./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:39:15,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:39:15,906 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:39:15,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:39:15,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:39:15,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:39:15,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:39:15,947 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:39:15,947 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:39:15,948 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:39:15,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:39:15,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:39:15,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:39:15,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:39:15,949 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:39:15,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:39:15,950 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:39:15,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:39:15,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:39:15,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:39:15,951 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:39:15,951 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:39:15,951 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:39:15,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:39:15,953 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:39:15,953 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:39:15,953 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:39:15,954 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:39:15,954 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:39:15,954 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:39:15,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:39:15,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:39:15,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:39:15,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:39:15,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:39:15,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:39:15,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:39:15,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:39:15,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:39:15,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:39:15,957 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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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 -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2024-11-28 04:39:16,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:39:16,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:39:16,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:39:16,377 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:39:16,378 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:39:16,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2024-11-28 04:39:19,667 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/786935b93/567c12156acc41a3bdece03466198af2/FLAGf3fdfc0b2 [2024-11-28 04:39:20,151 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:39:20,154 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2024-11-28 04:39:20,180 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/786935b93/567c12156acc41a3bdece03466198af2/FLAGf3fdfc0b2 [2024-11-28 04:39:20,211 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/786935b93/567c12156acc41a3bdece03466198af2 [2024-11-28 04:39:20,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:39:20,218 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:39:20,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:39:20,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:39:20,231 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:39:20,232 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:20" (1/1) ... [2024-11-28 04:39:20,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c35f112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:20, skipping insertion in model container [2024-11-28 04:39:20,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:20" (1/1) ... [2024-11-28 04:39:20,293 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:39:20,751 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 04:39:20,825 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 04:39:20,833 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 04:39:20,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:39:20,863 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 04:39:20,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24487696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:20, skipping insertion in model container [2024-11-28 04:39:20,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:39:20,865 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-28 04:39:20,868 INFO L158 Benchmark]: Toolchain (without parser) took 647.99ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 77.6MB in the end (delta: 14.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:39:20,869 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:39:20,872 INFO L158 Benchmark]: CACSL2BoogieTranslator took 644.62ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 77.6MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:39:20,874 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 644.62ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 77.6MB in the end (delta: 14.1MB). 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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:39:24,094 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:39:24,262 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 04:39:24,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:39:24,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:39:24,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:39:24,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:39:24,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:39:24,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:39:24,324 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:39:24,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:39:24,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:39:24,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:39:24,326 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:39:24,326 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:39:24,326 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:39:24,326 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:39:24,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:39:24,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:39:24,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:39:24,328 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:39:24,328 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:39:24,328 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:39:24,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:39:24,328 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:39:24,328 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:39:24,329 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:39:24,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:39:24,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:39:24,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:39:24,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:39:24,331 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:39:24,331 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:39:24,331 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:39:24,331 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_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/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 -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2024-11-28 04:39:24,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:39:24,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:39:24,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:39:24,702 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:39:24,702 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:39:24,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2024-11-28 04:39:27,878 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/50f5de7e5/acde36e301fb441fbdaf397b9fd03ce2/FLAG1fc9d35e7 [2024-11-28 04:39:28,306 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:39:28,307 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2024-11-28 04:39:28,333 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/50f5de7e5/acde36e301fb441fbdaf397b9fd03ce2/FLAG1fc9d35e7 [2024-11-28 04:39:28,362 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/data/50f5de7e5/acde36e301fb441fbdaf397b9fd03ce2 [2024-11-28 04:39:28,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:39:28,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:39:28,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:39:28,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:39:28,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:39:28,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:28" (1/1) ... [2024-11-28 04:39:28,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aad33ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:28, skipping insertion in model container [2024-11-28 04:39:28,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:28" (1/1) ... [2024-11-28 04:39:28,434 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:39:28,881 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 04:39:28,934 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 04:39:28,938 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 04:39:28,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:39:28,960 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-28 04:39:28,970 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:39:29,004 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 04:39:29,030 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 04:39:29,033 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 04:39:29,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:39:29,044 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:39:29,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:39:29,257 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:39:29,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29 WrapperNode [2024-11-28 04:39:29,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:39:29,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:39:29,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:39:29,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:39:29,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,335 INFO L138 Inliner]: procedures = 166, calls = 76, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 66 [2024-11-28 04:39:29,335 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:39:29,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:39:29,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:39:29,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:39:29,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,356 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,391 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 04:39:29,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,407 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,408 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,423 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,430 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:39:29,431 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:39:29,431 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:39:29,431 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:39:29,434 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (1/1) ... [2024-11-28 04:39:29,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:39:29,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:29,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:39:29,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:39:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-28 04:39:29,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-28 04:39:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:39:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:39:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 04:39:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 04:39:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 04:39:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 04:39:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:39:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 04:39:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 04:39:29,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:39:29,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:39:29,742 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:39:29,744 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:39:30,055 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-28 04:39:30,055 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:39:30,067 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:39:30,068 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:39:30,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:30 BoogieIcfgContainer [2024-11-28 04:39:30,068 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:39:30,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:39:30,071 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:39:30,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:39:30,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:39:28" (1/3) ... [2024-11-28 04:39:30,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b61797f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:39:30, skipping insertion in model container [2024-11-28 04:39:30,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:29" (2/3) ... [2024-11-28 04:39:30,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b61797f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:39:30, skipping insertion in model container [2024-11-28 04:39:30,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:30" (3/3) ... [2024-11-28 04:39:30,080 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test17_3.i [2024-11-28 04:39:30,097 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:39:30,099 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test17_3.i that has 2 procedures, 52 locations, 1 initial locations, 3 loop locations, and 15 error locations. [2024-11-28 04:39:30,138 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:39:30,153 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;@1a638043, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:39:30,153 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-28 04:39:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:39:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:39:30,164 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:30,165 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:30,165 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:30,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash 714233942, now seen corresponding path program 1 times [2024-11-28 04:39:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:30,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225683483] [2024-11-28 04:39:30,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:30,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:30,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:30,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:30,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:39:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:30,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:39:30,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:30,425 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 04:39:30,426 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:39:30,426 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:30,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225683483] [2024-11-28 04:39:30,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225683483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:30,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:39:30,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415547460] [2024-11-28 04:39:30,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:30,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:39:30,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:30,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:39:30,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:39:30,465 INFO L87 Difference]: Start difference. First operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:30,593 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2024-11-28 04:39:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:39:30,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-28 04:39:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:30,605 INFO L225 Difference]: With dead ends: 90 [2024-11-28 04:39:30,605 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 04:39:30,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:39:30,610 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 37 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:30,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 185 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:39:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 04:39:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 54. [2024-11-28 04:39:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:39:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2024-11-28 04:39:30,680 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 11 [2024-11-28 04:39:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:30,681 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2024-11-28 04:39:30,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2024-11-28 04:39:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:39:30,683 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:30,683 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:30,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:39:30,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:30,887 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:30,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash 714155626, now seen corresponding path program 1 times [2024-11-28 04:39:30,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:30,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224951914] [2024-11-28 04:39:30,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:30,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:30,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:30,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:30,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:39:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:30,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:39:30,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:31,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:39:31,098 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 04:39:31,098 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:39:31,098 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224951914] [2024-11-28 04:39:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224951914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:31,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:31,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:39:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753189874] [2024-11-28 04:39:31,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:31,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:39:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:31,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:39:31,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:39:31,104 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:31,328 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2024-11-28 04:39:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:39:31,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-28 04:39:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:31,330 INFO L225 Difference]: With dead ends: 65 [2024-11-28 04:39:31,330 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 04:39:31,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:39:31,332 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:31,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:39:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 04:39:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-28 04:39:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 58 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:39:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-11-28 04:39:31,339 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2024-11-28 04:39:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:31,340 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-11-28 04:39:31,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-11-28 04:39:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:39:31,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:31,341 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:31,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:39:31,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:31,545 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:31,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash 714155627, now seen corresponding path program 1 times [2024-11-28 04:39:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:31,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354152384] [2024-11-28 04:39:31,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:31,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:31,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:31,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:31,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:39:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:31,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:39:31,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:31,682 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 04:39:31,867 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 04:39:31,868 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:39:31,868 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:31,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354152384] [2024-11-28 04:39:31,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354152384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:31,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:31,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 04:39:31,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27221714] [2024-11-28 04:39:31,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:31,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:39:31,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:31,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:39:31,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:39:31,870 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:32,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:32,287 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-11-28 04:39:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:39:32,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-28 04:39:32,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:32,289 INFO L225 Difference]: With dead ends: 76 [2024-11-28 04:39:32,289 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 04:39:32,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:39:32,291 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 28 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:32,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 