./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:16:21,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:16:21,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:16:21,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:16:21,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:16:21,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:16:21,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:16:21,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:16:21,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:16:21,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:16:21,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:16:21,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:16:21,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:16:21,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:16:21,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:16:21,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:16:21,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:16:21,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:16:21,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:16:21,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:16:21,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:16:21,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:16:21,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:16:21,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:16:21,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:16:21,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:16:21,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:16:21,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:16:21,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:16:21,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:16:21,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:16:21,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:16:21,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:16:21,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:16:21,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:16:21,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:16:21,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:16:21,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:16:21,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:16:21,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:16:21,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:16:21,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:16:21,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:16:21,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:16:21,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:16:21,510 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:16:21,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:16:21,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:16:21,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:16:21,511 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:16:21,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:16:21,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:16:21,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:16:21,513 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:16:21,513 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:16:21,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:16:21,514 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:16:21,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:16:21,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:16:21,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:16:21,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:16:21,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:16:21,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:16:21,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:16:21,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:16:21,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:16:21,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:16:21,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:16:21,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:16:21,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:16:21,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:16:21,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:16:21,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:16:21,520 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:16:21,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:16:21,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:16:21,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:16:21,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:16:21,521 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-03 05:16:21,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:16:21,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:16:21,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:16:21,898 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:16:21,900 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:16:21,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-03 05:16:21,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/4f89cef75/a8284fd192d643f4adc1020125e5dbb7/FLAGe8810892a [2021-11-03 05:16:22,841 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:16:22,844 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-03 05:16:22,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/4f89cef75/a8284fd192d643f4adc1020125e5dbb7/FLAGe8810892a [2021-11-03 05:16:23,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/4f89cef75/a8284fd192d643f4adc1020125e5dbb7 [2021-11-03 05:16:23,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:16:23,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:16:23,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:16:23,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:16:23,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:16:23,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:16:23" (1/1) ... [2021-11-03 05:16:23,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5927a418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:23, skipping insertion in model container [2021-11-03 05:16:23,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:16:23" (1/1) ... [2021-11-03 05:16:23,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:16:23,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:16:23,872 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-03 05:16:23,884 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-03 05:16:23,910 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:16:23,918 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:16:25,043 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,046 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,047 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,048 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,051 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,076 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,077 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,085 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,087 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,090 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,093 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,094 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,095 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:25,523 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:16:25,525 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:16:25,526 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:16:25,527 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:16:25,529 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:16:25,530 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:16:25,530 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:16:25,531 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:16:25,532 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:16:25,533 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:16:25,729 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:16:25,773 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 05:16:25,783 INFO L168 Benchmark]: Toolchain (without parser) took 2399.08 ms. Allocated memory was 107.0 MB in the beginning and 146.8 MB in the end (delta: 39.8 MB). Free memory was 69.9 MB in the beginning and 92.2 MB in the end (delta: -22.3 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. [2021-11-03 05:16:25,785 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 63.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:16:25,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2395.59 ms. Allocated memory was 107.0 MB in the beginning and 146.8 MB in the end (delta: 39.8 MB). Free memory was 69.7 MB in the beginning and 92.2 MB in the end (delta: -22.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. [2021-11-03 05:16:25,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 63.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2395.59 ms. Allocated memory was 107.0 MB in the beginning and 146.8 MB in the end (delta: 39.8 MB). Free memory was 69.7 MB in the beginning and 92.2 MB in the end (delta: -22.5 MB). Peak memory consumption was 20.9 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:16:28,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:16:28,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:16:28,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:16:28,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:16:28,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:16:28,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:16:28,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:16:28,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:16:28,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:16:28,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:16:28,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:16:28,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:16:28,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:16:28,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:16:28,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:16:28,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:16:28,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:16:28,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:16:28,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:16:28,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:16:28,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:16:28,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:16:28,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:16:28,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:16:28,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:16:28,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:16:28,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:16:28,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:16:28,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:16:28,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:16:28,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:16:28,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:16:28,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:16:28,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:16:28,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:16:28,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:16:28,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:16:28,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:16:28,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:16:28,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:16:28,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:16:28,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:16:28,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:16:28,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:16:28,381 