./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_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_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/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_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/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_855bb4b8-3913-4c4c-af52-7c39ff163958/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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:29:34,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:29:34,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:29:34,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:29:34,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:29:34,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:29:34,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:29:34,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:29:34,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:29:34,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:29:34,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:29:34,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:29:34,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:29:34,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:29:34,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:29:34,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:29:34,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:29:34,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:29:34,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:29:34,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:29:34,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:29:34,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:29:34,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:29:34,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:29:34,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:29:34,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:29:34,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:29:34,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:29:34,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:29:34,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:29:34,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:29:34,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:29:34,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:29:34,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:29:34,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:29:34,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:29:34,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:29:34,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:29:34,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:29:34,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:29:34,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:29:34,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 04:29:34,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:29:34,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:29:34,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:29:34,858 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:29:34,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:29:34,858 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:29:34,859 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:29:34,859 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:29:34,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:29:34,865 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:29:34,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:29:34,866 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:29:34,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:29:34,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:29:34,867 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:29:34,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:29:34,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:29:34,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:29:34,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:29:34,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:29:34,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:29:34,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:29:34,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:29:34,869 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:29:34,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:29:34,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:29:34,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:29:34,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:29:34,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:29:34,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:29:34,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:29:34,871 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:29:34,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:29:34,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:29:34,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:29:34,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:29:34,872 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_855bb4b8-3913-4c4c-af52-7c39ff163958/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-03 04:29:35,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:29:35,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:29:35,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:29:35,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:29:35,124 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:29:35,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-03 04:29:35,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/112f8bef4/45fae68bc6c4417d981751a5d359c400/FLAG8bab50a7b [2021-11-03 04:29:35,897 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:29:35,898 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-03 04:29:35,928 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/112f8bef4/45fae68bc6c4417d981751a5d359c400/FLAG8bab50a7b [2021-11-03 04:29:35,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/112f8bef4/45fae68bc6c4417d981751a5d359c400 [2021-11-03 04:29:35,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:29:35,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:29:36,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:29:36,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:29:36,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:29:36,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:35" (1/1) ... [2021-11-03 04:29:36,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c7f9b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:36, skipping insertion in model container [2021-11-03 04:29:36,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:35" (1/1) ... [2021-11-03 04:29:36,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:29:36,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:29:36,428 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-03 04:29:36,434 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-03 04:29:36,454 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:29:36,459 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:29:37,260 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,261 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,262 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,262 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,263 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,277 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,278 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,280 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,280 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,282 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,284 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,284 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,285 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:37,662 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:29:37,664 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:29:37,665 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:29:37,667 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:29:37,669 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:29:37,670 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:29:37,671 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:29:37,672 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:29:37,673 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:29:37,674 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:29:37,854 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:29:37,876 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:29:37,882 INFO L168 Benchmark]: Toolchain (without parser) took 1883.65 ms. Allocated memory is still 109.1 MB. Free memory was 70.5 MB in the beginning and 56.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:29:37,883 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory is still 38.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:29:37,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1880.22 ms. Allocated memory is still 109.1 MB. Free memory was 70.3 MB in the beginning and 56.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:29:37,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory is still 38.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1880.22 ms. Allocated memory is still 109.1 MB. Free memory was 70.3 MB in the beginning and 56.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 18.6 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_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/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_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/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_855bb4b8-3913-4c4c-af52-7c39ff163958/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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:29:40,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:29:40,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:29:40,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:29:40,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:29:40,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:29:40,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:29:40,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:29:40,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:29:40,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:29:40,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:29:40,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:29:40,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:29:40,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:29:40,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:29:40,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:29:40,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:29:40,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:29:40,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:29:40,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:29:40,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:29:40,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:29:40,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:29:40,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:29:40,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:29:40,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:29:40,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:29:40,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:29:40,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:29:40,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:29:40,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:29:40,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:29:40,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:29:40,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:29:40,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:29:40,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:29:40,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:29:40,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:29:40,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:29:40,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:29:40,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:29:40,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 04:29:40,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:29:40,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:29:40,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:29:40,357 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:29:40,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:29:40,358 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:29:40,358 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:29:40,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:29:40,358 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:29:40,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:29:40,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:29:40,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:29:40,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:29:40,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:29:40,362 