./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:50:10,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:50:10,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:50:10,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:50:10,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:50:10,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:50:10,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:50:10,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:50:10,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:50:10,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:50:10,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:50:10,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:50:10,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:50:10,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:50:10,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:50:10,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:50:10,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:50:10,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:50:10,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:50:10,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:50:10,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:50:10,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:50:10,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:50:10,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:50:10,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:50:10,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:50:10,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:50:10,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:50:10,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:50:10,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:50:10,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:50:10,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:50:10,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:50:10,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:50:10,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:50:10,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:50:10,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:50:10,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:50:10,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:50:10,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:50:10,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:50:10,847 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 04:50:10,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:50:10,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:50:10,902 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:50:10,903 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:50:10,903 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:50:10,903 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:50:10,903 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:50:10,904 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:50:10,904 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:50:10,904 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:50:10,905 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:50:10,906 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:50:10,906 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:50:10,906 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:50:10,907 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:50:10,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:50:10,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:50:10,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:50:10,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:50:10,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:50:10,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:50:10,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:50:10,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:50:10,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:50:10,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:50:10,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:50:10,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:50:10,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:50:10,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:50:10,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:50:10,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:50:10,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:50:10,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:50:10,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:50:10,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:50:10,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:50:10,915 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-03 04:50:11,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:50:11,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:50:11,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:50:11,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:50:11,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:50:11,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-03 04:50:11,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/c30c23e4a/a2811127104c4f8682b2f24c077e34c0/FLAG5abf3659d [2021-11-03 04:50:12,201 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:50:12,202 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-03 04:50:12,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/c30c23e4a/a2811127104c4f8682b2f24c077e34c0/FLAG5abf3659d [2021-11-03 04:50:12,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/c30c23e4a/a2811127104c4f8682b2f24c077e34c0 [2021-11-03 04:50:12,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:50:12,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:50:12,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:50:12,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:50:12,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:50:12,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:50:12" (1/1) ... [2021-11-03 04:50:12,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306b88cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:12, skipping insertion in model container [2021-11-03 04:50:12,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:50:12" (1/1) ... [2021-11-03 04:50:12,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:50:12,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:50:13,134 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-03 04:50:13,142 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-03 04:50:13,169 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:50:13,176 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:50:14,018 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,019 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,020 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,020 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,021 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,037 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,039 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,041 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,042 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,044 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,045 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,046 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,046 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:14,537 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:50:14,539 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:50:14,540 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:50:14,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:50:14,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:50:14,544 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:50:14,545 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:50:14,546 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:50:14,547 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:50:14,548 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:50:14,728 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:50:14,747 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.IllegalArgumentException: byte size smaller than 1 makes no sense at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.preferences.CACSLPreferenceInitializer$MemoryModel.getPreciseEnoughMemoryModelFor(CACSLPreferenceInitializer.java:194) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.checkIfNecessaryMemoryModelAdaption(CHandler.java:1054) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:962) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:279) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1369) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:249) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.translateInitializer(CHandler.java:2938) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleIASTDeclarator(CHandler.java:2798) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2101) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:143) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1119) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:211) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1068) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:372) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1452) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:155) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3247) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2321) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:594) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:50:14,768 INFO L168 Benchmark]: Toolchain (without parser) took 2057.93 ms. Allocated memory is still 107.0 MB. Free memory was 80.6 MB in the beginning and 52.1 MB in the end (delta: 28.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:50:14,769 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:50:14,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2055.11 ms. Allocated memory is still 107.0 MB. Free memory was 80.2 MB in the beginning and 52.1 MB in the end (delta: 28.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:50:14,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 107.0 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2055.11 ms. Allocated memory is still 107.0 MB. Free memory was 80.2 MB in the beginning and 52.1 MB in the end (delta: 28.