./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:01:36,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:01:36,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:01:36,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:01:36,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:01:36,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:01:36,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:01:36,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:01:36,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:01:36,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:01:36,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:01:36,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:01:36,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:01:36,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:01:36,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:01:36,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:01:36,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:01:36,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:01:36,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:01:36,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:01:36,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:01:36,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:01:36,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:01:36,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:01:36,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:01:36,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:01:36,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:01:36,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:01:36,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:01:36,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:01:36,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:01:36,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:01:36,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:01:36,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:01:36,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:01:36,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:01:36,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:01:36,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:01:36,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:01:36,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:01:36,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:01:36,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:01:36,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:01:36,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:01:36,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:01:36,784 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:01:36,784 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:01:36,784 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:01:36,784 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:01:36,785 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:01:36,785 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:01:36,785 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:01:36,785 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:01:36,785 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:01:36,786 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:01:36,786 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:01:36,786 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:01:36,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:01:36,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:01:36,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:01:36,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:01:36,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:01:36,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:01:36,788 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:01:36,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:01:36,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:01:36,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:01:36,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:01:36,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:01:36,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:01:36,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:01:36,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:01:36,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:01:36,790 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:01:36,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:01:36,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:01:36,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:01:36,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:01:36,791 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-03 05:01:37,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:01:37,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:01:37,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:01:37,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:01:37,108 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:01:37,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-03 05:01:37,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/b6cade587/5692ecd2b2d441f5b24e75852c83c6c9/FLAG6dbceb317 [2021-11-03 05:01:37,983 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:01:37,983 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-03 05:01:38,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/b6cade587/5692ecd2b2d441f5b24e75852c83c6c9/FLAG6dbceb317 [2021-11-03 05:01:38,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/b6cade587/5692ecd2b2d441f5b24e75852c83c6c9 [2021-11-03 05:01:38,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:01:38,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:01:38,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:01:38,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:01:38,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:01:38,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb0835c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38, skipping insertion in model container [2021-11-03 05:01:38,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:01:38,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:01:38,496 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-03 05:01:38,502 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-03 05:01:38,518 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:01:38,522 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:01:39,316 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,321 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,322 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,324 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,325 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,351 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,352 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,359 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,360 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,364 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,367 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,369 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,370 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:39,750 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:01:39,751 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:01:39,752 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:01:39,754 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:01:39,755 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:01:39,756 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:01:39,757 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:01:39,758 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:01:39,758 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:01:39,759 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:01:39,943 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:01:39,978 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 05:01:39,990 INFO L168 Benchmark]: Toolchain (without parser) took 1887.36 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 54.2 MB in the beginning and 79.4 MB in the end (delta: -25.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:01:39,992 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 94.4 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:01:39,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1883.19 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 54.2 MB in the beginning and 79.4 MB in the end (delta: -25.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:01:39,996 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 94.4 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1883.19 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 54.2 MB in the beginning and 79.4 MB in the end (delta: -25.2 MB). Peak memory consumption was 18.1 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:01:42,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:01:42,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:01:42,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:01:42,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:01:42,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:01:42,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:01:42,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:01:42,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:01:42,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:01:42,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:01:42,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:01:42,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:01:42,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:01:42,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:01:42,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:01:42,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:01:42,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:01:42,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:01:42,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:01:42,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:01:42,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:01:42,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:01:42,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:01:42,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:01:42,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:01:42,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:01:42,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:01:42,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:01:42,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:01:42,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:01:42,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:01:42,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:01:42,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:01:42,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:01:42,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:01:42,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:01:42,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:01:42,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:01:42,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:01:42,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:01:42,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:01:42,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:01:42,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:01:42,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:01:42,483 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:01:42,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:01:42,483 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:01:42,483 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:01:42,484 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:01:42,484 