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:29:40,362 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:29:40,362 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:29:40,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:29:40,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:29:40,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:29:40,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:29:40,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:29:40,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:29:40,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:29:40,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:29:40,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:29:40,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:29:40,365 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:29:40,365 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:29:40,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:29:40,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:29:40,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:29:40,366 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_855bb4b8-3913-4c4c-af52-7c39ff163958/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-03 04:29:40,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:29:40,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:29:40,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:29:40,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:29:40,783 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:29:40,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-03 04:29:40,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/fc1f5f92b/310d9ffcf27a4f30babdb24fcfa0ae8f/FLAG0f12b5590 [2021-11-03 04:29:41,641 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:29:41,642 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-03 04:29:41,684 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/fc1f5f92b/310d9ffcf27a4f30babdb24fcfa0ae8f/FLAG0f12b5590 [2021-11-03 04:29:41,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/data/fc1f5f92b/310d9ffcf27a4f30babdb24fcfa0ae8f [2021-11-03 04:29:41,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:29:41,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:29:41,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:29:41,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:29:41,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:29:41,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:41" (1/1) ... [2021-11-03 04:29:41,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdc5cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:41, skipping insertion in model container [2021-11-03 04:29:41,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:41" (1/1) ... [2021-11-03 04:29:41,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:29:41,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:29:42,207 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-03 04:29:42,213 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-03 04:29:42,233 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:29:42,237 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:29:43,242 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,243 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,244 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,245 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,246 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,279 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,280 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,282 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,283 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,285 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,287 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,288 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,288 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:43,696 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:29:43,697 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:29:43,699 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:29:43,700 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:29:43,702 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:29:43,703 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:29:43,704 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:29:43,705 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:29:43,714 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:29:43,717 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:29:43,994 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:29:44,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:29:44,066 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:29:44,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:29:44,111 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-03 04:29:44,112 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-03 04:29:44,114 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:29:44,115 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:29:44,198 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,199 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,200 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,203 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,204 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,219 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,220 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,222 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,223 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,224 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,225 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,225 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,226 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,329 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:29:44,330 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:29:44,331 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:29:44,332 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:29:44,338 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:29:44,338 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:29:44,339 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:29:44,339 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:29:44,340 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:29:44,340 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:29:44,377 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:29:44,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:29:44,432 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:29:44,459 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-03 04:29:44,459 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_855bb4b8-3913-4c4c-af52-7c39ff163958/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-03 04:29:44,460 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 04:29:44,461 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 04:29:44,489 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,489 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,490 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,490 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,491 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,496 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,496 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,497 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,498 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,498 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,499 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,499 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,500 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 04:29:44,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 04:29:44,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 04:29:44,554 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 04:29:44,554 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 04:29:44,555 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 04:29:44,556 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 04:29:44,556 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 04:29:44,556 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 04:29:44,557 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 04:29:44,557 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 04:29:44,576 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 04:29:44,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:29:44,817 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:29:44,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44 WrapperNode [2021-11-03 04:29:44,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:29:44,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:29:44,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:29:44,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:29:44,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:44,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:44,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:29:44,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:29:44,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:29:44,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:29:45,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:29:45,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:29:45,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:29:45,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:29:45,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (1/1) ... [2021-11-03 04:29:45,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:29:45,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:45,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:29:45,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:29:45,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:29:45,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:29:45,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:29:45,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:29:45,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:29:45,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:29:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:29:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:29:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 04:29:46,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:29:46,976 INFO L299 CfgBuilder]: Removed 138 assume(true) statements. [2021-11-03 04:29:46,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:29:46 BoogieIcfgContainer [2021-11-03 04:29:46,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:29:46,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:29:46,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:29:46,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:29:46,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:29:41" (1/3) ... [2021-11-03 04:29:46,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372b925f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:29:46, skipping insertion in model container [2021-11-03 04:29:46,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:44" (2/3) ... [2021-11-03 04:29:46,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372b925f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:29:46, skipping insertion in model container [2021-11-03 04:29:46,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:29:46" (3/3) ... [2021-11-03 04:29:46,986 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-03 04:29:46,991 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:29:46,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-03 04:29:47,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:29:47,044 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 04:29:47,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-03 04:29:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 252 states have (on average 1.5674603174603174) internal successors, (395), 266 states have internal predecessors, (395), 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 04:29:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:29:47,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:47,074 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, 1, 1, 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 04:29:47,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2109692067, now seen corresponding path program 1 times [2021-11-03 04:29:47,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:47,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807746270] [2021-11-03 04:29:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:47,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:47,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:47,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:47,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:29:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:29:47,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:47,710 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 04:29:47,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:47,890 