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: IllegalArgumentException: byte size smaller than 1 makes no sense de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: IllegalArgumentException: byte size smaller than 1 makes no sense: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.preferences.CACSLPreferenceInitializer$MemoryModel.getPreciseEnoughMemoryModelFor(CACSLPreferenceInitializer.java:194) 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_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:50:17,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:50:17,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:50:17,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:50:17,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:50:17,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:50:17,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:50:17,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:50:17,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:50:17,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:50:17,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:50:17,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:50:17,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:50:17,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:50:17,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:50:17,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:50:17,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:50:17,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:50:17,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:50:17,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:50:17,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:50:17,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:50:17,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:50:17,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:50:17,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:50:17,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:50:17,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:50:17,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:50:17,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:50:17,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:50:17,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:50:17,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:50:17,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:50:17,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:50:17,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:50:17,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:50:17,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:50:17,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:50:17,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:50:17,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:50:17,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:50:17,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 04:50:17,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:50:17,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:50:17,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:50:17,518 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:50:17,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:50:17,518 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:50:17,519 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:50:17,521 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:50:17,522 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:50:17,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:50:17,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:50:17,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:50:17,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:50:17,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:50:17,526 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:50:17,527 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:50:17,527 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:50:17,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:50:17,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:50:17,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:50:17,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:50:17,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:50:17,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:50:17,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:50:17,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:50:17,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:50:17,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:50:17,530 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:50:17,530 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:50:17,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:50:17,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:50:17,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:50:17,531 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2021-11-03 04:50:17,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:50:17,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:50:17,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:50:17,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:50:17,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:50:17,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-03 04:50:18,038 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/ce4abcffa/146f68643917487bbfc2adb6f5b2421d/FLAG56da9911e [2021-11-03 04:50:18,963 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:50:18,965 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2021-11-03 04:50:19,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/ce4abcffa/146f68643917487bbfc2adb6f5b2421d/FLAG56da9911e [2021-11-03 04:50:19,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/data/ce4abcffa/146f68643917487bbfc2adb6f5b2421d [2021-11-03 04:50:19,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:50:19,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:50:19,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:50:19,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:50:19,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:50:19,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:50:19" (1/1) ... [2021-11-03 04:50:19,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b374f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:19, skipping insertion in model container [2021-11-03 04:50:19,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:50:19" (1/1) ... [2021-11-03 04:50:19,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:50:19,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:50:19,915 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-03 04:50:19,924 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-03 04:50:19,955 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:50:19,972 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:50:21,076 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,077 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,078 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,078 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,080 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,101 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,103 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,108 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,109 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,114 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,119 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,120 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,120 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,456 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:50:21,458 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:50:21,459 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:50:21,461 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:50:21,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:50:21,476 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:50:21,476 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:50:21,477 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:50:21,478 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:50:21,479 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:50:21,664 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:50:21,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:50:21,722 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:50:21,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:50:21,765 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-03 04:50:21,766 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-03 04:50:21,768 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:50:21,768 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:50:21,815 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,816 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,817 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,817 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,818 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,858 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,858 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,860 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,861 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,862 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,863 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,864 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,865 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:21,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:50:21,914 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:50:21,915 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:50:21,916 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:50:21,917 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:50:21,918 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:50:21,919 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:50:21,919 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:50:21,920 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:50:21,921 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:50:21,951 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:50:21,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:50:21,993 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:50:22,017 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2021-11-03 04:50:22,025 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2021-11-03 04:50:22,027 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:50:22,040 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:50:22,081 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,081 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,082 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,082 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,083 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,092 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,093 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,094 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,095 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,096 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,097 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,097 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,098 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:50:22,187 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:50:22,188 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:50:22,189 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:50:22,190 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:50:22,191 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:50:22,192 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:50:22,192 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:50:22,193 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:50:22,194 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:50:22,194 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:50:22,220 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:50:22,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:50:22,556 