./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB --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 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:44:39,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:44:39,887 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:44:39,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:44:39,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:44:39,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:44:39,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:44:39,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:44:39,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:44:39,919 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:44:39,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:44:39,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:44:39,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:44:39,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:44:39,920 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:44:39,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:44:39,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:44:39,920 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:44:39,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:44:39,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:44:39,921 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:44:39,921 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:44:39,921 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:44:39,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:44:39,921 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:44:39,922 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:44:39,922 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:44:39,922 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:44:39,922 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:44:39,922 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:44:39,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:39,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:39,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:39,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:39,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:44:39,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:39,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:39,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:39,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:39,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:44:39,924 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:44:39,924 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:44:39,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:44:39,924 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:44:39,924 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:44:39,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:44:39,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:44:39,925 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 [2024-11-28 02:44:40,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:44:40,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:44:40,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:44:40,223 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:44:40,223 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:44:40,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2024-11-28 02:44:45,208 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/4f7241b7c/16be923b102b4368bec8f780728f1102/FLAG99b1c9278 [2024-11-28 02:44:45,643 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:44:45,646 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2024-11-28 02:44:45,666 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/4f7241b7c/16be923b102b4368bec8f780728f1102/FLAG99b1c9278 [2024-11-28 02:44:45,792 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/4f7241b7c/16be923b102b4368bec8f780728f1102 [2024-11-28 02:44:45,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:44:45,798 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:44:45,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:45,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:44:45,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:44:45,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:45" (1/1) ... [2024-11-28 02:44:45,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea360b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:45, skipping insertion in model container [2024-11-28 02:44:45,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:45" (1/1) ... [2024-11-28 02:44:45,863 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:44:46,260 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:44:46,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:46,343 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) [2024-11-28 02:44:46,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35fa1afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:46, skipping insertion in model container [2024-11-28 02:44:46,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:46,344 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-28 02:44:46,346 INFO L158 Benchmark]: Toolchain (without parser) took 548.21ms. Allocated memory is still 142.6MB. Free memory was 116.8MB in the beginning and 102.8MB in the end (delta: 14.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:44:46,347 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:44:46,347 INFO L158 Benchmark]: CACSL2BoogieTranslator took 545.41ms. Allocated memory is still 142.6MB. Free memory was 116.5MB in the beginning and 102.8MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:44:46,348 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 545.41ms. Allocated memory is still 142.6MB. Free memory was 116.5MB in the beginning and 102.8MB in the end (delta: 13.7MB). 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: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB --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 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:44:48,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:44:48,869 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 02:44:48,875 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:44:48,875 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:44:48,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:44:48,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:44:48,909 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:44:48,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:44:48,910 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:44:48,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:44:48,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:44:48,911 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:44:48,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:44:48,911 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:44:48,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:44:48,911 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:44:48,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:44:48,911 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:44:48,912 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:44:48,913 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:48,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:44:48,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:44:48,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:44:48,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:48,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:44:48,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:44:48,914 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 02:44:48,915 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 02:44:48,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:44:48,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:44:48,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:44:48,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:44:48,915 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 [2024-11-28 02:44:49,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:44:49,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:44:49,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:44:49,270 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:44:49,271 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:44:49,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2024-11-28 02:44:52,388 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/c2d41319e/b5274b2f6c4148d197d34cae3f0b5c60/FLAGfefa96a51 [2024-11-28 02:44:52,776 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:44:52,780 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2024-11-28 02:44:52,802 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/c2d41319e/b5274b2f6c4148d197d34cae3f0b5c60/FLAGfefa96a51 [2024-11-28 02:44:52,821 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/data/c2d41319e/b5274b2f6c4148d197d34cae3f0b5c60 [2024-11-28 02:44:52,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:44:52,827 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:44:52,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:52,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:44:52,834 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:44:52,835 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:52" (1/1) ... [2024-11-28 02:44:52,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5608ab03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:52, skipping insertion in model container [2024-11-28 02:44:52,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:44:52" (1/1) ... [2024-11-28 02:44:52,879 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:44:53,191 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:44:53,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:53,259 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-28 02:44:53,269 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:44:53,301 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:44:53,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:53,332 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:44:53,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:44:53,462 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:44:53,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53 WrapperNode [2024-11-28 02:44:53,463 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:44:53,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:44:53,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:44:53,464 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:44:53,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,514 INFO L138 Inliner]: procedures = 167, calls = 72, calls flagged for inlining = 24, calls inlined = 18, statements flattened = 124 [2024-11-28 02:44:53,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:44:53,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:44:53,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:44:53,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:44:53,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,578 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2024-11-28 02:44:53,578 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,578 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,592 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,596 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,598 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:44:53,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:44:53,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:44:53,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:44:53,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (1/1) ... [2024-11-28 02:44:53,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:44:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:53,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:44:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:44:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 02:44:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 02:44:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2024-11-28 02:44:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2024-11-28 02:44:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-28 02:44:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-28 02:44:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2024-11-28 02:44:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2024-11-28 02:44:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:44:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:44:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 02:44:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 02:44:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 