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 04:29:47,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:47,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807746270] [2021-11-03 04:29:47,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807746270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:47,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:47,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:29:47,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779493474] [2021-11-03 04:29:47,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:29:47,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:47,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:29:47,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:29:47,928 INFO L87 Difference]: Start difference. First operand has 267 states, 252 states have (on average 1.5674603174603174) internal successors, (395), 266 states have internal predecessors, (395), 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 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 04:29:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:47,999 INFO L93 Difference]: Finished difference Result 530 states and 785 transitions. [2021-11-03 04:29:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:29:48,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 53 [2021-11-03 04:29:48,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:48,024 INFO L225 Difference]: With dead ends: 530 [2021-11-03 04:29:48,024 INFO L226 Difference]: Without dead ends: 260 [2021-11-03 04:29:48,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 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 04:29:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-03 04:29:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-03 04:29:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 246 states have (on average 1.4308943089430894) internal successors, (352), 259 states have internal predecessors, (352), 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 04:29:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 352 transitions. [2021-11-03 04:29:48,120 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 352 transitions. Word has length 53 [2021-11-03 04:29:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:48,120 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 352 transitions. [2021-11-03 04:29:48,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 04:29:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 352 transitions. [2021-11-03 04:29:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:29:48,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:48,125 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, 1, 1, 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 04:29:48,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:48,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:48,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1639619295, now seen corresponding path program 1 times [2021-11-03 04:29:48,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:48,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82618823] [2021-11-03 04:29:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:48,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:48,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:48,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:48,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:29:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:48,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:49,005 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 04:29:49,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:49,209 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 04:29:49,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:49,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82618823] [2021-11-03 04:29:49,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82618823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:49,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:49,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:29:49,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817784265] [2021-11-03 04:29:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:29:49,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:29:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:29:49,216 INFO L87 Difference]: Start difference. First operand 260 states and 352 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 04:29:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:49,733 INFO L93 Difference]: Finished difference Result 563 states and 782 transitions. [2021-11-03 04:29:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:29:49,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-03 04:29:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:49,738 INFO L225 Difference]: With dead ends: 563 [2021-11-03 04:29:49,738 INFO L226 Difference]: Without dead ends: 324 [2021-11-03 04:29:49,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-03 04:29:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 276. [2021-11-03 04:29:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 262 states have (on average 1.4045801526717556) internal successors, (368), 275 states have internal predecessors, (368), 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 04:29:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 368 transitions. [2021-11-03 04:29:49,754 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 368 transitions. Word has length 53 [2021-11-03 04:29:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:49,755 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 368 transitions. [2021-11-03 04:29:49,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 04:29:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 368 transitions. [2021-11-03 04:29:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:29:49,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:49,758 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, 1, 1, 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 04:29:49,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:49,979 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 795613793, now seen corresponding path program 1 times [2021-11-03 04:29:49,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:49,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348375572] [2021-11-03 04:29:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:49,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:49,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:49,983 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:50,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:29:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:29:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:50,562 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 04:29:50,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:50,710 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 04:29:50,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:50,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348375572] [2021-11-03 04:29:50,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348375572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:50,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:50,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:29:50,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882165996] [2021-11-03 04:29:50,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:29:50,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:29:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:50,714 INFO L87 Difference]: Start difference. First operand 276 states and 368 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 04:29:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:51,334 INFO L93 Difference]: Finished difference Result 583 states and 801 transitions. [2021-11-03 04:29:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:29:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 53 [2021-11-03 04:29:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:51,338 INFO L225 Difference]: With dead ends: 583 [2021-11-03 04:29:51,338 INFO L226 Difference]: Without dead ends: 332 [2021-11-03 04:29:51,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 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 04:29:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-03 04:29:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 300. [2021-11-03 04:29:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 286 states have (on average 1.3706293706293706) internal successors, (392), 299 states have internal predecessors, (392), 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 04:29:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 392 transitions. [2021-11-03 04:29:51,352 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 392 transitions. Word has length 53 [2021-11-03 04:29:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:51,352 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 392 transitions. [2021-11-03 04:29:51,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 04:29:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 392 transitions. [2021-11-03 04:29:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:29:51,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:51,365 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, 1, 1, 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 04:29:51,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:51,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:51,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash 725074277, now seen corresponding path program 1 times [2021-11-03 04:29:51,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:51,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658650938] [2021-11-03 04:29:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:51,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:51,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:51,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:51,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:29:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:29:51,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:52,086 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 04:29:52,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:52,208 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 04:29:52,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:52,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658650938] [2021-11-03 04:29:52,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658650938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:52,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:52,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:29:52,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703670107] [2021-11-03 04:29:52,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:29:52,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:52,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:29:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:29:52,211 INFO L87 Difference]: Start difference. First operand 300 states and 392 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 04:29:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:52,418 INFO L93 Difference]: Finished difference Result 642 states and 814 transitions. [2021-11-03 04:29:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:29:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-03 04:29:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:52,421 INFO L225 Difference]: With dead ends: 642 [2021-11-03 04:29:52,421 INFO L226 Difference]: Without dead ends: 370 [2021-11-03 04:29:52,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-03 04:29:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 290. [2021-11-03 04:29:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 276 states have (on average 1.355072463768116) internal successors, (374), 289 states have internal predecessors, (374), 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 04:29:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 374 transitions. [2021-11-03 04:29:52,430 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 374 transitions. Word has length 53 [2021-11-03 04:29:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:52,431 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 374 transitions. [2021-11-03 04:29:52,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 04:29:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 374 transitions. [2021-11-03 04:29:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:29:52,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:52,433 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, 1, 1, 1, 1, 1, 1, 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 04:29:52,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:52,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:52,647 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1019459681, now seen corresponding path program 1 times [2021-11-03 