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:50:22,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22 WrapperNode [2021-11-03 04:50:22,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:50:22,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:50:22,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:50:22,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:50:22,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:50:22,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:50:22,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:50:22,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:50:22,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:50:22,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:50:22,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:50:22,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:50:22,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (1/1) ... [2021-11-03 04:50:22,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:50:22,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:50:22,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:50:22,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:50:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:50:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:50:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:50:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:50:23,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:50:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:50:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:50:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 04:50:23,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:50:23,868 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-03 04:50:23,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:50:23 BoogieIcfgContainer [2021-11-03 04:50:23,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:50:23,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:50:23,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:50:23,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:50:23,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:50:19" (1/3) ... [2021-11-03 04:50:23,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1135c4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:50:23, skipping insertion in model container [2021-11-03 04:50:23,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:50:22" (2/3) ... [2021-11-03 04:50:23,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1135c4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:50:23, skipping insertion in model container [2021-11-03 04:50:23,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:50:23" (3/3) ... [2021-11-03 04:50:23,904 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2021-11-03 04:50:23,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:50:23,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-03 04:50:23,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:50:23,994 INFO L339 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, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:50:23,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 04:50:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 63 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 04:50:24,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:24,023 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:24,024 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1119392047, now seen corresponding path program 1 times [2021-11-03 04:50:24,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:24,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818700850] [2021-11-03 04:50:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:24,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:24,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:24,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:50:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:24,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:50:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:24,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:24,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:24,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818700850] [2021-11-03 04:50:24,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818700850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:24,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:24,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:50:24,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636867473] [2021-11-03 04:50:24,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:50:24,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:50:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:50:24,613 INFO L87 Difference]: Start difference. First operand has 64 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 63 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:24,646 INFO L93 Difference]: Finished difference Result 125 states and 180 transitions. [2021-11-03 04:50:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:50:24,648 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 04:50:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:24,660 INFO L225 Difference]: With dead ends: 125 [2021-11-03 04:50:24,661 INFO L226 Difference]: Without dead ends: 59 [2021-11-03 04:50:24,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:50:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-03 04:50:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-03 04:50:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 58 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2021-11-03 04:50:24,745 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 15 [2021-11-03 04:50:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:24,746 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2021-11-03 04:50:24,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2021-11-03 04:50:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 04:50:24,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:24,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:24,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:24,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:24,969 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1706198061, now seen corresponding path program 1 times [2021-11-03 04:50:24,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:24,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359947891] [2021-11-03 04:50:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:24,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:24,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:24,974 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:25,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:50:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:50:25,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:25,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:25,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:26,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:26,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:26,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359947891] [2021-11-03 04:50:26,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359947891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:26,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:26,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 04:50:26,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022594605] [2021-11-03 04:50:26,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:50:26,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:50:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:50:26,242 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:26,582 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2021-11-03 04:50:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:50:26,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 04:50:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:26,585 INFO L225 Difference]: With dead ends: 96 [2021-11-03 04:50:26,585 INFO L226 Difference]: Without dead ends: 60 [2021-11-03 04:50:26,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:50:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-03 04:50:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-03 04:50:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2021-11-03 04:50:26,599 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 15 [2021-11-03 04:50:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:26,599 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-11-03 04:50:26,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2021-11-03 04:50:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 04:50:26,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:26,604 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:26,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:26,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:26,821 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1704351019, now seen corresponding path program 1 times [2021-11-03 04:50:26,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:26,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278092713] [2021-11-03 04:50:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:26,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:26,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:26,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:50:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:50:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:27,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:27,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:50:27,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 38 [2021-11-03 04:50:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:27,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 26 [2021-11-03 04:50:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:27,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:27,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278092713] [2021-11-03 04:50:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278092713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:27,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:27,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-03 04:50:27,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436359093] [2021-11-03 04:50:27,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:50:27,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:50:27,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:50:27,575 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:27,949 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2021-11-03 04:50:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:50:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 04:50:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:27,950 INFO L225 Difference]: With dead ends: 111 [2021-11-03 04:50:27,951 INFO L226 Difference]: Without dead ends: 63 [2021-11-03 04:50:27,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:50:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-03 04:50:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-03 