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:01:42,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:01:42,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:01:42,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:01:42,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:01:42,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:01:42,487 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:01:42,488 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:01:42,488 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:01:42,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:01:42,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:01:42,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:01:42,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:01:42,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:01:42,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:01:42,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:01:42,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:01:42,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:01:42,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:01:42,490 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:01:42,491 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:01:42,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:01:42,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:01:42,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:01:42,492 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-03 05:01:42,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:01:42,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:01:42,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:01:42,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:01:42,927 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:01:42,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-03 05:01:43,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/f26a76a04/57dd3c7d66314f74b34af3c965dd6d47/FLAG2a1ea213b [2021-11-03 05:01:43,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:01:43,865 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-03 05:01:43,905 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/f26a76a04/57dd3c7d66314f74b34af3c965dd6d47/FLAG2a1ea213b [2021-11-03 05:01:44,404 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/data/f26a76a04/57dd3c7d66314f74b34af3c965dd6d47 [2021-11-03 05:01:44,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:01:44,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:01:44,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:01:44,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:01:44,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:01:44,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:01:44" (1/1) ... [2021-11-03 05:01:44,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2852753a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:44, skipping insertion in model container [2021-11-03 05:01:44,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:01:44" (1/1) ... [2021-11-03 05:01:44,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:01:44,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:01:44,843 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-03 05:01:44,850 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-03 05:01:44,876 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:01:44,888 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:01:45,768 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,777 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,778 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,780 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,782 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,807 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,807 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,809 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,810 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,812 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,813 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,814 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:45,815 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:01:46,171 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:01:46,172 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:01:46,173 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:01:46,175 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:01:46,176 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:01:46,177 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:01:46,177 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:01:46,178 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:01:46,179 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:01:46,375 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:01:46,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:01:46,453 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:01:46,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:01:46,530 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-03 05:01:46,530 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-03 05:01:46,534 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:01:46,538 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:01:46,627 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,629 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,637 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,638 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,639 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,639 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,641 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,641 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,642 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,642 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,713 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:01:46,715 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:01:46,719 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:01:46,720 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:01:46,722 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:01:46,723 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:01:46,724 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:01:46,724 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:01:46,725 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:01:46,725 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:01:46,751 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:01:46,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:01:46,782 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:01:46,804 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4494,4507] [2021-11-03 05:01:46,811 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_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i[4554,4567] [2021-11-03 05:01:46,813 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:01:46,821 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:01:46,863 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,864 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,864 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,865 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,865 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,871 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,872 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,873 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,873 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,874 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,875 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:01:46,927 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:01:46,928 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:01:46,929 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:01:46,929 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:01:46,930 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:01:46,930 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:01:46,931 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:01:46,932 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:01:46,932 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:01:46,933 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:01:46,968 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:01:46,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:01:47,263 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:01:47,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47 WrapperNode [2021-11-03 05:01:47,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:01:47,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:01:47,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:01:47,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:01:47,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:01:47,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:01:47,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:01:47,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:01:47,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:01:47,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:01:47,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:01:47,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:01:47,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (1/1) ... [2021-11-03 05:01:47,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:01:47,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:01:47,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:01:47,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:01:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:01:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:01:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:01:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:01:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:01:47,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:01:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:01:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:01:47,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:01:48,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:01:48,625 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-03 05:01:48,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:01:48 BoogieIcfgContainer [2021-11-03 05:01:48,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:01:48,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:01:48,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:01:48,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:01:48,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:01:44" (1/3) ... [2021-11-03 05:01:48,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba693a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:01:48, skipping insertion in model container [2021-11-03 05:01:48,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:47" (2/3) ... [2021-11-03 05:01:48,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba693a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:01:48, skipping insertion in model container [2021-11-03 05:01:48,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:01:48" (3/3) ... [2021-11-03 05:01:48,634 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2021-11-03 05:01:48,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:01:48,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-03 05:01:48,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:01:48,713 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 05:01:48,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-03 05:01:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 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 05:01:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:01:48,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:48,757 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] [2021-11-03 