258 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:39:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 04:39:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2024-11-28 04:39:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 68 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:39:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2024-11-28 04:39:32,299 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 11 [2024-11-28 04:39:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:32,299 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2024-11-28 04:39:32,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2024-11-28 04:39:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:39:32,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:32,300 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:32,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:39:32,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:32,501 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:32,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1601737623, now seen corresponding path program 1 times [2024-11-28 04:39:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:32,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394152121] [2024-11-28 04:39:32,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:32,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:32,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:32,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:32,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:39:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:32,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:39:32,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:32,608 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 04:39:32,609 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:39:32,609 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:32,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394152121] [2024-11-28 04:39:32,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394152121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:32,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:32,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:39:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039169786] [2024-11-28 04:39:32,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:32,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:39:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:32,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:39:32,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:39:32,611 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:32,751 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2024-11-28 04:39:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:39:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-28 04:39:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:32,754 INFO L225 Difference]: With dead ends: 106 [2024-11-28 04:39:32,754 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 04:39:32,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 04:39:32,755 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:32,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:39:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 04:39:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2024-11-28 04:39:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 68 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:39:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2024-11-28 04:39:32,773 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 11 [2024-11-28 04:39:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:32,773 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2024-11-28 04:39:32,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2024-11-28 04:39:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:39:32,774 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:32,774 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:32,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:39:32,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:32,975 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:32,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1601659307, now seen corresponding path program 1 times [2024-11-28 04:39:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:32,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110349872] [2024-11-28 04:39:32,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:32,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:32,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:32,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:32,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:39:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:33,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:39:33,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:33,111 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 04:39:33,111 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:39:33,111 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:33,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110349872] [2024-11-28 04:39:33,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110349872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:33,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:33,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:39:33,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22416611] [2024-11-28 04:39:33,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:33,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:39:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:33,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:39:33,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:39:33,114 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:33,166 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-11-28 04:39:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:39:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-28 04:39:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:33,167 INFO L225 Difference]: With dead ends: 61 [2024-11-28 04:39:33,167 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 04:39:33,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:39:33,168 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:33,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 208 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:39:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 04:39:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-28 04:39:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-11-28 04:39:33,178 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2024-11-28 04:39:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:33,178 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-11-28 04:39:33,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-11-28 04:39:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:39:33,179 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:33,179 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:33,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:39:33,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:33,380 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:33,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1857734409, now seen corresponding path program 1 times [2024-11-28 04:39:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:33,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704180566] [2024-11-28 04:39:33,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:33,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:33,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:33,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:33,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:39:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:33,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:39:33,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:33,529 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 04:39:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:39:33,782 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:39:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:39:34,598 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:34,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704180566] [2024-11-28 04:39:34,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704180566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:39:34,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:39:34,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-11-28 04:39:34,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125586503] [2024-11-28 04:39:34,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:39:34,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:39:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:34,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:39:34,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:39:34,600 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:39:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:36,005 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-28 04:39:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:39:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2024-11-28 04:39:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:36,008 INFO L225 Difference]: With dead ends: 71 [2024-11-28 04:39:36,008 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 04:39:36,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:39:36,010 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 67 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:36,010 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 370 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:39:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 04:39:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-11-28 04:39:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.44) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2024-11-28 04:39:36,017 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 14 [2024-11-28 04:39:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:36,017 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2024-11-28 04:39:36,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:39:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2024-11-28 04:39:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 04:39:36,018 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:36,018 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:36,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:39:36,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:36,219 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:36,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1932497111, now seen corresponding path program 1 times [2024-11-28 04:39:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:36,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336522179] [2024-11-28 04:39:36,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:36,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:36,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:36,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:39:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:36,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:39:36,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:39:36,373 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:39:36,373 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:36,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336522179] [2024-11-28 04:39:36,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336522179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:39:36,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:39:36,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:39:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471048462] [2024-11-28 04:39:36,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:39:36,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:39:36,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:36,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:39:36,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:39:36,376 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:36,434 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2024-11-28 04:39:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:39:36,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-11-28 04:39:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:36,438 INFO L225 Difference]: With dead ends: 70 [2024-11-28 04:39:36,438 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 04:39:36,439 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 04:39:36,440 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:36,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:39:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 04:39:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-11-28 04:39:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-28 04:39:36,454 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 22 [2024-11-28 04:39:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:36,455 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-28 04:39:36,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:39:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-28 04:39:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 04:39:36,456 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:36,456 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:36,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:39:36,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:36,660 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:36,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1708093589, now seen corresponding path program 2 times [2024-11-28 04:39:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286352697] [2024-11-28 04:39:36,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:39:36,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:36,665 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:36,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:39:36,757 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:39:36,757 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:39:36,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:39:36,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:36,797 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 04:39:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:39:37,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:39:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:39:39,734 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:39,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286352697] [2024-11-28 04:39:39,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286352697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:39:39,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:39:39,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2024-11-28 04:39:39,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687422444] [2024-11-28 04:39:39,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:39:39,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:39:39,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:39,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:39:39,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:39:39,737 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 23 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:39:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:42,495 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2024-11-28 04:39:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:39:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-11-28 04:39:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:42,498 INFO L225 Difference]: With dead ends: 82 [2024-11-28 04:39:42,498 INFO L226 Difference]: Without dead ends: 82 [2024-11-28 04:39:42,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:39:42,500 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:42,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 460 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 04:39:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-28 04:39:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2024-11-28 04:39:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2024-11-28 04:39:42,507 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 23 [2024-11-28 04:39:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:42,507 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2024-11-28 04:39:42,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:39:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2024-11-28 04:39:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:39:42,509 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:42,509 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:42,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:39:42,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:42,710 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:42,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:42,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1359134220, now seen corresponding path program 1 times [2024-11-28 04:39:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:42,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100653731] [2024-11-28 04:39:42,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:42,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:42,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:42,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:42,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:39:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:42,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:39:42,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:42,833 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 04:39:42,975 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:39:43,023 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 04:39:43,024 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 04:39:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 2 not checked. [2024-11-28 04:39:43,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:39:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 04:39:47,337 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:47,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100653731] [2024-11-28 04:39:47,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100653731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:39:47,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:39:47,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2024-11-28 04:39:47,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831293705] [2024-11-28 04:39:47,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:39:47,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:39:47,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:47,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:39:47,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=54, Unknown=2, NotChecked=14, Total=90 [2024-11-28 04:39:47,339 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:47,734 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2024-11-28 04:39:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:39:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-28 04:39:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:47,736 INFO L225 Difference]: With dead ends: 94 [2024-11-28 04:39:47,736 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 04:39:47,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=29, Invalid=83, Unknown=2, NotChecked=18, Total=132 [2024-11-28 04:39:47,737 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:47,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 169 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 152 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2024-11-28 04:39:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 04:39:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-11-28 04:39:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 81 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2024-11-28 04:39:47,742 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 35 [2024-11-28 04:39:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:47,742 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2024-11-28 04:39:47,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2024-11-28 04:39:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:39:47,743 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:47,743 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:47,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:39:47,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:47,944 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:47,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1359134221, now seen corresponding path program 1 times [2024-11-28 04:39:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347609791] [2024-11-28 04:39:47,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:39:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:47,948 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:47,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:39:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:39:48,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:39:48,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:39:48,108 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 04:39:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:39:48,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:39:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:39:50,300 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:39:50,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347609791] [2024-11-28 04:39:50,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347609791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:39:50,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:39:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2024-11-28 04:39:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20983557] [2024-11-28 04:39:50,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:39:50,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:39:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:39:50,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:39:50,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:39:50,303 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:39:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:39:52,152 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2024-11-28 04:39:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:39:52,154 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-11-28 04:39:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:39:52,154 INFO L225 Difference]: With dead ends: 90 [2024-11-28 04:39:52,155 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 04:39:52,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=299, Invalid=757, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:39:52,156 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 97 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:39:52,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 344 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:39:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 04:39:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-28 04:39:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:39:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2024-11-28 04:39:52,172 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 35 [2024-11-28 04:39:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:39:52,172 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2024-11-28 