./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_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_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/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_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/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_0bbbc315-5a14-47be-96db-b5ff82b981cc/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 edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:41:29,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:41:29,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:41:29,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:41:29,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:41:29,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:41:29,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:41:29,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:41:29,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:41:29,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:41:29,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:41:29,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:41:29,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:41:29,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:41:29,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:41:29,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:41:29,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:41:29,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:41:29,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:41:29,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:41:29,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:41:29,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:41:29,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:41:29,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:41:29,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:41:29,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:41:29,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:41:29,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:41:29,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:41:29,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:41:29,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:41:29,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:41:29,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:41:29,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:41:29,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:41:29,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:41:29,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:41:29,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:41:29,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:41:29,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:41:29,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:41:29,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:41:29,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:41:29,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:41:29,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:41:29,517 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:41:29,517 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:41:29,517 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:41:29,517 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:41:29,517 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:41:29,518 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:41:29,518 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:41:29,518 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:41:29,518 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:41:29,518 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:41:29,519 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:41:29,519 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:41:29,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:41:29,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:41:29,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:41:29,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:41:29,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:41:29,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:41:29,520 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:41:29,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:41:29,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:41:29,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:41:29,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:41:29,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:41:29,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:41:29,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:41:29,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:41:29,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:41:29,522 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:41:29,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:41:29,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:41:29,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:41:29,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:41:29,523 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-03 05:41:29,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:41:29,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:41:29,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:41:29,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:41:29,781 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:41:29,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-03 05:41:29,858 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/4fec0bbf2/efdc779dfdb240699f66768e1ce3b017/FLAG5eaed5f10 [2021-11-03 05:41:30,606 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:41:30,608 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-03 05:41:30,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/4fec0bbf2/efdc779dfdb240699f66768e1ce3b017/FLAG5eaed5f10 [2021-11-03 05:41:30,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/4fec0bbf2/efdc779dfdb240699f66768e1ce3b017 [2021-11-03 05:41:30,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:41:30,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:41:30,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:41:30,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:41:30,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:41:30,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:30" (1/1) ... [2021-11-03 05:41:30,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba3a818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:30, skipping insertion in model container [2021-11-03 05:41:30,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:30" (1/1) ... [2021-11-03 05:41:30,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:41:30,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:41:31,098 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-03 05:41:31,109 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-03 05:41:31,130 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:41:31,135 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:41:31,935 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,936 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,937 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,938 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,940 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,963 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,965 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,972 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,975 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,978 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,980 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,983 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:31,984 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:32,357 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:41:32,358 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:41:32,359 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:41:32,360 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:41:32,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:41:32,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:41:32,363 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:41:32,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:41:32,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:41:32,365 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:41:32,515 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:41:32,531 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 05:41:32,536 INFO L168 Benchmark]: Toolchain (without parser) took 1823.81 ms. Allocated memory is still 163.6 MB. Free memory was 122.4 MB in the beginning and 110.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:32,537 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory was 54.4 MB in the beginning and 54.4 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:41:32,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1819.34 ms. Allocated memory is still 163.6 MB. Free memory was 122.2 MB in the beginning and 110.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-03 05:41:32,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory was 54.4 MB in the beginning and 54.4 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1819.34 ms. Allocated memory is still 163.6 MB. Free memory was 122.2 MB in the beginning and 110.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 21.0 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/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_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/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_0bbbc315-5a14-47be-96db-b5ff82b981cc/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 edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:41:34,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:41:34,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:41:34,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:41:34,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:41:34,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:41:34,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:41:34,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:41:34,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:41:34,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:41:34,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:41:34,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:41:34,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:41:34,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:41:34,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:41:34,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:41:34,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:41:34,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:41:34,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:41:34,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:41:34,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:41:34,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:41:34,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:41:34,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:41:34,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:41:34,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:41:34,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:41:34,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:41:34,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:41:34,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:41:34,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:41:34,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:41:34,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:41:34,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:41:34,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:41:34,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:41:34,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:41:34,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:41:34,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:41:34,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:41:34,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:41:34,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:41:34,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:41:34,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:41:34,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:41:34,862 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:41:34,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:41:34,863 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:41:34,863 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:41:34,863 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:41:34,863 