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:16:28,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:16:28,382 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:16:28,382 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:16:28,382 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:16:28,383 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:16:28,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:16:28,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:16:28,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:16:28,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:16:28,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:16:28,385 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:16:28,385 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:16:28,385 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:16:28,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:16:28,388 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:16:28,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:16:28,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:16:28,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:16:28,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:16:28,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:16:28,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:16:28,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:16:28,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:16:28,391 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:16:28,391 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:28,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:16:28,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:16:28,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:16:28,392 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-03 05:16:28,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:16:28,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:16:28,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:16:28,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:16:28,835 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:16:28,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-03 05:16:28,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/f299877ca/8514cc5473b94cfa8c7e298cb9bd14f6/FLAG76d6a297c [2021-11-03 05:16:29,904 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:16:29,912 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-03 05:16:29,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/f299877ca/8514cc5473b94cfa8c7e298cb9bd14f6/FLAG76d6a297c [2021-11-03 05:16:30,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/data/f299877ca/8514cc5473b94cfa8c7e298cb9bd14f6 [2021-11-03 05:16:30,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:16:30,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:16:30,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:16:30,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:16:30,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:16:30,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:16:30" (1/1) ... [2021-11-03 05:16:30,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ae1e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:30, skipping insertion in model container [2021-11-03 05:16:30,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:16:30" (1/1) ... [2021-11-03 05:16:30,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:16:30,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:16:30,932 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-03 05:16:30,939 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-03 05:16:30,965 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:16:30,972 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:16:32,031 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,033 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,034 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,038 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,041 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,056 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,059 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,060 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,062 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,063 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,459 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:16:32,460 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:16:32,462 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:16:32,463 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:16:32,465 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:16:32,466 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:16:32,466 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:16:32,467 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:16:32,468 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:16:32,469 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:16:32,625 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:16:32,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:16:32,682 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:16:32,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:16:32,754 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-03 05:16:32,754 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-03 05:16:32,759 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:16:32,759 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:16:32,852 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,855 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,861 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,861 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,862 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,873 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,881 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,882 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,884 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,885 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,886 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,887 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,887 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:32,952 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:16:32,953 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:16:32,953 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:16:32,954 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:16:32,955 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:16:32,956 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:16:32,956 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:16:32,957 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:16:32,957 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:16:32,958 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:16:32,982 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:16:33,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:16:33,017 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:16:33,042 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-03 05:16:33,051 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_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-03 05:16:33,053 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 05:16:33,054 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 05:16:33,091 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,092 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,092 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,093 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,093 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,100 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,101 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,102 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,102 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,103 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,104 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,104 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,105 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 05:16:33,139 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 05:16:33,140 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 05:16:33,141 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 05:16:33,141 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 05:16:33,142 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 05:16:33,143 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 05:16:33,143 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 05:16:33,144 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 05:16:33,144 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 05:16:33,145 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 05:16:33,191 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 05:16:33,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:16:33,516 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:16:33,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33 WrapperNode [2021-11-03 05:16:33,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:16:33,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:16:33,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:16:33,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:16:33,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:16:33,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:16:33,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:16:33,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:16:33,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:16:33,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:16:33,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:16:33,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:16:33,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (1/1) ... [2021-11-03 05:16:33,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:16:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:16:33,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:16:33,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:16:33,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:16:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:16:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:16:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:16:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:16:33,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:16:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:16:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:16:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:16:35,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:16:35,001 