02:44:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 02:44:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 02:44:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 02:44:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:44:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 02:44:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 02:44:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:44:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:44:53,835 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:44:53,837 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:44:54,337 INFO L? ?]: Removed 137 outVars from TransFormulas that were not future-live. [2024-11-28 02:44:54,337 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:44:54,348 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:44:54,348 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 02:44:54,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:44:54 BoogieIcfgContainer [2024-11-28 02:44:54,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:44:54,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:44:54,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:44:54,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:44:54,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:44:52" (1/3) ... [2024-11-28 02:44:54,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d7fbf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:44:54, skipping insertion in model container [2024-11-28 02:44:54,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:44:53" (2/3) ... [2024-11-28 02:44:54,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d7fbf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:44:54, skipping insertion in model container [2024-11-28 02:44:54,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:44:54" (3/3) ... [2024-11-28 02:44:54,361 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test22_4.i [2024-11-28 02:44:54,376 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:44:54,377 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test22_4.i that has 4 procedures, 90 locations, 1 initial locations, 1 loop locations, and 25 error locations. [2024-11-28 02:44:54,418 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:44:54,432 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;@2222de98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:44:54,433 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-28 02:44:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 84 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:44:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 02:44:54,442 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:54,443 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:54,443 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:54,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1283799053, now seen corresponding path program 1 times [2024-11-28 02:44:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:54,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913082502] [2024-11-28 02:44:54,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:54,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:54,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:54,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:54,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:44:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:54,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:44:54,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:54,678 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 [2024-11-28 02:44:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:54,757 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:54,758 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913082502] [2024-11-28 02:44:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913082502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:54,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:44:54,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281954432] [2024-11-28 02:44:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:54,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:44:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:54,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:44:54,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:44:54,793 INFO L87 Difference]: Start difference. First operand has 90 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 84 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-28 02:44:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:55,219 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2024-11-28 02:44:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:44:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2024-11-28 02:44:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:55,229 INFO L225 Difference]: With dead ends: 108 [2024-11-28 02:44:55,229 INFO L226 Difference]: Without dead ends: 106 [2024-11-28 02:44:55,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:44:55,234 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 23 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:55,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 325 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:44:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-28 02:44:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2024-11-28 02:44:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 86 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2024-11-28 02:44:55,286 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 10 [2024-11-28 02:44:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:55,287 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2024-11-28 02:44:55,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-28 02:44:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2024-11-28 02:44:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 02:44:55,288 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:55,288 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:55,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:44:55,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:55,492 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:55,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:55,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1312428204, now seen corresponding path program 1 times [2024-11-28 02:44:55,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:55,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379143634] [2024-11-28 02:44:55,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:55,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:55,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:44:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:55,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:44:55,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:55,653 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:55,653 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:55,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379143634] [2024-11-28 02:44:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379143634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:55,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:44:55,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826822952] [2024-11-28 02:44:55,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:55,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:44:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:55,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:44:55,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:44:55,656 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-28 02:44:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:55,693 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-28 02:44:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:44:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2024-11-28 02:44:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:55,695 INFO L225 Difference]: With dead ends: 91 [2024-11-28 02:44:55,695 INFO L226 Difference]: Without dead ends: 91 [2024-11-28 02:44:55,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:44:55,696 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:55,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 374 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-28 02:44:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-28 02:44:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 84 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-28 02:44:55,704 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 10 [2024-11-28 02:44:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:55,704 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-28 02:44:55,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-28 02:44:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-28 02:44:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 02:44:55,705 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:55,705 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:55,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:44:55,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:55,906 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:55,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1143065090, now seen corresponding path program 1 times [2024-11-28 02:44:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025788775] [2024-11-28 02:44:55,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:55,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:55,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:55,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:44:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:55,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:44:56,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:56,021 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 [2024-11-28 02:44:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:56,148 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:56,148 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025788775] [2024-11-28 02:44:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025788775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:56,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:56,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:44:56,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857888011] [2024-11-28 02:44:56,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:56,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:44:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:56,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:44:56,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:44:56,150 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2024-11-28 02:44:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:56,545 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2024-11-28 02:44:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:44:56,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2024-11-28 02:44:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:56,547 INFO L225 Difference]: With dead ends: 90 [2024-11-28 02:44:56,547 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 02:44:56,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:44:56,548 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 19 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:56,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 405 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:44:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 02:44:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-28 02:44:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 83 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2024-11-28 02:44:56,563 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 11 [2024-11-28 02:44:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:56,563 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2024-11-28 02:44:56,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2024-11-28 02:44:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2024-11-28 02:44:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:44:56,565 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:56,565 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:56,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:44:56,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:56,769 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:56,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:56,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1075252755, now seen corresponding path program 1 times [2024-11-28 