./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_2.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_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/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_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/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_09d75617-ab5f-4cfc-9ea2-02017659d23b/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 8821dcf0dd649f568f6a7cfce8600f412ab79c37bc3c7c7e65db385cdb052111 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:09:21,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:09:21,273 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:09:21,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:09:21,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:09:21,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:09:21,324 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:09:21,324 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:09:21,325 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:09:21,325 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:09:21,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:09:21,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:09:21,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:09:21,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:09:21,327 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:09:21,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:09:21,328 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:09:21,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:09:21,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:09:21,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:09:21,328 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:09:21,329 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:09:21,330 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:09:21,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:09:21,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:09:21,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:09:21,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:09:21,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:09:21,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:09:21,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:09:21,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:09:21,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:09:21,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:09:21,332 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:09:21,332 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:09:21,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:09:21,332 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:09:21,332 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:09:21,332 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:09:21,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:09:21,332 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_09d75617-ab5f-4cfc-9ea2-02017659d23b/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 -> 8821dcf0dd649f568f6a7cfce8600f412ab79c37bc3c7c7e65db385cdb052111 [2024-11-28 03:09:21,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:09:21,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:09:21,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:09:21,679 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:09:21,679 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:09:21,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_2.i [2024-11-28 03:09:24,588 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/b306b1929/ae90844aeae546d0b2384914bf4e0089/FLAG76121a85d [2024-11-28 03:09:24,932 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:09:24,933 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/sv-benchmarks/c/ldv-memsafety/memleaks_test23_2.i [2024-11-28 03:09:24,946 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/b306b1929/ae90844aeae546d0b2384914bf4e0089/FLAG76121a85d [2024-11-28 03:09:24,960 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/b306b1929/ae90844aeae546d0b2384914bf4e0089 [2024-11-28 03:09:24,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:09:24,964 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:09:24,965 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:09:24,965 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:09:24,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:09:24,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:09:24" (1/1) ... [2024-11-28 03:09:24,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4658cce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:24, skipping insertion in model container [2024-11-28 03:09:24,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:09:24" (1/1) ... [2024-11-28 03:09:25,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:09:25,421 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 03:09:25,531 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 03:09:25,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:09:25,552 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 03:09:25,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4bd8361f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:25, skipping insertion in model container [2024-11-28 03:09:25,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:09:25,554 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-28 03:09:25,555 INFO L158 Benchmark]: Toolchain (without parser) took 590.95ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 76.7MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:09:25,556 INFO L158 Benchmark]: CDTParser took 1.60ms. Allocated memory is still 117.4MB. Free memory was 73.5MB in the beginning and 73.4MB in the end (delta: 196.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:09:25,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 588.60ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 76.7MB in the end (delta: 14.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:09:25,558 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.60ms. Allocated memory is still 117.4MB. Free memory was 73.5MB in the beginning and 73.4MB in the end (delta: 196.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 588.60ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 76.7MB in the end (delta: 14.8MB). 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_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/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_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/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_09d75617-ab5f-4cfc-9ea2-02017659d23b/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 8821dcf0dd649f568f6a7cfce8600f412ab79c37bc3c7c7e65db385cdb052111 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:09:28,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:09:28,253 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 03:09:28,260 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:09:28,260 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:09:28,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:09:28,302 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:09:28,302 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:09:28,303 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:09:28,303 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:09:28,304 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:09:28,304 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:09:28,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:09:28,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:09:28,304 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:09:28,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:09:28,305 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:09:28,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:09:28,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:09:28,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:09:28,305 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:09:28,307 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:09:28,307 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:09:28,307 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:09:28,307 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:09:28,308 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 03:09:28,308 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 03:09:28,308 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:09:28,308 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:09:28,308 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:09:28,309 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:09:28,309 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:09:28,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:09:28,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:09:28,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:09:28,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:09:28,310 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:09:28,310 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:09:28,310 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:09:28,311 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:09:28,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:09:28,311 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:09:28,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:09:28,311 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 03:09:28,312 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 03:09:28,312 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:09:28,312 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:09:28,312 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:09:28,312 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:09:28,313 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_09d75617-ab5f-4cfc-9ea2-02017659d23b/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 -> 8821dcf0dd649f568f6a7cfce8600f412ab79c37bc3c7c7e65db385cdb052111 [2024-11-28 03:09:28,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:09:28,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:09:28,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:09:28,676 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:09:28,676 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:09:28,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test23_2.i [2024-11-28 03:09:32,166 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/e7e2d5a26/703bc613c4624ae08045cfd5e9cb63b0/FLAG223fbd862 [2024-11-28 03:09:32,529 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:09:32,529 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/sv-benchmarks/c/ldv-memsafety/memleaks_test23_2.i [2024-11-28 03:09:32,551 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/e7e2d5a26/703bc613c4624ae08045cfd5e9cb63b0/FLAG223fbd862 [2024-11-28 03:09:32,577 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/data/e7e2d5a26/703bc613c4624ae08045cfd5e9cb63b0 [2024-11-28 03:09:32,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:09:32,582 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:09:32,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:09:32,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:09:32,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:09:32,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:09:32" (1/1) ... [2024-11-28 03:09:32,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653f7ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:32, skipping insertion in model container [2024-11-28 03:09:32,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:09:32" (1/1) ... [2024-11-28 03:09:32,640 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:09:32,991 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 03:09:33,094 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 03:09:33,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:09:33,124 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-28 03:09:33,145 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:09:33,187 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 03:09:33,235 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 03:09:33,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:09:33,250 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:09:33,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:09:33,375 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:09:33,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33 WrapperNode [2024-11-28 03:09:33,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:09:33,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:09:33,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:09:33,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:09:33,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,410 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,447 INFO L138 Inliner]: procedures = 175, calls = 121, calls flagged for inlining = 30, calls inlined = 15, statements flattened = 203 [2024-11-28 03:09:33,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:09:33,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:09:33,448 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:09:33,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:09:33,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,467 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,508 INFO L175 MemorySlicer]: Split 37 memory accesses to 4 slices as follows [29, 2, 1, 5]. 78 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2, 0, 0]. The 17 writes are split as follows [13, 0, 0, 4]. [2024-11-28 03:09:33,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,561 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:09:33,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:09:33,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:09:33,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:09:33,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (1/1) ... [2024-11-28 03:09:33,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:09:33,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:33,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:09:33,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:09:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 03:09:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 03:09:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-28 03:09:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-28 03:09:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2024-11-28 03:09:33,660 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2024-11-28 03:09:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2024-11-28 03:09:33,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2024-11-28 03:09:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-28 03:09:33,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-28 03:09:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:09:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:09:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure free_reports [2024-11-28 03:09:33,662 INFO L138 BoogieDeclarations]: Found implementation of procedure free_reports [2024-11-28 03:09:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:09:33,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-11-28 03:09:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:09:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 03:09:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 03:09:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 03:09:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-28 03:09:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2024-11-28 03:09:33,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2024-11-28 03:09:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2024-11-28 03:09:33,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2024-11-28 03:09:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:09:33,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:09:33,901 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:09:33,904 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:09:35,037 INFO L? ?]: Removed 247 outVars from TransFormulas that were not future-live. [2024-11-28 03:09:35,037 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:09:35,059 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:09:35,060 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 03:09:35,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:09:35 BoogieIcfgContainer [2024-11-28 03:09:35,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:09:35,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:09:35,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:09:35,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:09:35,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:09:32" (1/3) ... [2024-11-28 03:09:35,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ef3347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:09:35, skipping insertion in model container [2024-11-28 03:09:35,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:33" (2/3) ... [2024-11-28 03:09:35,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ef3347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:09:35, skipping insertion in model container [2024-11-28 03:09:35,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:09:35" (3/3) ... [2024-11-28 03:09:35,075 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test23_2.i [2024-11-28 03:09:35,091 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:09:35,093 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test23_2.i that has 7 procedures, 205 locations, 1 initial locations, 2 loop locations, and 80 error locations. [2024-11-28 03:09:35,142 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:09:35,153 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;@63e1b09d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:09:35,153 INFO L334 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2024-11-28 03:09:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 110 states have (on average 1.8545454545454545) internal successors, (204), 190 states have internal predecessors, (204), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 03:09:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:09:35,164 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:35,165 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:35,166 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:35,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1957570517, now seen corresponding path program 1 times [2024-11-28 03:09:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:35,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399103370] [2024-11-28 03:09:35,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:35,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:35,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:35,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:09:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:35,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:09:35,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:35,414 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 03:09:35,504 