04:39:52,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:39:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2024-11-28 04:39:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:39:52,173 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:39:52,173 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:39:52,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:39:52,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:52,375 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:39:52,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:39:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash -115122965, now seen corresponding path program 3 times [2024-11-28 04:39:52,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:39:52,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990473034] [2024-11-28 04:39:52,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:39:52,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:39:52,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:39:52,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:39:52,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:40:00,149 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 04:40:00,149 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:40:00,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:40:00,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:00,186 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 04:40:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:01,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:11,259 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990473034] [2024-11-28 04:40:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990473034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:11,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:11,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2024-11-28 04:40:11,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851435106] [2024-11-28 04:40:11,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:11,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 04:40:11,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:11,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 04:40:11,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:40:11,263 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 40 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:15,378 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2024-11-28 04:40:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:40:15,380 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-28 04:40:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:15,381 INFO L225 Difference]: With dead ends: 85 [2024-11-28 04:40:15,381 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 04:40:15,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=299, Invalid=1507, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:40:15,382 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:15,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 623 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 04:40:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 04:40:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-11-28 04:40:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.25) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2024-11-28 04:40:15,388 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 41 [2024-11-28 04:40:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:15,388 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2024-11-28 04:40:15,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2024-11-28 04:40:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:40:15,390 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:15,390 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:15,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:15,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:15,591 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:15,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash 210887577, now seen corresponding path program 2 times [2024-11-28 04:40:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108090261] [2024-11-28 04:40:15,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:40:15,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:15,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:15,595 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:15,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:40:15,740 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:40:15,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:40:15,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:40:15,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:15,771 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 04:40:15,778 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 04:40:16,284 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 04:40:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:16,317 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 04:40:16,338 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:16,338 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 04:40:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2024-11-28 04:40:16,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:20,724 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108090261] [2024-11-28 04:40:20,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108090261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1370253406] [2024-11-28 04:40:20,725 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:40:20,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:40:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:40:20,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:40:20,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-28 04:40:21,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:40:21,125 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:40:21,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:40:21,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:21,149 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 04:40:21,157 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 04:40:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:21,646 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 04:40:21,657 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:21,658 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 04:40:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2024-11-28 04:40:21,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:21,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1370253406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:21,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:21,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-28 04:40:21,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040025881] [2024-11-28 04:40:21,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:21,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:40:21,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:21,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:40:21,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=107, Unknown=2, NotChecked=20, Total=156 [2024-11-28 04:40:21,916 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:22,669 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-11-28 04:40:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:40:22,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2024-11-28 04:40:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:22,671 INFO L225 Difference]: With dead ends: 115 [2024-11-28 04:40:22,672 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 04:40:22,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=49, Invalid=225, Unknown=2, NotChecked=30, Total=306 [2024-11-28 04:40:22,673 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 43 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:22,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 347 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2024-11-28 04:40:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 04:40:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2024-11-28 04:40:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 95 states have internal predecessors, (108), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:40:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2024-11-28 04:40:22,680 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 50 [2024-11-28 04:40:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:22,681 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2024-11-28 04:40:22,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2024-11-28 04:40:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:40:22,682 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:22,683 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:22,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2024-11-28 04:40:22,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:40:23,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:23,084 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:23,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 799447720, now seen corresponding path program 1 times [2024-11-28 04:40:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:23,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455951676] [2024-11-28 04:40:23,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:23,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:23,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:23,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:23,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:40:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:23,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:40:23,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:40:23,271 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:23,271 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:23,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455951676] [2024-11-28 04:40:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455951676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:23,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:23,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:40:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409897985] [2024-11-28 04:40:23,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:23,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:40:23,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:23,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:40:23,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:23,273 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:40:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:23,302 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2024-11-28 04:40:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:40:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2024-11-28 04:40:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:23,304 INFO L225 Difference]: With dead ends: 106 [2024-11-28 04:40:23,304 INFO L226 Difference]: Without dead ends: 106 [2024-11-28 04:40:23,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 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 04:40:23,305 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:23,305 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 185 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:40:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-28 04:40:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2024-11-28 04:40:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 96 states have internal predecessors, (109), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:40:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2024-11-28 04:40:23,310 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 52 [2024-11-28 04:40:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:23,310 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2024-11-28 04:40:23,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:40:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2024-11-28 04:40:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:40:23,312 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:23,312 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:23,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:23,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:23,513 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:23,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1752709241, now seen corresponding path program 1 times [2024-11-28 04:40:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:23,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940948825] [2024-11-28 04:40:23,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:23,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:23,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:23,517 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:23,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:40:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:23,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:40:23,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-28 04:40:23,696 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:23,696 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940948825] [2024-11-28 04:40:23,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940948825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:23,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:23,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:40:23,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915071227] [2024-11-28 04:40:23,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:23,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:40:23,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:23,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:40:23,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:40:23,697 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:23,772 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2024-11-28 04:40:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:40:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2024-11-28 04:40:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:23,774 INFO L225 Difference]: With dead ends: 108 [2024-11-28 04:40:23,774 INFO L226 Difference]: Without dead ends: 108 [2024-11-28 04:40:23,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 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 04:40:23,775 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:23,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 126 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:40:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-28 04:40:23,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2024-11-28 04:40:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 89 states have (on average 1.247191011235955) internal successors, (111), 98 states have internal predecessors, (111), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:40:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2024-11-28 04:40:23,780 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 52 [2024-11-28 04:40:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:23,781 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2024-11-28 04:40:23,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2024-11-28 04:40:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:40:23,782 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:23,782 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:23,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:23,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:23,983 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:23,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:23,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2036173492, now seen corresponding path program 1 times [2024-11-28 04:40:23,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:23,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205836243] [2024-11-28 04:40:23,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:23,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:23,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:23,986 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:23,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:40:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:24,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:40:24,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-28 04:40:24,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-28 04:40:24,384 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205836243] [2024-11-28 04:40:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205836243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:24,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-11-28 04:40:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260391044] [2024-11-28 04:40:24,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:24,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:40:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:24,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:40:24,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:24,386 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:24,425 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2024-11-28 04:40:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:40:24,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2024-11-28 04:40:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:24,426 INFO L225 Difference]: With dead ends: 105 [2024-11-28 04:40:24,426 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 04:40:24,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 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 04:40:24,427 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:24,427 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 142 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:40:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 04:40:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2024-11-28 04:40:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:40:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2024-11-28 04:40:24,432 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 55 [2024-11-28 04:40:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:24,432 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2024-11-28 04:40:24,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2024-11-28 04:40:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:40:24,434 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:24,434 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:24,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:24,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:24,634 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:24,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1041233566, now seen corresponding path program 1 times [2024-11-28 04:40:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392230071] [2024-11-28 04:40:24,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:24,637 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:24,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:40:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:24,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:40:24,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-28 04:40:24,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:40:25,095 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392230071] [2024-11-28 04:40:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392230071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:25,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:25,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2024-11-28 04:40:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506389250] [2024-11-28 04:40:25,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:25,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:40:25,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:25,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:40:25,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:40:25,096 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:25,206 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-28 04:40:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:40:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-11-28 04:40:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:25,207 INFO L225 Difference]: With dead ends: 91 [2024-11-28 04:40:25,207 INFO L226 Difference]: Without dead ends: 91 [2024-11-28 04:40:25,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:40:25,208 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:25,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 106 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:40:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-28 04:40:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-28 04:40:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 84 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:40:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-28 04:40:25,213 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 55 [2024-11-28 04:40:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:25,213 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-28 04:40:25,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-28 04:40:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 04:40:25,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:25,215 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:25,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:40:25,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:25,415 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:25,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1135233703, now seen corresponding path program 1 times [2024-11-28 04:40:25,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:25,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995771951] [2024-11-28 04:40:25,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:25,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:25,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:25,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:40:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:25,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:40:25,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:25,948 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_26| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_26|)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_26| (_ bv0 1))))) is different from true [2024-11-28 04:40:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:40:25,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:26,070 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2024-11-28 04:40:26,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2024-11-28 04:40:26,508 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:26,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995771951] [2024-11-28 04:40:26,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995771951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:26,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693909439] [2024-11-28 04:40:26,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:26,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:40:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:40:26,510 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:40:26,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-28 04:40:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:26,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:40:26,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:40:27,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:27,566 