02:44:56,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:56,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224988624] [2024-11-28 02:44:56,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:56,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:56,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:56,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:56,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:44:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:56,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:44:56,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:56,912 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:56,912 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224988624] [2024-11-28 02:44:56,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224988624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:56,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:56,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:44:56,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191819114] [2024-11-28 02:44:56,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:56,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:44:56,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:56,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:44:56,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:44:56,914 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 02:44:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:56,946 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2024-11-28 02:44:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:44:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2024-11-28 02:44:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:56,948 INFO L225 Difference]: With dead ends: 90 [2024-11-28 02:44:56,948 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 02:44:56,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:44:56,949 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 15 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:56,949 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 339 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 02:44:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-28 02:44:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.5) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2024-11-28 02:44:56,955 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 12 [2024-11-28 02:44:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:56,956 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2024-11-28 02:44:56,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 02:44:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2024-11-28 02:44:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 02:44:56,956 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:56,957 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:56,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:44:57,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:57,161 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:57,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1476904206, now seen corresponding path program 1 times [2024-11-28 02:44:57,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:57,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285391594] [2024-11-28 02:44:57,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:57,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:57,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:57,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:44:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:57,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:44:57,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:57,312 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:57,312 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285391594] [2024-11-28 02:44:57,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285391594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:57,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:57,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:44:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662422825] [2024-11-28 02:44:57,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:57,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:44:57,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:57,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:44:57,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:57,317 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 02:44:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:57,349 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-11-28 02:44:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:44:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2024-11-28 02:44:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:57,350 INFO L225 Difference]: With dead ends: 93 [2024-11-28 02:44:57,350 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 02:44:57,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:57,351 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 1 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:57,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 268 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 02:44:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2024-11-28 02:44:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-28 02:44:57,363 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 12 [2024-11-28 02:44:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:57,364 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-28 02:44:57,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-28 02:44:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-28 02:44:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 02:44:57,368 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:57,368 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:57,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:44:57,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:57,569 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:57,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash -444670213, now seen corresponding path program 1 times [2024-11-28 02:44:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:57,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037291955] [2024-11-28 02:44:57,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:57,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:57,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:57,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:57,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:44:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:57,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 02:44:57,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:57,669 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 [2024-11-28 02:44:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:57,779 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:57,779 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037291955] [2024-11-28 02:44:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037291955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:57,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:57,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 02:44:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318756236] [2024-11-28 02:44:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:57,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:44:57,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:57,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:44:57,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:44:57,781 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-28 02:44:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:58,188 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2024-11-28 02:44:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:44:58,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 16 [2024-11-28 02:44:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:58,190 INFO L225 Difference]: With dead ends: 92 [2024-11-28 02:44:58,190 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 02:44:58,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:44:58,191 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 14 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:58,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 412 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:44:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 02:44:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2024-11-28 02:44:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.467741935483871) internal successors, (91), 84 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-28 02:44:58,204 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 16 [2024-11-28 02:44:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:58,204 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-28 02:44:58,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-28 02:44:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-28 02:44:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 02:44:58,204 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:58,204 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:58,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:44:58,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:58,411 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:58,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -444670212, now seen corresponding path program 1 times [2024-11-28 02:44:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:58,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402800230] [2024-11-28 02:44:58,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:58,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:58,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:58,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:58,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:44:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:58,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:44:58,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:58,525 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:58,525 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402800230] [2024-11-28 02:44:58,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402800230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:58,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:58,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:44:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043861892] [2024-11-28 02:44:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:58,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:44:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:58,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:44:58,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:58,527 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-28 02:44:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:58,554 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2024-11-28 02:44:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:44:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 16 [2024-11-28 02:44:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:58,555 INFO L225 Difference]: With dead ends: 92 [2024-11-28 02:44:58,556 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 02:44:58,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:44:58,558 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:58,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 178 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 02:44:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-28 02:44:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-28 02:44:58,569 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 16 [2024-11-28 02:44:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:58,569 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-28 02:44:58,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-28 02:44:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-28 02:44:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:44:58,570 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:58,570 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:58,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:44:58,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:58,771 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:58,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash -959133779, now seen corresponding path program 1 times [2024-11-28 02:44:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:58,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682637530] [2024-11-28 