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:41:34,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:41:34,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:41:34,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:41:34,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:41:34,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:41:34,867 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:41:34,867 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:41:34,867 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:41:34,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:41:34,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:41:34,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:41:34,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:41:34,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:41:34,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:41:34,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:41:34,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:41:34,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:41:34,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:41:34,870 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:41:34,870 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:41:34,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:41:34,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:41:34,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:41:34,871 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-11-03 05:41:35,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:41:35,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:41:35,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:41:35,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:41:35,301 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:41:35,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-03 05:41:35,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/4553556dc/d4711de9e6594513949972f53b503239/FLAGe4cbc299e [2021-11-03 05:41:36,289 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:41:36,290 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-11-03 05:41:36,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/4553556dc/d4711de9e6594513949972f53b503239/FLAGe4cbc299e [2021-11-03 05:41:36,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/data/4553556dc/d4711de9e6594513949972f53b503239 [2021-11-03 05:41:36,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:41:36,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:41:36,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:41:36,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:41:36,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:41:36,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:36" (1/1) ... [2021-11-03 05:41:36,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec047d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:36, skipping insertion in model container [2021-11-03 05:41:36,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:41:36" (1/1) ... [2021-11-03 05:41:36,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:41:36,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:41:37,148 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-03 05:41:37,154 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-03 05:41:37,181 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:41:37,195 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:41:38,182 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,183 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,184 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,185 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,186 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,204 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,205 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,210 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,211 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,214 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,218 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,219 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,220 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,535 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:41:38,536 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:41:38,537 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:41:38,538 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:41:38,539 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:41:38,540 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:41:38,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:41:38,541 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:41:38,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:41:38,542 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:41:38,711 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:41:38,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:41:38,758 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:41:38,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:41:38,785 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-03 05:41:38,786 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-03 05:41:38,787 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:41:38,788 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:41:38,873 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,873 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,874 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,874 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,890 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,898 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,898 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,900 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,904 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,906 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,906 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,907 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,907 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:38,972 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:41:38,980 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:41:38,982 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:41:38,983 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:41:38,989 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:41:38,990 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:41:38,991 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:41:38,991 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:41:38,992 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:41:38,992 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:41:39,034 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:41:39,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:41:39,075 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:41:39,098 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2021-11-03 05:41:39,099 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_0bbbc315-5a14-47be-96db-b5ff82b981cc/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2021-11-03 05:41:39,110 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:41:39,111 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:41:39,144 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,145 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,145 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,145 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,146 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,153 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,153 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,154 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,154 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,155 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,156 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:41:39,209 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:41:39,210 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:41:39,210 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:41:39,211 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:41:39,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:41:39,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:41:39,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:41:39,213 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:41:39,213 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:41:39,214 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:41:39,232 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:41:39,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:41:39,507 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:41:39,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39 WrapperNode [2021-11-03 05:41:39,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:41:39,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:41:39,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:41:39,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:41:39,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:41:39,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:41:39,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:41:39,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:41:39,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:41:39,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:41:39,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:41:39,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:41:39,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (1/1) ... [2021-11-03 05:41:39,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:41:39,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:41:39,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:41:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:41:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:41:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:41:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:41:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:41:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:41:39,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:41:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:41:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:41:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:41:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:41:41,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:41:41,275 INFO L299 CfgBuilder]: Removed 119 assume(true) statements. [2021-11-03 05:41:41,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:41:41 BoogieIcfgContainer [2021-11-03 05:41:41,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:41:41,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:41:41,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:41:41,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:41:41,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:41:36" (1/3) ... [2021-11-03 05:41:41,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ce0e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:41:41, skipping insertion in model container [2021-11-03 05:41:41,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:41:39" (2/3) ... [2021-11-03 05:41:41,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ce0e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:41:41, skipping insertion in model container [2021-11-03 05:41:41,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:41:41" (3/3) ... [2021-11-03 05:41:41,285 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2021-11-03 05:41:41,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:41:41,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-03 05:41:41,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:41:41,382 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 05:41:41,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-03 05:41:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 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 05:41:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:41:41,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:41,422 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:41,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 170416363, now seen corresponding path program 1 times [2021-11-03 05:41:41,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:41,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382165642] [2021-11-03 05:41:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:41,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:41,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:41,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:41,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:41:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:41:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:41,971 