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2024-11-28 04:40:27,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2024-11-28 04:40:27,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1693909439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:27,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:27,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2024-11-28 04:40:27,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434196044] [2024-11-28 04:40:27,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:27,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:40:27,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:27,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:40:27,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=106, Unknown=1, NotChecked=20, Total=156 [2024-11-28 04:40:27,973 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:40:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:28,402 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2024-11-28 04:40:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:40:28,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2024-11-28 04:40:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:28,404 INFO L225 Difference]: With dead ends: 117 [2024-11-28 04:40:28,404 INFO L226 Difference]: Without dead ends: 107 [2024-11-28 04:40:28,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 201 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=221, Unknown=1, NotChecked=30, Total=306 [2024-11-28 04:40:28,405 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 74 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:28,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 244 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2024-11-28 04:40:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-28 04:40:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2024-11-28 04:40:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.180722891566265) internal successors, (98), 90 states have internal predecessors, (98), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:40:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2024-11-28 04:40:28,409 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 58 [2024-11-28 04:40:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:28,409 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2024-11-28 04:40:28,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:40:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2024-11-28 04:40:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 04:40:28,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:28,410 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:28,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:40:28,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-28 04:40:28,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:40:28,815 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:28,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2048522220, now seen corresponding path program 1 times [2024-11-28 04:40:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:28,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519766570] [2024-11-28 04:40:28,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:28,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:28,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:28,818 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:28,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:40:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:29,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:40:29,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:29,032 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 04:40:29,043 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 04:40:29,529 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 04:40:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:29,549 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 04:40:29,565 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:29,565 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 04:40:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:29,757 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 04:40:29,773 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:29,773 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 04:40:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 4 not checked. [2024-11-28 04:40:29,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:34,235 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519766570] [2024-11-28 04:40:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519766570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19380062] [2024-11-28 04:40:34,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:34,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:40:34,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:40:34,238 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:40:34,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-28 04:40:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:34,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:40:34,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:34,854 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 04:40:34,863 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 04:40:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:35,289 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 04:40:35,302 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:35,302 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 04:40:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:35,418 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 04:40:35,431 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:35,431 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 04:40:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 4 not checked. [2024-11-28 04:40:35,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [19380062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:35,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2024-11-28 04:40:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571404988] [2024-11-28 04:40:35,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:35,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:40:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:35,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:40:35,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=150, Unknown=1, NotChecked=24, Total=210 [2024-11-28 04:40:35,813 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:40:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:36,771 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-11-28 04:40:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:40:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2024-11-28 04:40:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:36,773 INFO L225 Difference]: With dead ends: 126 [2024-11-28 04:40:36,773 INFO L226 Difference]: Without dead ends: 126 [2024-11-28 04:40:36,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2024-11-28 04:40:36,774 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:36,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 374 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 405 Invalid, 0 Unknown, 105 Unchecked, 0.7s Time] [2024-11-28 04:40:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-28 04:40:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2024-11-28 04:40:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 101 states have internal predecessors, (113), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:40:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2024-11-28 04:40:36,779 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 60 [2024-11-28 04:40:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:36,780 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2024-11-28 04:40:36,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:40:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2024-11-28 04:40:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:40:36,780 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:36,781 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:36,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:36,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-28 04:40:37,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:40:37,181 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:37,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash -624532207, now seen corresponding path program 1 times [2024-11-28 04:40:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:37,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332397417] [2024-11-28 04:40:37,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:37,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:37,184 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:37,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:40:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:37,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:40:37,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-28 04:40:37,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-28 04:40:37,633 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332397417] [2024-11-28 04:40:37,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332397417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:37,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:37,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-28 04:40:37,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415443500] [2024-11-28 04:40:37,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:37,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:40:37,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:37,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:40:37,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:40:37,636 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:40:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:37,794 INFO L93 Difference]: Finished difference Result 134 states and 159 transitions. [2024-11-28 04:40:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:40:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2024-11-28 04:40:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:37,796 INFO L225 Difference]: With dead ends: 134 [2024-11-28 04:40:37,796 INFO L226 Difference]: Without dead ends: 134 [2024-11-28 04:40:37,797 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:40:37,797 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:37,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 238 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:40:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-28 04:40:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2024-11-28 04:40:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.179245283018868) internal successors, (125), 112 states have internal predecessors, (125), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 04:40:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2024-11-28 04:40:37,803 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 59 [2024-11-28 04:40:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:37,804 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2024-11-28 04:40:37,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:40:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2024-11-28 04:40:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 04:40:37,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:37,805 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:37,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:40:38,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:38,005 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:38,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1017375974, now seen corresponding path program 1 times [2024-11-28 04:40:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:38,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369215475] [2024-11-28 04:40:38,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:38,008 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:38,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:40:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:38,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:40:38,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:40:38,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:39,068 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 11 treesize of output 9 [2024-11-28 04:40:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:40:39,518 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:39,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369215475] [2024-11-28 04:40:39,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369215475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:39,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:39,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 04:40:39,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512396696] [2024-11-28 04:40:39,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:39,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:40:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:39,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:40:39,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:40:39,520 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:40:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:41,424 INFO L93 Difference]: Finished difference Result 157 states and 190 transitions. [2024-11-28 04:40:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:40:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2024-11-28 04:40:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:41,427 INFO L225 Difference]: With dead ends: 157 [2024-11-28 04:40:41,427 INFO L226 Difference]: Without dead ends: 157 [2024-11-28 04:40:41,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:40:41,428 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:41,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 426 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:40:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-28 04:40:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 125. [2024-11-28 04:40:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 112 states have internal predecessors, (125), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 04:40:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2024-11-28 04:40:41,441 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 62 [2024-11-28 04:40:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:41,441 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2024-11-28 04:40:41,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:40:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2024-11-28 04:40:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 04:40:41,442 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:41,443 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:41,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:41,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:41,644 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:41,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1473884115, now seen corresponding path program 1 times [2024-11-28 04:40:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:41,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747991390] [2024-11-28 04:40:41,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:41,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:41,647 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:41,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:40:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:41,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:40:41,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:42,047 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 04:40:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-28 04:40:42,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:40:42,583 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:42,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747991390] [2024-11-28 04:40:42,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747991390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:42,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:42,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-11-28 04:40:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132250694] [2024-11-28 04:40:42,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:42,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:40:42,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:42,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:40:42,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:40:42,585 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:40:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:43,840 INFO L93 Difference]: Finished difference Result 147 states and 171 transitions. [2024-11-28 04:40:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:40:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2024-11-28 04:40:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:43,842 INFO L225 Difference]: With dead ends: 147 [2024-11-28 04:40:43,842 INFO L226 Difference]: Without dead ends: 147 [2024-11-28 04:40:43,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:40:43,843 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 103 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:43,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 364 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:40:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-28 04:40:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 132. [2024-11-28 04:40:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 118 states have internal predecessors, (131), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 04:40:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2024-11-28 04:40:43,853 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 63 [2024-11-28 04:40:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:43,857 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2024-11-28 04:40:43,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:40:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2024-11-28 04:40:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 04:40:43,858 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:43,858 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:43,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:44,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:44,059 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:40:44,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1554232793, now seen corresponding path program 1 times [2024-11-28 04:40:44,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:44,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118056184] [2024-11-28 04:40:44,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:44,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:44,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:44,061 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:44,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:40:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:44,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:40:44,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:44,458 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 04:40:44,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 04:40:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:40:44,752 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:40:45,096 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118056184] [2024-11-28 04:40:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118056184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:45,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2024-11-28 04:40:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99049164] [2024-11-28 04:40:45,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:45,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:40:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:45,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:40:45,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:40:45,098 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:40:49,138 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 04:40:55,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:40:59,995 WARN L539 Checker$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 04:41:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:01,418 INFO L93 Difference]: Finished difference Result 233 states and 275 transitions. [2024-11-28 04:41:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 04:41:01,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 64 [2024-11-28 04:41:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:01,421 INFO L225 Difference]: With dead ends: 233 [2024-11-28 04:41:01,422 INFO L226 Difference]: Without dead ends: 233 [2024-11-28 04:41:01,422 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=292, Invalid=2158, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 04:41:01,424 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 137 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:01,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 356 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 562 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2024-11-28 04:41:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-28 04:41:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 175. [2024-11-28 04:41:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 150 states have (on average 1.2) internal successors, (180), 154 states have internal predecessors, (180), 11 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2024-11-28 04:41:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2024-11-28 04:41:01,435 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 64 [2024-11-28 04:41:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:01,435 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2024-11-28 04:41:01,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:41:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2024-11-28 04:41:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 04:41:01,436 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:01,437 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:01,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:41:01,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:01,637 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:41:01,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1145408568, now seen corresponding path program 2 times [2024-11-28 04:41:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366718920] [2024-11-28 04:41:01,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:41:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:01,640 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:01,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:41:01,818 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:41:01,818 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:01,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:41:01,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:41:01,923 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:41:01,924 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366718920] [2024-11-28 04:41:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366718920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:41:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:41:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:41:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098725761] [2024-11-28 