05:01:48,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:48,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1861478915, now seen corresponding path program 1 times [2021-11-03 05:01:48,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:48,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138826778] [2021-11-03 05:01:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:48,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:48,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:48,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:48,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:01:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:01:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:49,218 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 05:01:49,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:49,336 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 05:01:49,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138826778] [2021-11-03 05:01:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138826778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:49,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:49,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:01:49,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500264414] [2021-11-03 05:01:49,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:01:49,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:01:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:01:49,361 INFO L87 Difference]: Start difference. First operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 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 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 05:01:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:49,388 INFO L93 Difference]: Finished difference Result 264 states and 379 transitions. [2021-11-03 05:01:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:01:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 40 [2021-11-03 05:01:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:49,399 INFO L225 Difference]: With dead ends: 264 [2021-11-03 05:01:49,400 INFO L226 Difference]: Without dead ends: 129 [2021-11-03 05:01:49,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 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 05:01:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-03 05:01:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-03 05:01:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 128 states have internal predecessors, (170), 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 05:01:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-11-03 05:01:49,449 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 40 [2021-11-03 05:01:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:49,450 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-11-03 05:01:49,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 05:01:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-11-03 05:01:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:01:49,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:49,452 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] [2021-11-03 05:01:49,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:49,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:49,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash -836812353, now seen corresponding path program 1 times [2021-11-03 05:01:49,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:49,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249724063] [2021-11-03 05:01:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:49,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:49,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:49,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:49,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:01:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:49,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:01:49,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:50,212 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 05:01:50,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:50,379 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 05:01:50,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:50,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249724063] [2021-11-03 05:01:50,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249724063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:50,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:50,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:01:50,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602101564] [2021-11-03 05:01:50,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:01:50,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:01:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:01:50,384 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 05:01:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:50,462 INFO L93 Difference]: Finished difference Result 243 states and 323 transitions. [2021-11-03 05:01:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:01:50,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 40 [2021-11-03 05:01:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:50,464 INFO L225 Difference]: With dead ends: 243 [2021-11-03 05:01:50,464 INFO L226 Difference]: Without dead ends: 129 [2021-11-03 05:01:50,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 05:01:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-03 05:01:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-03 05:01:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3770491803278688) internal successors, (168), 128 states have internal predecessors, (168), 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 05:01:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2021-11-03 05:01:50,477 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 40 [2021-11-03 05:01:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:50,478 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2021-11-03 05:01:50,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 05:01:50,478 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2021-11-03 05:01:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:01:50,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:50,480 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] [2021-11-03 05:01:50,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:50,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:50,697 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:50,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1534926909, now seen corresponding path program 1 times [2021-11-03 05:01:50,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:50,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002482178] [2021-11-03 05:01:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:50,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:50,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:50,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:50,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:01:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:01:50,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:51,119 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 05:01:51,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:51,253 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 05:01:51,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:51,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002482178] [2021-11-03 05:01:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002482178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:51,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:51,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:01:51,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009312637] [2021-11-03 05:01:51,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:01:51,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:01:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:01:51,256 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 05:01:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:51,346 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2021-11-03 05:01:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:01:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 40 [2021-11-03 05:01:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:51,352 INFO L225 Difference]: With dead ends: 275 [2021-11-03 05:01:51,352 INFO L226 Difference]: Without dead ends: 179 [2021-11-03 05:01:51,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 05:01:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-03 05:01:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2021-11-03 05:01:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3688524590163935) internal successors, (167), 128 states have internal predecessors, (167), 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 05:01:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2021-11-03 05:01:51,372 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 40 [2021-11-03 05:01:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:51,372 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2021-11-03 05:01:51,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 05:01:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2021-11-03 05:01:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:01:51,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:51,386 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:51,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:51,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:51,587 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash 199131234, now seen corresponding path program 1 times [2021-11-03 05:01:51,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:51,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204187758] [2021-11-03 05:01:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:51,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:51,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:51,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:01:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:01:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:52,101 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 05:01:52,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:52,261 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 05:01:52,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:52,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204187758] [2021-11-03 05:01:52,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204187758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:52,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:52,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:01:52,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840313512] [2021-11-03 05:01:52,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:01:52,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:01:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:01:52,266 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 05:01:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:52,449 INFO L93 Difference]: Finished difference Result 284 states and 361 transitions. [2021-11-03 05:01:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:01:52,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 42 [2021-11-03 05:01:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:52,453 INFO L225 Difference]: With dead ends: 284 [2021-11-03 05:01:52,453 INFO L226 Difference]: Without dead ends: 187 [2021-11-03 05:01:52,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 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 05:01:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-03 05:01:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-11-03 05:01:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 128 states have internal