04:29:52,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:52,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58857627] [2021-11-03 04:29:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:52,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:52,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:52,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:29:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:29:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:53,400 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 04:29:53,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:53,607 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 04:29:53,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:53,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58857627] [2021-11-03 04:29:53,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58857627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:53,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:53,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:29:53,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70325756] [2021-11-03 04:29:53,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:29:53,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:29:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:53,609 INFO L87 Difference]: Start difference. First operand 290 states and 374 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 04:29:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:54,163 INFO L93 Difference]: Finished difference Result 600 states and 764 transitions. [2021-11-03 04:29:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:29:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 57 [2021-11-03 04:29:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:54,168 INFO L225 Difference]: With dead ends: 600 [2021-11-03 04:29:54,168 INFO L226 Difference]: Without dead ends: 344 [2021-11-03 04:29:54,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 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 04:29:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-03 04:29:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 290. [2021-11-03 04:29:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 276 states have (on average 1.3478260869565217) internal successors, (372), 289 states have internal predecessors, (372), 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 04:29:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 372 transitions. [2021-11-03 04:29:54,183 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 372 transitions. Word has length 57 [2021-11-03 04:29:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:54,184 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 372 transitions. [2021-11-03 04:29:54,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 04:29:54,184 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 372 transitions. [2021-11-03 04:29:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:29:54,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:54,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:29:54,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:54,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:54,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1178542337, now seen corresponding path program 1 times [2021-11-03 04:29:54,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:54,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182179310] [2021-11-03 04:29:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:54,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:54,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:54,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:54,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:29:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:29:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:55,220 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 04:29:55,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:55,398 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 04:29:55,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:55,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182179310] [2021-11-03 04:29:55,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182179310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:55,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:55,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 04:29:55,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297806510] [2021-11-03 04:29:55,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:29:55,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:55,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:29:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:29:55,403 INFO L87 Difference]: Start difference. First operand 290 states and 372 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 04:29:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:55,974 INFO L93 Difference]: Finished difference Result 686 states and 863 transitions. [2021-11-03 04:29:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:29:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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) Word has length 59 [2021-11-03 04:29:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:55,978 INFO L225 Difference]: With dead ends: 686 [2021-11-03 04:29:55,978 INFO L226 Difference]: Without dead ends: 429 [2021-11-03 04:29:55,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:29:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-03 04:29:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 292. [2021-11-03 04:29:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 278 states have (on average 1.3453237410071943) internal successors, (374), 291 states have internal predecessors, (374), 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 04:29:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 374 transitions. [2021-11-03 04:29:55,990 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 374 transitions. Word has length 59 [2021-11-03 04:29:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:55,991 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 374 transitions. [2021-11-03 04:29:55,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 04:29:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 374 transitions. [2021-11-03 04:29:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:29:55,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:55,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:29:56,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:56,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:56,215 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1951801708, now seen corresponding path program 1 times [2021-11-03 04:29:56,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:56,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601249840] [2021-11-03 04:29:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:56,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:56,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:56,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:56,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:29:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:29:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:56,840 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 04:29:56,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:56,996 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 04:29:56,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:56,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601249840] [2021-11-03 04:29:56,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601249840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:56,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:56,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 3] imperfect sequences [] total 7 [2021-11-03 04:29:56,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819333431] [2021-11-03 04:29:56,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:29:56,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:29:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:29:56,998 INFO L87 Difference]: Start difference. First operand 292 states and 374 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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 04:29:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:58,161 INFO L93 Difference]: Finished difference Result 1033 states and 1297 transitions. [2021-11-03 04:29:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:29:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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 60 [2021-11-03 04:29:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:58,168 INFO L225 Difference]: With dead ends: 1033 [2021-11-03 04:29:58,168 INFO L226 Difference]: Without dead ends: 775 [2021-11-03 04:29:58,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:29:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-11-03 04:29:58,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 306. [2021-11-03 04:29:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 292 states have (on average 1.3493150684931507) internal successors, (394), 305 states have internal predecessors, (394), 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 04:29:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 394 transitions. [2021-11-03 04:29:58,194 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 394 transitions. Word has length 60 [2021-11-03 04:29:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:58,195 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 394 transitions. [2021-11-03 04:29:58,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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 04:29:58,197 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 394 transitions. [2021-11-03 04:29:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 04:29:58,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:58,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:29:58,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:58,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:58,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:29:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1906919633, now seen corresponding path program 1 times [2021-11-03 04:29:58,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:58,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297756111] [2021-11-03 04:29:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:58,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:58,416 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:58,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:29:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:59,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:29:59,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:59,749 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 04:29:59,754 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 04:29:59,941 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 04:29:59,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:00,385 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 04:30:00,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:00,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297756111] [2021-11-03 04:30:00,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297756111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:00,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:00,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-03 04:30:00,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292214769] [2021-11-03 04:30:00,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 04:30:00,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 04:30:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:30:00,388 INFO L87 Difference]: Start difference. First operand 306 states and 394 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 04:30:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:20,292 INFO L93 Difference]: Finished difference Result 2017 states and 2424 transitions. [2021-11-03 04:30:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-03 04:30:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 65 [2021-11-03 04:30:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:20,304 INFO L225 Difference]: With dead ends: 2017 [2021-11-03 04:30:20,304 INFO L226 Difference]: Without dead ends: 1738 [2021-11-03 04:30:20,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-11-03 04:30:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-11-03 04:30:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 330. [2021-11-03 04:30:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 316 states have (on average 1.3481012658227849) internal successors, (426), 329 states have internal predecessors, (426), 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 04:30:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 426 transitions. [2021-11-03 04:30:20,336 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 426 transitions. Word has length 65 [2021-11-03 04:30:20,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:20,337 