04:41:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:41:01,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:41:01,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:01,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:41:01,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:41:01,925 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:41:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:01,967 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2024-11-28 04:41:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:41:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-11-28 04:41:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:01,968 INFO L225 Difference]: With dead ends: 117 [2024-11-28 04:41:01,968 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 04:41:01,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:41:01,969 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:01,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:41:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 04:41:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-11-28 04:41:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 95 states have (on average 1.1263157894736842) internal successors, (107), 101 states have internal predecessors, (107), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:41:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2024-11-28 04:41:01,974 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 64 [2024-11-28 04:41:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:01,974 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2024-11-28 04:41:01,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:41:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2024-11-28 04:41:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 04:41:01,975 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:01,975 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:01,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 04:41:02,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:02,176 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:41:02,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash 936576431, now seen corresponding path program 1 times [2024-11-28 04:41:02,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:02,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124561335] [2024-11-28 04:41:02,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:02,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:02,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:02,179 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:02,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:41:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:02,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:41:02,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:02,586 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 04:41:02,773 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 04:41:02,969 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 11 treesize of output 5 [2024-11-28 04:41:03,152 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 04:41:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:41:03,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:41:03,866 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124561335] [2024-11-28 04:41:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124561335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:03,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:03,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2024-11-28 04:41:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551422154] [2024-11-28 04:41:03,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:03,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:41:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:03,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:41:03,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:41:03,868 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:41:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:06,755 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2024-11-28 04:41:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:41:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 65 [2024-11-28 04:41:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:06,758 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:41:06,758 INFO L226 Difference]: Without dead ends: 116 [2024-11-28 04:41:06,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:41:06,759 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:06,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 336 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 04:41:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-28 04:41:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2024-11-28 04:41:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 96 states have (on average 1.125) internal successors, (108), 102 states have internal predecessors, (108), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:41:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2024-11-28 04:41:06,765 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 65 [2024-11-28 04:41:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:06,765 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2024-11-28 04:41:06,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:41:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2024-11-28 04:41:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 04:41:06,766 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:06,766 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:06,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 04:41:06,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:06,967 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:41:06,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1030901604, now seen corresponding path program 1 times [2024-11-28 04:41:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995720637] [2024-11-28 04:41:06,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:06,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:06,972 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:06,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 04:41:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:07,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:41:07,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:07,192 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 04:41:07,787 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:07,787 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 04:41:07,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:41:12,095 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_18| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_18|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_18|))) is different from true [2024-11-28 04:41:12,360 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 16 treesize of output 8 [2024-11-28 04:41:12,476 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 04:41:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 145 trivial. 6 not checked. [2024-11-28 04:41:12,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:12,687 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 8 treesize of output 6 [2024-11-28 04:41:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:41:14,014 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:14,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995720637] [2024-11-28 04:41:14,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995720637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:14,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:14,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2024-11-28 04:41:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271456488] [2024-11-28 04:41:14,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:14,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:41:14,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:14,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:41:14,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=497, Unknown=1, NotChecked=44, Total=600 [2024-11-28 04:41:14,016 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:41:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:22,063 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2024-11-28 04:41:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:41:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2024-11-28 04:41:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:22,065 INFO L225 Difference]: With dead ends: 122 [2024-11-28 04:41:22,065 INFO L226 Difference]: Without dead ends: 122 [2024-11-28 04:41:22,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=242, Invalid=1740, Unknown=2, NotChecked=86, Total=2070 [2024-11-28 04:41:22,066 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 92 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:22,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 425 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 631 Invalid, 0 Unknown, 87 Unchecked, 1.9s Time] [2024-11-28 04:41:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-28 04:41:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2024-11-28 04:41:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.13) internal successors, (113), 106 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:41:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2024-11-28 04:41:22,073 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 66 [2024-11-28 04:41:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:22,073 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2024-11-28 04:41:22,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:41:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2024-11-28 04:41:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:41:22,075 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:22,075 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:22,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 04:41:22,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:22,276 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:41:22,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1044447105, now seen corresponding path program 2 times [2024-11-28 04:41:22,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:22,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20649902] [2024-11-28 04:41:22,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:41:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:22,279 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:22,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:41:22,566 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:41:22,566 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:22,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 04:41:22,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:22,623 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 04:41:22,638 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 04:41:23,547 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 04:41:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:23,580 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 04:41:23,607 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:23,607 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 04:41:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:23,942 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 04:41:23,976 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:23,977 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 04:41:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:24,299 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 04:41:24,325 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:24,325 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 04:41:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 157 trivial. 6 not checked. [2024-11-28 04:41:24,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:29,060 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20649902] [2024-11-28 04:41:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20649902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:41:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [290766447] [2024-11-28 04:41:29,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:41:29,061 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:41:29,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:41:29,065 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:41:29,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-28 04:41:29,788 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:41:29,788 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:29,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 04:41:29,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:29,851 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 04:41:29,863 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 04:41:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:30,579 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 04:41:30,603 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:30,603 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 04:41:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:30,792 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 04:41:30,822 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:30,822 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 04:41:31,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:31,020 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 04:41:31,050 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:31,050 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 04:41:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 157 trivial. 6 not checked. [2024-11-28 04:41:31,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:35,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [290766447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:41:35,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:35,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2024-11-28 04:41:35,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523626588] [2024-11-28 04:41:35,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:35,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:41:35,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:35,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:41:35,499 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=199, Unknown=2, NotChecked=28, Total=272 [2024-11-28 04:41:35,500 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:41:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:37,005 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2024-11-28 04:41:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:41:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 70 [2024-11-28 04:41:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:37,007 INFO L225 Difference]: With dead ends: 120 [2024-11-28 04:41:37,007 INFO L226 Difference]: Without dead ends: 120 [2024-11-28 04:41:37,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=65, Invalid=357, Unknown=2, NotChecked=38, Total=462 [2024-11-28 04:41:37,007 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:37,008 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 368 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 388 Invalid, 0 Unknown, 77 Unchecked, 1.1s Time] [2024-11-28 04:41:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-28 04:41:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-11-28 04:41:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.12) internal successors, (112), 106 states have internal predecessors, (112), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:41:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2024-11-28 04:41:37,013 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 70 [2024-11-28 04:41:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:37,013 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2024-11-28 04:41:37,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:41:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2024-11-28 04:41:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 04:41:37,014 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:37,015 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:37,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2024-11-28 04:41:37,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 04:41:37,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:37,415 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:41:37,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1721496089, now seen corresponding path program 1 times [2024-11-28 04:41:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138639764] [2024-11-28 04:41:37,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:37,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:37,418 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:37,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 04:41:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:37,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:41:37,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-11-28 04:41:37,786 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-11-28 04:41:38,145 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:38,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138639764] [2024-11-28 04:41:38,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138639764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:38,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:38,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2024-11-28 04:41:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947080240] [2024-11-28 04:41:38,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:38,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:41:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:38,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:41:38,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:41:38,146 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:41:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:38,453 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2024-11-28 04:41:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:41:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 69 [2024-11-28 04:41:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:38,454 INFO L225 Difference]: With dead ends: 124 [2024-11-28 04:41:38,454 INFO L226 Difference]: Without dead ends: 124 [2024-11-28 04:41:38,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:41:38,455 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:38,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 264 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:41:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-28 04:41:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2024-11-28 04:41:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 113 states have internal predecessors, (119), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:41:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2024-11-28 04:41:38,461 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 69 [2024-11-28 04:41:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:38,461 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2024-11-28 04:41:38,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:41:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2024-11-28 04:41:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 04:41:38,462 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:38,463 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:38,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 04:41:38,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:38,664 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:41:38,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash -116804376, now seen corresponding path program 1 times [2024-11-28 04:41:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:38,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376754599] [2024-11-28 04:41:38,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:38,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:38,666 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:38,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 04:41:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:38,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:41:38,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-11-28 04:41:39,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:39,158 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-28 04:41:39,158 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 16 treesize of output 15 [2024-11-28 04:41:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-11-28 04:41:39,308 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:39,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376754599] [2024-11-28 04:41:39,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376754599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:39,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:39,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2024-11-28 04:41:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128585339] [2024-11-28 04:41:39,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:39,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:41:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:39,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:41:39,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:41:39,310 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:39,499 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2024-11-28 04:41:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:41:39,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2024-11-28 04:41:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:39,501 INFO L225 Difference]: With dead ends: 127 [2024-11-28 04:41:39,501 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 04:41:39,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:41:39,502 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:39,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 67 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:41:39,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 04:41:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2024-11-28 04:41:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 102 states have (on average 1.107843137254902) internal successors, (113), 107 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:41:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2024-11-28 04:41:39,507 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 73 [2024-11-28 04:41:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:39,508 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2024-11-28 04:41:39,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2024-11-28 04:41:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 04:41:39,509 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:39,510 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:39,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 04:41:39,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:39,711 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:41:39,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:39,711 INFO L85 PathProgramCache]: Analyzing trace with hash -579851669, now seen corresponding path program 1 times [2024-11-28 04:41:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:39,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232725616] [2024-11-28 04:41:39,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:39,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:39,714 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:39,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 