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 03:09:35,505 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:35,505 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399103370] [2024-11-28 03:09:35,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399103370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:35,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:35,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:09:35,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163437047] [2024-11-28 03:09:35,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:35,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:09:35,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:35,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:09:35,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:09:35,540 INFO L87 Difference]: Start difference. First operand has 205 states, 110 states have (on average 1.8545454545454545) internal successors, (204), 190 states have internal predecessors, (204), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 03:09:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:36,528 INFO L93 Difference]: Finished difference Result 221 states and 236 transitions. [2024-11-28 03:09:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:09:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 12 [2024-11-28 03:09:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:36,541 INFO L225 Difference]: With dead ends: 221 [2024-11-28 03:09:36,541 INFO L226 Difference]: Without dead ends: 219 [2024-11-28 03:09:36,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 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 03:09:36,547 INFO L435 NwaCegarLoop]: 205 mSDtfsCounter, 10 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:36,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 832 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:09:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-28 03:09:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2024-11-28 03:09:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 116 states have (on average 1.8017241379310345) internal successors, (209), 195 states have internal predecessors, (209), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-28 03:09:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 228 transitions. [2024-11-28 03:09:36,614 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 228 transitions. Word has length 12 [2024-11-28 03:09:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:36,615 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 228 transitions. [2024-11-28 03:09:36,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 03:09:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 228 transitions. [2024-11-28 03:09:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:09:36,616 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:36,616 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:36,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:09:36,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:36,817 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:36,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1957570518, now seen corresponding path program 1 times [2024-11-28 03:09:36,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473040686] [2024-11-28 03:09:36,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:36,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:36,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:36,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:36,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:09:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:36,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:09:36,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:36,964 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 03:09:37,154 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 03:09:37,154 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:37,154 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:37,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473040686] [2024-11-28 03:09:37,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473040686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:37,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:37,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:09:37,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137725297] [2024-11-28 03:09:37,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:37,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:09:37,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:37,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:09:37,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:09:37,157 INFO L87 Difference]: Start difference. First operand 212 states and 228 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 03:09:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:38,220 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2024-11-28 03:09:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:09:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 12 [2024-11-28 03:09:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:38,222 INFO L225 Difference]: With dead ends: 216 [2024-11-28 03:09:38,225 INFO L226 Difference]: Without dead ends: 216 [2024-11-28 03:09:38,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:09:38,226 INFO L435 NwaCegarLoop]: 204 mSDtfsCounter, 10 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:38,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1095 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 03:09:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-28 03:09:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2024-11-28 03:09:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 116 states have (on average 1.7844827586206897) internal successors, (207), 195 states have internal predecessors, (207), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-28 03:09:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 226 transitions. [2024-11-28 03:09:38,244 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 226 transitions. Word has length 12 [2024-11-28 03:09:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:38,244 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 226 transitions. [2024-11-28 03:09:38,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 03:09:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 226 transitions. [2024-11-28 03:09:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:09:38,245 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:38,245 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:38,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:09:38,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:38,445 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:38,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -594586444, now seen corresponding path program 1 times [2024-11-28 03:09:38,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633835355] [2024-11-28 03:09:38,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:38,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:38,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:38,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:38,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:09:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:38,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:09:38,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:38,599 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 03:09:38,599 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:38,599 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:38,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633835355] [2024-11-28 03:09:38,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633835355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:38,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:38,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:38,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64148026] [2024-11-28 03:09:38,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:38,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:09:38,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:38,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:09:38,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:09:38,601 INFO L87 Difference]: Start difference. First operand 212 states and 226 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 03:09:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:38,652 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2024-11-28 03:09:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:09:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2024-11-28 03:09:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:38,654 INFO L225 Difference]: With dead ends: 203 [2024-11-28 03:09:38,654 INFO L226 Difference]: Without dead ends: 203 [2024-11-28 03:09:38,654 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 03:09:38,655 INFO L435 NwaCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:38,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 837 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:09:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-28 03:09:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-11-28 03:09:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 112 states have (on average 1.7767857142857142) internal successors, (199), 187 states have internal predecessors, (199), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-28 03:09:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 216 transitions. [2024-11-28 03:09:38,677 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 216 transitions. Word has length 12 [2024-11-28 03:09:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:38,677 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 216 transitions. [2024-11-28 03:09:38,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 03:09:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 216 transitions. [2024-11-28 03:09:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:09:38,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:38,678 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:38,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:09:38,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:38,879 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:38,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:38,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1957484629, now seen corresponding path program 1 times [2024-11-28 03:09:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:38,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146229365] [2024-11-28 03:09:38,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:38,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:38,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:38,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:09:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:38,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:09:38,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:39,005 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 03:09:39,006 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:39,006 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:39,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146229365] [2024-11-28 03:09:39,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146229365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:39,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:39,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:39,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470182279] [2024-11-28 03:09:39,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:39,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:09:39,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:39,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:09:39,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:09:39,007 INFO L87 Difference]: Start difference. First operand 203 states and 216 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 03:09:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:39,058 INFO L93 Difference]: Finished difference Result 204 states and 216 transitions. [2024-11-28 03:09:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:09:39,059 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 03:09:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:39,060 INFO L225 Difference]: With dead ends: 204 [2024-11-28 03:09:39,060 INFO L226 Difference]: Without dead ends: 204 [2024-11-28 03:09:39,060 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 03:09:39,061 INFO L435 NwaCegarLoop]: 206 mSDtfsCounter, 106 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:39,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 707 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:09:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-28 03:09:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2024-11-28 03:09:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 112 states have (on average 1.7678571428571428) internal successors, (198), 187 states have internal predecessors, (198), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-28 03:09:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 215 transitions. [2024-11-28 03:09:39,071 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 215 transitions. Word has length 12 [2024-11-28 03:09:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:39,071 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 215 transitions. [2024-11-28 03:09:39,071 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 03:09:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 215 transitions. [2024-11-28 03:09:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:09:39,072 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:39,072 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:39,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:09:39,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:39,272 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:39,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:39,273 INFO L85 PathProgramCache]: Analyzing trace with hash -594672332, now seen corresponding path program 1 times [2024-11-28 03:09:39,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:39,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362244910] [2024-11-28 03:09:39,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:39,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:39,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:39,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:39,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:09:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:39,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:09:39,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:39,406 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 03:09:39,406 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:39,406 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362244910] [2024-11-28 03:09:39,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362244910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:39,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:39,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:39,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009981836] [2024-11-28 03:09:39,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:39,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:09:39,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:39,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:09:39,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:09:39,407 INFO L87 Difference]: Start difference. First operand 203 states and 215 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 03:09:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:39,444 INFO L93 Difference]: Finished difference Result 205 states and 217 transitions. [2024-11-28 03:09:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:09:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 03:09:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:39,446 INFO L225 Difference]: With dead ends: 205 [2024-11-28 03:09:39,446 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 03:09:39,446 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 03:09:39,449 INFO L435 NwaCegarLoop]: 209 mSDtfsCounter, 100 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:39,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 718 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:09:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 03:09:39,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-28 03:09:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 114 states have (on average 1.7543859649122806) internal successors, (200), 189 states have internal predecessors, (200), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-28 03:09:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 217 transitions. [2024-11-28 03:09:39,467 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 217 transitions. Word has length 12 [2024-11-28 03:09:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:39,467 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 217 transitions. [2024-11-28 03:09:39,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 03:09:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 217 transitions. [2024-11-28 03:09:39,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-28 03:09:39,468 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:39,468 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:39,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:09:39,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:39,668 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:39,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1254952995, now seen corresponding path program 1 times [2024-11-28 03:09:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523904104] [2024-11-28 03:09:39,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:39,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:39,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:39,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:09:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:39,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:09:39,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:39,794 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 03:09:39,795 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:39,795 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:39,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523904104] [2024-11-28 03:09:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523904104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:39,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:39,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:09:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66655583] [2024-11-28 