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-03 05:16:35,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:16:35 BoogieIcfgContainer [2021-11-03 05:16:35,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:16:35,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:16:35,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:16:35,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:16:35,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:16:30" (1/3) ... [2021-11-03 05:16:35,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e29a69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:16:35, skipping insertion in model container [2021-11-03 05:16:35,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:33" (2/3) ... [2021-11-03 05:16:35,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e29a69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:16:35, skipping insertion in model container [2021-11-03 05:16:35,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:16:35" (3/3) ... [2021-11-03 05:16:35,012 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2021-11-03 05:16:35,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:16:35,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-03 05:16:35,075 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:16:35,089 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 05:16:35,090 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-03 05:16:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:16:35,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:35,122 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:35,123 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1861478915, now seen corresponding path program 1 times [2021-11-03 05:16:35,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:35,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776154094] [2021-11-03 05:16:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:35,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:35,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:35,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:35,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:16:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:16:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:35,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:35,721 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 05:16:35,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:35,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776154094] [2021-11-03 05:16:35,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776154094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:35,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:35,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:16:35,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886253953] [2021-11-03 05:16:35,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:16:35,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:35,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:16:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:16:35,752 INFO L87 Difference]: Start difference. First operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:35,779 INFO L93 Difference]: Finished difference Result 264 states and 379 transitions. [2021-11-03 05:16:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:16:35,797 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 05:16:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:35,806 INFO L225 Difference]: With dead ends: 264 [2021-11-03 05:16:35,806 INFO L226 Difference]: Without dead ends: 129 [2021-11-03 05:16:35,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:16:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-03 05:16:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-03 05:16:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 128 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-11-03 05:16:35,852 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 40 [2021-11-03 05:16:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:35,853 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-11-03 05:16:35,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-11-03 05:16:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:16:35,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:35,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:35,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:16:36,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:36,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash -836812353, now seen corresponding path program 1 times [2021-11-03 05:16:36,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:36,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847764925] [2021-11-03 05:16:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:36,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:36,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:36,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:16:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:16:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:36,574 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 05:16:36,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:36,700 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 05:16:36,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:36,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847764925] [2021-11-03 05:16:36,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847764925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:36,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:36,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:16:36,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41190280] [2021-11-03 05:16:36,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:36,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:36,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:36,712 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:36,813 INFO L93 Difference]: Finished difference Result 243 states and 323 transitions. [2021-11-03 05:16:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 05:16:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:36,819 INFO L225 Difference]: With dead ends: 243 [2021-11-03 05:16:36,819 INFO L226 Difference]: Without dead ends: 129 [2021-11-03 05:16:36,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:16:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-03 05:16:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-03 05:16:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3770491803278688) internal successors, (168), 128 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2021-11-03 05:16:36,838 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 40 [2021-11-03 05:16:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:36,839 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2021-11-03 05:16:36,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2021-11-03 05:16:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:16:36,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:36,841 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:36,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:37,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:37,061 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1534926909, now seen corresponding path program 1 times [2021-11-03 05:16:37,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:37,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25197783] [2021-11-03 05:16:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:37,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:37,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:37,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:37,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:16:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:37,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:16:37,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:37,512 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 05:16:37,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:37,615 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 05:16:37,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:37,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25197783] [2021-11-03 05:16:37,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25197783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:37,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:37,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:16:37,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457697765] [2021-11-03 05:16:37,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:16:37,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:16:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:16:37,617 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:37,688 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2021-11-03 05:16:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:16:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 05:16:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:37,691 INFO L225 Difference]: With dead ends: 275 [2021-11-03 05:16:37,691 INFO L226 Difference]: Without dead ends: 179 [2021-11-03 05:16:37,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:16:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-03 05:16:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2021-11-03 05:16:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3688524590163935) internal successors, (167), 128 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2021-11-03 05:16:37,718 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 40 [2021-11-03 05:16:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2021-11-03 05:16:37,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2021-11-03 05:16:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:16:37,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:37,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:37,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 05:16:37,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:37,922 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:37,923 INFO L85 PathProgramCache]: Analyzing trace with hash 199131234, now seen corresponding path program 1 times [2021-11-03 05:16:37,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:37,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312305722] [2021-11-03 05:16:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:37,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:37,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:37,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:37,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:16:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:16:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:38,401 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 05:16:38,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:38,532 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 05:16:38,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:38,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312305722] [2021-11-03 