04:41:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:39,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:41:39,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:41,254 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 04:41:41,569 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 04:41:41,570 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 37 treesize of output 29 [2024-11-28 04:41:41,884 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 38 treesize of output 22 [2024-11-28 04:41:51,206 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_37| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_37|)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_37| (_ bv0 1))))) is different from true [2024-11-28 04:41:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-28 04:41:51,219 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:58,380 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232725616] [2024-11-28 04:42:58,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232725616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [131600525] [2024-11-28 04:42:58,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:58,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:42:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:42:58,383 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:42:58,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-28 04:42:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:59,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 04:42:59,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:43:10,175 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 04:43:10,744 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2024-11-28 04:43:10,744 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 42 treesize of output 32 [2024-11-28 04:43:11,221 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 38 treesize of output 22 [2024-11-28 04:43:22,509 WARN L873 $PredicateComparison]: unable to prove that (and (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1)) (exists ((|v_ULTIMATE.start_alloc_17_#t~mem44#1.base_36| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_39| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_39|)) (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_39| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_36| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_39|))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_36|)) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_36| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_39| (_ bv0 1)) |c_#valid|)))) is different from true [2024-11-28 04:43:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-28 04:43:22,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:43:23,809 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 24 treesize of output 22 [2024-11-28 04:43:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [131600525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:43:54,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:43:54,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2024-11-28 04:43:54,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715779079] [2024-11-28 04:43:54,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:43:54,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:43:54,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:43:54,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:43:54,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2397, Unknown=26, NotChecked=202, Total=2862 [2024-11-28 04:43:54,983 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 33 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 04:44:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:05,378 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2024-11-28 04:44:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:44:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 75 [2024-11-28 04:44:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:05,380 INFO L225 Difference]: With dead ends: 125 [2024-11-28 04:44:05,380 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 04:44:05,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 136.5s TimeCoverageRelationStatistics Valid=464, Invalid=4487, Unknown=27, NotChecked=278, Total=5256 [2024-11-28 04:44:05,382 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:05,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 347 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 688 Invalid, 3 Unknown, 154 Unchecked, 2.5s Time] [2024-11-28 04:44:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 04:44:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-28 04:44:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 95 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:44:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2024-11-28 04:44:05,387 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 75 [2024-11-28 04:44:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:05,387 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2024-11-28 04:44:05,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 04:44:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2024-11-28 04:44:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-28 04:44:05,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:05,389 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:05,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2024-11-28 04:44:05,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-28 04:44:05,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:05,790 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:44:05,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1507685313, now seen corresponding path program 1 times [2024-11-28 04:44:05,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:05,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576420808] [2024-11-28 04:44:05,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:05,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:05,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:05,792 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:05,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 04:44:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:06,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:44:06,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-28 04:44:06,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-28 04:44:06,572 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:06,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576420808] [2024-11-28 04:44:06,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576420808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:44:06,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:06,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-28 04:44:06,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562512308] [2024-11-28 04:44:06,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:06,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:44:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:44:06,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:44:06,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:44:06,574 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:44:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:07,027 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2024-11-28 04:44:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:44:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 78 [2024-11-28 04:44:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:07,028 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:44:07,029 INFO L226 Difference]: Without dead ends: 116 [2024-11-28 04:44:07,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:44:07,030 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 22 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:07,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 296 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:44:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-28 04:44:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-11-28 04:44:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 105 states have internal predecessors, (110), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:44:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2024-11-28 04:44:07,034 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 78 [2024-11-28 04:44:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:07,035 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2024-11-28 04:44:07,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:44:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2024-11-28 04:44:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:44:07,036 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:07,036 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:07,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 04:44:07,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:07,237 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:44:07,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:07,237 INFO L85 PathProgramCache]: Analyzing trace with hash 604810578, now seen corresponding path program 3 times [2024-11-28 04:44:07,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:07,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998689780] [2024-11-28 04:44:07,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:44:07,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:07,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:07,239 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:07,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 04:44:07,524 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:44:07,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:44:07,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:44:07,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:07,573 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 04:44:07,584 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 04:44:08,434 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 04:44:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:44:08,472 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 04:44:08,500 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:08,500 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 04:44:08,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:44:08,832 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 04:44:08,864 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:08,865 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 04:44:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:44:09,208 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 04:44:09,232 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:09,232 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 04:44:09,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:44:09,559 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 04:44:09,588 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:09,588 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 04:44:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 169 trivial. 8 not checked. [2024-11-28 04:44:09,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:14,324 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:14,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998689780] [2024-11-28 04:44:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998689780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:44:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1721977425] [2024-11-28 04:44:14,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:44:14,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:44:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:44:14,331 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:44:14,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-28 04:44:14,858 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:44:14,858 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:44:14,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 04:44:14,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:14,888 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 04:44:14,899 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 04:44:15,692 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:15,692 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 04:44:15,705 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 04:44:16,014 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 04:44:16,014 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 13 [2024-11-28 04:44:16,063 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:16,063 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 04:44:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:44:16,349 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 04:44:16,372 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:16,373 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 04:44:16,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:44:16,573 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 04:44:16,604 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:44:16,605 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 04:44:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 161 trivial. 12 not checked. [2024-11-28 04:44:16,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1721977425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:44:17,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:17,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 19 [2024-11-28 04:44:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921815759] [2024-11-28 04:44:17,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:17,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:44:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:44:17,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:44:17,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=361, Unknown=2, NotChecked=38, Total=462 [2024-11-28 04:44:17,160 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:44:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:19,560 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2024-11-28 04:44:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:44:19,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 80 [2024-11-28 04:44:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:19,561 INFO L225 Difference]: With dead ends: 124 [2024-11-28 04:44:19,562 INFO L226 Difference]: Without dead ends: 124 [2024-11-28 04:44:19,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=84, Invalid=568, Unknown=2, NotChecked=48, Total=702 [2024-11-28 04:44:19,562 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:19,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 514 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 672 Invalid, 0 Unknown, 83 Unchecked, 1.9s Time] [2024-11-28 04:44:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-28 04:44:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2024-11-28 04:44:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 104 states have (on average 1.0865384615384615) internal successors, (113), 108 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:44:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2024-11-28 04:44:19,568 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 80 [2024-11-28 04:44:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:19,569 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2024-11-28 04:44:19,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:44:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2024-11-28 04:44:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:44:19,570 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:19,570 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:19,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2024-11-28 04:44:19,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 04:44:19,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:19,971 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:44:19,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2051792614, now seen corresponding path program 2 times [2024-11-28 04:44:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:19,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521427566] [2024-11-28 04:44:19,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:44:19,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:19,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:19,974 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:19,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 04:44:20,240 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:44:20,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:44:20,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:44:20,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-28 04:44:20,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:21,334 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 34 treesize of output 30 [2024-11-28 04:44:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-28 04:44:23,354 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521427566] [2024-11-28 04:44:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521427566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:44:23,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:23,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-28 04:44:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989394448] [2024-11-28 04:44:23,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:23,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:44:23,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:44:23,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:44:23,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:44:23,356 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:44:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:26,350 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2024-11-28 04:44:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:44:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2024-11-28 04:44:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:26,353 INFO L225 Difference]: With dead ends: 144 [2024-11-28 04:44:26,353 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 04:44:26,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:44:26,355 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 115 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:26,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 486 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 04:44:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 04:44:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 123. [2024-11-28 04:44:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 111 states have internal predecessors, (117), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:44:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2024-11-28 04:44:26,363 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 79 [2024-11-28 04:44:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:26,364 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2024-11-28 04:44:26,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:44:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2024-11-28 04:44:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:44:26,365 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:26,365 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:26,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 04:44:26,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:26,566 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:44:26,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -818938399, now seen corresponding path program 1 times [2024-11-28 04:44:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98125316] [2024-11-28 04:44:26,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:26,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:26,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:26,568 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:26,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 04:44:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:26,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 04:44:26,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:27,239 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 04:44:27,598 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 23 treesize of output 11 [2024-11-28 04:44:28,066 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 19 treesize of output 18 [2024-11-28 04:44:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:44:28,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-28 04:44:29,192 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:29,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98125316] [2024-11-28 04:44:29,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98125316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:44:29,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:29,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2024-11-28 04:44:29,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153761200] [2024-11-28 04:44:29,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:29,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:44:29,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:44:29,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:44:29,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:44:29,194 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 04:44:34,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:44:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:34,746 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2024-11-28 04:44:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 04:44:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 80 [2024-11-28 04:44:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:34,747 INFO L225 Difference]: With dead ends: 137 [2024-11-28 04:44:34,747 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 04:44:34,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=2153, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 04:44:34,748 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 118 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:34,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 519 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 04:44:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 04:44:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2024-11-28 04:44:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 112 states have internal predecessors, (118), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:44:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2024-11-28 04:44:34,754 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 80 [2024-11-28 04:44:34,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:34,754 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2024-11-28 04:44:34,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 04:44:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2024-11-28 04:44:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 04:44:34,756 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:34,756 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:34,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 04:44:34,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:34,956 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:44:34,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 382713509, now seen corresponding path program 1 times [2024-11-28 04:44:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:34,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300235529] [2024-11-28 