04:50:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2021-11-03 04:50:27,961 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 15 [2021-11-03 04:50:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:27,961 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2021-11-03 04:50:27,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2021-11-03 04:50:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 04:50:27,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:27,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:27,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:28,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:28,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:28,181 INFO L85 PathProgramCache]: Analyzing trace with hash 70656343, now seen corresponding path program 1 times [2021-11-03 04:50:28,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:28,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711938454] [2021-11-03 04:50:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:28,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:28,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:28,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:50:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:28,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:50:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:28,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:28,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:28,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:28,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 25 [2021-11-03 04:50:28,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 27 [2021-11-03 04:50:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:29,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:29,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711938454] [2021-11-03 04:50:29,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711938454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:29,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:29,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 7 [2021-11-03 04:50:29,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488398922] [2021-11-03 04:50:29,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:50:29,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:50:29,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:50:29,007 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:29,495 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2021-11-03 04:50:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:50:29,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 04:50:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:29,498 INFO L225 Difference]: With dead ends: 118 [2021-11-03 04:50:29,498 INFO L226 Difference]: Without dead ends: 67 [2021-11-03 04:50:29,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:50:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-03 04:50:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-03 04:50:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 63 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2021-11-03 04:50:29,509 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 15 [2021-11-03 04:50:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:29,510 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2021-11-03 04:50:29,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2021-11-03 04:50:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 04:50:29,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:29,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:29,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:29,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:29,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash 750714713, now seen corresponding path program 1 times [2021-11-03 04:50:29,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:29,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204827135] [2021-11-03 04:50:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:29,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:29,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:29,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:29,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:50:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:29,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:50:29,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:30,093 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-03 04:50:30,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-03 04:50:30,226 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:50:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2021-11-03 04:50:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:30,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:30,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 24 [2021-11-03 04:50:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:30,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:30,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204827135] [2021-11-03 04:50:30,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204827135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:30,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:30,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-03 04:50:30,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965926517] [2021-11-03 04:50:30,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:50:30,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:50:30,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:50:30,360 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:30,757 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2021-11-03 04:50:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:50:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 04:50:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:30,758 INFO L225 Difference]: With dead ends: 118 [2021-11-03 04:50:30,759 INFO L226 Difference]: Without dead ends: 59 [2021-11-03 04:50:30,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:50:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-03 04:50:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-03 04:50:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2021-11-03 04:50:30,768 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 15 [2021-11-03 04:50:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:30,768 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2021-11-03 04:50:30,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2021-11-03 04:50:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 04:50:30,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:30,770 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:30,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:30,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:30,971 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash -396643720, now seen corresponding path program 1 times [2021-11-03 04:50:30,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:30,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791756098] [2021-11-03 04:50:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:30,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:30,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:31,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:50:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:50:31,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:31,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:31,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:31,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791756098] [2021-11-03 04:50:31,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791756098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:31,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:31,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:50:31,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026743542] [2021-11-03 04:50:31,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:50:31,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:50:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:50:31,329 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:31,474 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2021-11-03 04:50:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:50:31,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 04:50:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:31,475 INFO L225 Difference]: With dead ends: 100 [2021-11-03 04:50:31,475 INFO L226 Difference]: Without dead ends: 63 [2021-11-03 04:50:31,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:50:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-03 04:50:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-11-03 04:50:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 58 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-11-03 04:50:31,482 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 17 [2021-11-03 04:50:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:31,482 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-11-03 04:50:31,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-11-03 04:50:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 04:50:31,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:31,483 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:31,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:31,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:31,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1873340090, now seen corresponding path program 1 times [2021-11-03 04:50:31,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:31,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367509446] [2021-11-03 04:50:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:31,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:31,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:31,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:31,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:50:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:31,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:50:31,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:32,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:32,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:32,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367509446] [2021-11-03 04:50:32,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367509446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:32,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:32,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 04:50:32,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773455194] [2021-11-03 04:50:32,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:50:32,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:32,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:50:32,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:50:32,164 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:32,372 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2021-11-03 04:50:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:50:32,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 04:50:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:32,374 INFO L225 Difference]: With dead ends: 136 [2021-11-03 04:50:32,374 INFO L226 Difference]: Without dead ends: 98 [2021-11-03 04:50:32,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:50:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-03 04:50:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 60. [2021-11-03 04:50:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-03 04:50:32,384 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 19 [2021-11-03 04:50:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:32,384 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-03 04:50:32,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-03 04:50:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:50:32,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:32,386 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:32,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:32,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:32,603 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1055948096, now seen corresponding path program 1 times [2021-11-03 04:50:32,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:32,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361804003] [2021-11-03 04:50:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:32,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:32,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:32,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:50:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:50:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:32,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:33,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:33,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361804003] [2021-11-03 04:50:33,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361804003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:33,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:33,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 3] imperfect sequences [] total 7 [2021-11-03 04:50:33,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171084648] [2021-11-03 04:50:33,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:50:33,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:50:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:50:33,072 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:33,374 INFO L93 Difference]: Finished difference Result 151 states and 187 transitions. [2021-11-03 04:50:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:50:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:50:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:33,378 INFO L225 Difference]: With dead ends: 151 [2021-11-03 04:50:33,378 INFO L226 Difference]: Without dead ends: 113 [2021-11-03 04:50:33,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:50:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-03 04:50:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2021-11-03 04:50:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 62 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2021-11-03 04:50:33,396 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 20 [2021-11-03 04:50:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:33,397 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2021-11-03 04:50:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2021-11-03 04:50:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-03 04:50:33,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:33,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:33,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:33,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:33,599 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:33,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2137464374, now seen corresponding path program 1 times [2021-11-03 04:50:33,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:33,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235942982] [2021-11-03 04:50:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:33,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:33,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:33,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:33,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:50:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:33,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 04:50:33,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:33,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:33,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:35,015 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-11-03 04:50:35,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 88 [2021-11-03 04:50:35,035 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-03 04:50:35,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 34 [2021-11-03 04:50:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:35,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:35,858 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:50:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 3792 treesize of output 1 [2021-11-03 04:50:35,871 INFO L354 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2021-11-03 04:50:35,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3818 treesize of output 1 [2021-11-03 04:50:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:35,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:35,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235942982] [2021-11-03 04:50:35,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235942982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:35,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:35,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [] total 16 [2021-11-03 04:50:35,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874342361] [2021-11-03 04:50:35,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 04:50:35,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:35,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 04:50:35,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:50:35,882 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:39,369 INFO L93 Difference]: Finished difference Result 217 states and 265 transitions. [2021-11-03 04:50:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 04:50:39,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-03 04:50:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:39,373 INFO L225 Difference]: With dead ends: 217 [2021-11-03 04:50:39,373 INFO L226 Difference]: Without dead ends: 178 [2021-11-03 04:50:39,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2021-11-03 04:50:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-03 04:50:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 69. [2021-11-03 04:50:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-03 04:50:39,393 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 25 [2021-11-03 04:50:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:39,395 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-03 04:50:39,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-03 04:50:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-03 04:50:39,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:39,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:39,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:39,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:39,615 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1348156296, now seen corresponding path program 1 times [2021-11-03 04:50:39,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:39,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817663934] [2021-11-03 04:50:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:39,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:39,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:39,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:39,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:50:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:50:39,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 27 [2021-11-03 04:50:40,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 19 [2021-11-03 04:50:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:40,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:40,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817663934] [2021-11-03 04:50:40,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817663934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:40,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:40,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-03 04:50:40,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935553492] [2021-11-03 04:50:40,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 04:50:40,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 04:50:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:50:40,714 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:44,011 INFO L93 Difference]: Finished difference Result 291 states and 378 transitions. [2021-11-03 04:50:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-03 04:50:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-03 04:50:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:44,013 INFO L225 Difference]: With dead ends: 291 [2021-11-03 04:50:44,013 INFO L226 Difference]: Without dead ends: 243 [2021-11-03 04:50:44,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=331, Invalid=1001, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 04:50:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-03 04:50:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 82. [2021-11-03 04:50:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 81 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-11-03 04:50:44,029 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 25 [2021-11-03 04:50:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:44,029 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-11-03 04:50:44,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-11-03 04:50:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-03 04:50:44,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:44,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:44,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-03 04:50:44,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:44,249 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash 955129286, now seen corresponding path program 1 times [2021-11-03 04:50:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:44,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631152156] [2021-11-03 04:50:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:44,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:44,251 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:44,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:50:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:50:44,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:44,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:44,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631152156] [2021-11-03 04:50:44,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631152156] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:44,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:44,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 