05:16:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312305722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:38,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:38,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:16:38,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787522969] [2021-11-03 05:16:38,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:16:38,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:38,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:16:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:16:38,536 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:38,738 INFO L93 Difference]: Finished difference Result 284 states and 361 transitions. [2021-11-03 05:16:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:16:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 05:16:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:38,748 INFO L225 Difference]: With dead ends: 284 [2021-11-03 05:16:38,748 INFO L226 Difference]: Without dead ends: 187 [2021-11-03 05:16:38,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:16:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-03 05:16:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-11-03 05:16:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 128 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2021-11-03 05:16:38,773 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 42 [2021-11-03 05:16:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:38,773 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2021-11-03 05:16:38,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2021-11-03 05:16:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 05:16:38,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:38,775 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:38,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:38,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:38,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash 496706596, now seen corresponding path program 1 times [2021-11-03 05:16:38,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:38,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387057473] [2021-11-03 05:16:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:38,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:38,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:38,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:38,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:16:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:39,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:16:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:39,409 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 05:16:39,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:39,541 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 05:16:39,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:39,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387057473] [2021-11-03 05:16:39,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387057473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:39,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:39,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 05:16:39,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081038575] [2021-11-03 05:16:39,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:16:39,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:39,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:16:39,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:16:39,546 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:39,863 INFO L93 Difference]: Finished difference Result 379 states and 479 transitions. [2021-11-03 05:16:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:16:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-03 05:16:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:39,866 INFO L225 Difference]: With dead ends: 379 [2021-11-03 05:16:39,866 INFO L226 Difference]: Without dead ends: 281 [2021-11-03 05:16:39,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:16:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-03 05:16:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 131. [2021-11-03 05:16:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.346774193548387) internal successors, (167), 130 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-11-03 05:16:39,881 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 44 [2021-11-03 05:16:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:39,882 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-11-03 05:16:39,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-11-03 05:16:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 05:16:39,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:39,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:39,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:40,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:40,102 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1200660794, now seen corresponding path program 1 times [2021-11-03 05:16:40,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:40,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049704281] [2021-11-03 05:16:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:40,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:40,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:40,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:16:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:16:40,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:40,580 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 05:16:40,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:40,722 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 05:16:40,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049704281] [2021-11-03 05:16:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049704281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:40,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:40,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 3] imperfect sequences [] total 7 [2021-11-03 05:16:40,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031771285] [2021-11-03 05:16:40,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:16:40,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:16:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:16:40,731 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:41,209 INFO L93 Difference]: Finished difference Result 449 states and 563 transitions. [2021-11-03 05:16:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:16:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 05:16:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:41,213 INFO L225 Difference]: With dead ends: 449 [2021-11-03 05:16:41,214 INFO L226 Difference]: Without dead ends: 350 [2021-11-03 05:16:41,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:16:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-03 05:16:41,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 135. [2021-11-03 05:16:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 128 states have (on average 1.34375) internal successors, (172), 134 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 172 transitions. [2021-11-03 05:16:41,228 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 172 transitions. Word has length 45 [2021-11-03 05:16:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:41,229 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 172 transitions. [2021-11-03 05:16:41,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 172 transitions. [2021-11-03 05:16:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:16:41,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:41,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:41,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:41,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:41,452 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1737555954, now seen corresponding path program 1 times [2021-11-03 05:16:41,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:41,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95649173] [2021-11-03 05:16:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:41,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:41,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:41,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:41,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:16:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:16:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:42,036 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 05:16:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:42,188 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 05:16:42,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:42,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95649173] [2021-11-03 05:16:42,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95649173] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:42,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:42,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-03 05:16:42,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620426712] [2021-11-03 05:16:42,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:16:42,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:16:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:16:42,190 INFO L87 Difference]: Start difference. First operand 135 states and 172 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:42,574 INFO L93 Difference]: Finished difference Result 393 states and 496 transitions. [2021-11-03 05:16:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:16:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 05:16:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:42,577 INFO L225 Difference]: With dead ends: 393 [2021-11-03 05:16:42,577 INFO L226 Difference]: Without dead ends: 283 [2021-11-03 05:16:42,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:16:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-03 05:16:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 137. [2021-11-03 05:16:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.3384615384615384) internal successors, (174), 136 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2021-11-03 05:16:42,588 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 50 [2021-11-03 05:16:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:42,588 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2021-11-03 05:16:42,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2021-11-03 05:16:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:16:42,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:42,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:42,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:42,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:42,808 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1675516340, now seen corresponding path program 1 times [2021-11-03 05:16:42,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:42,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687295737] [2021-11-03 05:16:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:42,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:42,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:42,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:16:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:43,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:16:43,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:43,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:43,394 