04:44:34,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:34,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:34,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:34,959 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:34,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 04:44:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:35,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:44:35,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:35,857 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 04:44:36,221 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 23 treesize of output 11 [2024-11-28 04:44:36,725 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 19 treesize of output 18 [2024-11-28 04:44:36,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:44:36,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 04:44:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-28 04:44:37,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-28 04:44:38,080 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:38,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300235529] [2024-11-28 04:44:38,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300235529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:44:38,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:38,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2024-11-28 04:44:38,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800154070] [2024-11-28 04:44:38,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:38,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:44:38,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:44:38,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:44:38,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:44:38,082 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 24 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 21 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 04:44:42,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:44:48,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:44:52,659 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 04:44:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:53,653 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2024-11-28 04:44:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 04:44:53,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 21 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 81 [2024-11-28 04:44:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:53,655 INFO L225 Difference]: With dead ends: 135 [2024-11-28 04:44:53,655 INFO L226 Difference]: Without dead ends: 135 [2024-11-28 04:44:53,656 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=332, Invalid=2638, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 04:44:53,657 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 111 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:53,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 381 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 823 Invalid, 2 Unknown, 0 Unchecked, 12.1s Time] [2024-11-28 04:44:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-28 04:44:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2024-11-28 04:44:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.091743119266055) internal successors, (119), 113 states have internal predecessors, (119), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:44:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2024-11-28 04:44:53,663 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 81 [2024-11-28 04:44:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:53,663 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2024-11-28 04:44:53,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 21 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 04:44:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2024-11-28 04:44:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 04:44:53,664 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:53,665 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:53,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 04:44:53,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:53,865 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:44:53,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1020783005, now seen corresponding path program 1 times [2024-11-28 04:44:53,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:53,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664275659] [2024-11-28 04:44:53,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:53,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:53,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:53,868 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:53,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 04:44:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:54,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:44:54,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:54,412 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 04:44:54,600 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 04:44:54,775 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 11 treesize of output 5 [2024-11-28 04:44:54,994 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-28 04:44:54,994 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 25 treesize of output 28 [2024-11-28 04:44:55,225 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 39 treesize of output 23 [2024-11-28 04:44:55,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 5 [2024-11-28 04:44:56,135 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 28 treesize of output 17 [2024-11-28 04:44:56,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:44:56,169 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 1 case distinctions, treesize of input 35 treesize of output 26 [2024-11-28 04:44:56,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:44:56,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-11-28 04:44:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 04:44:56,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:57,714 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:57,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664275659] [2024-11-28 04:44:57,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664275659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:44:57,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1290915324] [2024-11-28 04:44:57,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:57,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:44:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:44:57,716 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:44:57,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2024-11-28 04:44:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:59,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 04:44:59,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:59,763 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 04:44:59,849 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 04:44:59,895 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 11 treesize of output 5 [2024-11-28 04:44:59,982 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-28 04:44:59,982 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 25 treesize of output 28 [2024-11-28 04:45:00,068 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 39 treesize of output 23 [2024-11-28 04:45:00,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 5 [2024-11-28 04:45:00,605 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 28 treesize of output 17 [2024-11-28 04:45:00,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:45:00,635 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 1 case distinctions, treesize of input 35 treesize of output 26 [2024-11-28 04:45:00,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:45:00,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-11-28 04:45:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2024-11-28 04:45:00,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:45:01,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1290915324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:45:01,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:45:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 23 [2024-11-28 04:45:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725318389] [2024-11-28 04:45:01,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:45:01,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:45:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:45:01,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:45:01,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:45:01,190 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:45:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:45:04,974 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2024-11-28 04:45:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:45:04,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 82 [2024-11-28 04:45:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:45:04,976 INFO L225 Difference]: With dead ends: 133 [2024-11-28 04:45:04,976 INFO L226 Difference]: Without dead ends: 133 [2024-11-28 04:45:04,977 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:45:04,977 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:45:04,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 443 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 859 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 04:45:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-28 04:45:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-28 04:45:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 120 states have internal predecessors, (127), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:45:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2024-11-28 04:45:04,988 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 82 [2024-11-28 04:45:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:45:04,989 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2024-11-28 04:45:04,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:45:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2024-11-28 04:45:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 04:45:04,990 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:45:04,990 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:45:05,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 04:45:05,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2024-11-28 04:45:05,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:45:05,391 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:45:05,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:45:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1579501976, now seen corresponding path program 1 times [2024-11-28 04:45:05,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:45:05,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725723580] [2024-11-28 04:45:05,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:45:05,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:05,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:45:05,394 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:45:05,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 04:45:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:45:05,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:45:05,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:45:05,729 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 04:45:06,340 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:45:06,340 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 04:45:06,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 04:45:10,693 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57| (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57|) (_ bv0 32))))) is different from true [2024-11-28 04:45:10,838 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 24 treesize of output 12 [2024-11-28 04:45:14,974 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58| (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58|) (_ bv0 32))))) is different from true [2024-11-28 04:45:15,294 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 20 treesize of output 19 [2024-11-28 04:45:15,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 04:45:15,718 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 04:45:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 145 trivial. 16 not checked. [2024-11-28 04:45:15,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:45:16,274 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 8 treesize of output 6 [2024-11-28 04:45:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 04:45:17,976 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:45:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725723580] [2024-11-28 04:45:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725723580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:45:17,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:45:17,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 31 [2024-11-28 04:45:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323230011] [2024-11-28 04:45:17,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:45:17,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:45:17,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:45:17,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:45:17,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=794, Unknown=2, NotChecked=114, Total=992 [2024-11-28 04:45:17,978 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand has 32 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 28 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:45:41,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:45:43,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:45:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:45:44,781 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2024-11-28 04:45:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 04:45:44,783 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 28 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 83 [2024-11-28 04:45:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:45:44,784 INFO L225 Difference]: With dead ends: 143 [2024-11-28 04:45:44,784 INFO L226 Difference]: Without dead ends: 143 [2024-11-28 04:45:44,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 129 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=345, Invalid=2965, Unknown=4, NotChecked=226, Total=3540 [2024-11-28 04:45:44,786 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 103 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:45:44,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 525 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1097 Invalid, 0 Unknown, 216 Unchecked, 6.7s Time] [2024-11-28 04:45:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-28 04:45:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2024-11-28 04:45:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 119 states have (on average 1.1008403361344539) internal successors, (131), 124 states have internal predecessors, (131), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:45:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2024-11-28 04:45:44,790 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 83 [2024-11-28 04:45:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:45:44,790 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2024-11-28 04:45:44,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 28 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:45:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2024-11-28 04:45:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-28 04:45:44,791 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:45:44,792 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:45:44,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 04:45:44,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:44,992 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:45:44,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:45:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash 718375117, now seen corresponding path program 3 times [2024-11-28 04:45:44,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:45:44,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405139751] [2024-11-28 04:45:44,993 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:45:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:45:44,995 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:45:44,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 04:45:45,422 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:45:45,422 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:45:45,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:45:45,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:45:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-28 04:45:45,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:45:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-28 04:45:46,608 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:45:46,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405139751] [2024-11-28 04:45:46,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405139751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:45:46,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:45:46,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2024-11-28 04:45:46,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212701373] [2024-11-28 04:45:46,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:45:46,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:45:46,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:45:46,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:45:46,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:45:46,611 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:45:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:45:47,228 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2024-11-28 04:45:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:45:47,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 86 [2024-11-28 04:45:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:45:47,231 INFO L225 Difference]: With dead ends: 140 [2024-11-28 04:45:47,231 INFO L226 Difference]: Without dead ends: 140 [2024-11-28 04:45:47,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:45:47,231 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:45:47,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 349 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:45:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-28 04:45:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-11-28 04:45:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 122 states have (on average 1.098360655737705) internal successors, (134), 127 states have internal predecessors, (134), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-28 04:45:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2024-11-28 04:45:47,237 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 86 [2024-11-28 04:45:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:45:47,237 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2024-11-28 04:45:47,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:45:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2024-11-28 04:45:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 04:45:47,238 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:45:47,238 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:45:47,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 04:45:47,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:47,439 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:45:47,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:45:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash 716353125, now seen corresponding path program 4 times [2024-11-28 04:45:47,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:45:47,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525703633] [2024-11-28 04:45:47,440 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:45:47,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:47,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:45:47,442 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:45:47,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 04:45:47,816 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:45:47,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:45:47,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 04:45:47,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:45:47,872 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 04:45:47,887 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 04:45:48,864 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 04:45:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:45:48,898 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 04:45:48,925 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:45:48,925 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 04:45:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:45:49,273 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 04:45:49,315 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:45:49,315 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 04:45:49,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:45:49,662 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 04:45:49,694 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:45:49,695 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 04:45:50,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:45:50,070 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 04:45:50,097 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:45:50,097 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 04:45:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:45:50,511 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 04:45:50,538 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:45:50,538 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 04:45:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 185 trivial. 10 not checked. [2024-11-28 04:45:50,678 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:45:59,354 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:45:59,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525703633] [2024-11-28 04:45:59,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525703633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:45:59,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662517096] [2024-11-28 04:45:59,355 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:45:59,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:45:59,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:45:59,357 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:45:59,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-28 04:46:00,465 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:46:00,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:00,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 04:46:00,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:00,517 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 04:46:00,530 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 04:46:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:46:01,333 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 04:46:01,359 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:46:01,360 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 04:46:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:46:01,570 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 04:46:01,593 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:46:01,593 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 04:46:01,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:46:01,795 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 04:46:01,822 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:46:01,822 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 04:46:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:46:02,026 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 04:46:02,064 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:46:02,065 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 04:46:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:46:02,291 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 04:46:02,318 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:46:02,318 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 04:46:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 185 trivial. 