02:44:58,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:58,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:58,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:58,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:44:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:58,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:44:58,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:58,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:44:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:58,964 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:58,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682637530] [2024-11-28 02:44:58,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682637530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:44:58,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:44:58,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-28 02:44:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552216731] [2024-11-28 02:44:58,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:44:58,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:44:58,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:58,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:44:58,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:44:58,967 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2024-11-28 02:44:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:59,041 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-11-28 02:44:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:44:59,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 17 [2024-11-28 02:44:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:59,043 INFO L225 Difference]: With dead ends: 95 [2024-11-28 02:44:59,043 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 02:44:59,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:44:59,044 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:59,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 353 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 02:44:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-28 02:44:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 88 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 02:44:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2024-11-28 02:44:59,054 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 17 [2024-11-28 02:44:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:59,054 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2024-11-28 02:44:59,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2024-11-28 02:44:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2024-11-28 02:44:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:44:59,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:59,055 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:59,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:44:59,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:59,255 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:59,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1989562571, now seen corresponding path program 1 times [2024-11-28 02:44:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:59,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155589119] [2024-11-28 02:44:59,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:44:59,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:59,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:59,258 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:59,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:44:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:44:59,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:44:59,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:44:59,463 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:44:59,464 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:44:59,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155589119] [2024-11-28 02:44:59,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155589119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:44:59,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:44:59,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:44:59,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463483162] [2024-11-28 02:44:59,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:44:59,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:44:59,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:44:59,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:44:59,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:44:59,466 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:44:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:44:59,519 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2024-11-28 02:44:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:44:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-28 02:44:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:44:59,521 INFO L225 Difference]: With dead ends: 104 [2024-11-28 02:44:59,521 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 02:44:59,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:44:59,522 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 3 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:44:59,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 440 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:44:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 02:44:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2024-11-28 02:44:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 95 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-28 02:44:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2024-11-28 02:44:59,532 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 18 [2024-11-28 02:44:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:44:59,533 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2024-11-28 02:44:59,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:44:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2024-11-28 02:44:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 02:44:59,533 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:44:59,533 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:44:59,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:44:59,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:59,734 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:44:59,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:44:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2146696388, now seen corresponding path program 2 times [2024-11-28 02:44:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:44:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527287242] [2024-11-28 02:44:59,735 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:44:59,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:44:59,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:44:59,736 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:44:59,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:44:59,826 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:44:59,826 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:44:59,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:44:59,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:44:59,861 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 [2024-11-28 02:45:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:00,077 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:00,077 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:00,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527287242] [2024-11-28 02:45:00,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527287242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:00,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:45:00,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919086002] [2024-11-28 02:45:00,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:00,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:45:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:00,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:45:00,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:45:00,079 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2024-11-28 02:45:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:00,577 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2024-11-28 02:45:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:45:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 20 [2024-11-28 02:45:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:00,580 INFO L225 Difference]: With dead ends: 103 [2024-11-28 02:45:00,580 INFO L226 Difference]: Without dead ends: 103 [2024-11-28 02:45:00,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:45:00,581 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 13 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:00,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 531 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-28 02:45:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2024-11-28 02:45:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 94 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-28 02:45:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2024-11-28 02:45:00,591 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 20 [2024-11-28 02:45:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:00,591 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2024-11-28 02:45:00,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2024-11-28 02:45:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2024-11-28 02:45:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 02:45:00,591 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:00,592 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:00,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:45:00,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:00,792 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:00,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash 555773483, now seen corresponding path program 1 times [2024-11-28 02:45:00,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:00,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289003431] [2024-11-28 02:45:00,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:00,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:00,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:00,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:00,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:45:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:00,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:45:00,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:00,929 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:00,929 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289003431] [2024-11-28 02:45:00,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289003431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:00,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:00,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:45:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796397736] [2024-11-28 02:45:00,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:00,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:45:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:00,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:45:00,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:45:00,930 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) 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) [2024-11-28 02:45:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:01,083 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2024-11-28 02:45:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:45:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) 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 21 [2024-11-28 02:45:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:01,085 INFO L225 Difference]: With dead ends: 108 [2024-11-28 02:45:01,085 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 02:45:01,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:45:01,085 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 31 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:01,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 175 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 02:45:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2024-11-28 02:45:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 82 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2024-11-28 02:45:01,093 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 21 [2024-11-28 02:45:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:01,093 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2024-11-28 02:45:01,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) 