04:50:44,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201558306] [2021-11-03 04:50:44,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:50:44,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:50:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:50:44,797 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:45,137 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2021-11-03 04:50:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:50:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-03 04:50:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:45,140 INFO L225 Difference]: With dead ends: 180 [2021-11-03 04:50:45,140 INFO L226 Difference]: Without dead ends: 116 [2021-11-03 04:50:45,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:50:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-03 04:50:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2021-11-03 04:50:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 79 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2021-11-03 04:50:45,163 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 25 [2021-11-03 04:50:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:45,164 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2021-11-03 04:50:45,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2021-11-03 04:50:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:50:45,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:45,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:50:45,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:45,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:45,383 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash -313030260, now seen corresponding path program 1 times [2021-11-03 04:50:45,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:45,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918410705] [2021-11-03 04:50:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:45,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:45,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:45,386 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:50:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:45,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:50:45,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:46,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 24 [2021-11-03 04:50:46,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 13 [2021-11-03 04:50:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:46,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:46,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:46,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918410705] [2021-11-03 04:50:46,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918410705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:50:46,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197762003] [2021-11-03 04:50:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:46,389 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:50:46,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:50:46,396 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:50:46,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 04:50:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:50:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:47,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:47,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-03 04:50:48,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:50:48,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 51 [2021-11-03 04:50:48,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:50:48,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 16 [2021-11-03 04:50:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:48,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:48,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1197762003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:50:48,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307589764] [2021-11-03 04:50:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:48,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:50:48,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:50:48,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:50:48,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 04:50:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 04:50:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:49,098 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-03 04:50:49,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-03 04:50:51,758 INFO L354 Elim1Store]: treesize reduction 66, result has 37.1 percent of original size [2021-11-03 04:50:51,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 74 [2021-11-03 04:50:51,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 59 treesize of output 51 [2021-11-03 04:50:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:51,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:50:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307589764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:50:52,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:50:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 9, 8] total 23 [2021-11-03 04:50:52,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884732257] [2021-11-03 04:50:52,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:50:52,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:50:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:50:52,070 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:58,216 INFO L93 Difference]: Finished difference Result 291 states and 370 transitions. [2021-11-03 04:50:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-03 04:50:58,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:50:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:58,218 INFO L225 Difference]: With dead ends: 291 [2021-11-03 04:50:58,218 INFO L226 Difference]: Without dead ends: 240 [2021-11-03 04:50:58,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=606, Invalid=2363, Unknown=1, NotChecked=0, Total=2970 [2021-11-03 04:50:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-03 04:50:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 87. [2021-11-03 04:50:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-11-03 04:50:58,235 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 27 [2021-11-03 04:50:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:58,235 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-11-03 04:50:58,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-11-03 04:50:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-03 04:50:58,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:58,236 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:50:58,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:58,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-03 04:50:58,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:58,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:58,840 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:58,841 INFO L85 PathProgramCache]: Analyzing trace with hash -113952210, now seen corresponding path program 1 times [2021-11-03 04:50:58,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:58,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912202088] [2021-11-03 04:50:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:58,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:58,842 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:58,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:50:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:50:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:50:59,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:50:59,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:59,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912202088] [2021-11-03 04:50:59,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912202088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:59,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:59,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-03 04:50:59,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278789667] [2021-11-03 04:50:59,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:50:59,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:59,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:50:59,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:50:59,465 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:59,661 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2021-11-03 04:50:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:50:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-03 04:50:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:59,663 INFO L225 Difference]: With dead ends: 125 [2021-11-03 04:50:59,663 INFO L226 Difference]: Without dead ends: 117 [2021-11-03 04:50:59,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:50:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-03 04:50:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 89. [2021-11-03 04:50:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 88 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2021-11-03 04:50:59,680 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 28 [2021-11-03 04:50:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:59,681 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2021-11-03 04:50:59,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2021-11-03 04:50:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-03 04:50:59,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:59,682 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-03 04:50:59,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:59,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:59,910 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1451496965, now seen corresponding path program 1 times [2021-11-03 04:50:59,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:59,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429416575] [2021-11-03 04:50:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:59,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:59,913 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:59,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:51:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:00,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 04:51:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:01,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:01,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:01,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 39 [2021-11-03 04:51:01,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:01,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 38 [2021-11-03 04:51:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:02,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:02,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429416575] [2021-11-03 04:51:02,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429416575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:02,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2112794022] [2021-11-03 04:51:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:02,094 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:51:02,100 