03:09:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:39,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:09:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:39,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:09:39,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:09:39,796 INFO L87 Difference]: Start difference. First operand 205 states and 217 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:09:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:40,292 INFO L93 Difference]: Finished difference Result 217 states and 231 transitions. [2024-11-28 03:09:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:09:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-28 03:09:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:40,293 INFO L225 Difference]: With dead ends: 217 [2024-11-28 03:09:40,293 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 03:09:40,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 03:09:40,294 INFO L435 NwaCegarLoop]: 171 mSDtfsCounter, 51 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:40,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 378 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:09:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 03:09:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2024-11-28 03:09:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 109 states have (on average 1.7798165137614679) internal successors, (194), 184 states have internal predecessors, (194), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 03:09:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 210 transitions. [2024-11-28 03:09:40,301 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 210 transitions. Word has length 13 [2024-11-28 03:09:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:40,301 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 210 transitions. [2024-11-28 03:09:40,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:09:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 210 transitions. [2024-11-28 03:09:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:09:40,302 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:40,302 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:40,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:09:40,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:40,503 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:40,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1626889668, now seen corresponding path program 1 times [2024-11-28 03:09:40,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:40,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057531092] [2024-11-28 03:09:40,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:40,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:40,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:09:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:40,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:09:40,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:40,746 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:09:40,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:09:40,820 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 03:09:40,820 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:40,820 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:40,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057531092] [2024-11-28 03:09:40,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057531092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:40,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:40,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:40,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966372030] [2024-11-28 03:09:40,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:40,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:09:40,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:40,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:09:40,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:09:40,822 INFO L87 Difference]: Start difference. First operand 199 states and 210 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:09:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:42,127 INFO L93 Difference]: Finished difference Result 250 states and 264 transitions. [2024-11-28 03:09:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:09:42,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-11-28 03:09:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:42,129 INFO L225 Difference]: With dead ends: 250 [2024-11-28 03:09:42,130 INFO L226 Difference]: Without dead ends: 250 [2024-11-28 03:09:42,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:09:42,131 INFO L435 NwaCegarLoop]: 132 mSDtfsCounter, 210 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:42,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 517 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:09:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-28 03:09:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 209. [2024-11-28 03:09:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 118 states have (on average 1.7627118644067796) internal successors, (208), 193 states have internal predecessors, (208), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-28 03:09:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2024-11-28 03:09:42,138 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 16 [2024-11-28 03:09:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:42,138 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2024-11-28 03:09:42,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:09:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2024-11-28 03:09:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:09:42,139 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:42,139 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:42,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:09:42,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:42,340 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:42,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1626889667, now seen corresponding path program 1 times [2024-11-28 03:09:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:42,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139022419] [2024-11-28 03:09:42,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:42,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:42,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:09:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:42,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:09:42,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:42,589 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 03:09:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:09:42,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:09:42,740 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 03:09:42,741 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:42,741 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139022419] [2024-11-28 03:09:42,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139022419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:42,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:42,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:09:42,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842903743] [2024-11-28 03:09:42,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:42,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:09:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:42,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:09:42,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=28, Unknown=1, NotChecked=10, Total=56 [2024-11-28 03:09:42,743 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:09:43,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:43,912 INFO L93 Difference]: Finished difference Result 249 states and 263 transitions. [2024-11-28 03:09:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:09:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-11-28 03:09:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:43,914 INFO L225 Difference]: With dead ends: 249 [2024-11-28 03:09:43,914 INFO L226 Difference]: Without dead ends: 249 [2024-11-28 03:09:43,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=76, Unknown=1, NotChecked=18, Total=132 [2024-11-28 03:09:43,915 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 301 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:43,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 244 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 476 Invalid, 0 Unknown, 261 Unchecked, 1.0s Time] [2024-11-28 03:09:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-28 03:09:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 208. [2024-11-28 03:09:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 118 states have (on average 1.7542372881355932) internal successors, (207), 192 states have internal predecessors, (207), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-28 03:09:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2024-11-28 03:09:43,922 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 16 [2024-11-28 03:09:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:43,922 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2024-11-28 03:09:43,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:09:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2024-11-28 03:09:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 03:09:43,923 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:43,923 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, 1, 1, 1, 1] [2024-11-28 03:09:43,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:09:44,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:44,127 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:44,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash -760082621, now seen corresponding path program 1 times [2024-11-28 03:09:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:44,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781401973] [2024-11-28 03:09:44,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:44,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:44,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:44,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:44,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:09:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:44,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:09:44,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:44,273 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 03:09:44,318 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 03:09:44,319 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:44,319 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:44,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781401973] [2024-11-28 03:09:44,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781401973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:44,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:44,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:44,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722909526] [2024-11-28 03:09:44,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:44,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:09:44,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:44,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:09:44,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:44,320 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:45,089 INFO L93 Difference]: Finished difference Result 265 states and 290 transitions. [2024-11-28 03:09:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:09:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-11-28 03:09:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:45,091 INFO L225 Difference]: With dead ends: 265 [2024-11-28 03:09:45,091 INFO L226 Difference]: Without dead ends: 265 [2024-11-28 03:09:45,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:45,092 INFO L435 NwaCegarLoop]: 170 mSDtfsCounter, 67 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:45,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 631 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:09:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-28 03:09:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 237. [2024-11-28 03:09:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 221 states have internal predecessors, (264), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-28 03:09:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2024-11-28 03:09:45,100 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 25 [2024-11-28 03:09:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:45,101 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2024-11-28 03:09:45,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2024-11-28 03:09:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 03:09:45,101 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:45,101 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, 1, 1, 1, 1] [2024-11-28 03:09:45,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:09:45,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:45,302 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:45,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash -760082620, now seen corresponding path program 1 times [2024-11-28 03:09:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:45,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800957156] [2024-11-28 03:09:45,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:45,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:45,304 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:45,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:09:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:45,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:09:45,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:45,456 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 03:09:45,548 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 03:09:45,548 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:45,548 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800957156] [2024-11-28 03:09:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800957156] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:45,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:45,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:45,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603137504] [2024-11-28 03:09:45,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:45,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:09:45,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:45,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:09:45,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:45,550 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:46,424 INFO L93 Difference]: Finished difference Result 263 states and 288 transitions. [2024-11-28 03:09:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:09:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-11-28 03:09:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:46,426 INFO L225 Difference]: With dead ends: 263 [2024-11-28 03:09:46,427 INFO L226 Difference]: Without dead ends: 263 [2024-11-28 03:09:46,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:46,428 INFO L435 NwaCegarLoop]: 169 mSDtfsCounter, 64 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:46,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 666 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:09:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-28 03:09:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 238. [2024-11-28 03:09:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.7549668874172186) internal successors, (265), 221 states have internal predecessors, (265), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 286 transitions. [2024-11-28 03:09:46,437 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 286 transitions. Word has length 25 [2024-11-28 03:09:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:46,437 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 286 transitions. [2024-11-28 03:09:46,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 286 transitions. [2024-11-28 03:09:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 03:09:46,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:46,438 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, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:46,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:09:46,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:46,639 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:46,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash -294888472, now seen corresponding path program 1 times [2024-11-28 03:09:46,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:46,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43014278] [2024-11-28 03:09:46,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:46,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:46,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:46,641 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:46,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:09:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:46,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:09:46,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:46,829 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 03:09:46,829 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:46,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43014278] [2024-11-28 03:09:46,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43014278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:46,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:46,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:09:46,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435443452] [2024-11-28 03:09:46,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:46,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:09:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:46,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:09:46,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:09:46,832 INFO L87 Difference]: Start difference. First operand 238 states and 286 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:46,862 INFO L93 Difference]: Finished difference Result 238 states and 286 transitions. [2024-11-28 03:09:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:09:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-28 03:09:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:46,864 INFO L225 Difference]: With dead ends: 238 [2024-11-28 03:09:46,865 INFO L226 Difference]: Without dead ends: 238 [2024-11-28 03:09:46,865 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 03:09:46,865 INFO L435 NwaCegarLoop]: 199 mSDtfsCounter, 90 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:46,866 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 689 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:09:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-28 03:09:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2024-11-28 03:09:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 151 states have (on average 1.7483443708609272) internal