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 05:41:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:42,156 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 05:41:42,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:42,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382165642] [2021-11-03 05:41:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382165642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:42,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:42,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:41:42,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275475896] [2021-11-03 05:41:42,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:41:42,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:41:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:41:42,185 INFO L87 Difference]: Start difference. First operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 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 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 05:41:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:42,236 INFO L93 Difference]: Finished difference Result 430 states and 629 transitions. [2021-11-03 05:41:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:41:42,237 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-11-03 05:41:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:42,248 INFO L225 Difference]: With dead ends: 430 [2021-11-03 05:41:42,248 INFO L226 Difference]: Without dead ends: 212 [2021-11-03 05:41:42,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 110 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 05:41:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-03 05:41:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-03 05:41:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.391089108910891) internal successors, (281), 211 states have internal predecessors, (281), 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 05:41:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 281 transitions. [2021-11-03 05:41:42,321 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 281 transitions. Word has length 56 [2021-11-03 05:41:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:42,321 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 281 transitions. [2021-11-03 05:41:42,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 05:41:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 281 transitions. [2021-11-03 05:41:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:41:42,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:42,327 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:42,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:42,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:42,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash 828944299, now seen corresponding path program 1 times [2021-11-03 05:41:42,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:42,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510468842] [2021-11-03 05:41:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:42,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:42,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:42,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:42,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:41:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:42,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:41:42,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:43,158 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 05:41:43,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:43,371 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 05:41:43,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:43,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510468842] [2021-11-03 05:41:43,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510468842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:43,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:43,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:41:43,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648476660] [2021-11-03 05:41:43,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:41:43,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:43,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:41:43,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:41:43,375 INFO L87 Difference]: Start difference. First operand 212 states and 281 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 05:41:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:43,511 INFO L93 Difference]: Finished difference Result 404 states and 540 transitions. [2021-11-03 05:41:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:41:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 56 [2021-11-03 05:41:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:43,513 INFO L225 Difference]: With dead ends: 404 [2021-11-03 05:41:43,514 INFO L226 Difference]: Without dead ends: 212 [2021-11-03 05:41:43,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 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 05:41:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-03 05:41:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-03 05:41:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.3712871287128714) internal successors, (277), 211 states have internal predecessors, (277), 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 05:41:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 277 transitions. [2021-11-03 05:41:43,529 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 277 transitions. Word has length 56 [2021-11-03 05:41:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:43,530 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 277 transitions. [2021-11-03 05:41:43,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 05:41:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 277 transitions. [2021-11-03 05:41:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:41:43,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:43,532 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:43,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:43,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:43,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:43,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1858303597, now seen corresponding path program 1 times [2021-11-03 05:41:43,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:43,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246231193] [2021-11-03 05:41:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:43,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:43,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:43,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:41:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:41:44,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:44,216 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 05:41:44,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:44,368 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 05:41:44,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:44,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246231193] [2021-11-03 05:41:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246231193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:44,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:44,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:41:44,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697242538] [2021-11-03 05:41:44,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:41:44,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:44,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:41:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:41:44,391 INFO L87 Difference]: Start difference. First operand 212 states and 277 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 05:41:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:44,513 INFO L93 Difference]: Finished difference Result 475 states and 607 transitions. [2021-11-03 05:41:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:41:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-03 05:41:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:44,516 INFO L225 Difference]: With dead ends: 475 [2021-11-03 05:41:44,517 INFO L226 Difference]: Without dead ends: 299 [2021-11-03 05:41:44,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 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 05:41:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-03 05:41:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 212. [2021-11-03 05:41:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.3613861386138615) internal successors, (275), 211 states have internal predecessors, (275), 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 05:41:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 275 transitions. [2021-11-03 05:41:44,533 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 275 transitions. Word has length 56 [2021-11-03 05:41:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 275 transitions. [2021-11-03 05:41:44,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 05:41:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 275 transitions. [2021-11-03 05:41:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:41:44,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:44,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:44,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:44,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:44,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:44,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1990287981, now seen corresponding path program 1 times [2021-11-03 05:41:44,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:44,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429057291] [2021-11-03 05:41:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:44,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:44,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:44,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:41:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:41:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:45,320 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 05:41:45,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:41:45,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:45,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429057291] [2021-11-03 05:41:45,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429057291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:45,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:45,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 05:41:45,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696181174] [2021-11-03 05:41:45,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:41:45,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:41:45,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:41:45,491 INFO L87 Difference]: Start difference. First operand 212 states and 275 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 05:41:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:45,787 INFO L93 Difference]: Finished difference Result 490 states and 627 transitions. [2021-11-03 05:41:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:41:45,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:41:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:45,790 INFO L225 Difference]: With dead ends: 490 [2021-11-03 05:41:45,790 INFO L226 Difference]: Without dead ends: 315 [2021-11-03 05:41:45,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:41:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-03 05:41:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 212. [2021-11-03 05:41:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.3415841584158417) internal successors, (271), 211 states have internal predecessors, (271), 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 05:41:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 271 transitions. [2021-11-03 05:41:45,819 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 271 transitions. Word has length 60 [2021-11-03 05:41:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:45,819 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 271 transitions. [2021-11-03 05:41:45,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 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 05:41:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 271 transitions. [2021-11-03 05:41:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:41:45,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:45,821 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:45,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:46,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:46,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:46,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 