predecessors, (165), 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 05:01:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2021-11-03 05:01:52,465 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 42 [2021-11-03 05:01:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:52,466 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2021-11-03 05:01:52,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 05:01:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2021-11-03 05:01:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 05:01:52,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:52,478 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] [2021-11-03 05:01:52,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:52,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:52,686 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:52,687 INFO L85 PathProgramCache]: Analyzing trace with hash 496706596, now seen corresponding path program 1 times [2021-11-03 05:01:52,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:52,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835357956] [2021-11-03 05:01:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:52,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:52,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:52,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:52,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:01:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:01:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:53,174 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 05:01:53,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:53,315 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 05:01:53,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:53,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835357956] [2021-11-03 05:01:53,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835357956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:53,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:53,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 05:01:53,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955620448] [2021-11-03 05:01:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:01:53,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:53,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:01:53,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:01:53,317 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 05:01:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:53,626 INFO L93 Difference]: Finished difference Result 379 states and 479 transitions. [2021-11-03 05:01:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:01:53,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 44 [2021-11-03 05:01:53,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:53,629 INFO L225 Difference]: With dead ends: 379 [2021-11-03 05:01:53,629 INFO L226 Difference]: Without dead ends: 281 [2021-11-03 05:01:53,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 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 05:01:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-03 05:01:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 131. [2021-11-03 05:01:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.346774193548387) internal successors, (167), 130 states have internal predecessors, (167), 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 05:01:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-11-03 05:01:53,642 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 44 [2021-11-03 05:01:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-11-03 05:01:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 05:01:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-11-03 05:01:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 05:01:53,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:53,645 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] [2021-11-03 05:01:53,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:53,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:53,862 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:53,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1200660794, now seen corresponding path program 1 times [2021-11-03 05:01:53,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:53,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669888721] [2021-11-03 05:01:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:53,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:53,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:53,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:01:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:54,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:01:54,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:54,336 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 05:01:54,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:54,472 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 05:01:54,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:54,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669888721] [2021-11-03 05:01:54,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669888721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:54,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:54,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 3] imperfect sequences [] total 7 [2021-11-03 05:01:54,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998631427] [2021-11-03 05:01:54,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:01:54,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:01:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:01:54,475 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 05:01:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:55,003 INFO L93 Difference]: Finished difference Result 449 states and 563 transitions. [2021-11-03 05:01:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:01:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 45 [2021-11-03 05:01:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:55,008 INFO L225 Difference]: With dead ends: 449 [2021-11-03 05:01:55,008 INFO L226 Difference]: Without dead ends: 350 [2021-11-03 05:01:55,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 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 05:01:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-03 05:01:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 135. [2021-11-03 05:01:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 128 states have (on average 1.34375) internal successors, (172), 134 states have internal predecessors, (172), 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 05:01:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 172 transitions. [2021-11-03 05:01:55,028 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 172 transitions. Word has length 45 [2021-11-03 05:01:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:55,028 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 172 transitions. [2021-11-03 05:01:55,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 05:01:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 172 transitions. [2021-11-03 05:01:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:01:55,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:55,037 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] [2021-11-03 05:01:55,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:55,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:55,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1737555954, now seen corresponding path program 1 times [2021-11-03 05:01:55,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:55,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48113576] [2021-11-03 05:01:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:55,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:55,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:55,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:55,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:01:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:01:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:55,855 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 05:01:55,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:56,021 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 05:01:56,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48113576] [2021-11-03 05:01:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48113576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:56,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:56,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 05:01:56,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470821721] [2021-11-03 05:01:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:01:56,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:01:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:01:56,023 INFO L87 Difference]: Start difference. First operand 135 states and 172 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 05:01:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:56,432 INFO L93 Difference]: Finished difference Result 393 states and 496 transitions. [2021-11-03 05:01:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:01:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 50 [2021-11-03 05:01:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:56,435 INFO L225 Difference]: With dead ends: 393 [2021-11-03 05:01:56,435 INFO L226 Difference]: Without dead ends: 283 [2021-11-03 05:01:56,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:01:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-03 05:01:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 137. [2021-11-03 05:01:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.3384615384615384) internal successors, (174), 136 states have internal predecessors, (174), 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 05:01:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2021-11-03 05:01:56,448 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 50 [2021-11-03 05:01:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:56,448 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2021-11-03 05:01:56,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 05:01:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2021-11-03 05:01:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:01:56,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:56,450 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] [2021-11-03 05:01:56,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:56,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:56,667 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:56,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:56,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1675516340, now seen corresponding path program 1 times [2021-11-03 05:01:56,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:56,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683958323] [2021-11-03 05:01:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:56,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:56,669 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:56,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:01:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:01:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:57,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:57,257 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 05:01:57,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:57,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683958323] [2021-11-03 05:01:57,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683958323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:57,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:57,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:01:57,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183639412] [2021-11-03 