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 05:16:43,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:43,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687295737] [2021-11-03 05:16:43,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687295737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:43,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:43,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:16:43,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251498354] [2021-11-03 05:16:43,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:16:43,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:16:43,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:16:43,397 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:43,515 INFO L93 Difference]: Finished difference Result 349 states and 432 transitions. [2021-11-03 05:16:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:16:43,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 05:16:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:43,518 INFO L225 Difference]: With dead ends: 349 [2021-11-03 05:16:43,518 INFO L226 Difference]: Without dead ends: 247 [2021-11-03 05:16:43,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:16:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-03 05:16:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 137. [2021-11-03 05:16:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 136 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2021-11-03 05:16:43,530 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 50 [2021-11-03 05:16:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:43,530 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2021-11-03 05:16:43,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2021-11-03 05:16:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:16:43,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:43,532 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] [2021-11-03 05:16:43,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:43,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:16:43,751 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1963585782, now seen corresponding path program 1 times [2021-11-03 05:16:43,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:43,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788067815] [2021-11-03 05:16:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:43,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:43,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:43,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:43,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:16:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:44,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 05:16:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:44,680 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 05:16:44,684 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 05:16:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:44,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:45,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:45,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788067815] [2021-11-03 05:16:45,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788067815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:45,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143356433] [2021-11-03 05:16:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:45,106 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:16:45,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:16:45,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 05:16:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:16:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:16:45,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:16:45,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143356433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:45,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:16:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 14 [2021-11-03 05:16:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615506343] [2021-11-03 05:16:45,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:16:45,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:16:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:16:45,933 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:46,134 INFO L93 Difference]: Finished difference Result 411 states and 504 transitions. [2021-11-03 05:16:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:16:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 05:16:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:46,137 INFO L225 Difference]: With dead ends: 411 [2021-11-03 05:16:46,137 INFO L226 Difference]: Without dead ends: 308 [2021-11-03 05:16:46,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:16:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-03 05:16:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 137. [2021-11-03 05:16:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 130 states have (on average 1.323076923076923) internal successors, (172), 136 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 172 transitions. [2021-11-03 05:16:46,148 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 172 transitions. Word has length 52 [2021-11-03 05:16:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:46,149 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 172 transitions. [2021-11-03 05:16:46,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:16:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 172 transitions. [2021-11-03 05:16:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:16:46,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:46,150 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:46,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:46,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:16:46,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:46,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:16:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1322921012, now seen corresponding path program 1 times [2021-11-03 05:16:46,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:16:46,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082754133] [2021-11-03 05:16:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:46,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:16:46,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:16:46,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:16:46,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:16:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:47,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:16:47,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:47,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:47,899 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 05:16:47,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:47,908 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 05:16:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:48,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:48,969 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:16:48,969 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 05:16:48,979 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:16:48,979 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 05:16:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:49,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:49,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082754133] [2021-11-03 05:16:49,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082754133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:49,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [22052160] [2021-11-03 05:16:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:49,073 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:49,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:16:49,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:16:49,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 05:16:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:49,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 05:16:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:50,240 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 05:16:50,240 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 05:16:56,569 WARN L207 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-11-03 05:16:56,569 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-03 05:16:56,570 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 05:18:30,940 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 05:18:30,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:32,533 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 05:18:32,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [22052160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:32,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:18:32,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [11, 10] total 30 [2021-11-03 05:18:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983351456] [2021-11-03 05:18:32,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:18:32,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:18:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:18:32,537 INFO L87 Difference]: Start difference. First operand 137 states and 172 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:41,019 INFO L93 Difference]: Finished difference Result 211 states and 263 transitions. [2021-11-03 05:18:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:18:41,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 05:18:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:41,023 INFO L225 Difference]: With dead ends: 211 [2021-11-03 05:18:41,023 INFO L226 Difference]: Without dead ends: 139 [2021-11-03 05:18:41,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 05:18:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-03 05:18:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-11-03 05:18:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 137 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 173 transitions. [2021-11-03 05:18:41,045 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 173 transitions. Word has length 53 [2021-11-03 05:18:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:41,045 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 173 transitions. [2021-11-03 05:18:41,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 173 transitions. [2021-11-03 05:18:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:18:41,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:41,051 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:41,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-03 05:18:41,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 05:18:41,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:41,457 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:18:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:41,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1324768054, now seen corresponding path program 1 times [2021-11-03 