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 426 transitions. [2021-11-03 04:30:20,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 04:30:20,337 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 426 transitions. [2021-11-03 04:30:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 04:30:20,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:20,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:20,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:20,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:20,548 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:30:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash -877560335, now seen corresponding path program 1 times [2021-11-03 04:30:20,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:20,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744937495] [2021-11-03 04:30:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:20,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:20,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:20,551 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:20,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:30:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:21,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:30:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:21,329 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 04:30:21,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:21,482 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 04:30:21,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:21,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744937495] [2021-11-03 04:30:21,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744937495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:21,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:21,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:30:21,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871569913] [2021-11-03 04:30:21,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:30:21,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:21,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:30:21,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:30:21,485 INFO L87 Difference]: Start difference. First operand 330 states and 426 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 04:30:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:21,911 INFO L93 Difference]: Finished difference Result 855 states and 1065 transitions. [2021-11-03 04:30:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:30:21,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-11-03 04:30:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:21,915 INFO L225 Difference]: With dead ends: 855 [2021-11-03 04:30:21,915 INFO L226 Difference]: Without dead ends: 561 [2021-11-03 04:30:21,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:30:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-03 04:30:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 330. [2021-11-03 04:30:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 316 states have (on average 1.3386075949367089) internal successors, (423), 329 states have internal predecessors, (423), 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 04:30:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 423 transitions. [2021-11-03 04:30:21,937 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 423 transitions. Word has length 65 [2021-11-03 04:30:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:21,937 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 423 transitions. [2021-11-03 04:30:21,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 04:30:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 423 transitions. [2021-11-03 04:30:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:30:21,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:21,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:21,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:22,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:22,155 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:30:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1143795921, now seen corresponding path program 1 times [2021-11-03 04:30:22,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:22,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502945361] [2021-11-03 04:30:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:22,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:22,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:22,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:22,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:30:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:22,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:30:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:23,131 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 04:30:23,135 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 04:30:23,241 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 04:30:23,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:23,613 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 04:30:23,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:23,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502945361] [2021-11-03 04:30:23,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502945361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:23,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1103559577] [2021-11-03 04:30:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:23,614 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:23,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:30:23,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:30:23,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-03 04:30:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:24,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:30:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:30:24,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:30:24,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1103559577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:24,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:30:24,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8, 8] total 12 [2021-11-03 04:30:24,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342731303] [2021-11-03 04:30:24,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:30:24,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:30:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:30:24,515 INFO L87 Difference]: Start difference. First operand 330 states and 423 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 04:30:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:24,764 INFO L93 Difference]: Finished difference Result 705 states and 894 transitions. [2021-11-03 04:30:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:30:24,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 69 [2021-11-03 04:30:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:24,770 INFO L225 Difference]: With dead ends: 705 [2021-11-03 04:30:24,770 INFO L226 Difference]: Without dead ends: 390 [2021-11-03 04:30:24,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:30:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-03 04:30:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 342. [2021-11-03 04:30:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 328 states have (on average 1.3201219512195121) internal successors, (433), 341 states have internal predecessors, (433), 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 04:30:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 433 transitions. [2021-11-03 04:30:24,789 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 433 transitions. Word has length 69 [2021-11-03 04:30:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:24,790 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 433 transitions. [2021-11-03 04:30:24,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 04:30:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 433 transitions. [2021-11-03 04:30:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:30:24,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:24,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:24,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:25,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:25,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:25,199 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:30:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash 869036307, now seen corresponding path program 1 times [2021-11-03 04:30:25,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:25,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858380859] [2021-11-03 04:30:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:25,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:25,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:25,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:25,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:30:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:30:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:26,325 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 04:30:26,329 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 04:30:26,445 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 04:30:26,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:26,799 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 04:30:26,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:26,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858380859] [2021-11-03 04:30:26,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858380859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:26,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492982458] [2021-11-03 04:30:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:26,800 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:26,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:30:26,801 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:30:26,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 04:30:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:30:27,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:30:27,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:30:27,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492982458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:27,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:30:27,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 14 [2021-11-03 04:30:27,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029667333] [2021-11-03 04:30:27,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:30:27,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:30:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:30:27,859 INFO L87 Difference]: Start difference. First operand 342 states and 433 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 04:30:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:28,359 INFO L93 Difference]: Finished difference Result 1057 states and 1285 transitions. [2021-11-03 04:30:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:30:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 69 [2021-11-03 04:30:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:28,363 INFO L225 Difference]: With dead ends: 1057 [2021-11-03 04:30:28,364 INFO L226 Difference]: Without dead ends: 749 [2021-11-03 04:30:28,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:30:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-03 04:30:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 342. [2021-11-03 04:30:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 328 states have (on average 1.3109756097560976) internal successors, (430), 341 states have internal predecessors, (430), 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 04:30:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 430 transitions. [2021-11-03 04:30:28,385 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 430 transitions. Word has length 69 [2021-11-03 04:30:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:28,385 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 430 transitions. [2021-11-03 04:30:28,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 04:30:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 430 transitions. [2021-11-03 04:30:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:30:28,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:28,387 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:28,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:28,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:28,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:28,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:30:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:28,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1498389026, now seen corresponding path program 1 times [2021-11-03 04:30:28,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:28,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935197830] [2021-11-03 04:30:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:28,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:28,809 