05:01:57,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:01:57,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:01:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:01:57,260 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 05:01:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:57,368 INFO L93 Difference]: Finished difference Result 349 states and 432 transitions. [2021-11-03 05:01:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:01:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2021-11-03 05:01:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:57,370 INFO L225 Difference]: With dead ends: 349 [2021-11-03 05:01:57,371 INFO L226 Difference]: Without dead ends: 247 [2021-11-03 05:01:57,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 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 05:01:57,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-03 05:01:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 137. [2021-11-03 05:01:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 136 states have internal predecessors, (173), 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 05:01:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2021-11-03 05:01:57,381 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 50 [2021-11-03 05:01:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:57,381 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2021-11-03 05:01:57,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 05:01:57,382 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2021-11-03 05:01:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:01:57,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:57,382 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] [2021-11-03 05:01:57,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:57,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:57,596 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:01:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1963585782, now seen corresponding path program 1 times [2021-11-03 05:01:57,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:57,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061405297] [2021-11-03 05:01:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:57,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:57,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:57,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:01:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:57,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 05:01:58,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:58,512 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 05:01:58,519 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 05:01:58,596 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 05:01:58,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:58,923 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 05:01:58,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:58,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061405297] [2021-11-03 05:01:58,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061405297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:58,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1291115284] [2021-11-03 05:01:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:58,924 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:01:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:01:58,926 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:01:58,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 05:01:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:01:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:59,634 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 05:01:59,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:59,763 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 05:01:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1291115284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:59,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:01:59,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 14 [2021-11-03 05:01:59,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627978104] [2021-11-03 05:01:59,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:01:59,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:01:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:01:59,766 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 05:01:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:59,981 INFO L93 Difference]: Finished difference Result 411 states and 504 transitions. [2021-11-03 05:01:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:01:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2021-11-03 05:01:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:59,985 INFO L225 Difference]: With dead ends: 411 [2021-11-03 05:01:59,985 INFO L226 Difference]: Without dead ends: 308 [2021-11-03 05:01:59,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 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 05:01:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-03 05:01:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 137. [2021-11-03 05:01:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.323076923076923) internal successors, (172), 136 states have internal predecessors, (172), 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 05:01:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 172 transitions. [2021-11-03 05:01:59,998 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 172 transitions. Word has length 52 [2021-11-03 05:02:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:00,000 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 172 transitions. [2021-11-03 05:02:00,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 05:02:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 172 transitions. [2021-11-03 05:02:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:02:00,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:00,002 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:02:00,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:00,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:00,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:00,405 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:02:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:00,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1322921012, now seen corresponding path program 1 times [2021-11-03 05:02:00,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:00,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580606699] [2021-11-03 05:02:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:00,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:00,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:00,407 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:00,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:02:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:02:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:01,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:02:01,765 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 32 treesize of output 27 [2021-11-03 05:02:01,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:02:01,773 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 21 treesize of output 16 [2021-11-03 05:02:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:01,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:02,846 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:02:02,846 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 35 [2021-11-03 05:02:02,860 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:02:02,861 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 31 treesize of output 23 [2021-11-03 05:02:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:02,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580606699] [2021-11-03 05:02:02,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580606699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:02:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1099206218] [2021-11-03 05:02:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:02,954 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:02:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:02:02,958 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:02:02,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 05:02:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:03,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 05:02:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:04,034 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 05:02:04,034 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 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-03 05:02:10,383 WARN L207 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-11-03 05:02:10,383 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-03 05:02:10,384 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 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-03 05:02:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:02:42,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:02:43,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1099206218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:43,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:02:43,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [11, 10] total 30 [2021-11-03 05:02:43,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783829129] [2021-11-03 05:02:43,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:02:43,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:43,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:02:43,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:02:43,768 INFO L87 Difference]: Start difference. First operand 137 states and 172 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 05:02:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:54,952 INFO L93 Difference]: Finished difference Result 211 states and 263 transitions. [2021-11-03 05:02:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:02:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 05:02:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:54,955 INFO L225 Difference]: With dead ends: 211 [2021-11-03 05:02:54,955 INFO L226 Difference]: Without dead ends: 139 [2021-11-03 05:02:54,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 05:02:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-03 05:02:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-11-03 05:02:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 137 states have internal predecessors, (173), 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 05:02:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 173 transitions. [2021-11-03 05:02:54,970 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 173 transitions. Word has length 53 [2021-11-03 05:02:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:54,970 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 173 transitions. [2021-11-03 05:02:54,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 05:02:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 173 transitions. [2021-11-03 05:02:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:02:54,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:54,972 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:02:54,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:55,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:55,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:02:55,387 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:02:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1324768054, now seen corresponding path program 1 times [2021-11-03 05:02:55,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:55,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730754657] [2021-11-03 