10 not checked. [2024-11-28 04:46:02,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:46:06,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662517096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:46:06,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:46:06,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2024-11-28 04:46:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890724110] [2024-11-28 04:46:06,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:46:06,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:46:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:46:06,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:46:06,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=322, Unknown=3, NotChecked=36, Total=420 [2024-11-28 04:46:06,927 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 04:46:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:46:09,401 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2024-11-28 04:46:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:46:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 90 [2024-11-28 04:46:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:46:09,404 INFO L225 Difference]: With dead ends: 153 [2024-11-28 04:46:09,404 INFO L226 Difference]: Without dead ends: 153 [2024-11-28 04:46:09,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=81, Invalid=520, Unknown=3, NotChecked=46, Total=650 [2024-11-28 04:46:09,405 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 20 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:46:09,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 536 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 662 Invalid, 0 Unknown, 95 Unchecked, 2.0s Time] [2024-11-28 04:46:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-28 04:46:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 146. [2024-11-28 04:46:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 132 states have internal predecessors, (140), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:46:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2024-11-28 04:46:09,410 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 90 [2024-11-28 04:46:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:46:09,411 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2024-11-28 04:46:09,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 04:46:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2024-11-28 04:46:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 04:46:09,412 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:46:09,412 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:46:09,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 04:46:09,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2024-11-28 04:46:09,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:46:09,813 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:46:09,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:46:09,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1083147400, now seen corresponding path program 2 times [2024-11-28 04:46:09,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:46:09,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959710020] [2024-11-28 04:46:09,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:46:09,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:09,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:46:09,816 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:46:09,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 04:46:10,129 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:46:10,129 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:10,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:46:10,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2024-11-28 04:46:10,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:46:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2024-11-28 04:46:11,437 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:46:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959710020] [2024-11-28 04:46:11,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959710020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:46:11,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:46:11,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 04:46:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739920547] [2024-11-28 04:46:11,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:46:11,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:46:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:46:11,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:46:11,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:46:11,439 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 04:46:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:46:12,502 INFO L93 Difference]: Finished difference Result 190 states and 213 transitions. [2024-11-28 04:46:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:46:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 89 [2024-11-28 04:46:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:46:12,504 INFO L225 Difference]: With dead ends: 190 [2024-11-28 04:46:12,504 INFO L226 Difference]: Without dead ends: 190 [2024-11-28 04:46:12,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:46:12,505 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:46:12,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 356 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:46:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-28 04:46:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 172. [2024-11-28 04:46:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-28 04:46:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 195 transitions. [2024-11-28 04:46:12,512 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 195 transitions. Word has length 89 [2024-11-28 04:46:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:46:12,513 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 195 transitions. [2024-11-28 04:46:12,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 04:46:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 195 transitions. [2024-11-28 04:46:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 04:46:12,514 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:46:12,514 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:46:12,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 04:46:12,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:12,715 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:46:12,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:46:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1202577738, now seen corresponding path program 2 times [2024-11-28 04:46:12,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:46:12,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913228453] [2024-11-28 04:46:12,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:46:12,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:12,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:46:12,719 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:46:12,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 04:46:13,141 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:46:13,141 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:13,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:46:13,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:13,213 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 04:46:14,211 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 04:46:14,507 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 04:46:14,777 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 11 treesize of output 5 [2024-11-28 04:46:15,021 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-28 04:46:15,022 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 25 treesize of output 28 [2024-11-28 04:46:15,403 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 39 treesize of output 23 [2024-11-28 04:46:15,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 5 [2024-11-28 04:46:16,692 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 28 treesize of output 17 [2024-11-28 04:46:16,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:46:16,733 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 1 case distinctions, treesize of input 35 treesize of output 26 [2024-11-28 04:46:17,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:46:17,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-11-28 04:46:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 18 proven. 98 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-28 04:46:17,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:46:18,895 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:46:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913228453] [2024-11-28 04:46:18,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913228453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:46:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982662430] [2024-11-28 04:46:18,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:46:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:46:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:46:18,898 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:46:18,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2024-11-28 04:46:19,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:46:19,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218063344] [2024-11-28 04:46:19,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:46:19,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 04:46:19,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-28 04:46:19,733 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-28 04:46:19,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 1 [2024-11-28 04:46:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2024-11-28 04:46:20,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:46:20,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:20,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:46:20,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:21,477 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 04:46:21,839 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 04:46:22,197 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 11 treesize of output 5 [2024-11-28 04:46:22,309 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-28 04:46:22,310 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 25 treesize of output 28 [2024-11-28 04:46:22,731 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 39 treesize of output 23 [2024-11-28 04:46:22,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 5 [2024-11-28 04:46:23,450 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 28 treesize of output 17 [2024-11-28 04:46:23,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:46:23,495 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 1 case distinctions, treesize of input 35 treesize of output 26 [2024-11-28 04:46:23,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:46:23,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-11-28 04:46:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 102 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-28 04:46:23,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:46:25,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218063344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:46:25,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:46:25,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 43 [2024-11-28 04:46:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049300840] [2024-11-28 04:46:25,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:46:25,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 04:46:25,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:46:25,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 04:46:25,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2770, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 04:46:25,135 INFO L87 Difference]: Start difference. First operand 172 states and 195 transitions. Second operand has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:46:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:46:32,029 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2024-11-28 04:46:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:46:32,029 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 92 [2024-11-28 04:46:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:46:32,030 INFO L225 Difference]: With dead ends: 191 [2024-11-28 04:46:32,030 INFO L226 Difference]: Without dead ends: 191 [2024-11-28 04:46:32,031 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=349, Invalid=5201, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 04:46:32,032 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 72 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:46:32,032 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 840 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-28 04:46:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-28 04:46:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2024-11-28 04:46:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 167 states have (on average 1.1017964071856288) internal successors, (184), 171 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-28 04:46:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2024-11-28 04:46:32,038 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 92 [2024-11-28 04:46:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:46:32,038 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2024-11-28 04:46:32,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:46:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2024-11-28 04:46:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 04:46:32,039 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:46:32,039 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:46:32,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 04:46:32,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2024-11-28 04:46:32,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 04:46:32,440 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-28 04:46:32,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:46:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash -25236961, now seen corresponding path program 2 times [2024-11-28 04:46:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:46:32,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365946456] [2024-11-28 04:46:32,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:46:32,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:32,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:46:32,443 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:46:32,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 04:46:32,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:46:32,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:32,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 04:46:32,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:33,842 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 04:46:34,174 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-28 04:46:34,174 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 23 treesize of output 15 [2024-11-28 04:46:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:46:45,515 INFO L349 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2024-11-28 04:46:45,516 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 91 treesize of output 80 [2024-11-28 04:46:46,110 INFO L349 Elim1Store]: treesize reduction 166, result has 10.3 percent of original size [2024-11-28 04:46:46,110 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 7 case distinctions, treesize of input 88 treesize of output 60 [2024-11-28 04:46:46,122 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 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 04:46:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:46:48,007 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 0 case distinctions, treesize of input 69 treesize of output 48 [2024-11-28 04:46:48,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:46:48,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 60 treesize of output 38 [2024-11-28 04:46:58,204 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_#t~mem44#1.base_69| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_47| (_ BitVec 32)) (v_arrayElimCell_181 (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_47| (_ bv1 1)))) (and (= (_ bv0 1) (select (store .cse0 |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_69| (_ bv1 1)) v_arrayElimCell_181)) (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_69|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_47|) (_ bv0 1)) (= |c_#valid| (store (store (store |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_181 (_ bv0 1)) |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_69| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_47| (_ bv0 1)))))) is different from true [2024-11-28 04:46:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-11-28 04:46:58,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:16,835 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:48:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365946456] [2024-11-28 04:48:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365946456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:48:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827238921] [2024-11-28 04:48:16,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:48:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:48:16,837 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:48:16,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07626f47-28b4-4b1a-93a4-e71e2c6d9d6a/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2024-11-28 04:48:18,997 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:18,997 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:19,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:48:19,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:34,202 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 04:48:35,012 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2024-11-28 04:48:35,012 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 28 treesize of output 18 [2024-11-28 04:48:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:48:40,405 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 83 treesize of output 59 [2024-11-28 04:48:41,632 INFO L349 Elim1Store]: treesize reduction 285, result has 13.9 percent of original size [2024-11-28 04:48:41,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 93 treesize of output 90 [2024-11-28 04:48:41,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:48:41,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 58 [2024-11-28 04:48:44,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:48:44,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:48:44,634 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 1 case distinctions, treesize of input 69 treesize of output 48 [2024-11-28 04:48:45,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:48:45,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 60 treesize of output 38 [2024-11-28 04:48:59,494 WARN L873 $PredicateComparison]: unable to prove that (and (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1)) (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_49| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_#t~mem44#1.base_74| (_ BitVec 32)) (v_arrayElimCell_196 (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_49| (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_74|)) (= (store (store (store |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_196 (_ bv0 1)) |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_74| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_49| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select (store .cse0 |v_ULTIMATE.start_alloc_17_#t~mem44#1.base_74| (_ bv1 1)) v_arrayElimCell_196)) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_49|)))))) is different from true [2024-11-28 04:48:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-11-28 04:48:59,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:29,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827238921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:29,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:29,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2024-11-28 04:51:29,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775363455] [2024-11-28 04:51:29,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:29,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 04:51:29,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:29,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 04:51:29,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=5505, Unknown=56, NotChecked=306, Total=6320 [2024-11-28 04:51:29,851 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 53 states, 50 states have (on average 2.14) internal successors, (107), 47 states have internal predecessors, (107), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:51:34,158 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 04:51:42,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:51:46,462 WARN L539 Checker$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 04:51:54,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:51:59,183 WARN L539 Checker$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 04:52:03,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:15,519 WARN L539 Checker$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 04:52:19,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:31,881 WARN L539 Checker$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 04:52:35,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:40,090 WARN L539 Checker$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 04:52:44,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:48,297 WARN L539 Checker$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 04:52:52,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:56,404 WARN L539 Checker$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 04:53:00,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:53:04,427 WARN L539 Checker$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 04:53:08,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:53:12,447 WARN L539 Checker$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 04:53:16,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:53:20,469 WARN L539 Checker$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 04:53:24,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:53:28,552 WARN L539 Checker$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 04:53:32,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:53:44,925 WARN L539 Checker$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 04:53:48,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:53:53,015 WARN L539 Checker$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 04:53:58,855 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]