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:28,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:30:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:30:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:29,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:29,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:29,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935197830] [2021-11-03 04:30:29,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935197830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:29,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:29,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-03 04:30:29,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010134792] [2021-11-03 04:30:29,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:30:29,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:30:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:30:29,987 INFO L87 Difference]: Start difference. First operand 342 states and 430 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 04:30:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:32,259 INFO L93 Difference]: Finished difference Result 876 states and 1084 transitions. [2021-11-03 04:30:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:30:32,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 79 [2021-11-03 04:30:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:32,264 INFO L225 Difference]: With dead ends: 876 [2021-11-03 04:30:32,264 INFO L226 Difference]: Without dead ends: 591 [2021-11-03 04:30:32,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:30:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-03 04:30:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 342. [2021-11-03 04:30:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 328 states have (on average 1.2896341463414633) internal successors, (423), 341 states have internal predecessors, (423), 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 04:30:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 423 transitions. [2021-11-03 04:30:32,295 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 423 transitions. Word has length 79 [2021-11-03 04:30:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:32,296 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 423 transitions. [2021-11-03 04:30:32,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 04:30:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 423 transitions. [2021-11-03 04:30:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:30:32,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:32,298 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:30:32,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:32,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:32,521 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:30:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:32,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1475756772, now seen corresponding path program 1 times [2021-11-03 04:30:32,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:32,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488080567] [2021-11-03 04:30:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:32,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:32,524 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:32,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:30:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 04:30:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:34,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:34,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:34,900 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 04:30:34,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:34,926 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 04:30:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:35,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:35,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488080567] [2021-11-03 04:30:35,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488080567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:35,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1458586262] [2021-11-03 04:30:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:35,488 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:35,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:30:35,494 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:30:35,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:30:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:36,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:30:36,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:38,197 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 17 treesize of output 9 [2021-11-03 04:30:38,213 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 15 treesize of output 7 [2021-11-03 04:30:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:38,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:39,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:39,686 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 04:30:39,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:39,711 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 04:30:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:40,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1458586262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:40,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68241268] [2021-11-03 04:30:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:40,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:40,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:40,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:30:40,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:30:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:41,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 04:30:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:42,322 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 17 treesize of output 9 [2021-11-03 04:30:42,330 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 15 treesize of output 7 [2021-11-03 04:30:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:42,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:43,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:43,072 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 04:30:43,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:43,104 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 04:30:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:30:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68241268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:43,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:30:43,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9, 8, 9, 8] total 33 [2021-11-03 04:30:43,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476681082] [2021-11-03 04:30:43,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-03 04:30:43,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-03 04:30:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 04:30:43,495 INFO L87 Difference]: Start difference. First operand 342 states and 423 transitions. Second operand has 33 states, 33 states have (on average 7.878787878787879) internal successors, (260), 33 states have internal predecessors, (260), 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 04:31:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:54,134 INFO L93 Difference]: Finished difference Result 7053 states and 8235 transitions. [2021-11-03 04:31:54,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-11-03 04:31:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 7.878787878787879) internal successors, (260), 33 states have internal predecessors, (260), 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 79 [2021-11-03 04:31:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:54,174 INFO L225 Difference]: With dead ends: 7053 [2021-11-03 04:31:54,174 INFO L226 Difference]: Without dead ends: 6830 [2021-11-03 04:31:54,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15500 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=4675, Invalid=37555, Unknown=0, NotChecked=0, Total=42230 [2021-11-03 04:31:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6830 states. [2021-11-03 04:31:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6830 to 455. [2021-11-03 04:31:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.2675736961451247) internal successors, (559), 454 states have internal predecessors, (559), 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 04:31:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 559 transitions. [2021-11-03 04:31:54,322 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 559 transitions. Word has length 79 [2021-11-03 04:31:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:54,322 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 559 transitions. [2021-11-03 04:31:54,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.878787878787879) internal successors, (260), 33 states have internal predecessors, (260), 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 04:31:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 559 transitions. [2021-11-03 04:31:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:31:54,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:54,325 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:54,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 04:31:54,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:54,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-03 04:31:54,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:54,935 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:31:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 378673426, now seen corresponding path program 1 times [2021-11-03 04:31:54,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:54,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749274821] [2021-11-03 04:31:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:54,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:54,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:54,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:31:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:56,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:31:56,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:56,605 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 04:31:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:31:56,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:56,820 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 04:31:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:31:57,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:57,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749274821] [2021-11-03 04:31:57,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749274821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:57,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:57,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-03 04:31:57,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711723653] [2021-11-03 04:31:57,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 04:31:57,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 04:31:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:31:57,271 INFO L87 Difference]: Start difference. First operand 455 states and 559 transitions. Second operand has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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 04:32:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:00,636 INFO L93 Difference]: Finished difference Result 896 states and 1105 transitions. [2021-11-03 04:32:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:32:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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 79 [2021-11-03 04:32:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:00,641 INFO L225 Difference]: With dead ends: 896 [2021-11-03 04:32:00,641 INFO L226 Difference]: Without dead ends: 642 [2021-11-03 04:32:00,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:32:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-03 04:32:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 455. [2021-11-03 04:32:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.2630385487528344) internal successors, (557), 454 states have internal predecessors, (557), 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 04:32:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 557 transitions. [2021-11-03 04:32:00,702 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 557 transitions. Word has length 79 [2021-11-03 04:32:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:00,702 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 557 transitions. [2021-11-03 04:32:00,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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 04:32:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 557 transitions. [2021-11-03 04:32:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:32:00,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:00,704 