05:02:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:55,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:55,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:55,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:55,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:02:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:02:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:56,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:02:56,652 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 32 treesize of output 27 [2021-11-03 05:02:56,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:02:56,658 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 21 treesize of output 16 [2021-11-03 05:02:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:56,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:57,664 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:02:57,664 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 35 [2021-11-03 05:02:57,685 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:02:57,685 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 31 treesize of output 23 [2021-11-03 05:02:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:57,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:57,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730754657] [2021-11-03 05:02:57,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730754657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:02:57,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639486159] [2021-11-03 05:02:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:57,761 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:02:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:02:57,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:02:57,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 05:02:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 05:02:58,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:58,927 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-03 05:02:58,927 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-03 05:02:59,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-03 05:02:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:02:59,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:00,352 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 210 treesize of output 198 [2021-11-03 05:03:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:03:00,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639486159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:00,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:03:00,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [11, 10] total 31 [2021-11-03 05:03:00,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984216951] [2021-11-03 05:03:00,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 05:03:00,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:00,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 05:03:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-11-03 05:03:00,651 INFO L87 Difference]: Start difference. First operand 138 states and 173 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 05:03:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:03,100 INFO L93 Difference]: Finished difference Result 405 states and 514 transitions. [2021-11-03 05:03:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:03:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 05:03:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:03,104 INFO L225 Difference]: With dead ends: 405 [2021-11-03 05:03:03,104 INFO L226 Difference]: Without dead ends: 288 [2021-11-03 05:03:03,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 05:03:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-03 05:03:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 144. [2021-11-03 05:03:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 1.3065693430656935) internal successors, (179), 143 states have internal predecessors, (179), 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 05:03:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2021-11-03 05:03:03,124 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 53 [2021-11-03 05:03:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:03,125 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2021-11-03 05:03:03,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 05:03:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2021-11-03 05:03:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:03:03,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:03,126 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:03,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:03,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:03,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:03:03,527 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:03:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1195191880, now seen corresponding path program 1 times [2021-11-03 05:03:03,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:03,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13145335] [2021-11-03 05:03:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:03,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:03,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:03,532 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:03,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:03:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:03:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:04,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:04,943 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 32 treesize of output 27 [2021-11-03 05:03:04,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:04,961 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 21 treesize of output 16 [2021-11-03 05:03:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:05,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:06,233 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:03:06,233 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 35 [2021-11-03 05:03:06,243 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:03:06,244 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 31 treesize of output 23 [2021-11-03 05:03:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:06,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:06,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13145335] [2021-11-03 05:03:06,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13145335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:03:06,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1342907206] [2021-11-03 05:03:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:06,321 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:03:06,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:03:06,322 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:03:06,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:03:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:07,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 05:03:07,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:07,620 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 05:03:07,620 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 05:03:07,717 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 05:03:07,718 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 05:03:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:03:31,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:03:32,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1342907206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:32,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:03:32,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 9] imperfect sequences [11, 10] total 33 [2021-11-03 05:03:32,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247788817] [2021-11-03 05:03:32,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 05:03:32,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 05:03:32,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 05:03:32,452 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 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 05:03:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:47,103 INFO L93 Difference]: Finished difference Result 422 states and 532 transitions. [2021-11-03 05:03:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 05:03:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 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 05:03:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:47,108 INFO L225 Difference]: With dead ends: 422 [2021-11-03 05:03:47,109 INFO L226 Difference]: Without dead ends: 331 [2021-11-03 05:03:47,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=297, Invalid=1865, Unknown=0, NotChecked=0, Total=2162 [2021-11-03 05:03:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-03 05:03:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 172. [2021-11-03 05:03:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 165 states have (on average 1.284848484848485) internal successors, (212), 171 states have internal predecessors, (212), 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 05:03:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2021-11-03 05:03:47,132 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 53 [2021-11-03 05:03:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:47,133 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2021-11-03 05:03:47,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 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 05:03:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2021-11-03 05:03:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:03:47,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:47,134 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:47,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:47,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 05:03:47,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:03:47,553 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:03:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash -515133510, now seen corresponding path program 1 times [2021-11-03 05:03:47,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:47,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031845524] [2021-11-03 05:03:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:47,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:47,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:47,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:47,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:03:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:03:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:49,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:49,324 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 32 treesize of output 27 [2021-11-03 05:03:49,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:49,332 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 21 treesize of output 16 [2021-11-03 05:03:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:49,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:50,278 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:03:50,278 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 35 [2021-11-03 05:03:50,298 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:03:50,299 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 31 treesize of output 23 [2021-11-03 05:03:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:50,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:50,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031845524] [2021-11-03 05:03:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031845524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:03:50,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [543881056] [2021-11-03 05:03:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:50,387 