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) [2024-11-28 02:45:01,094 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2024-11-28 02:45:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 02:45:01,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:01,094 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:01,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:45:01,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:01,295 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:01,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:01,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1392432837, now seen corresponding path program 1 times [2024-11-28 02:45:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:01,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143419635] [2024-11-28 02:45:01,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:01,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:01,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:01,297 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:01,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:45:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:01,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:45:01,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:01,472 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:01,472 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:01,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143419635] [2024-11-28 02:45:01,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143419635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:01,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:01,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:45:01,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799365027] [2024-11-28 02:45:01,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:01,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:45:01,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:01,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:45:01,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:45:01,474 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-11-28 02:45:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:01,514 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-11-28 02:45:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:45:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 22 [2024-11-28 02:45:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:01,515 INFO L225 Difference]: With dead ends: 88 [2024-11-28 02:45:01,515 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 02:45:01,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:45:01,516 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 7 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:01,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 403 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:45:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 02:45:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-28 02:45:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2024-11-28 02:45:01,522 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 22 [2024-11-28 02:45:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:01,523 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2024-11-28 02:45:01,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-11-28 02:45:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2024-11-28 02:45:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 02:45:01,523 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:01,524 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:01,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:45:01,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:01,724 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:01,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash -944423643, now seen corresponding path program 1 times [2024-11-28 02:45:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456801223] [2024-11-28 02:45:01,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:01,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:01,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:01,729 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:01,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:45:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:01,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 02:45:01,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:01,856 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 [2024-11-28 02:45:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:01,980 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:01,980 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:01,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456801223] [2024-11-28 02:45:01,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456801223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:01,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:01,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:45:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013541194] [2024-11-28 02:45:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:01,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:45:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:01,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:45:01,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:45:01,982 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:45:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:02,419 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2024-11-28 02:45:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:45:02,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-11-28 02:45:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:02,420 INFO L225 Difference]: With dead ends: 87 [2024-11-28 02:45:02,420 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 02:45:02,420 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:45:02,421 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 14 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:02,421 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 424 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 02:45:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-11-28 02:45:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 80 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2024-11-28 02:45:02,435 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 24 [2024-11-28 02:45:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:02,437 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2024-11-28 02:45:02,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:45:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2024-11-28 02:45:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 02:45:02,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:02,438 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:02,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:45:02,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:02,639 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:02,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash -944423642, now seen corresponding path program 1 times [2024-11-28 02:45:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389982819] [2024-11-28 02:45:02,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:02,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:02,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:02,642 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:02,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:45:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:02,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:45:02,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:02,795 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 [2024-11-28 02:45:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:03,041 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:03,041 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:03,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389982819] [2024-11-28 02:45:03,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389982819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:03,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:03,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:45:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517662388] [2024-11-28 02:45:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:03,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:45:03,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:03,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:45:03,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:45:03,042 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:45:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:03,543 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2024-11-28 02:45:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:45:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-11-28 02:45:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:03,545 INFO L225 Difference]: With dead ends: 85 [2024-11-28 02:45:03,545 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 02:45:03,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:45:03,546 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 12 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:03,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 02:45:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2024-11-28 02:45:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.360655737704918) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2024-11-28 02:45:03,551 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 24 [2024-11-28 02:45:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:03,551 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2024-11-28 02:45:03,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:45:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2024-11-28 02:45:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 02:45:03,552 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:03,553 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:03,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:03,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:03,757 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:03,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash -995066585, now seen corresponding path program 1 times [2024-11-28 02:45:03,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:03,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727369011] [2024-11-28 02:45:03,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:03,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:03,760 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:03,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:45:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:03,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:45:03,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:03,932 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:03,933 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:03,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727369011] [2024-11-28 02:45:03,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727369011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:03,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:03,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 02:45:03,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567765504] [2024-11-28 02:45:03,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:03,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:45:03,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:03,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:45:03,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:45:03,934 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-28 02:45:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:04,002 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2024-11-28 02:45:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:45:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 24 [2024-11-28 02:45:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:04,004 INFO L225 Difference]: With dead ends: 84 [2024-11-28 02:45:04,004 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 02:45:04,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:45:04,005 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 9 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:04,005 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 449 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:45:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 