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:00,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:00,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:00,928 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2078239348, now seen corresponding path program 1 times [2021-11-03 04:32:00,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:00,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927407780] [2021-11-03 04:32:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:00,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:00,930 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:00,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:32:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:02,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:32:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:02,327 INFO L354 Elim1Store]: treesize reduction 157, result has 15.1 percent of original size [2021-11-03 04:32:02,327 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 28 treesize of output 37 [2021-11-03 04:32:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:02,383 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 04:32:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:03,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:03,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:03,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927407780] [2021-11-03 04:32:03,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927407780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:03,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:03,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:32:03,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706537265] [2021-11-03 04:32:03,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:03,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:03,250 INFO L87 Difference]: Start difference. First operand 455 states and 557 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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 04:32:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:06,698 INFO L93 Difference]: Finished difference Result 704 states and 867 transitions. [2021-11-03 04:32:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:06,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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) Word has length 79 [2021-11-03 04:32:06,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:06,701 INFO L225 Difference]: With dead ends: 704 [2021-11-03 04:32:06,701 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 04:32:06,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:32:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 04:32:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 455. [2021-11-03 04:32:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.256235827664399) internal successors, (554), 454 states have internal predecessors, (554), 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 04:32:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 554 transitions. [2021-11-03 04:32:06,750 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 554 transitions. Word has length 79 [2021-11-03 04:32:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 554 transitions. [2021-11-03 04:32:06,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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 04:32:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 554 transitions. [2021-11-03 04:32:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:32:06,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:06,752 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:06,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 04:32:06,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:06,975 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:06,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2076392306, now seen corresponding path program 1 times [2021-11-03 04:32:06,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:06,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645020101] [2021-11-03 04:32:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:06,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:06,977 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:06,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:32:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:08,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:32:08,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:08,907 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-03 04:32:08,907 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 04:32:09,190 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:32:09,190 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 72 treesize of output 38 [2021-11-03 04:32:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:09,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:09,371 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 04:32:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:09,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:09,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645020101] [2021-11-03 04:32:09,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645020101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:09,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:09,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-11-03 04:32:09,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890070691] [2021-11-03 04:32:09,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:32:09,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:32:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:32:09,752 INFO L87 Difference]: Start difference. First operand 455 states and 554 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 04:32:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:14,834 INFO L93 Difference]: Finished difference Result 882 states and 1085 transitions. [2021-11-03 04:32:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:32:14,836 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 79 [2021-11-03 04:32:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:14,839 INFO L225 Difference]: With dead ends: 882 [2021-11-03 04:32:14,839 INFO L226 Difference]: Without dead ends: 636 [2021-11-03 04:32:14,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:32:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-03 04:32:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 455. [2021-11-03 04:32:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.251700680272109) internal successors, (552), 454 states have internal predecessors, (552), 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 04:32:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 552 transitions. [2021-11-03 04:32:14,904 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 552 transitions. Word has length 79 [2021-11-03 04:32:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:14,905 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 552 transitions. [2021-11-03 04:32:14,905 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 04:32:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 552 transitions. [2021-11-03 04:32:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:32:14,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:14,907 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:14,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:15,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:15,130 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash -301384944, now seen corresponding path program 1 times [2021-11-03 04:32:15,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:15,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539050289] [2021-11-03 04:32:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:15,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:15,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:15,133 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:15,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:32:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:16,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:32:16,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:16,982 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-03 04:32:16,982 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 04:32:17,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:17,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:17,047 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 04:32:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:17,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:17,491 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 04:32:17,506 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 04:32:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:17,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:17,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539050289] [2021-11-03 04:32:17,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539050289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:17,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:17,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-03 04:32:17,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140707194] [2021-11-03 04:32:17,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:32:17,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:17,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:32:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:32:17,643 INFO L87 Difference]: Start difference. First operand 455 states and 552 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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 04:32:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:20,369 INFO L93 Difference]: Finished difference Result 711 states and 868 transitions. [2021-11-03 04:32:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:20,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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 79 [2021-11-03 04:32:20,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:20,372 INFO L225 Difference]: With dead ends: 711 [2021-11-03 04:32:20,373 INFO L226 Difference]: Without dead ends: 461 [2021-11-03 04:32:20,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-03 04:32:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 455. [2021-11-03 04:32:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.2448979591836735) internal successors, (549), 454 states have internal predecessors, (549), 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 04:32:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 549 transitions. [2021-11-03 04:32:20,417 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 549 transitions. Word has length 79 [2021-11-03 04:32:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:20,417 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 549 transitions. [2021-11-03 04:32:20,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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 04:32:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 549 transitions. [2021-11-03 04:32:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:32:20,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:20,418 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:20,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:20,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:20,647 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1079738004, now seen corresponding path program 1 times [2021-11-03 04:32:20,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:20,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9477710] [2021-11-03 04:32:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:20,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:20,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:20,650 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:32:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:32:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:22,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:22,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:22,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9477710] [2021-11-03 04:32:22,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9477710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:22,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:22,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 04:32:22,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139126162] [2021-11-03 04:32:22,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:32:22,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:22,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:32:22,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:32:22,756 INFO L87 Difference]: Start difference. First operand 455 states and 549 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 04:32:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:24,665 INFO L93 Difference]: Finished difference Result 870 states and 1067 transitions. [2021-11-03 