successors, (264), 220 states have internal predecessors, (264), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 285 transitions. [2024-11-28 03:09:46,874 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 285 transitions. Word has length 27 [2024-11-28 03:09:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:46,874 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 285 transitions. [2024-11-28 03:09:46,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 285 transitions. [2024-11-28 03:09:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 03:09:46,875 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:46,875 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:46,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:09:47,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:47,078 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:47,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash -551607768, now seen corresponding path program 1 times [2024-11-28 03:09:47,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:47,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987122883] [2024-11-28 03:09:47,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:47,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:47,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:47,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:47,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:09:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:47,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:09:47,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:47,241 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 03:09:47,242 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:47,242 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987122883] [2024-11-28 03:09:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987122883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:47,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:47,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:09:47,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564436079] [2024-11-28 03:09:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:47,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:09:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:47,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:09:47,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:47,247 INFO L87 Difference]: Start difference. First operand 237 states and 285 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:47,360 INFO L93 Difference]: Finished difference Result 237 states and 284 transitions. [2024-11-28 03:09:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:09:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-11-28 03:09:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:47,363 INFO L225 Difference]: With dead ends: 237 [2024-11-28 03:09:47,363 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 03:09:47,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:47,364 INFO L435 NwaCegarLoop]: 188 mSDtfsCounter, 83 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:47,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 853 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:09:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 03:09:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2024-11-28 03:09:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 151 states have (on average 1.7417218543046358) internal successors, (263), 220 states have internal predecessors, (263), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 284 transitions. [2024-11-28 03:09:47,372 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 284 transitions. Word has length 28 [2024-11-28 03:09:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:47,372 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 284 transitions. [2024-11-28 03:09:47,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 284 transitions. [2024-11-28 03:09:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 03:09:47,373 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:47,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:47,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:09:47,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:47,577 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:47,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1782325682, now seen corresponding path program 1 times [2024-11-28 03:09:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:47,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728804439] [2024-11-28 03:09:47,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:47,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:47,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:47,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:47,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:09:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:47,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:09:47,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:47,727 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 03:09:47,750 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2024-11-28 03:09:47,773 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-28 03:09:47,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-28 03:09:47,830 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 03:09:47,830 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:47,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:47,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728804439] [2024-11-28 03:09:47,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728804439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:47,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:47,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626064732] [2024-11-28 03:09:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:47,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:09:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:47,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:09:47,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2024-11-28 03:09:47,831 INFO L87 Difference]: Start difference. First operand 237 states and 284 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:48,523 INFO L93 Difference]: Finished difference Result 281 states and 330 transitions. [2024-11-28 03:09:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:09:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-28 03:09:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:48,525 INFO L225 Difference]: With dead ends: 281 [2024-11-28 03:09:48,525 INFO L226 Difference]: Without dead ends: 281 [2024-11-28 03:09:48,525 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2024-11-28 03:09:48,526 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 127 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:48,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 369 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 330 Invalid, 0 Unknown, 266 Unchecked, 0.7s Time] [2024-11-28 03:09:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-11-28 03:09:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 251. [2024-11-28 03:09:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 168 states have (on average 1.6666666666666667) internal successors, (280), 234 states have internal predecessors, (280), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 301 transitions. [2024-11-28 03:09:48,540 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 301 transitions. Word has length 33 [2024-11-28 03:09:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:48,542 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 301 transitions. [2024-11-28 03:09:48,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 301 transitions. [2024-11-28 03:09:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 03:09:48,543 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:48,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:48,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:09:48,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:48,744 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:48,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1782325681, now seen corresponding path program 1 times [2024-11-28 03:09:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:48,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657722491] [2024-11-28 03:09:48,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:48,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:48,748 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:48,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:09:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:48,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:09:48,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:48,923 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 03:09:48,953 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_zalloc_#t~malloc13#1.base| |c_ldv_zalloc_#in~size#1|) |c_#length|)) is different from true [2024-11-28 03:09:48,987 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-28 03:09:48,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2024-11-28 03:09:49,258 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 03:09:49,258 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:49,258 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:49,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657722491] [2024-11-28 03:09:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657722491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:49,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:09:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114134323] [2024-11-28 03:09:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:49,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:09:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:49,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:09:49,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=22, Unknown=1, NotChecked=8, Total=42 [2024-11-28 03:09:49,261 INFO L87 Difference]: Start difference. First operand 251 states and 301 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:50,517 INFO L93 Difference]: Finished difference Result 274 states and 305 transitions. [2024-11-28 03:09:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:09:50,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-28 03:09:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:50,519 INFO L225 Difference]: With dead ends: 274 [2024-11-28 03:09:50,519 INFO L226 Difference]: Without dead ends: 274 [2024-11-28 03:09:50,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2024-11-28 03:09:50,520 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 123 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:50,520 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 439 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 462 Invalid, 0 Unknown, 281 Unchecked, 1.2s Time] [2024-11-28 03:09:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-28 03:09:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 251. [2024-11-28 03:09:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 168 states have (on average 1.6488095238095237) internal successors, (277), 234 states have internal predecessors, (277), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 298 transitions. [2024-11-28 03:09:50,528 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 298 transitions. Word has length 33 [2024-11-28 03:09:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:50,528 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 298 transitions. [2024-11-28 03:09:50,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 298 transitions. [2024-11-28 03:09:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 03:09:50,529 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:50,529 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:50,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:09:50,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:50,734 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:50,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:50,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1415064696, now seen corresponding path program 1 times [2024-11-28 03:09:50,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:50,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110903954] [2024-11-28 03:09:50,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:50,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:50,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:50,738 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:50,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:09:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:50,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:09:50,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:50,929 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 03:09:50,931 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:50,931 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:50,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110903954] [2024-11-28 03:09:50,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110903954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:50,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:50,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:09:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892991865] [2024-11-28 03:09:50,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:50,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:09:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:50,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:09:50,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:09:50,933 INFO L87 Difference]: Start difference. First operand 251 states and 298 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:50,955 INFO L93 Difference]: Finished difference Result 257 states and 304 transitions. [2024-11-28 03:09:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:09:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-28 03:09:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:50,956 INFO L225 Difference]: With dead ends: 257 [2024-11-28 03:09:50,956 INFO L226 Difference]: Without dead ends: 257 [2024-11-28 03:09:50,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 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 03:09:50,957 INFO L435 NwaCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:50,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 585 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:09:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-28 03:09:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2024-11-28 03:09:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 172 states have (on average 1.6337209302325582) internal successors, (281), 238 states have internal predecessors, (281), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 302 transitions. [2024-11-28 03:09:50,967 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 302 transitions. Word has length 36 [2024-11-28 03:09:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:50,967 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 302 transitions. [2024-11-28 03:09:50,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 302 transitions. [2024-11-28 03:09:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 03:09:50,969 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:50,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:50,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:09:51,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:51,170 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:51,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1415068631, now seen corresponding path program 1 times [2024-11-28 03:09:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:51,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226260746] [2024-11-28 03:09:51,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:51,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:51,172 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:51,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:09:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:51,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:09:51,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:51,397 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 03:09:51,397 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:51,397 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226260746] [2024-11-28 03:09:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226260746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:51,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:51,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:09:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040827196] [2024-11-28 03:09:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:51,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:09:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:51,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:09:51,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:51,398 INFO L87 Difference]: Start difference. First operand 255 states and 302 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:51,610 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2024-11-28 03:09:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:09:51,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-28 03:09:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:51,612 INFO L225 Difference]: With dead ends: 253 [2024-11-28 03:09:51,612 INFO L226 Difference]: Without dead ends: 253 [2024-11-28 03:09:51,613 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:09:51,613 INFO L435 NwaCegarLoop]: 184 mSDtfsCounter, 68 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:51,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 779 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:09:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-28 03:09:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2024-11-28 03:09:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 172 states have (on average 1.6162790697674418) internal successors, (278), 236 states have internal predecessors, (278), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 299 transitions. [2024-11-28 03:09:51,621 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 299 transitions. Word has length 36 [2024-11-28 03:09:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:51,622 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 299 transitions. [2024-11-28 03:09:51,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 299 transitions. [2024-11-28 03:09:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 03:09:51,622 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:51,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:51,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:09:51,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:51,823 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:51,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash 958364881, now seen