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:51:02,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 04:51:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:02,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:51:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:03,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-03 04:51:03,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-03 04:51:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:05,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:06,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2112794022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:06,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388324188] [2021-11-03 04:51:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:06,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:06,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:06,842 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:06,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 04:51:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-03 04:51:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:07,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:07,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:07,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:07,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-03 04:51:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:09,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:10,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:10,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 31 [2021-11-03 04:51:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:11,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388324188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:11,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:51:11,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 17, 16] total 49 [2021-11-03 04:51:11,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066963451] [2021-11-03 04:51:11,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-03 04:51:11,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:11,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-03 04:51:11,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1979, Unknown=0, NotChecked=0, Total=2352 [2021-11-03 04:51:11,617 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:15,369 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2021-11-03 04:51:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 04:51:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-03 04:51:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:15,371 INFO L225 Difference]: With dead ends: 145 [2021-11-03 04:51:15,371 INFO L226 Difference]: Without dead ends: 78 [2021-11-03 04:51:15,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 04:51:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-03 04:51:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-11-03 04:51:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2021-11-03 04:51:15,386 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 33 [2021-11-03 04:51:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:15,386 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2021-11-03 04:51:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2448979591836733) internal successors, (159), 49 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2021-11-03 04:51:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:51:15,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:15,387 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:15,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:15,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:15,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:15,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:15,992 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1433523821, now seen corresponding path program 1 times [2021-11-03 04:51:15,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:15,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000215873] [2021-11-03 04:51:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:15,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:15,994 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:15,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:51:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:51:16,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:17,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 27 [2021-11-03 04:51:17,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 19 [2021-11-03 04:51:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:51:17,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:20,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:20,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 43 [2021-11-03 04:51:20,347 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-03 04:51:20,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 34 [2021-11-03 04:51:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:51:20,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:20,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000215873] [2021-11-03 04:51:20,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000215873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:20,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:20,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-03 04:51:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142751305] [2021-11-03 04:51:20,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 04:51:20,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 04:51:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:51:20,492 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:21,271 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2021-11-03 04:51:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:51:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:51:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:21,272 INFO L225 Difference]: With dead ends: 109 [2021-11-03 04:51:21,273 INFO L226 Difference]: Without dead ends: 80 [2021-11-03 04:51:21,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:51:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-03 04:51:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-11-03 04:51:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-11-03 04:51:21,285 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 45 [2021-11-03 04:51:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:21,286 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-11-03 04:51:21,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-11-03 04:51:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:51:21,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:21,287 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:21,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:21,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:51:21,491 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1431676779, now seen corresponding path program 1 times [2021-11-03 04:51:21,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:21,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296834347] [2021-11-03 04:51:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:21,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:21,493 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:21,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:51:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:51:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:22,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-03 04:51:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-03 04:51:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:51:24,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:25,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 746 treesize of output 734 [2021-11-03 04:51:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:26,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 812 treesize of output 788 [2021-11-03 04:51:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:51:26,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:26,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296834347] [2021-11-03 04:51:26,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296834347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:26,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:26,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-03 04:51:26,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027123477] [2021-11-03 04:51:26,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:51:26,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:51:26,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:51:26,719 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:27,213 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2021-11-03 04:51:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:51:27,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:51:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:27,214 INFO L225 Difference]: With dead ends: 84 [2021-11-03 04:51:27,214 INFO L226 Difference]: Without dead ends: 80 [2021-11-03 04:51:27,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:51:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-03 04:51:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-03 04:51:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-11-03 04:51:27,227 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 45 [2021-11-03 04:51:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:27,227 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-11-03 04:51:27,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-11-03 04:51:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:51:27,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:27,228 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:27,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-03 04:51:27,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:51:27,428 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1086436113, now seen corresponding path program 1 times [2021-11-03 04:51:27,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:27,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100213217] [2021-11-03 04:51:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:27,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:27,432 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:27,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:51:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:51:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:51:28,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:31,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:31,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 43 [2021-11-03 04:51:31,664 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-03 04:51:31,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 34 [2021-11-03 04:51:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:51:31,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:31,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100213217] [2021-11-03 