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:03:50,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:03:50,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:03:50,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:03:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-03 05:03:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:51,771 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 05:03:51,771 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 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-03 05:03:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:55,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:57,465 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 381 treesize of output 365 [2021-11-03 05:03:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:57,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [543881056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:03:57,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140055243] [2021-11-03 05:03:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:57,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:57,869 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:03:57,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 05:03:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:58,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:03:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-03 05:04:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:00,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:00,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:04:00,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 20 [2021-11-03 05:04:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140055243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:04:01,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:04:01,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12, 12, 11, 11] total 48 [2021-11-03 05:04:01,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110206204] [2021-11-03 05:04:01,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-03 05:04:01,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-03 05:04:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-11-03 05:04:01,676 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 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 05:04:33,929 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-11-03 05:04:46,664 WARN L207 SmtUtils]: Spent 12.27 s on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-11-03 05:04:56,701 WARN L207 SmtUtils]: Spent 9.47 s on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-11-03 05:05:06,941 WARN L207 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-11-03 05:05:15,804 WARN L207 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2021-11-03 05:05:24,796 WARN L207 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-11-03 05:05:39,952 WARN L207 SmtUtils]: Spent 14.22 s on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-11-03 05:05:48,636 WARN L207 SmtUtils]: Spent 8.29 s on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-11-03 05:05:56,864 WARN L207 SmtUtils]: Spent 7.71 s on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-11-03 05:06:08,373 WARN L207 SmtUtils]: Spent 10.86 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-11-03 05:06:25,093 WARN L207 SmtUtils]: Spent 16.29 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-11-03 05:06:40,062 WARN L207 SmtUtils]: Spent 13.96 s on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-11-03 05:06:52,411 WARN L207 SmtUtils]: Spent 11.29 s on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-11-03 05:07:06,685 WARN L207 SmtUtils]: Spent 12.90 s on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-11-03 05:07:18,080 WARN L207 SmtUtils]: Spent 10.79 s on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-11-03 05:07:33,528 WARN L207 SmtUtils]: Spent 14.96 s on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-11-03 05:07:51,057 WARN L207 SmtUtils]: Spent 16.92 s on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-11-03 05:08:16,683 WARN L207 SmtUtils]: Spent 16.25 s on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-11-03 05:08:34,515 WARN L207 SmtUtils]: Spent 17.33 s on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-11-03 05:08:50,201 WARN L207 SmtUtils]: Spent 15.13 s on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-11-03 05:09:09,003 WARN L207 SmtUtils]: Spent 17.99 s on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-11-03 05:09:29,170 WARN L207 SmtUtils]: Spent 11.02 s on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2021-11-03 05:09:43,844 WARN L207 SmtUtils]: Spent 14.19 s on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-11-03 05:09:53,522 WARN L207 SmtUtils]: Spent 8.52 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-11-03 05:10:07,514 WARN L207 SmtUtils]: Spent 13.47 s on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-11-03 05:10:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:08,485 INFO L93 Difference]: Finished difference Result 696 states and 842 transitions. [2021-11-03 05:10:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-03 05:10:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 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 05:10:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:08,492 INFO L225 Difference]: With dead ends: 696 [2021-11-03 05:10:08,493 INFO L226 Difference]: Without dead ends: 573 [2021-11-03 05:10:08,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 349.4s TimeCoverageRelationStatistics Valid=1148, Invalid=5492, Unknown=2, NotChecked=0, Total=6642 [2021-11-03 05:10:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-03 05:10:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 201. [2021-11-03 05:10:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.268041237113402) internal successors, (246), 200 states have internal predecessors, (246), 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 05:10:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 246 transitions. [2021-11-03 05:10:08,527 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 246 transitions. Word has length 53 [2021-11-03 05:10:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:08,528 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 246 transitions. [2021-11-03 05:10:08,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 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 05:10:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 246 transitions. [2021-11-03 05:10:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:10:08,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:08,529 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:10:08,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:08,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-03 05:10:08,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-03 05:10:09,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:10:09,144 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:10:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1117845546, now seen corresponding path program 1 times [2021-11-03 05:10:09,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:09,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538324623] [2021-11-03 05:10:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:09,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:09,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:09,146 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:09,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:10:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:10,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:10:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:10:10,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:10:10,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:10,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538324623] [2021-11-03 05:10:10,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538324623] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:10,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:10,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:10:10,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005122238] [2021-11-03 05:10:10,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:10,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:10,403 INFO L87 Difference]: Start difference. First operand 201 states and 246 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 05:10:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:10,562 INFO L93 Difference]: Finished difference Result 419 states and 514 transitions. [2021-11-03 05:10:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-03 05:10:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:10,564 INFO L225 Difference]: With dead ends: 419 [2021-11-03 05:10:10,564 INFO L226 Difference]: Without dead ends: 265 [2021-11-03 05:10:10,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 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 05:10:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-03 05:10:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 201. [2021-11-03 05:10:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.2422680412371134) internal successors, (241), 200 states have internal predecessors, (241), 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 05:10:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 241 transitions. [2021-11-03 05:10:10,592 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 241 transitions. Word has length 61 [2021-11-03 05:10:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:10,592 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 241 transitions. [2021-11-03 05:10:10,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 05:10:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 241 transitions. [2021-11-03 05:10:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:10:10,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:10,593 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] [2021-11-03 05:10:10,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:10,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:10,810 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:10:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:10,811 INFO L85 PathProgramCache]: Analyzing trace with hash -268357848, now seen corresponding path program 2 times [2021-11-03 05:10:10,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:10,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721257652] [2021-11-03 05:10:10,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:10:10,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:10,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:10,812 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:10,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:10:11,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 05:10:11,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:10:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 05:10:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:12,457 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 05:10:12,460 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 05:10:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:10:12,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:13,107 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:10:13,107 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 32 treesize of output 31 [2021-11-03 05:10:13,115 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:10:13,116 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 27 treesize of output 19 [2021-11-03 05:10:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:10:13,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:13,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721257652] [2021-11-03 