corresponding path program 1 times [2024-11-28 03:09:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:51,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245003649] [2024-11-28 03:09:51,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:51,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:51,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:51,826 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:51,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:09:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:52,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:09:52,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:52,029 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 03:09:52,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:09:52,080 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base|)) (= |c_#length| (store |c_old(#length)| |ldv_zalloc_#t~malloc13#1.base| (select |c_#length| |ldv_zalloc_#t~malloc13#1.base|))))) is different from true [2024-11-28 03:09:52,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:09:52,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:09:52,126 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 03:09:52,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 03:09:52,236 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 03:09:52,236 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:52,236 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:52,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245003649] [2024-11-28 03:09:52,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245003649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:52,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:52,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:09:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387236263] [2024-11-28 03:09:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:52,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:09:52,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:52,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:09:52,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=21, Unknown=1, NotChecked=8, Total=42 [2024-11-28 03:09:52,237 INFO L87 Difference]: Start difference. First operand 253 states and 299 transitions. Second operand has 7 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:53,250 INFO L93 Difference]: Finished difference Result 300 states and 334 transitions. [2024-11-28 03:09:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:09:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-28 03:09:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:53,252 INFO L225 Difference]: With dead ends: 300 [2024-11-28 03:09:53,252 INFO L226 Difference]: Without dead ends: 300 [2024-11-28 03:09:53,252 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=37, Unknown=1, NotChecked=12, Total=72 [2024-11-28 03:09:53,253 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 164 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:53,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 367 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 421 Invalid, 0 Unknown, 311 Unchecked, 0.9s Time] [2024-11-28 03:09:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-28 03:09:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 253. [2024-11-28 03:09:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 172 states have (on average 1.6046511627906976) internal successors, (276), 236 states have internal predecessors, (276), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 297 transitions. [2024-11-28 03:09:53,263 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 297 transitions. Word has length 37 [2024-11-28 03:09:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:53,263 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 297 transitions. [2024-11-28 03:09:53,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 297 transitions. [2024-11-28 03:09:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 03:09:53,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:53,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:53,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:09:53,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:53,468 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:53,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash -844723001, now seen corresponding path program 1 times [2024-11-28 03:09:53,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:53,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634286443] [2024-11-28 03:09:53,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:53,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:53,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:53,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:53,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:09:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:53,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:09:53,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:53,671 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 03:09:53,671 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:53,671 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:53,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634286443] [2024-11-28 03:09:53,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634286443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:53,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:53,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:09:53,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761841973] [2024-11-28 03:09:53,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:53,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:09:53,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:53,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:09:53,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:09:53,673 INFO L87 Difference]: Start difference. First operand 253 states and 297 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:53,696 INFO L93 Difference]: Finished difference Result 255 states and 299 transitions. [2024-11-28 03:09:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:09:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-28 03:09:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:53,697 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:09:53,698 INFO L226 Difference]: Without dead ends: 255 [2024-11-28 03:09:53,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 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 03:09:53,698 INFO L435 NwaCegarLoop]: 195 mSDtfsCounter, 0 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:53,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 578 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:09:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-28 03:09:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2024-11-28 03:09:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 174 states have (on average 1.5977011494252873) internal successors, (278), 238 states have internal predecessors, (278), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 299 transitions. [2024-11-28 03:09:53,706 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 299 transitions. Word has length 41 [2024-11-28 03:09:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:53,706 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 299 transitions. [2024-11-28 03:09:53,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:09:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 299 transitions. [2024-11-28 03:09:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 03:09:53,707 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:53,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:53,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 03:09:53,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:53,908 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:53,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:53,908 INFO L85 PathProgramCache]: Analyzing trace with hash -416543408, now seen corresponding path program 1 times [2024-11-28 03:09:53,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:53,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441026288] [2024-11-28 03:09:53,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:53,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:53,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:53,912 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:53,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:09:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:54,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:09:54,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:54,145 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:09:54,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:09:54,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 03:09:54,250 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:09:54,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:09:54,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 03:09:54,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-28 03:09:54,530 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 03:09:54,530 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:09:54,530 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:09:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441026288] [2024-11-28 03:09:54,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441026288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:09:54,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:09:54,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 03:09:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434822244] [2024-11-28 03:09:54,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:09:54,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:09:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:09:54,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:09:54,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:09:54,532 INFO L87 Difference]: Start difference. First operand 255 states and 299 transitions. Second operand has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:09:56,046 INFO L93 Difference]: Finished difference Result 330 states and 379 transitions. [2024-11-28 03:09:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:09:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-11-28 03:09:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:09:56,048 INFO L225 Difference]: With dead ends: 330 [2024-11-28 03:09:56,049 INFO L226 Difference]: Without dead ends: 330 [2024-11-28 03:09:56,049 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:09:56,049 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 303 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:09:56,050 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 679 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:09:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-28 03:09:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 266. [2024-11-28 03:09:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 185 states have (on average 1.5945945945945945) internal successors, (295), 246 states have internal predecessors, (295), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:09:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2024-11-28 03:09:56,058 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 42 [2024-11-28 03:09:56,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:09:56,058 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2024-11-28 03:09:56,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:09:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2024-11-28 03:09:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 03:09:56,059 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:09:56,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:09:56,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:09:56,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:56,263 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:09:56,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:09:56,264 INFO L85 PathProgramCache]: Analyzing trace with hash -416543407, now seen corresponding path program 1 times [2024-11-28 03:09:56,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:09:56,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930462943] [2024-11-28 03:09:56,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:09:56,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:09:56,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:09:56,267 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:09:56,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:09:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:09:56,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:09:56,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:09:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:09:56,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:09:56,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:09:56,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:10:04,921 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 03:10:04,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-28 03:10:05,138 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 03:10:05,138 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:10:05,138 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:10:05,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930462943] [2024-11-28 03:10:05,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930462943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:05,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:05,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:10:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008298913] [2024-11-28 03:10:05,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:05,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:10:05,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:10:05,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:10:05,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=79, Unknown=6, NotChecked=0, Total=110 [2024-11-28 03:10:05,140 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:10:09,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:13,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:17,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:23,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:27,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:32,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:37,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:41,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:46,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:50,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:55,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:59,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:10:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:59,816 INFO L93 Difference]: Finished difference Result 290 states and 336 transitions. [2024-11-28 03:10:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:10:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2024-11-28 03:10:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:59,818 INFO L225 Difference]: With dead ends: 290 [2024-11-28 03:10:59,818 INFO L226 Difference]: Without dead ends: 290 [2024-11-28 03:10:59,818 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=85, Invalid=287, Unknown=8, NotChecked=0, Total=380 [2024-11-28 03:10:59,818 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 486 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 71 mSolverCounterUnsat, 120 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 120 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:59,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 400 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 828 Invalid, 120 Unknown, 0 Unchecked, 54.0s Time] [2024-11-28 03:10:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-28 03:10:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 264. [2024-11-28 03:10:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 185 states have (on average 1.572972972972973) internal successors, (291), 244 states have internal predecessors, (291), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:10:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 312 transitions. [2024-11-28 03:10:59,826 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 312 transitions. Word has length 42 [2024-11-28 03:10:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:59,827 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 312 transitions. [2024-11-28 03:10:59,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:10:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 312 transitions. [2024-11-28 03:10:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 03:10:59,827 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:59,827 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, 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 03:10:59,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:00,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:00,028 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_LEAK === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:11:00,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash -27923647, now seen corresponding path program 1 times [2024-11-28 03:11:00,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:11:00,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814703206] [2024-11-28 03:11:00,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:00,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:00,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:00,031 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:00,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:11:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:00,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:11:00,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:00,284 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 03:11:00,284 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:11:00,284 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:11:00,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814703206] [2024-11-28 03:11:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814703206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:00,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363983161] [2024-11-28 03:11:00,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:00,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:11:00,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:00,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:00,285 INFO L87 Difference]: Start difference. First operand 264 states and 312 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:11:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:00,326 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2024-11-28 03:11:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-28 03:11:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:00,328 INFO L225 Difference]: With dead ends: 266 [2024-11-28 03:11:00,328 INFO L226 Difference]: Without dead ends: 266 [2024-11-28 03:11:00,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 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 03:11:00,328 INFO L435 NwaCegarLoop]: 193 mSDtfsCounter, 0 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:00,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 573 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-28 03:11:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2024-11-28 03:11:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 187 states have (on average 1.5614973262032086) internal successors, (292), 246 states have internal predecessors, (292), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:11:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 313 transitions. [2024-11-28 03:11:00,336 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 313 transitions. Word has length 43 [2024-11-28 03:11:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:00,336 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 313 transitions. [2024-11-28 03:11:00,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:11:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 313 transitions. [2024-11-28 03:11:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 03:11:00,337 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:00,337 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, 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 03:11:00,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:11:00,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:00,537 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:11:00,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1083900683, now seen corresponding path program 1 times [2024-11-28 03:11:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:11:00,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515912999] [2024-11-28 03:11:00,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:00,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:00,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:00,540 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:00,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:11:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:00,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 03:11:00,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:00,782 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 03:11:01,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 03:11:01,337 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-28 03:11:01,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 44 [2024-11-28 03:11:01,461 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 03:11:01,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 03:11:01,862 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-28 03:11:01,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 44 [2024-11-28 03:11:02,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2024-11-28 03:11:02,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2024-11-28 03:11:03,126 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 03:11:03,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2024-11-28 03:11:03,195 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 03:11:03,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2024-11-28 03:11:03,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 03:11:03,752 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 03:11:03,752 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:11:03,752 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:11:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515912999] [2024-11-28 03:11:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515912999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:03,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:03,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-28 03:11:03,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711933035] [2024-11-28 03:11:03,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:03,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:11:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:11:03,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:11:03,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:11:03,754 INFO L87 Difference]: Start difference. First operand 266 states and 313 transitions. Second operand has 18 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:11:11,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:11,406 INFO L93 Difference]: Finished difference Result 419 states and 486 transitions. [2024-11-28 03:11:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:11:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2024-11-28 03:11:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:11,413 INFO L225 Difference]: With dead ends: 419 [2024-11-28 03:11:11,413 INFO L226 Difference]: Without dead ends: 419 [2024-11-28 03:11:11,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:11:11,419 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 451 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:11,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 957 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-28 03:11:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2024-11-28 03:11:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2024-11-28 03:11:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 262 states have (on average 1.5725190839694656) internal successors, (412), 323 states have internal predecessors, (412), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-28 03:11:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 441 transitions. [2024-11-28 03:11:11,433 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 441 transitions. Word has length 45 [2024-11-28 03:11:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:11,433 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 441 transitions. [2024-11-28 03:11:11,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:11:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 441 transitions. [2024-11-28 03:11:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 03:11:11,434 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:11,434 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, 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 03:11:11,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:11,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:11,635 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:11:11,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1083900682, now seen corresponding path program 1 times [2024-11-28 03:11:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:11:11,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859754825] [2024-11-28 03:11:11,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:11,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:11,638 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:11,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:11:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:11,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 03:11:11,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:11,970 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 03:11:11,986 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 03:11:12,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:11:12,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 03:11:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:12,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 03:11:12,940 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-28 03:11:12,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 44 [2024-11-28 03:11:13,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-28 03:11:13,039 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 03:11:13,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 03:11:13,472 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-28 03:11:13,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-28 03:11:13,578 INFO L349 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2024-11-28 03:11:13,578 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 26 [2024-11-28 03:11:13,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-28 03:11:13,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:11:14,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-28 03:11:14,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:11:14,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 03:11:14,959 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 03:11:14,959 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:11:14,960 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:11:14,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859754825] [2024-11-28 03:11:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859754825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2024-11-28 03:11:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403208634] [2024-11-28 03:11:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:14,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:11:14,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:11:14,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:11:14,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:11:14,961 INFO L87 Difference]: Start difference. First operand 347 states and 441 transitions. Second operand has 19 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:11:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:27,346 INFO L93 Difference]: Finished difference Result 496 states and 562 transitions. [2024-11-28 03:11:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:11:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2024-11-28 03:11:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:27,348 INFO L225 Difference]: With dead ends: 496 [2024-11-28 03:11:27,348 INFO L226 Difference]: Without dead ends: 496 [2024-11-28 03:11:27,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:11:27,350 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 538 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:27,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1045 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2024-11-28 03:11:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2024-11-28 03:11:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 379. [2024-11-28 03:11:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 290 states have (on average 1.5724137931034483) internal successors, (456), 352 states have internal predecessors, (456), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-28 03:11:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 490 transitions. [2024-11-28 03:11:27,364 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 490 transitions. Word has length 45 [2024-11-28 03:11:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:27,365 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 490 transitions. [2024-11-28 03:11:27,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:11:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 490 transitions. [2024-11-28 03:11:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 03:11:27,366 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:27,366 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, 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 03:11:27,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:27,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:27,566 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:11:27,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -690210554, now seen corresponding path program 1 times [2024-11-28 03:11:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:11:27,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400446043] [2024-11-28 03:11:27,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:27,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:27,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:27,569 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:27,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:11:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:27,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:11:27,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:28,173 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:11:28,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:11:28,412 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:11:28,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:11:28,656 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:11:28,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:11:29,020 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 03:11:29,020 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:11:29,020 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:11:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400446043] [2024-11-28 03:11:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400446043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:11:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670954292] [2024-11-28 03:11:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:29,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:11:29,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:29,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:29,021 INFO L87 Difference]: Start difference. First operand 379 states and 490 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:11:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:30,923 INFO L93 Difference]: Finished difference Result 408 states and 511 transitions. [2024-11-28 03:11:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:11:30,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-28 03:11:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:30,925 INFO L225 Difference]: With dead ends: 408 [2024-11-28 03:11:30,925 INFO L226 Difference]: Without dead ends: 408 [2024-11-28 03:11:30,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:11:30,926 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 168 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:30,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 382 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 03:11:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-28 03:11:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 388. [2024-11-28 03:11:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 298 states have (on average 1.5738255033557047) internal successors, (469), 360 states have internal predecessors, (469), 15 states have call successors, (15), 12 states have call predecessors, (15), 14 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2024-11-28 03:11:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 505 transitions. [2024-11-28 03:11:30,950 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 505 transitions. Word has length 44 [2024-11-28 03:11:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:30,951 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 505 transitions. [2024-11-28 03:11:30,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:11:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 505 transitions. [2024-11-28 03:11:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 03:11:30,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:30,952 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, 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 03:11:30,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:11:31,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:31,153 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:11:31,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:31,154 INFO L85 PathProgramCache]: Analyzing trace with hash -690210553, now seen corresponding path program 1 times [2024-11-28 03:11:31,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:11:31,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011125270] [2024-11-28 03:11:31,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:31,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:31,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:31,156 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:31,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:11:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:31,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 03:11:31,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:31,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:11:32,313 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-28 03:11:32,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-28 03:11:32,378 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 03:11:32,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:33,016 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2024-11-28 03:11:33,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2024-11-28 03:11:33,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:33,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2024-11-28 03:11:38,682 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:11:38,683 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:11:38,683 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:11:38,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 33 [2024-11-28 03:11:39,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 28 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2024-11-28 03:11:40,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 28 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2024-11-28 03:11:42,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 28 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 69 [2024-11-28 03:11:47,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 38 [2024-11-28 03:11:47,794 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 03:11:47,795 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:11:47,795 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:11:47,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011125270] [2024-11-28 03:11:47,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011125270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:47,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:47,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-28 03:11:47,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67891187] [2024-11-28 03:11:47,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:47,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:11:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:11:47,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:11:47,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=173, Unknown=2, NotChecked=0, Total=210 [2024-11-28 03:11:47,797 INFO L87 Difference]: Start difference. First operand 388 states and 505 transitions. Second operand has 15 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:11:53,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:02,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:06,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:10,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:15,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:19,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:24,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:30,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:42,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:49,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:12:56,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:13:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:11,472 