49668941, now seen corresponding path program 1 times [2021-11-03 05:41:46,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:46,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537293619] [2021-11-03 05:41:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:46,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:46,042 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:46,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:41:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:46,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:41:46,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:46,636 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 05:41:46,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:46,823 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 05:41:46,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:46,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537293619] [2021-11-03 05:41:46,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537293619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:46,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:46,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 05:41:46,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984833336] [2021-11-03 05:41:46,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:41:46,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:41:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:41:46,825 INFO L87 Difference]: Start difference. First operand 212 states and 271 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 05:41:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:47,372 INFO L93 Difference]: Finished difference Result 661 states and 840 transitions. [2021-11-03 05:41:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:41:47,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 64 [2021-11-03 05:41:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:47,376 INFO L225 Difference]: With dead ends: 661 [2021-11-03 05:41:47,376 INFO L226 Difference]: Without dead ends: 485 [2021-11-03 05:41:47,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:41:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-03 05:41:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 216. [2021-11-03 05:41:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 206 states have (on average 1.3349514563106797) internal successors, (275), 215 states have internal predecessors, (275), 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 05:41:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2021-11-03 05:41:47,389 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 64 [2021-11-03 05:41:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:47,390 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2021-11-03 05:41:47,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 05:41:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2021-11-03 05:41:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:41:47,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:47,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:47,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:47,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:47,609 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1788737394, now seen corresponding path program 1 times [2021-11-03 05:41:47,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:47,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160751896] [2021-11-03 05:41:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:47,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:47,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:47,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:47,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:41:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:48,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:41:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:48,263 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 05:41:48,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:48,451 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 05:41:48,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:48,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160751896] [2021-11-03 05:41:48,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160751896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:48,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:48,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 3] imperfect sequences [] total 8 [2021-11-03 05:41:48,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796536447] [2021-11-03 05:41:48,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:41:48,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:41:48,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:41:48,453 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:49,224 INFO L93 Difference]: Finished difference Result 778 states and 979 transitions. [2021-11-03 05:41:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:41:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 05:41:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:49,229 INFO L225 Difference]: With dead ends: 778 [2021-11-03 05:41:49,229 INFO L226 Difference]: Without dead ends: 599 [2021-11-03 05:41:49,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:41:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-03 05:41:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 222. [2021-11-03 05:41:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 212 states have (on average 1.330188679245283) internal successors, (282), 221 states have internal predecessors, (282), 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 05:41:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 282 transitions. [2021-11-03 05:41:49,249 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 282 transitions. Word has length 66 [2021-11-03 05:41:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:49,250 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 282 transitions. [2021-11-03 05:41:49,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 282 transitions. [2021-11-03 05:41:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 05:41:49,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:49,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:49,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:49,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:49,469 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1529718097, now seen corresponding path program 1 times [2021-11-03 05:41:49,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:49,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912993253] [2021-11-03 05:41:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:49,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:49,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:49,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:41:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:41:49,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:50,194 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 05:41:50,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:50,403 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 05:41:50,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:50,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912993253] [2021-11-03 05:41:50,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912993253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:50,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:50,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-03 05:41:50,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696323229] [2021-11-03 05:41:50,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:41:50,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:41:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:41:50,405 INFO L87 Difference]: Start difference. First operand 222 states and 282 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 05:41:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:51,140 INFO L93 Difference]: Finished difference Result 679 states and 857 transitions. [2021-11-03 05:41:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:41:51,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 76 [2021-11-03 05:41:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:51,143 INFO L225 Difference]: With dead ends: 679 [2021-11-03 05:41:51,143 INFO L226 Difference]: Without dead ends: 487 [2021-11-03 05:41:51,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:41:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-03 05:41:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 226. [2021-11-03 05:41:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 216 states have (on average 1.3240740740740742) internal successors, (286), 225 states have internal predecessors, (286), 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 05:41:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 286 transitions. [2021-11-03 05:41:51,161 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 286 transitions. Word has length 76 [2021-11-03 05:41:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:51,162 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 286 transitions. [2021-11-03 05:41:51,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 05:41:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 286 transitions. [2021-11-03 05:41:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 05:41:51,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:51,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:51,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:51,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:51,382 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1176629715, now seen corresponding path program 1 times [2021-11-03 05:41:51,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:51,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197974001] [2021-11-03 05:41:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:51,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:51,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:51,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:51,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:41:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:51,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:41:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:51,971 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 05:41:51,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:41:52,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:52,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197974001] [2021-11-03 05:41:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197974001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:52,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:52,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:41:52,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952085688] [2021-11-03 05:41:52,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:41:52,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:41:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:41:52,123 INFO L87 Difference]: Start difference. First operand 226 states and 286 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 05:41:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:52,372 INFO L93 Difference]: Finished difference Result 608 states and 753 transitions. [2021-11-03 05:41:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:41:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 76 [2021-11-03 05:41:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:52,375 INFO L225 Difference]: With dead ends: 608 [2021-11-03 05:41:52,375 INFO L226 Difference]: Without dead ends: 419 [2021-11-03 05:41:52,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 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 05:41:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-03 05:41:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 226. [2021-11-03 05:41:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 216 states have (on average 1.3148148148148149) internal successors, (284), 225 states have internal predecessors, (284), 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 05:41:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2021-11-03 05:41:52,392 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 76 [2021-11-03 05:41:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:52,392 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2021-11-03 05:41:52,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 05:41:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2021-11-03 