05:18:41,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:41,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555110271] [2021-11-03 05:18:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:41,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:41,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:41,459 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:41,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:18:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:18:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:42,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:42,983 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 05:18:42,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:42,990 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 05:18:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:43,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:44,019 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:18:44,019 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 05:18:44,044 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:18:44,045 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 05:18:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:44,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:44,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555110271] [2021-11-03 05:18:44,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555110271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:18:44,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [704465844] [2021-11-03 05:18:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:44,170 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:44,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:18:44,176 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:18:44,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 05:18:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 05:18:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:45,493 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-03 05:18:45,494 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 05:18:46,372 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 05:18:46,495 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 05:18:46,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:47,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2021-11-03 05:18:47,456 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 05:18:47,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [704465844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:47,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:18:47,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [11, 10] total 31 [2021-11-03 05:18:47,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587421149] [2021-11-03 05:18:47,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 05:18:47,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 05:18:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-11-03 05:18:47,460 INFO L87 Difference]: Start difference. First operand 138 states and 173 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:50,227 INFO L93 Difference]: Finished difference Result 405 states and 514 transitions. [2021-11-03 05:18:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:18:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 05:18:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:50,230 INFO L225 Difference]: With dead ends: 405 [2021-11-03 05:18:50,230 INFO L226 Difference]: Without dead ends: 288 [2021-11-03 05:18:50,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 05:18:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-03 05:18:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 144. [2021-11-03 05:18:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 1.3065693430656935) internal successors, (179), 143 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2021-11-03 05:18:50,251 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 53 [2021-11-03 05:18:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2021-11-03 05:18:50,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2021-11-03 05:18:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:18:50,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:50,253 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:50,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-03 05:18:50,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:50,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:50,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:18:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1195191880, now seen corresponding path program 1 times [2021-11-03 05:18:50,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:50,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014251435] [2021-11-03 05:18:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:50,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:50,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:50,660 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:50,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:18:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:18:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:52,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:52,201 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 05:18:52,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:52,208 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 05:18:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:52,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:53,410 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:18:53,410 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 05:18:53,422 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:18:53,422 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 05:18:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:53,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:53,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014251435] [2021-11-03 05:18:53,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014251435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:18:53,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1854305330] [2021-11-03 05:18:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:53,518 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:53,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:18:53,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:18:53,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:18:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 05:18:54,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:54,830 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 05:18:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 05:18:54,908 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 05:18:54,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 05:20:21,008 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 05:20:21,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:22,624 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 05:20:22,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1854305330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:22,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:20:22,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 9] imperfect sequences [11, 10] total 33 [2021-11-03 05:20:22,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097647955] [2021-11-03 05:20:22,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 05:20:22,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:22,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 05:20:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 05:20:22,627 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:37,518 INFO L93 Difference]: Finished difference Result 422 states and 532 transitions. [2021-11-03 05:20:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 05:20:37,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 05:20:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:37,524 INFO L225 Difference]: With dead ends: 422 [2021-11-03 05:20:37,525 INFO L226 Difference]: Without dead ends: 331 [2021-11-03 05:20:37,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=297, Invalid=1865, Unknown=0, NotChecked=0, Total=2162 [2021-11-03 05:20:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-03 05:20:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 172. [2021-11-03 05:20:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 165 states have (on average 1.284848484848485) internal successors, (212), 171 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2021-11-03 05:20:37,558 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 53 [2021-11-03 05:20:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:37,559 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2021-11-03 05:20:37,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2021-11-03 05:20:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:20:37,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:37,561 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:37,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:37,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 05:20:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:37,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:20:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -515133510, now seen corresponding path program 1 times [2021-11-03 05:20:37,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:37,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9371843] [2021-11-03 05:20:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:37,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:37,970 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:37,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:20:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:20:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:39,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:20:39,868 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 05:20:39,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:20:39,880 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 05:20:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:40,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:41,088 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:20:41,088 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 05:20:41,109 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:20:41,109 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 05:20:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:41,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:41,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9371843] [2021-11-03 05:20:41,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9371843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:41,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [376919150] [2021-11-03 05:20:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:41,232 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:20:41,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:20:41,245 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:20:41,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:20:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 