 22:55:21,615 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:21,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:21,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 22:55:21,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:21,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-08 22:55:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 22:55:21,671 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:21,671 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:21,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924355515] [2025-03-08 22:55:21,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924355515] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:21,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:21,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:55:21,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485947974] [2025-03-08 22:55:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:21,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:55:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:21,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:55:21,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:55:21,672 INFO L87 Difference]: Start difference. First operand 497 states and 687 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:55:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:22,181 INFO L93 Difference]: Finished difference Result 525 states and 718 transitions. [2025-03-08 22:55:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 22:55:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2025-03-08 22:55:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:22,182 INFO L225 Difference]: With dead ends: 525 [2025-03-08 22:55:22,182 INFO L226 Difference]: Without dead ends: 525 [2025-03-08 22:55:22,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:55:22,183 INFO L435 NwaCegarLoop]: 318 mSDtfsCounter, 41 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:22,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1225 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 22:55:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2025-03-08 22:55:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 498. [2025-03-08 22:55:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 350 states have (on average 1.7342857142857142) internal successors, (607), 457 states have internal predecessors, (607), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:55:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 690 transitions. [2025-03-08 22:55:22,189 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 690 transitions. Word has length 26 [2025-03-08 22:55:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:22,189 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 690 transitions. [2025-03-08 22:55:22,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:55:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 690 transitions. [2025-03-08 22:55:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 22:55:22,190 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:22,190 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:22,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-08 22:55:22,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:22,391 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:55:22,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash 925600630, now seen corresponding path program 1 times [2025-03-08 22:55:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287410560] [2025-03-08 22:55:22,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:22,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:22,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:22,393 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:22,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 22:55:22,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 22:55:22,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 22:55:22,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:22,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:22,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 22:55:22,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:22,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 22:55:22,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-08 22:55:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 22:55:22,635 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:55:22,635 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:22,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287410560] [2025-03-08 22:55:22,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287410560] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:55:22,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:55:22,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:55:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933497549] [2025-03-08 22:55:22,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:55:22,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:55:22,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:22,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:55:22,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:55:22,635 INFO L87 Difference]: Start difference. First operand 498 states and 690 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:55:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:55:22,922 INFO L93 Difference]: Finished difference Result 504 states and 695 transitions. [2025-03-08 22:55:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:55:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2025-03-08 22:55:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:55:22,925 INFO L225 Difference]: With dead ends: 504 [2025-03-08 22:55:22,925 INFO L226 Difference]: Without dead ends: 504 [2025-03-08 22:55:22,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:55:22,926 INFO L435 NwaCegarLoop]: 327 mSDtfsCounter, 9 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 22:55:22,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1234 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 22:55:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2025-03-08 22:55:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 500. [2025-03-08 22:55:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 352 states have (on average 1.7301136363636365) internal successors, (609), 459 states have internal predecessors, (609), 33 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (50), 36 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-08 22:55:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 692 transitions. [2025-03-08 22:55:22,933 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 692 transitions. Word has length 26 [2025-03-08 22:55:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:55:22,933 INFO L471 AbstractCegarLoop]: Abstraction has 500 states and 692 transitions. [2025-03-08 22:55:22,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 22:55:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 692 transitions. [2025-03-08 22:55:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 22:55:22,933 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:55:22,933 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:55:22,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 22:55:23,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:23,138 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr1ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2025-03-08 22:55:23,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:55:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash 443986751, now seen corresponding path program 1 times [2025-03-08 22:55:23,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-08 22:55:23,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605852957] [2025-03-08 22:55:23,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:23,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:55:23,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:55:23,141 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:55:23,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 22:55:23,207 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 22:55:23,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 22:55:23,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:23,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:23,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 22:55:23,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:23,314 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_28| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~client~0#1.base_28| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~client~0#1.base_28|)))) is different from true [2025-03-08 22:55:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:55:23,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:55:23,408 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2025-03-08 22:55:23,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2025-03-08 22:55:23,553 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-08 22:55:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605852957] [2025-03-08 22:55:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605852957] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:55:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501592402] [2025-03-08 22:55:23,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:55:23,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-08 22:55:23,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-08 22:55:23,555 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-08 22:55:23,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2025-03-08 22:55:23,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 22:55:23,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 22:55:23,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:55:23,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:55:23,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 22:55:23,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:55:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:55:23,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:55:23,878 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2025-03-08 22:55:23,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2025-03-08 22:55:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501592402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:55:23,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:55:23,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2025-03-08 22:55:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327969002] [2025-03-08 22:55:23,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:55:23,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 22:55:23,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-08 22:55:23,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 22:55:23,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=106, Unknown=1, NotChecked=20, Total=156 [2025-03-08 22:55:23,954 INFO L87 Difference]: Start difference. First operand 500 states and 692 transitions. Second operand has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)