04:32:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:32:24,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 79 [2021-11-03 04:32:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:24,669 INFO L225 Difference]: With dead ends: 870 [2021-11-03 04:32:24,669 INFO L226 Difference]: Without dead ends: 612 [2021-11-03 04:32:24,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:32:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-03 04:32:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 437. [2021-11-03 04:32:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 423 states have (on average 1.2458628841607564) internal successors, (527), 436 states have internal predecessors, (527), 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 04:32:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 527 transitions. [2021-11-03 04:32:24,715 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 527 transitions. Word has length 79 [2021-11-03 04:32:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:24,715 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 527 transitions. [2021-11-03 04:32:24,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 04:32:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 527 transitions. [2021-11-03 04:32:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 04:32:24,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:24,716 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:24,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:24,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:24,920 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1446027407, now seen corresponding path program 1 times [2021-11-03 04:32:24,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:24,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088159925] [2021-11-03 04:32:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:24,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:24,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:24,922 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:24,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:32:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:32:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:26,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:26,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:26,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088159925] [2021-11-03 04:32:26,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088159925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:26,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:26,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 04:32:26,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307913861] [2021-11-03 04:32:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:32:26,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:32:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:26,912 INFO L87 Difference]: Start difference. First operand 437 states and 527 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 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 04:32:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:29,734 INFO L93 Difference]: Finished difference Result 1067 states and 1286 transitions. [2021-11-03 04:32:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:32:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 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 81 [2021-11-03 04:32:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:29,740 INFO L225 Difference]: With dead ends: 1067 [2021-11-03 04:32:29,740 INFO L226 Difference]: Without dead ends: 825 [2021-11-03 04:32:29,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:32:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-03 04:32:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 437. [2021-11-03 04:32:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 423 states have (on average 1.2387706855791962) internal successors, (524), 436 states have internal predecessors, (524), 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 04:32:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 524 transitions. [2021-11-03 04:32:29,798 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 524 transitions. Word has length 81 [2021-11-03 04:32:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:29,799 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 524 transitions. [2021-11-03 04:32:29,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 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 04:32:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 524 transitions. [2021-11-03 04:32:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:32:29,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:29,801 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:29,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:30,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:30,015 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1562028301, now seen corresponding path program 1 times [2021-11-03 04:32:30,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:30,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820404007] [2021-11-03 04:32:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:30,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:30,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:30,018 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:30,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:32:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:31,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:32:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:32,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:32:32,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:32,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820404007] [2021-11-03 04:32:32,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820404007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:32,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:32,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-03 04:32:32,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711190812] [2021-11-03 04:32:32,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:32:32,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:32:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:32,471 INFO L87 Difference]: Start difference. First operand 437 states and 524 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 04:32:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:36,242 INFO L93 Difference]: Finished difference Result 1380 states and 1648 transitions. [2021-11-03 04:32:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:32:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 83 [2021-11-03 04:32:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:36,248 INFO L225 Difference]: With dead ends: 1380 [2021-11-03 04:32:36,248 INFO L226 Difference]: Without dead ends: 1136 [2021-11-03 04:32:36,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:32:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-03 04:32:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 437. [2021-11-03 04:32:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 423 states have (on average 1.2316784869976358) internal successors, (521), 436 states have internal predecessors, (521), 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 04:32:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 521 transitions. [2021-11-03 04:32:36,313 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 521 transitions. Word has length 83 [2021-11-03 04:32:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:36,313 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 521 transitions. [2021-11-03 04:32:36,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 04:32:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 521 transitions. [2021-11-03 04:32:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 04:32:36,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:36,315 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:36,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:36,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:36,522 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 215042257, now seen corresponding path program 1 times [2021-11-03 04:32:36,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:36,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41191117] [2021-11-03 04:32:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:36,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:36,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:36,527 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:36,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:32:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:37,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:32:38,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:32:38,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:32:38,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:38,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41191117] [2021-11-03 04:32:38,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41191117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:38,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:38,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:32:38,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630844449] [2021-11-03 04:32:38,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:38,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:38,378 INFO L87 Difference]: Start difference. First operand 437 states and 521 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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 04:32:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:38,695 INFO L93 Difference]: Finished difference Result 1016 states and 1204 transitions. [2021-11-03 04:32:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) Word has length 88 [2021-11-03 04:32:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:38,700 INFO L225 Difference]: With dead ends: 1016 [2021-11-03 04:32:38,700 INFO L226 Difference]: Without dead ends: 609 [2021-11-03 04:32:38,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-03 04:32:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 435. [2021-11-03 04:32:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 421 states have (on average 1.190023752969121) internal successors, (501), 434 states have internal predecessors, (501), 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 04:32:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 501 transitions. [2021-11-03 04:32:38,748 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 501 transitions. Word has length 88 [2021-11-03 04:32:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:38,748 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 501 transitions. [2021-11-03 04:32:38,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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 04:32:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 501 transitions. [2021-11-03 04:32:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 04:32:38,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:38,749 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:32:38,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:38,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:38,950 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 04:32:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash -486557617, now seen corresponding path program 1 times [2021-11-03 04:32:38,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:38,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565079757] [2021-11-03 04:32:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:38,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:38,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:38,953 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:38,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855bb4b8-3913-4c4c-af52-7c39ff163958/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:32:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-03 04:32:40,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-03 04:32:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:40,946 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-03 04:32:45,068 INFO L354 Elim1Store]: treesize reduction 101, result has 2.9 percent of original size [2021-11-03 04:32:45,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 81 [2021-11-03 04:32:45,144 INFO L354 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2021-11-03 04:32:45,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 42 [2021-11-03 04:32:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:45,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:45,357 WARN L207 SmtUtils]: Spent 1.89 m on a formula simplification. DAG size of input: 234 DAG size of output: 173 [2021-11-03 04:34:45,358 INFO L354 Elim1Store]: treesize reduction 1465, result has 54.6 percent of original size [2021-11-03 04:34:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 37 case distinctions, treesize of input 41513 treesize of output 35792