05:20:42,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:42,950 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 05:20:42,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-03 05:20:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:48,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:50,838 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 177 treesize of output 169 [2021-11-03 05:20:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:51,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [376919150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:51,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195096867] [2021-11-03 05:20:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:51,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:20:51,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:20:51,190 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:20:51,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 05:20:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:52,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 05:20:52,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:54,400 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 05:20:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:55,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:20:55,199 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 05:20:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:55,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195096867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:55,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:20:55,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12, 12, 11, 11] total 48 [2021-11-03 05:20:55,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811591361] [2021-11-03 05:20:55,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-03 05:20:55,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-03 05:20:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-11-03 05:20:55,941 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:27,456 WARN L207 SmtUtils]: Spent 6.86 s on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-11-03 05:21:50,983 WARN L207 SmtUtils]: Spent 22.88 s on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-11-03 05:22:07,224 WARN L207 SmtUtils]: Spent 15.57 s on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-11-03 05:22:26,164 WARN L207 SmtUtils]: Spent 17.76 s on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-11-03 05:22:42,429 WARN L207 SmtUtils]: Spent 15.88 s on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2021-11-03 05:23:06,106 WARN L207 SmtUtils]: Spent 22.81 s on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-11-03 05:23:29,024 WARN L207 SmtUtils]: Spent 21.67 s on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-11-03 05:23:50,537 WARN L207 SmtUtils]: Spent 21.07 s on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-11-03 05:24:12,502 WARN L207 SmtUtils]: Spent 21.25 s on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-11-03 05:24:32,192 WARN L207 SmtUtils]: Spent 18.98 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-11-03 05:24:45,112 WARN L207 SmtUtils]: Spent 12.34 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-11-03 05:25:05,537 WARN L207 SmtUtils]: Spent 19.28 s on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-11-03 05:25:26,679 WARN L207 SmtUtils]: Spent 19.90 s on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-11-03 05:25:47,745 WARN L207 SmtUtils]: Spent 19.26 s on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-11-03 05:26:05,585 WARN L207 SmtUtils]: Spent 17.17 s on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-11-03 05:26:24,296 WARN L207 SmtUtils]: Spent 18.09 s on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-11-03 05:26:39,623 WARN L207 SmtUtils]: Spent 14.63 s on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-11-03 05:27:13,506 WARN L207 SmtUtils]: Spent 24.90 s on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-11-03 05:27:30,059 WARN L207 SmtUtils]: Spent 15.90 s on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-11-03 05:27:44,640 WARN L207 SmtUtils]: Spent 13.84 s on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-11-03 05:27:59,729 WARN L207 SmtUtils]: Spent 13.96 s on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-11-03 05:28:07,926 WARN L207 SmtUtils]: Spent 6.55 s on a formula simplification that was a NOOP. DAG size: 66 [2021-11-03 05:28:28,369 WARN L207 SmtUtils]: Spent 15.42 s on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2021-11-03 05:28:46,128 WARN L207 SmtUtils]: Spent 17.09 s on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-11-03 05:29:07,413 WARN L207 SmtUtils]: Spent 19.68 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-11-03 05:29:28,407 WARN L207 SmtUtils]: Spent 20.22 s on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-11-03 05:29:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:29,654 INFO L93 Difference]: Finished difference Result 696 states and 842 transitions. [2021-11-03 05:29:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-03 05:29:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 05:29:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:29,663 INFO L225 Difference]: With dead ends: 696 [2021-11-03 05:29:29,663 INFO L226 Difference]: Without dead ends: 573 [2021-11-03 05:29:29,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 501.2s TimeCoverageRelationStatistics Valid=1148, Invalid=5494, Unknown=0, NotChecked=0, Total=6642 [2021-11-03 05:29:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-03 05:29:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 201. [2021-11-03 05:29:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.268041237113402) internal successors, (246), 200 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 246 transitions. [2021-11-03 05:29:29,704 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 246 transitions. Word has length 53 [2021-11-03 05:29:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:29,704 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 246 transitions. [2021-11-03 05:29:29,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.875) internal successors, (234), 48 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 246 transitions. [2021-11-03 05:29:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:29:29,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:29,706 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:29:29,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 05:29:29,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-03 05:29:30,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:29:30,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:29:30,315 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:29:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1117845546, now seen corresponding path program 1 times [2021-11-03 05:29:30,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:29:30,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503667866] [2021-11-03 05:29:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:30,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:29:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:29:30,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:29:30,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:29:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:29:31,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:29:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:29:31,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:29:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:29:31,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:29:31,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503667866] [2021-11-03 05:29:31,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503667866] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:31,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:31,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:29:31,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302639643] [2021-11-03 05:29:31,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:31,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:29:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:31,737 INFO L87 Difference]: Start difference. First operand 201 states and 246 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:31,905 INFO L93 Difference]: Finished difference Result 419 states and 514 transitions. [2021-11-03 05:29:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:31,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 05:29:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:31,909 INFO L225 Difference]: With dead ends: 419 [2021-11-03 05:29:31,909 INFO L226 Difference]: Without dead ends: 265 [2021-11-03 05:29:31,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:29:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-03 05:29:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 201. [2021-11-03 05:29:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 194 states have (on average 1.2422680412371134) internal successors, (241), 200 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 241 transitions. [2021-11-03 05:29:31,952 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 241 transitions. Word has length 61 [2021-11-03 05:29:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:31,952 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 241 transitions. [2021-11-03 05:29:31,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 241 transitions. [2021-11-03 05:29:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:29:31,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:31,954 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:29:31,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:29:32,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:29:32,154 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:29:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash -268357848, now seen corresponding path program 2 times [2021-11-03 05:29:32,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:29:32,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756513363] [2021-11-03 05:29:32,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:29:32,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:29:32,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:29:32,158 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:29:32,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:29:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 05:29:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:29:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 05:29:33,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:29:34,195 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 05:29:34,200 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 05:29:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:29:34,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:29:34,912 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-03 05:29:34,913 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 05:29:34,922 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-03 05:29:34,922 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 