02:45:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-28 02:45:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2024-11-28 02:45:04,011 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 24 [2024-11-28 02:45:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:04,011 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2024-11-28 02:45:04,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-28 02:45:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2024-11-28 02:45:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 02:45:04,012 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:04,012 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:04,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:45:04,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:04,212 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:04,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:04,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2077441188, now seen corresponding path program 1 times [2024-11-28 02:45:04,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:04,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991440696] [2024-11-28 02:45:04,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:04,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:04,215 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:04,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:45:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:04,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:45:04,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:04,359 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 [2024-11-28 02:45:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:04,550 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:04,550 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:04,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991440696] [2024-11-28 02:45:04,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991440696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:04,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:04,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:45:04,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556794805] [2024-11-28 02:45:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:04,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:45:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:04,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:45:04,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:45:04,551 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2024-11-28 02:45:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:04,992 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2024-11-28 02:45:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:45:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 32 [2024-11-28 02:45:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:04,994 INFO L225 Difference]: With dead ends: 89 [2024-11-28 02:45:04,994 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 02:45:04,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:45:04,994 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 57 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:04,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 278 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 02:45:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2024-11-28 02:45:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2024-11-28 02:45:04,998 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 32 [2024-11-28 02:45:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:04,998 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2024-11-28 02:45:04,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2024-11-28 02:45:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2024-11-28 02:45:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 02:45:04,999 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:04,999 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:05,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:05,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:05,200 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:05,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:05,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2077441189, now seen corresponding path program 1 times [2024-11-28 02:45:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:05,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816387778] [2024-11-28 02:45:05,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:05,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:05,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:05,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:45:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:05,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:45:05,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:05,361 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 [2024-11-28 02:45:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:05,670 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:05,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:05,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816387778] [2024-11-28 02:45:05,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816387778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:05,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:05,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:45:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686068964] [2024-11-28 02:45:05,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:05,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:45:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:05,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:45:05,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:45:05,672 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2024-11-28 02:45:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:06,144 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2024-11-28 02:45:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:45:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 32 [2024-11-28 02:45:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:06,146 INFO L225 Difference]: With dead ends: 80 [2024-11-28 02:45:06,146 INFO L226 Difference]: Without dead ends: 80 [2024-11-28 02:45:06,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:45:06,146 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 55 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:06,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 414 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:45:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-28 02:45:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-28 02:45:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.278688524590164) internal successors, (78), 73 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2024-11-28 02:45:06,152 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 32 [2024-11-28 02:45:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:06,152 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2024-11-28 02:45:06,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2024-11-28 02:45:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2024-11-28 02:45:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 02:45:06,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:06,153 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:06,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:06,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:06,354 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:06,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1753335037, now seen corresponding path program 1 times [2024-11-28 02:45:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:06,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774662243] [2024-11-28 02:45:06,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:06,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:06,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:06,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:06,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:45:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:06,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:45:06,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:06,621 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:06,622 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774662243] [2024-11-28 02:45:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774662243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:06,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:06,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 02:45:06,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190759449] [2024-11-28 02:45:06,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:06,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:45:06,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:06,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:45:06,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:45:06,623 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:06,672 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2024-11-28 02:45:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:45:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2024-11-28 02:45:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:06,674 INFO L225 Difference]: With dead ends: 80 [2024-11-28 02:45:06,674 INFO L226 Difference]: Without dead ends: 80 [2024-11-28 02:45:06,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:45:06,675 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 7 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:06,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 409 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:45:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-28 02:45:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-28 02:45:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 73 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2024-11-28 02:45:06,679 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 38 [2024-11-28 02:45:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:06,679 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2024-11-28 02:45:06,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2024-11-28 02:45:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 02:45:06,680 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:06,680 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:06,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:45:06,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:06,880 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:06,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:06,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1829958237, now seen corresponding path program 1 times [2024-11-28 02:45:06,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:06,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039862428] [2024-11-28 02:45:06,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:06,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:06,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:06,883 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:06,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:45:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:07,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 02:45:07,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:07,075 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 [2024-11-28 02:45:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:07,294 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:07,294 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:07,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039862428] [2024-11-28 02:45:07,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039862428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:07,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:07,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 02:45:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307128553] [2024-11-28 02:45:07,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:07,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:45:07,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:07,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:45:07,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:45:07,296 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:07,824 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-11-28 02:45:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:45:07,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-11-28 02:45:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:07,826 