05:41:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 05:41:52,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:52,393 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:52,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:52,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:52,612 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash 660004237, now seen corresponding path program 1 times [2021-11-03 05:41:52,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:52,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469675199] [2021-11-03 05:41:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:52,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:52,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:52,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:41:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 05:41:53,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:53,678 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 05:41:53,682 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 05:41:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:41:53,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:41:54,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:54,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469675199] [2021-11-03 05:41:54,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469675199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:41:54,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097836512] [2021-11-03 05:41:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:54,186 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:41:54,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:41:54,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:41:54,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 05:41:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:41:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:55,083 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 05:41:55,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:55,265 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 05:41:55,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097836512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:55,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:41:55,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 14 [2021-11-03 05:41:55,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619651337] [2021-11-03 05:41:55,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:41:55,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:41:55,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:41:55,267 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:55,679 INFO L93 Difference]: Finished difference Result 717 states and 880 transitions. [2021-11-03 05:41:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:41:55,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 05:41:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:55,683 INFO L225 Difference]: With dead ends: 717 [2021-11-03 05:41:55,683 INFO L226 Difference]: Without dead ends: 526 [2021-11-03 05:41:55,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 304 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 05:41:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-03 05:41:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 226. [2021-11-03 05:41:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 216 states have (on average 1.3055555555555556) internal successors, (282), 225 states have internal predecessors, (282), 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 05:41:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2021-11-03 05:41:55,701 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 80 [2021-11-03 05:41:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:55,701 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2021-11-03 05:41:55,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2021-11-03 05:41:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:41:55,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:55,703 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:41:55,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:55,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:56,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:56,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:41:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2023690006, now seen corresponding path program 1 times [2021-11-03 05:41:56,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:56,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466932559] [2021-11-03 05:41:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:56,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:56,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:56,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:41:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 05:41:56,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:57,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:41:57,597 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 05:41:57,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:41:57,605 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 05:41:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:41:57,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:58,961 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:41:58,961 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 36 treesize of output 35 [2021-11-03 05:41:58,976 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:41:58,976 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 05:41:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:41:59,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:59,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466932559] [2021-11-03 05:41:59,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466932559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:41:59,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [187586924] [2021-11-03 05:41:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:59,053 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:41:59,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:41:59,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:41:59,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 05:42:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:00,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:42:00,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:00,327 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 05:42:00,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-03 05:42:06,660 WARN L207 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-11-03 05:42:06,661 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-03 05:42:06,661 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 05:44:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:44:43,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:44:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:44:45,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [187586924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:45,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:44:45,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 8] imperfect sequences [12, 11] total 35 [2021-11-03 05:44:45,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333173662] [2021-11-03 05:44:45,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 05:44:45,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:44:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 05:44:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:44:45,185 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 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 05:45:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:09,718 INFO L93 Difference]: Finished difference Result 403 states and 501 transitions. [2021-11-03 05:45:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 05:45:09,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 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 82 [2021-11-03 05:45:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:09,721 INFO L225 Difference]: With dead ends: 403 [2021-11-03 05:45:09,721 INFO L226 Difference]: Without dead ends: 272 [2021-11-03 05:45:09,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=304, Invalid=2048, Unknown=0, NotChecked=0, Total=2352 [2021-11-03 05:45:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-03 05:45:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 227. [2021-11-03 05:45:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 217 states have (on average 1.304147465437788) internal successors, (283), 226 states have internal predecessors, (283), 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 05:45:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 283 transitions. [2021-11-03 05:45:09,750 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 283 transitions. Word has length 82 [2021-11-03 05:45:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:09,750 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 283 transitions. [2021-11-03 05:45:09,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 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 05:45:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 283 transitions. [2021-11-03 05:45:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:45:09,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:09,752 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:09,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:09,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:10,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:10,158 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:45:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2021842964, now seen corresponding path program 1 times [2021-11-03 05:45:10,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:10,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825251950] [2021-11-03 05:45:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:10,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:10,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:10,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:10,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:45:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:10,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 05:45:10,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:11,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:11,758 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 05:45:11,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:11,765 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 21 treesize of output 16 [2021-11-03 05:45:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:45:11,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:12,946 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:45:12,947 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 05:45:12,956 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:45:12,957 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 05:45:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:45:13,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:13,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825251950] [2021-11-03 05:45:13,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825251950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:13,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1714851162] [2021-11-03 05:45:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:13,036 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:45:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:45:13,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:45:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 05:45:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 05:45:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:14,503 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-03 05:45:14,504 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 05:45:15,723 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 05:45:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:45:15,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:16,599 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 96 treesize of output 90 [2021-11-03 05:45:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:45:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1714851162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:45:16,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:45:16,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [12, 11] total 35 [2021-11-03 05:45:16,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545988097] [2021-11-03 05:45:16,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 