04:51:31,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100213217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:31,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:31,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-03 04:51:31,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145625600] [2021-11-03 04:51:31,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 04:51:31,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 04:51:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:51:31,802 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:32,329 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2021-11-03 04:51:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:51:32,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:51:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:32,330 INFO L225 Difference]: With dead ends: 107 [2021-11-03 04:51:32,330 INFO L226 Difference]: Without dead ends: 77 [2021-11-03 04:51:32,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:51:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-03 04:51:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-03 04:51:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-11-03 04:51:32,339 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 45 [2021-11-03 04:51:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:32,340 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-11-03 04:51:32,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-11-03 04:51:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:51:32,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:32,340 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:32,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:32,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:51:32,541 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:32,541 INFO L85 PathProgramCache]: Analyzing trace with hash -406377743, now seen corresponding path program 1 times [2021-11-03 04:51:32,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:32,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963694228] [2021-11-03 04:51:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:32,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:32,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:32,543 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:32,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:51:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:51:33,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:34,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 29 [2021-11-03 04:51:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:34,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 20 [2021-11-03 04:51:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:34,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:34,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963694228] [2021-11-03 04:51:34,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963694228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:34,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049821452] [2021-11-03 04:51:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:34,630 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:34,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:51:34,630 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:51:34,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 04:51:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:51:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:36,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:36,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:36,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:36,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:36,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:36,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-03 04:51:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:38,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:39,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:39,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8037 treesize of output 7979 [2021-11-03 04:51:39,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:39,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:39,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:40,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2021-11-03 04:51:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:40,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049821452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:40,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853531135] [2021-11-03 04:51:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:40,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:51:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:40,806 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:51:40,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 04:51:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 04:51:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:42,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:42,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:42,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:42,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:42,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-03 04:51:45,015 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:51:45,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2021-11-03 04:51:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:45,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:45,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:51:45,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8437 treesize of output 8379 [2021-11-03 04:51:46,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:46,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:46,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:46,392 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-03 04:51:46,525 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-03 04:51:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2021-11-03 04:51:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:47,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853531135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:51:47,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:51:47,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 39 [2021-11-03 04:51:47,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631351551] [2021-11-03 04:51:47,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-03 04:51:47,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-03 04:51:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:51:47,197 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 39 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:48,606 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-11-03 04:51:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:51:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 39 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:51:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:48,607 INFO L225 Difference]: With dead ends: 102 [2021-11-03 04:51:48,607 INFO L226 Difference]: Without dead ends: 58 [2021-11-03 04:51:48,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-11-03 04:51:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-03 04:51:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-03 04:51:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-03 04:51:48,621 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 45 [2021-11-03 04:51:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:48,621 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-03 04:51:48,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.82051282051282) internal successors, (188), 39 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:51:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-03 04:51:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 04:51:48,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:48,623 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:51:48,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:48,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-03 04:51:49,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:49,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:51:49,228 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1997233278, now seen corresponding path program 1 times [2021-11-03 04:51:49,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:49,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290638033] [2021-11-03 04:51:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:49,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:49,230 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:49,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:51:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-03 04:51:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:51:52,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:59,041 INFO L354 Elim1Store]: treesize reduction 21, result has 86.8 percent of original size [2021-11-03 04:51:59,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 185 [2021-11-03 04:51:59,551 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-03 04:51:59,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 191 [2021-11-03 04:52:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:03,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:03,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290638033] [2021-11-03 04:52:03,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290638033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:52:03,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664335972] [2021-11-03 04:52:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:03,054 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:52:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:52:03,055 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:52:03,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6256fb68-5a09-44c5-9016-1e4ce992d5b0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 04:52:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:04,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:52:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-03 04:52:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:05,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-03 04:52:09,756 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-11-03 04:52:09,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 88 [2021-11-03 04:52:09,767 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-03 04:52:09,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 34 [2021-11-03 04:52:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:09,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:12,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:52:12,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1538223 treesize of output 1525539 [2021-11-03 04:54:22,717 WARN L207 SmtUtils]: Spent 2.17 m on a formula simplification. DAG size of input: 756 DAG size of output: 719 [2021-11-03 04:54:28,409 WARN L207 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 715 [2021-11-03 04:54:28,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:54:28,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 899453304 treesize of output 891157036