INFO L225 Difference]: With dead ends: 85 [2024-11-28 02:45:07,826 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 02:45:07,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:45:07,827 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 31 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:07,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 352 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:45:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 02:45:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-11-28 02:45:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2024-11-28 02:45:07,832 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 44 [2024-11-28 02:45:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:07,832 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2024-11-28 02:45:07,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2024-11-28 02:45:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 02:45:07,833 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:07,833 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:07,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:08,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:08,034 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_kobject_putErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:08,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1829958236, now seen corresponding path program 1 times [2024-11-28 02:45:08,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:08,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349003162] [2024-11-28 02:45:08,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:08,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:08,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:08,039 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:08,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:45:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:08,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:45:08,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:08,228 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 [2024-11-28 02:45:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:08,629 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:08,629 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349003162] [2024-11-28 02:45:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349003162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:08,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:08,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 02:45:08,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554225441] [2024-11-28 02:45:08,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:08,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:45:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:08,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:45:08,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:45:08,631 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:09,163 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2024-11-28 02:45:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:45:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-11-28 02:45:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:09,164 INFO L225 Difference]: With dead ends: 76 [2024-11-28 02:45:09,164 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 02:45:09,164 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:45:09,165 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 38 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:09,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 452 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:45:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 02:45:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-28 02:45:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2024-11-28 02:45:09,172 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 44 [2024-11-28 02:45:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:09,172 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2024-11-28 02:45:09,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2024-11-28 02:45:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 02:45:09,173 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:09,173 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:09,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 02:45:09,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:09,374 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:09,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash -220044717, now seen corresponding path program 1 times [2024-11-28 02:45:09,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:09,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494380845] [2024-11-28 02:45:09,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:09,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:09,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:09,376 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:09,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:45:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:09,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:45:09,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:09,670 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:09,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494380845] [2024-11-28 02:45:09,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494380845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:09,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:09,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:45:09,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141428351] [2024-11-28 02:45:09,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:09,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:45:09,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:09,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:45:09,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:45:09,671 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:09,734 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2024-11-28 02:45:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:45:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-28 02:45:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:09,735 INFO L225 Difference]: With dead ends: 78 [2024-11-28 02:45:09,735 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 02:45:09,735 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:45:09,736 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:09,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 511 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 02:45:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-28 02:45:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.180327868852459) internal successors, (72), 69 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2024-11-28 02:45:09,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 47 [2024-11-28 02:45:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:09,739 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2024-11-28 02:45:09,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2024-11-28 02:45:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 02:45:09,740 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:09,740 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:09,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:45:09,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:09,941 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:09,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 845408871, now seen corresponding path program 1 times [2024-11-28 02:45:09,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:09,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918300212] [2024-11-28 02:45:09,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:09,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:09,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:09,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:09,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:45:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:10,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:45:10,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:10,151 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 [2024-11-28 02:45:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:10,367 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:10,367 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918300212] [2024-11-28 02:45:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918300212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:10,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:10,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 02:45:10,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378944932] [2024-11-28 02:45:10,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:10,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:45:10,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:10,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:45:10,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:45:10,369 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:10,898 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2024-11-28 02:45:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:45:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2024-11-28 02:45:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:10,899 INFO L225 Difference]: With dead ends: 81 [2024-11-28 02:45:10,899 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 02:45:10,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:45:10,901 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 30 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:10,901 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 334 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:45:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 02:45:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-11-28 02:45:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 67 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-11-28 02:45:10,904 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 50 [2024-11-28 02:45:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:10,904 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-11-28 02:45:10,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-11-28 02:45:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 02:45:10,905 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:10,905 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:10,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:45:11,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:11,106 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:11,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash 845408872, now seen corresponding path program 1 times [2024-11-28 02:45:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:11,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846958590] [2024-11-28 02:45:11,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:11,108 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:11,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:45:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:11,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 02:45:11,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:11,347 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 [2024-11-28 02:45:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 02:45:11,739 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:11,739 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846958590] [2024-11-28 02:45:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846958590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:11,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:11,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 02:45:11,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843671221] [2024-11-28 02:45:11,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:11,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:45:11,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:11,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:45:11,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:45:11,741 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:12,267 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2024-11-28 02:45:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:45:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2024-11-28 02:45:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:12,270 INFO L225 Difference]: With dead ends: 73 [2024-11-28 02:45:12,270 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 