05:45:16,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:45:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 05:45:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 05:45:16,880 INFO L87 Difference]: Start difference. First operand 227 states and 283 transitions. Second operand has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 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 05:45:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:45:21,396 INFO L93 Difference]: Finished difference Result 667 states and 837 transitions. [2021-11-03 05:45:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-03 05:45:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 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 82 [2021-11-03 05:45:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:45:21,400 INFO L225 Difference]: With dead ends: 667 [2021-11-03 05:45:21,400 INFO L226 Difference]: Without dead ends: 466 [2021-11-03 05:45:21,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 05:45:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-03 05:45:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 233. [2021-11-03 05:45:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 223 states have (on average 1.295964125560538) internal successors, (289), 232 states have internal predecessors, (289), 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 05:45:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 289 transitions. [2021-11-03 05:45:21,429 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 289 transitions. Word has length 82 [2021-11-03 05:45:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:45:21,430 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 289 transitions. [2021-11-03 05:45:21,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.5625) internal successors, (153), 16 states have internal predecessors, (153), 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 05:45:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 289 transitions. [2021-11-03 05:45:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:45:21,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:45:21,431 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:45:21,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:21,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:45:21,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:45:21,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:45:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:45:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash -246835602, now seen corresponding path program 1 times [2021-11-03 05:45:21,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:45:21,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372788562] [2021-11-03 05:45:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:21,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:45:21,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:45:21,841 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:45:21,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:45:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 05:45:22,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:23,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:23,682 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 05:45:23,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:45:23,689 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 05:45:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:45:23,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:45:25,041 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:45:25,041 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 05:45:25,050 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:45:25,051 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 05:45:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:45:25,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:45:25,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372788562] [2021-11-03 05:45:25,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372788562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:45:25,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [179978443] [2021-11-03 05:45:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:45:25,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:45:25,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:45:25,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:45:25,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:45:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:45:26,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-03 05:45:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:45:26,963 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 05:45:26,964 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 05:45:33,193 WARN L207 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-11-03 05:45:33,193 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-03 05:45:33,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 05:48:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:48:02,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:48:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:48:04,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [179978443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:48:04,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:48:04,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 10] imperfect sequences [12, 11] total 38 [2021-11-03 05:48:04,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700324375] [2021-11-03 05:48:04,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 05:48:04,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 05:48:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 05:48:04,086 INFO L87 Difference]: Start difference. First operand 233 states and 289 transitions. Second operand has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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 05:49:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:49:11,110 INFO L93 Difference]: Finished difference Result 741 states and 933 transitions. [2021-11-03 05:49:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-03 05:49:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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 82 [2021-11-03 05:49:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:49:11,114 INFO L225 Difference]: With dead ends: 741 [2021-11-03 05:49:11,114 INFO L226 Difference]: Without dead ends: 561 [2021-11-03 05:49:11,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=610, Invalid=3421, Unknown=1, NotChecked=0, Total=4032 [2021-11-03 05:49:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-03 05:49:11,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 290. [2021-11-03 05:49:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 280 states have (on average 1.275) internal successors, (357), 289 states have internal predecessors, (357), 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 05:49:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 357 transitions. [2021-11-03 05:49:11,153 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 357 transitions. Word has length 82 [2021-11-03 05:49:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:49:11,153 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 357 transitions. [2021-11-03 05:49:11,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.947368421052632) internal successors, (151), 19 states have internal predecessors, (151), 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 05:49:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 357 transitions. [2021-11-03 05:49:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:49:11,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:49:11,155 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:49:11,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:49:11,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 05:49:11,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:49:11,560 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:49:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:49:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash 433222768, now seen corresponding path program 1 times [2021-11-03 05:49:11,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:49:11,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217381802] [2021-11-03 05:49:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:11,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:49:11,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:49:11,562 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:49:11,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:49:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:12,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 05:49:12,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:13,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:13,440 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 05:49:13,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:13,447 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 05:49:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:49:13,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:14,694 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:49:14,695 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 05:49:14,705 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:49:14,705 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 05:49:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:49:14,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:49:14,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217381802] [2021-11-03 05:49:14,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217381802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:14,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371854490] [2021-11-03 05:49:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:14,794 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:49:14,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:49:14,794 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:49:14,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:49:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:16,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 05:49:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:16,655 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 05:49:16,655 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 29 treesize of output 17 [2021-11-03 05:49:25,638 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-11-03 05:49:25,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-11-03 05:49:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:49:25,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:27,327 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 165 treesize of output 157 [2021-11-03 05:49:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:49:27,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1371854490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:27,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291054244] [2021-11-03 05:49:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:49:27,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:49:27,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:49:27,553 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:49:27,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 05:49:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:49:28,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:49:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:49:30,470 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 05:49:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:49:30,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:49:30,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:49:30,727 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 05:49:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:49:31,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291054244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:49:31,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:49:31,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14, 14, 13, 13] total 52 [2021-11-03 05:49:31,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170851519] [2021-11-03 05:49:31,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-03 05:49:31,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:49:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-03 05:49:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 05:49:31,353 INFO L87 Difference]: Start difference. First operand 290 states and 357 transitions. Second operand has 52 states, 52 states have (on average 6.403846153846154) internal successors, (333), 52 states have internal