05:29:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:29:34,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:29:34,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756513363] [2021-11-03 05:29:34,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756513363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:34,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:34,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 11 [2021-11-03 05:29:34,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953673298] [2021-11-03 05:29:34,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:29:34,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:29:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:29:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:29:34,960 INFO L87 Difference]: Start difference. First operand 201 states and 241 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:36,931 INFO L93 Difference]: Finished difference Result 500 states and 609 transitions. [2021-11-03 05:29:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:29:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 05:29:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:36,935 INFO L225 Difference]: With dead ends: 500 [2021-11-03 05:29:36,935 INFO L226 Difference]: Without dead ends: 390 [2021-11-03 05:29:36,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:29:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-03 05:29:36,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 273. [2021-11-03 05:29:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.2067669172932332) internal successors, (321), 272 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 321 transitions. [2021-11-03 05:29:36,984 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 321 transitions. Word has length 61 [2021-11-03 05:29:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:36,984 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 321 transitions. [2021-11-03 05:29:36,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 321 transitions. [2021-11-03 05:29:36,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:29:36,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:36,985 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:29:37,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:29:37,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:29:37,191 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:29:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1297163236, now seen corresponding path program 1 times [2021-11-03 05:29:37,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:29:37,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175031240] [2021-11-03 05:29:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:37,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:29:37,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:29:37,193 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:29:37,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:29:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:29:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:29:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:29:38,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:29:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:29:38,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:29:38,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175031240] [2021-11-03 05:29:38,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175031240] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:38,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:38,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:29:38,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394715260] [2021-11-03 05:29:38,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:38,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:29:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:38,683 INFO L87 Difference]: Start difference. First operand 273 states and 321 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:38,791 INFO L93 Difference]: Finished difference Result 386 states and 463 transitions. [2021-11-03 05:29:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:38,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 05:29:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:38,794 INFO L225 Difference]: With dead ends: 386 [2021-11-03 05:29:38,794 INFO L226 Difference]: Without dead ends: 204 [2021-11-03 05:29:38,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:29:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-03 05:29:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-03 05:29:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.2081218274111676) internal successors, (238), 203 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2021-11-03 05:29:38,841 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 61 [2021-11-03 05:29:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2021-11-03 05:29:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2021-11-03 05:29:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 05:29:38,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:38,843 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:29:38,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:29:39,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:29:39,053 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:29:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:39,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1659914854, now seen corresponding path program 1 times [2021-11-03 05:29:39,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:29:39,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050391409] [2021-11-03 05:29:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:39,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:29:39,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:29:39,055 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:29:39,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:29:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:29:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:29:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:29:40,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:29:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 05:29:40,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:29:40,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050391409] [2021-11-03 05:29:40,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050391409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:40,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:40,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:29:40,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296306244] [2021-11-03 05:29:40,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:40,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:29:40,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:40,588 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:40,694 INFO L93 Difference]: Finished difference Result 317 states and 376 transitions. [2021-11-03 05:29:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:29:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 05:29:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:40,696 INFO L225 Difference]: With dead ends: 317 [2021-11-03 05:29:40,696 INFO L226 Difference]: Without dead ends: 167 [2021-11-03 05:29:40,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:29:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-03 05:29:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-11-03 05:29:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 157 states have (on average 1.2229299363057324) internal successors, (192), 163 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2021-11-03 05:29:40,740 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 61 [2021-11-03 05:29:40,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:40,740 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2021-11-03 05:29:40,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2021-11-03 05:29:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:29:40,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:40,742 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:29:40,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:29:40,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:29:40,965 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 05:29:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:40,966 INFO L85 PathProgramCache]: Analyzing trace with hash -414228359, now seen corresponding path program 1 times [2021-11-03 05:29:40,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:29:40,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929866024] [2021-11-03 05:29:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:40,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:29:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:29:40,968 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:29:40,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:29:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 05:29:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:29:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:29:44,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:29:50,136 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-03 05:29:50,137 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 05:29:50,815 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-03 05:29:50,815 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 05:29:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:29:53,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:29:53,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929866024] [2021-11-03 05:29:53,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929866024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:29:53,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [219951871] [2021-11-03 05:29:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:53,336 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:29:53,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:29:53,338 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:29:53,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e41086-2b9c-4b7b-94eb-0e2d33dfd6cd/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 05:29:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:55,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-03 05:29:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:29:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:29:55,976 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 05:29:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:29:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:29:55,998 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 05:30:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:30:00,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:30:00,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:30:00,763 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-11-03 05:30:00,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 119 treesize of output 86 [2021-11-03 05:30:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:30:01,251 INFO L328 TraceCheckSpWp]: Computing backward predicates...