05:10:13,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721257652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:13,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:13,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 11 [2021-11-03 05:10:13,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920602225] [2021-11-03 05:10:13,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:10:13,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:10:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:10:13,146 INFO L87 Difference]: Start difference. First operand 201 states and 241 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 05:10:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:14,618 INFO L93 Difference]: Finished difference Result 500 states and 609 transitions. [2021-11-03 05:10:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:10:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 61 [2021-11-03 05:10:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:14,621 INFO L225 Difference]: With dead ends: 500 [2021-11-03 05:10:14,621 INFO L226 Difference]: Without dead ends: 390 [2021-11-03 05:10:14,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:10:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-03 05:10:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 273. [2021-11-03 05:10:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.2067669172932332) internal successors, (321), 272 states have internal predecessors, (321), 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 05:10:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 321 transitions. [2021-11-03 05:10:14,669 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 321 transitions. Word has length 61 [2021-11-03 05:10:14,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:14,669 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 321 transitions. [2021-11-03 05:10:14,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 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 05:10:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 321 transitions. [2021-11-03 05:10:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:10:14,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:14,670 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] [2021-11-03 05:10:14,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:14,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:14,871 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:10:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1297163236, now seen corresponding path program 1 times [2021-11-03 05:10:14,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:14,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478286953] [2021-11-03 05:10:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:14,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:14,873 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:14,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:10:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:15,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:10:15,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:10:16,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:10:16,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:16,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478286953] [2021-11-03 05:10:16,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478286953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:16,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:16,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:10:16,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451494450] [2021-11-03 05:10:16,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:16,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:16,143 INFO L87 Difference]: Start difference. First operand 273 states and 321 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 05:10:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:16,265 INFO L93 Difference]: Finished difference Result 386 states and 463 transitions. [2021-11-03 05:10:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:10:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 61 [2021-11-03 05:10:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:16,267 INFO L225 Difference]: With dead ends: 386 [2021-11-03 05:10:16,268 INFO L226 Difference]: Without dead ends: 204 [2021-11-03 05:10:16,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 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 05:10:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-03 05:10:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-03 05:10:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.2081218274111676) internal successors, (238), 203 states have internal predecessors, (238), 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 05:10:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2021-11-03 05:10:16,300 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 61 [2021-11-03 05:10:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:16,300 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2021-11-03 05:10:16,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 05:10:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2021-11-03 05:10:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:10:16,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:16,301 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] [2021-11-03 05:10:16,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:16,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:16,522 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:10:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1659914854, now seen corresponding path program 1 times [2021-11-03 05:10:16,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:16,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363405243] [2021-11-03 05:10:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:16,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:16,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:16,524 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:16,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:10:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:10:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:10:17,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:10:17,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:17,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363405243] [2021-11-03 05:10:17,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363405243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:17,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:17,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:10:17,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85355990] [2021-11-03 05:10:17,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:10:17,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:10:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:10:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:10:17,824 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 05:10:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:17,945 INFO L93 Difference]: Finished difference Result 317 states and 376 transitions. [2021-11-03 05:10:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:10:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 61 [2021-11-03 05:10:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:17,947 INFO L225 Difference]: With dead ends: 317 [2021-11-03 05:10:17,947 INFO L226 Difference]: Without dead ends: 167 [2021-11-03 05:10:17,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 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 05:10:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-03 05:10:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-11-03 05:10:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 157 states have (on average 1.2229299363057324) internal successors, (192), 163 states have internal predecessors, (192), 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 05:10:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2021-11-03 05:10:17,976 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 61 [2021-11-03 05:10:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:17,977 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2021-11-03 05:10:17,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 05:10:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2021-11-03 05:10:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:10:17,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:17,978 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] [2021-11-03 05:10:18,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:18,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:10:18,202 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:10:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:18,203 INFO L85 PathProgramCache]: Analyzing trace with hash -414228359, now seen corresponding path program 1 times [2021-11-03 05:10:18,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:10:18,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710183445] [2021-11-03 05:10:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:18,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:10:18,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:10:18,205 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:10:18,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:10:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-03 05:10:19,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:10:21,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:26,614 INFO L354 Elim1Store]: treesize reduction 25, result has 75.7 percent of original size [2021-11-03 05:10:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 121 [2021-11-03 05:10:26,945 INFO L354 Elim1Store]: treesize reduction 15, result has 77.6 percent of original size [2021-11-03 05:10:26,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 132 [2021-11-03 05:10:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:10:31,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:10:31,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710183445] [2021-11-03 05:10:31,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710183445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:10:31,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [704167005] [2021-11-03 05:10:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:31,730 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:10:31,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:10:31,734 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:10:31,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8f82109-4b59-4a8e-a2ac-a7c0503f3443/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 05:10:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-03 05:10:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:33,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:33,922 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 05:10:33,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:33,933 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 05:10:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:10:37,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:10:37,628 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-11-03 05:10:37,628 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 7 case distinctions, treesize of input 119 treesize of output 86 [2021-11-03 05:10:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:38,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:11:08,925 WARN L207 SmtUtils]: Spent 26.93 s on a formula simplification. DAG size of input: 234 DAG size of output: 161 [2021-11-03 05:11:08,925 INFO L354 Elim1Store]: treesize reduction 1704, result has 47.1 percent of original size [2021-11-03 05:11:08,926 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 20709 treesize of output 18555