02:45:12,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:45:12,271 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:12,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 424 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:45:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 02:45:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-11-28 02:45:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 65 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-11-28 02:45:12,275 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 50 [2024-11-28 02:45:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:12,276 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-11-28 02:45:12,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-11-28 02:45:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 02:45:12,278 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:12,278 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:12,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 02:45:12,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:12,482 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_kobject_putErr7ASSERT_VIOLATIONMEMORY_FREE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:12,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash -112549705, now seen corresponding path program 1 times [2024-11-28 02:45:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:12,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034489207] [2024-11-28 02:45:12,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:12,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:12,485 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:12,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:45:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:12,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:45:12,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:12,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:12,965 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:12,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034489207] [2024-11-28 02:45:12,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034489207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:12,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:45:12,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 02:45:12,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019856407] [2024-11-28 02:45:12,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:12,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:45:12,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:12,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:45:12,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:45:12,967 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:45:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:13,226 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2024-11-28 02:45:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:45:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-11-28 02:45:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:13,228 INFO L225 Difference]: With dead ends: 78 [2024-11-28 02:45:13,228 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 02:45:13,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:45:13,228 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 14 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:13,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 521 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:45:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 02:45:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-28 02:45:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 71 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2024-11-28 02:45:13,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 53 [2024-11-28 02:45:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:13,236 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2024-11-28 02:45:13,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:45:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2024-11-28 02:45:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 02:45:13,237 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:13,237 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:13,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:45:13,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:13,438 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_kobject_putErr7ASSERT_VIOLATIONMEMORY_FREE === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:13,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:13,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1029344681, now seen corresponding path program 2 times [2024-11-28 02:45:13,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:13,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743666375] [2024-11-28 02:45:13,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:13,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:13,441 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:13,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:45:13,662 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:45:13,662 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:45:13,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-28 02:45:13,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:13,683 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 [2024-11-28 02:45:13,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:45:13,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2024-11-28 02:45:14,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 02:45:14,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-11-28 02:45:14,805 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:45:14,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 10 [2024-11-28 02:45:15,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:45:15,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 41 [2024-11-28 02:45:15,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:45:15,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 38 [2024-11-28 02:45:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-28 02:45:15,823 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:45:15,823 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:15,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743666375] [2024-11-28 02:45:15,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743666375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:45:15,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:45:15,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2024-11-28 02:45:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524325321] [2024-11-28 02:45:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:45:15,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:45:15,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:15,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:45:15,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:45:15,825 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:18,859 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2024-11-28 02:45:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:45:18,860 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2024-11-28 02:45:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:18,861 INFO L225 Difference]: With dead ends: 62 [2024-11-28 02:45:18,861 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 02:45:18,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:45:18,862 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:18,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 486 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 02:45:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 02:45:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-28 02:45:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2024-11-28 02:45:18,865 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2024-11-28 02:45:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:18,865 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2024-11-28 02:45:18,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:45:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2024-11-28 02:45:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 02:45:18,866 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:18,866 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:18,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 02:45:19,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:19,067 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:19,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash -503260373, now seen corresponding path program 1 times [2024-11-28 02:45:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372563481] [2024-11-28 02:45:19,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:45:19,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:19,070 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:19,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:45:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:45:19,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:45:19,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:45:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:19,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:45:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:45:20,003 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:45:20,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372563481] [2024-11-28 02:45:20,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372563481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:45:20,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:45:20,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-28 02:45:20,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900808728] [2024-11-28 02:45:20,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:45:20,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 02:45:20,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:45:20,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 02:45:20,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:45:20,005 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:45:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:45:21,049 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2024-11-28 02:45:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:45:21,049 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2024-11-28 02:45:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:45:21,050 INFO L225 Difference]: With dead ends: 74 [2024-11-28 02:45:21,050 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 02:45:21,050 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:45:21,051 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:45:21,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 658 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:45:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 02:45:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-28 02:45:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:45:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2024-11-28 02:45:21,054 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 61 [2024-11-28 02:45:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:45:21,054 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2024-11-28 02:45:21,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 02:45:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2024-11-28 02:45:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:45:21,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:45:21,055 INFO L218 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:45:21,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 02:45:21,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:21,256 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-28 02:45:21,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:45:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 985664715, now seen corresponding path program 2 times [2024-11-28 02:45:21,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:45:21,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579193499] [2024-11-28 02:45:21,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:45:21,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:45:21,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:45:21,258 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:45:21,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd240700-5cc3-4b9b-9439-764ca48983ce/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:56:51,853 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:56:51,853 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 02:56:51,853 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.