INFO L93 Difference]: Finished difference Result 452 states and 553 transitions. [2024-11-28 03:13:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:13:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2024-11-28 03:13:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:11,474 INFO L225 Difference]: With dead ends: 452 [2024-11-28 03:13:11,475 INFO L226 Difference]: Without dead ends: 452 [2024-11-28 03:13:11,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=181, Invalid=867, Unknown=8, NotChecked=0, Total=1056 [2024-11-28 03:13:11,476 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 487 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 65 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:11,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 693 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1399 Invalid, 17 Unknown, 0 Unchecked, 55.6s Time] [2024-11-28 03:13:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-11-28 03:13:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 361. [2024-11-28 03:13:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 278 states have (on average 1.5179856115107915) internal successors, (422), 333 states have internal predecessors, (422), 15 states have call successors, (15), 12 states have call predecessors, (15), 14 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2024-11-28 03:13:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 458 transitions. [2024-11-28 03:13:11,487 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 458 transitions. Word has length 44 [2024-11-28 03:13:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:11,487 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 458 transitions. [2024-11-28 03:13:11,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:13:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 458 transitions. [2024-11-28 03:13:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 03:13:11,488 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:11,488 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, 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 03:13:11,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 03:13:11,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:11,692 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:13:11,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2048495734, now seen corresponding path program 1 times [2024-11-28 03:13:11,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:13:11,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131710686] [2024-11-28 03:13:11,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:13:11,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:11,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:11,694 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:11,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:13:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:13:11,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-28 03:13:11,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:12,321 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 03:13:12,608 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-28 03:13:12,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-28 03:13:13,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:13:13,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:13:14,488 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 03:13:14,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:13:14,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:13:15,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2024-11-28 03:13:15,588 INFO L349 Elim1Store]: treesize reduction 98, result has 30.0 percent of original size [2024-11-28 03:13:15,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 60 [2024-11-28 03:13:15,719 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 03:13:15,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2024-11-28 03:13:16,886 INFO L349 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2024-11-28 03:13:16,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 35 [2024-11-28 03:13:17,552 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-28 03:13:17,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 42 [2024-11-28 03:13:17,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:13:17,921 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-28 03:13:17,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 42 [2024-11-28 03:13:17,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:13:18,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:13:19,862 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-28 03:13:19,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 24 [2024-11-28 03:13:20,296 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 03:13:20,296 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:13:20,296 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:13:20,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131710686] [2024-11-28 03:13:20,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131710686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:13:20,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:13:20,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2024-11-28 03:13:20,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101304594] [2024-11-28 03:13:20,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:13:20,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:13:20,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:13:20,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:13:20,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:13:20,300 INFO L87 Difference]: Start difference. First operand 361 states and 458 transitions. Second operand has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:13:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:42,624 INFO L93 Difference]: Finished difference Result 492 states and 550 transitions. [2024-11-28 03:13:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:13:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 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 03:13:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:42,626 INFO L225 Difference]: With dead ends: 492 [2024-11-28 03:13:42,627 INFO L226 Difference]: Without dead ends: 492 [2024-11-28 03:13:42,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=287, Invalid=2365, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 03:13:42,628 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 858 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:42,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 1427 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time] [2024-11-28 03:13:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-28 03:13:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 378. [2024-11-28 03:13:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 292 states have (on average 1.5308219178082192) internal successors, (447), 348 states have internal predecessors, (447), 17 states have call successors, (17), 13 states have call predecessors, (17), 15 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2024-11-28 03:13:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 487 transitions. [2024-11-28 03:13:42,640 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 487 transitions. Word has length 47 [2024-11-28 03:13:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:42,641 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 487 transitions. [2024-11-28 03:13:42,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:13:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 487 transitions. [2024-11-28 03:13:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 03:13:42,642 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:42,642 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, 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 03:13:42,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 03:13:42,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:42,842 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting free_reportsErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:13:42,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2048495735, now seen corresponding path program 1 times [2024-11-28 03:13:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:13:42,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007668409] [2024-11-28 03:13:42,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:13:42,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:42,845 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:42,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:13:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:13:43,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 03:13:43,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:43,413 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 03:13:43,717 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-28 03:13:43,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-28 03:13:44,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:13:44,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:13:45,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:13:45,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:13:45,639 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 03:13:45,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:13:46,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2024-11-28 03:13:46,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2024-11-28 03:13:46,767 INFO L349 Elim1Store]: treesize reduction 98, result has 30.0 percent of original size [2024-11-28 03:13:46,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 60 [2024-11-28 03:13:46,888 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 03:13:46,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2024-11-28 03:13:48,023 INFO L349 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2024-11-28 03:13:48,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 35 [2024-11-28 03:13:48,933 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-28 03:13:48,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 60 [2024-11-28 03:13:48,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2024-11-28 03:13:49,397 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-28 03:13:49,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 60 [2024-11-28 03:13:49,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2024-11-28 03:13:52,142 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-28 03:13:52,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 36 [2024-11-28 03:13:52,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 03:13:52,639 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 03:13:52,639 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:13:52,639 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:13:52,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007668409] [2024-11-28 03:13:52,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007668409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:13:52,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:13:52,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2024-11-28 03:13:52,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903502468] [2024-11-28 03:13:52,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:13:52,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:13:52,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:13:52,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:13:52,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:13:52,641 INFO L87 Difference]: Start difference. First operand 378 states and 487 transitions. Second operand has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:14:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:14:14,980 INFO L93 Difference]: Finished difference Result 445 states and 490 transitions. [2024-11-28 03:14:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:14:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 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 03:14:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:14:14,982 INFO L225 Difference]: With dead ends: 445 [2024-11-28 03:14:14,982 INFO L226 Difference]: Without dead ends: 445 [2024-11-28 03:14:14,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=287, Invalid=2365, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 03:14:14,983 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 829 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:14:14,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1340 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2024-11-28 03:14:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2024-11-28 03:14:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 353. [2024-11-28 03:14:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 272 states have (on average 1.4926470588235294) internal successors, (406), 325 states have internal predecessors, (406), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2024-11-28 03:14:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 438 transitions. [2024-11-28 03:14:14,992 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 438 transitions. Word has length 47 [2024-11-28 03:14:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:14:14,993 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 438 transitions. [2024-11-28 03:14:14,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:14:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 438 transitions. [2024-11-28 03:14:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:14:14,993 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:14:14,993 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, 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 03:14:15,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:14:15,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:15,195 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:14:15,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:15,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1867374713, now seen corresponding path program 1 times [2024-11-28 03:14:15,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:14:15,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821259653] [2024-11-28 03:14:15,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:15,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:15,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:15,198 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:14:15,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:14:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:15,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:14:15,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:14:15,485 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 03:14:15,947 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 03:14:15,947 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:14:15,947 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:14:15,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821259653] [2024-11-28 03:14:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821259653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:14:15,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:14:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:14:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987794913] [2024-11-28 03:14:15,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:15,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:14:15,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:14:15,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:14:15,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:14:15,949 INFO L87 Difference]: Start difference. First operand 353 states and 438 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:14:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:14:18,343 INFO L93 Difference]: Finished difference Result 363 states and 436 transitions. [2024-11-28 03:14:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:14:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-11-28 03:14:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:14:18,350 INFO L225 Difference]: With dead ends: 363 [2024-11-28 03:14:18,350 INFO L226 Difference]: Without dead ends: 363 [2024-11-28 03:14:18,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:14:18,350 INFO L435 NwaCegarLoop]: 160 mSDtfsCounter, 33 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:14:18,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 680 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 03:14:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-28 03:14:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2024-11-28 03:14:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 272 states have (on average 1.4779411764705883) internal successors, (402), 324 states have internal predecessors, (402), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2024-11-28 03:14:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 434 transitions. [2024-11-28 03:14:18,363 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 434 transitions. Word has length 46 [2024-11-28 03:14:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:14:18,363 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 434 transitions. [2024-11-28 03:14:18,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:14:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 434 transitions. [2024-11-28 03:14:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:14:18,364 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:14:18,364 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, 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 03:14:18,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 03:14:18,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:18,569 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:14:18,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1867374712, now seen corresponding path program 1 times [2024-11-28 03:14:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:14:18,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632206418] [2024-11-28 03:14:18,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:18,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:18,571 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:14:18,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:14:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:18,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:14:18,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:14:18,846 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 03:14:19,671 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 03:14:19,671 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:14:19,671 