predecessors, (333), 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 05:50:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:50:58,923 INFO L93 Difference]: Finished difference Result 1063 states and 1286 transitions. [2021-11-03 05:50:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-03 05:50:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.403846153846154) internal successors, (333), 52 states have internal predecessors, (333), 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 82 [2021-11-03 05:50:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:50:58,929 INFO L225 Difference]: With dead ends: 1063 [2021-11-03 05:50:58,929 INFO L226 Difference]: Without dead ends: 827 [2021-11-03 05:50:58,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 435 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=1637, Invalid=10351, Unknown=2, NotChecked=0, Total=11990 [2021-11-03 05:50:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-03 05:50:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 318. [2021-11-03 05:50:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 308 states have (on average 1.2629870129870129) internal successors, (389), 317 states have internal predecessors, (389), 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 05:50:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 389 transitions. [2021-11-03 05:50:58,983 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 389 transitions. Word has length 82 [2021-11-03 05:50:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:50:58,983 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 389 transitions. [2021-11-03 05:50:58,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.403846153846154) internal successors, (333), 52 states have internal predecessors, (333), 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 05:50:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 389 transitions. [2021-11-03 05:50:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:50:58,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:50:58,985 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:50:59,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:50:59,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-03 05:50:59,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 05:50:59,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:50:59,591 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:50:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:50:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1712055758, now seen corresponding path program 1 times [2021-11-03 05:50:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:50:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079641208] [2021-11-03 05:50:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:50:59,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:50:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:50:59,594 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:50:59,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:51:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:00,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:51:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:51:01,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:51:01,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:01,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079641208] [2021-11-03 05:51:01,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079641208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:01,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:01,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:51:01,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846057215] [2021-11-03 05:51:01,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:51:01,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:51:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:51:01,461 INFO L87 Difference]: Start difference. First operand 318 states and 389 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 05:51:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:01,709 INFO L93 Difference]: Finished difference Result 693 states and 850 transitions. [2021-11-03 05:51:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:51:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 98 [2021-11-03 05:51:01,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:01,711 INFO L225 Difference]: With dead ends: 693 [2021-11-03 05:51:01,712 INFO L226 Difference]: Without dead ends: 427 [2021-11-03 05:51:01,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 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 05:51:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-03 05:51:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 316. [2021-11-03 05:51:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 306 states have (on average 1.238562091503268) internal successors, (379), 315 states have internal predecessors, (379), 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 05:51:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 379 transitions. [2021-11-03 05:51:01,763 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 379 transitions. Word has length 98 [2021-11-03 05:51:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:01,763 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 379 transitions. [2021-11-03 05:51:01,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 05:51:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 379 transitions. [2021-11-03 05:51:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:51:01,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:01,765 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:01,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:01,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:01,983 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:51:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash -249518900, now seen corresponding path program 2 times [2021-11-03 05:51:01,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:01,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620674885] [2021-11-03 05:51:01,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:51:01,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:01,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:01,986 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:01,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:51:03,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 05:51:03,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:51:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 05:51:03,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:04,418 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 05:51:04,421 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 05:51:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:04,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:05,320 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:51:05,321 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 05:51:05,329 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:51:05,329 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 05:51:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:05,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:05,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620674885] [2021-11-03 05:51:05,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620674885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:05,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:05,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-03 05:51:05,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143225969] [2021-11-03 05:51:05,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:51:05,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:51:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:51:05,369 INFO L87 Difference]: Start difference. First operand 316 states and 379 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:09,153 INFO L93 Difference]: Finished difference Result 978 states and 1189 transitions. [2021-11-03 05:51:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 05:51:09,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-03 05:51:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:09,159 INFO L225 Difference]: With dead ends: 978 [2021-11-03 05:51:09,159 INFO L226 Difference]: Without dead ends: 748 [2021-11-03 05:51:09,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-03 05:51:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-03 05:51:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 454. [2021-11-03 05:51:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 444 states have (on average 1.204954954954955) internal successors, (535), 453 states have internal predecessors, (535), 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 05:51:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 535 transitions. [2021-11-03 05:51:09,249 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 535 transitions. Word has length 98 [2021-11-03 05:51:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 535 transitions. [2021-11-03 05:51:09,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 535 transitions. [2021-11-03 05:51:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:51:09,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:09,251 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:09,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:09,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:09,467 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:51:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash 451545678, now seen corresponding path program 1 times [2021-11-03 05:51:09,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:09,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843405745] [2021-11-03 05:51:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:09,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:09,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:09,470 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:09,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:51:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:11,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:51:11,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:11,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:11,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:11,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843405745] [2021-11-03 05:51:11,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843405745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:11,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:11,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 05:51:11,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13871275] [2021-11-03 05:51:11,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:51:11,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:51:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:51:11,885 INFO L87 Difference]: Start difference. First operand 454 states and 535 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:12,131 INFO L93 Difference]: Finished difference Result 610 states and 730 transitions. [2021-11-03 05:51:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:51:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-03 05:51:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:12,135 INFO L225 Difference]: With dead ends: 610 [2021-11-03 05:51:12,135 INFO L226 Difference]: Without dead ends: 454 [2021-11-03 05:51:12,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:51:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-03 05:51:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-11-03 05:51:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 444 states have (on average 1.195945945945946) internal successors, (531), 453 states have internal predecessors, (531), 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 05:51:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 531 transitions. [2021-11-03 05:51:12,210 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 531 transitions. Word has length 98 [2021-11-03 05:51:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:12,210 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 531 transitions. [2021-11-03 05:51:12,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 531 transitions. [2021-11-03 05:51:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:51:12,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:12,212 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:12,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:12,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:12,423 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:51:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1288053128, now