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:14:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632206418] [2024-11-28 03:14:19,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632206418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:14:19,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:14:19,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:14:19,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013605463] [2024-11-28 03:14:19,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:19,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:14:19,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:14:19,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:14:19,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:14:19,673 INFO L87 Difference]: Start difference. First operand 352 states and 434 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:14:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:14:22,036 INFO L93 Difference]: Finished difference Result 361 states and 434 transitions. [2024-11-28 03:14:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:14:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-11-28 03:14:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:14:22,038 INFO L225 Difference]: With dead ends: 361 [2024-11-28 03:14:22,038 INFO L226 Difference]: Without dead ends: 361 [2024-11-28 03:14:22,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:14:22,039 INFO L435 NwaCegarLoop]: 160 mSDtfsCounter, 29 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:14:22,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 741 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 03:14:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-11-28 03:14:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 352. [2024-11-28 03:14:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 272 states have (on average 1.4705882352941178) internal successors, (400), 324 states have internal predecessors, (400), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2024-11-28 03:14:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 432 transitions. [2024-11-28 03:14:22,051 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 432 transitions. Word has length 46 [2024-11-28 03:14:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:14:22,051 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 432 transitions. [2024-11-28 03:14:22,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:14:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 432 transitions. [2024-11-28 03:14:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:14:22,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:14:22,052 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, 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 03:14:22,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:14:22,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:22,253 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:14:22,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1751441278, now seen corresponding path program 1 times [2024-11-28 03:14:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:14:22,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898301670] [2024-11-28 03:14:22,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:22,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:22,255 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:14:22,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:14:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:22,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:14:22,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:14:22,747 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:14:22,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:14:23,205 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:14:23,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:14:23,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 03:14:23,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 15 [2024-11-28 03:14:24,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 03:14:24,327 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 03:14:24,327 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:14:24,327 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:14:24,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898301670] [2024-11-28 03:14:24,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898301670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:14:24,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:14:24,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 03:14:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709509407] [2024-11-28 03:14:24,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:24,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:14:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:14:24,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:14:24,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:14:24,329 INFO L87 Difference]: Start difference. First operand 352 states and 432 transitions. Second operand has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:14:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:14:30,732 INFO L93 Difference]: Finished difference Result 370 states and 436 transitions. [2024-11-28 03:14:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:14:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-11-28 03:14:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:14:30,735 INFO L225 Difference]: With dead ends: 370 [2024-11-28 03:14:30,735 INFO L226 Difference]: Without dead ends: 370 [2024-11-28 03:14:30,735 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:14:30,736 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 309 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:14:30,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 819 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-28 03:14:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2024-11-28 03:14:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 350. [2024-11-28 03:14:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 272 states have (on average 1.4448529411764706) internal successors, (393), 322 states have internal predecessors, (393), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2024-11-28 03:14:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 425 transitions. [2024-11-28 03:14:30,746 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 425 transitions. Word has length 49 [2024-11-28 03:14:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:14:30,746 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 425 transitions. [2024-11-28 03:14:30,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:14:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 425 transitions. [2024-11-28 03:14:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:14:30,747 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:14:30,747 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, 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 03:14:30,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 03:14:30,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:30,952 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:14:30,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1751441279, now seen corresponding path program 1 times [2024-11-28 03:14:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:14:30,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332380248] [2024-11-28 03:14:30,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:30,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:30,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:30,955 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:14:30,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:14:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:31,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-28 03:14:31,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:14:31,558 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 03:14:31,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:14:31,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:14:31,913 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 03:14:32,015 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-28 03:14:32,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2024-11-28 03:14:32,547 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 03:14:32,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 03:14:32,667 INFO L349 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2024-11-28 03:14:32,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2024-11-28 03:14:33,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:14:33,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:14:33,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 11 [2024-11-28 03:14:33,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 11 [2024-11-28 03:14:35,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:14:35,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:14:36,198 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 03:14:36,198 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:14:36,198 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:14:36,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332380248] [2024-11-28 03:14:36,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332380248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:14:36,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:14:36,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-11-28 03:14:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211106413] [2024-11-28 03:14:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:36,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:14:36,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:14:36,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:14:36,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=237, Unknown=1, NotChecked=30, Total=306 [2024-11-28 03:14:36,200 INFO L87 Difference]: Start difference. First operand 350 states and 425 transitions. Second operand has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:15:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:05,739 INFO L93 Difference]: Finished difference Result 446 states and 509 transitions. [2024-11-28 03:15:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:15:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2024-11-28 03:15:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:05,742 INFO L225 Difference]: With dead ends: 446 [2024-11-28 03:15:05,742 INFO L226 Difference]: Without dead ends: 446 [2024-11-28 03:15:05,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=4, NotChecked=64, Total=1190 [2024-11-28 03:15:05,744 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 568 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:05,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 893 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1952 Invalid, 0 Unknown, 333 Unchecked, 12.5s Time] [2024-11-28 03:15:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-28 03:15:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 349. [2024-11-28 03:15:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 272 states have (on average 1.4191176470588236) internal successors, (386), 321 states have internal predecessors, (386), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2024-11-28 03:15:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 418 transitions. [2024-11-28 03:15:05,755 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 418 transitions. Word has length 49 [2024-11-28 03:15:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:05,755 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 418 transitions. [2024-11-28 03:15:05,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 03:15:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 418 transitions. [2024-11-28 03:15:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 03:15:05,756 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:05,756 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, 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 03:15:05,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 03:15:05,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:05,957 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_list_delErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:15:05,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:05,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1870830107, now seen corresponding path program 1 times [2024-11-28 03:15:05,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:15:05,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234932478] [2024-11-28 03:15:05,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:05,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:05,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:05,961 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:05,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:15:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:06,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:15:06,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:06,400 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 03:15:06,400 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:15:06,400 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:15:06,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234932478] [2024-11-28 03:15:06,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234932478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:06,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:06,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:15:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490096288] [2024-11-28 03:15:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:06,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:15:06,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:15:06,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:15:06,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:15:06,402 INFO L87 Difference]: Start difference. First operand 349 states and 418 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:15:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:08,048 INFO L93 Difference]: Finished difference Result 368 states and 436 transitions. [2024-11-28 03:15:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:15:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-28 03:15:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:08,050 INFO L225 Difference]: With dead ends: 368 [2024-11-28 03:15:08,050 INFO L226 Difference]: Without dead ends: 368 [2024-11-28 03:15:08,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:15:08,051 INFO L435 NwaCegarLoop]: 167 mSDtfsCounter, 18 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:08,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 483 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:15:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-28 03:15:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 361. [2024-11-28 03:15:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 283 states have (on average 1.4204946996466432) internal successors, (402), 331 states have internal predecessors, (402), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-11-28 03:15:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 436 transitions. [2024-11-28 03:15:08,065 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 436 transitions. Word has length 52 [2024-11-28 03:15:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:08,066 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 436 transitions. [2024-11-28 03:15:08,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:15:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 436 transitions. [2024-11-28 03:15:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 03:15:08,068 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:08,068 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, 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 03:15:08,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:08,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:08,269 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_list_delErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [free_reportsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, free_reportsErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2024-11-28 03:15:08,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1870830108, now seen corresponding path program 1 times [2024-11-28 03:15:08,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:15:08,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875319406] [2024-11-28 03:15:08,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:08,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:08,273 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:08,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d75617-ab5f-4cfc-9ea2-02017659d23b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:15:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:08,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-28 03:15:08,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:09,144 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 03:15:09,497 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 03:15:09,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 03:15:10,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:15:10,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-28 03:15:10,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:15:10,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:15:11,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2024-11-28 03:15:11,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2024-11-28 03:15:12,691 INFO L349 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2024-11-28 03:15:12,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 33 [2024-11-28 03:15:13,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:13,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 33 treesize of output 37 [2024-11-28 03:15:14,931 INFO L349 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2024-11-28 03:15:14,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 63 [2024-11-28 03:15:17,556 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-28 03:15:17,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 147 treesize of output 115 [2024-11-28 03:15:17,796 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-28 03:15:17,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2024-11-28 03:15:24,528 INFO L349 Elim1Store]: treesize reduction 288, result has 25.0 percent of original size [2024-11-28 03:15:24,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 15 disjoint index pairs (out of 91 index pairs), introduced 15 new quantified variables, introduced 93 case distinctions, treesize of input 341 treesize of output 367 [2024-11-28 03:15:24,859 INFO L224 Elim1Store]: Index analysis took 261 ms [2024-11-28 03:15:26,793 INFO L349 Elim1Store]: treesize reduction 112, result has 60.4 percent of original size [2024-11-28 03:15:26,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 289 treesize of output 421