seen corresponding path program 1 times [2021-11-03 05:51:12,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:12,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589916081] [2021-11-03 05:51:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:12,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:12,425 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:12,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:51:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:13,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:51:13,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:14,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:14,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:14,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589916081] [2021-11-03 05:51:14,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589916081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:14,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:14,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:51:14,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414203480] [2021-11-03 05:51:14,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:51:14,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:51:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:51:14,363 INFO L87 Difference]: Start difference. First operand 454 states and 531 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:14,536 INFO L93 Difference]: Finished difference Result 650 states and 774 transitions. [2021-11-03 05:51:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:51:14,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-03 05:51:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:14,539 INFO L225 Difference]: With dead ends: 650 [2021-11-03 05:51:14,539 INFO L226 Difference]: Without dead ends: 322 [2021-11-03 05:51:14,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 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 05:51:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-03 05:51:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2021-11-03 05:51:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 308 states have (on average 1.198051948051948) internal successors, (369), 317 states have internal predecessors, (369), 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 05:51:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 369 transitions. [2021-11-03 05:51:14,580 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 369 transitions. Word has length 98 [2021-11-03 05:51:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:14,581 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 369 transitions. [2021-11-03 05:51:14,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 369 transitions. [2021-11-03 05:51:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:51:14,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:14,589 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:14,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:14,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:14,791 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:51:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash 589514762, now seen corresponding path program 1 times [2021-11-03 05:51:14,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:14,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386201136] [2021-11-03 05:51:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:14,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:14,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:14,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:51:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:51:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:16,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:16,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:16,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386201136] [2021-11-03 05:51:16,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386201136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:16,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:16,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:51:16,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566656211] [2021-11-03 05:51:16,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:51:16,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:51:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:51:16,783 INFO L87 Difference]: Start difference. First operand 318 states and 369 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:16,955 INFO L93 Difference]: Finished difference Result 483 states and 570 transitions. [2021-11-03 05:51:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:51:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-03 05:51:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:16,957 INFO L225 Difference]: With dead ends: 483 [2021-11-03 05:51:16,957 INFO L226 Difference]: Without dead ends: 256 [2021-11-03 05:51:16,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 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 05:51:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-03 05:51:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 248. [2021-11-03 05:51:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 238 states have (on average 1.2142857142857142) internal successors, (289), 247 states have internal predecessors, (289), 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 05:51:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 289 transitions. [2021-11-03 05:51:16,992 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 289 transitions. Word has length 98 [2021-11-03 05:51:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:16,993 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 289 transitions. [2021-11-03 05:51:16,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:51:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 289 transitions. [2021-11-03 05:51:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-03 05:51:16,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:16,994 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:17,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:17,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:17,194 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:51:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:17,194 INFO L85 PathProgramCache]: Analyzing trace with hash 451536171, now seen corresponding path program 1 times [2021-11-03 05:51:17,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:17,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219411655] [2021-11-03 05:51:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:17,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:17,196 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:17,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:51:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:18,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:51:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:19,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 05:51:19,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:19,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219411655] [2021-11-03 05:51:19,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219411655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:51:19,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:51:19,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 05:51:19,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562448843] [2021-11-03 05:51:19,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:51:19,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:51:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:51:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:51:19,810 INFO L87 Difference]: Start difference. First operand 248 states and 289 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 05:51:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:51:20,142 INFO L93 Difference]: Finished difference Result 388 states and 458 transitions. [2021-11-03 05:51:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:51:20,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 100 [2021-11-03 05:51:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:51:20,145 INFO L225 Difference]: With dead ends: 388 [2021-11-03 05:51:20,146 INFO L226 Difference]: Without dead ends: 248 [2021-11-03 05:51:20,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:51:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-03 05:51:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-11-03 05:51:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 238 states have (on average 1.2100840336134453) internal successors, (288), 247 states have internal predecessors, (288), 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 05:51:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2021-11-03 05:51:20,187 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 100 [2021-11-03 05:51:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:51:20,187 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2021-11-03 05:51:20,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 05:51:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2021-11-03 05:51:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-03 05:51:20,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:51:20,189 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:20,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:51:20,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:51:20,402 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:51:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:51:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -254662275, now seen corresponding path program 1 times [2021-11-03 05:51:20,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:51:20,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920329370] [2021-11-03 05:51:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:20,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:51:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:51:20,404 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:51:20,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 05:51:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-03 05:51:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:51:24,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:51:31,441 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-03 05:51:31,441 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 125 [2021-11-03 05:51:31,866 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-03 05:51:31,866 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 113 treesize of output 143 [2021-11-03 05:51:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:51:36,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:51:36,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920329370] [2021-11-03 05:51:36,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920329370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:51:36,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907731813] [2021-11-03 05:51:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:51:36,383 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:51:36,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:51:36,384 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:51:36,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbbc315-5a14-47be-96db-b5ff82b981cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-03 05:51:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:51:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 05:51:39,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:51:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:51:39,582 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 05:51:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:51:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:51:39,597 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 05:51:43,759 INFO L354 Elim1Store]: treesize reduction 101, result has 2.9 percent of original size [2021-11-03 05:51:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 81 [2021-11-03 05:51:43,832 INFO L354 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2021-11-03 05:51:43,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 42 [2021-11-03 05:51:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:51:44,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:52:14,083 WARN L207 SmtUtils]: Spent 24.76 s on a formula simplification. DAG size of input: 234 DAG size of output: 162 [2021-11-03 05:52:14,084 INFO L354 Elim1Store]: treesize reduction 1704, result has 47.1 percent of original size [2021-11-03 05:52:14,085 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 19553 treesize of output 17903