./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--fcoe--fcoe.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--fcoe--fcoe.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P --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 a3ff87c3e5fb8bea0460b71e9b9f7b5386599503dd506c0803db0e63f978b184 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:14:47,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:14:47,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:14:47,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:14:47,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:14:47,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:14:47,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:14:47,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:14:47,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:14:47,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:14:47,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:14:47,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:14:47,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:14:47,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:14:47,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:14:47,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:14:47,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:14:47,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:14:47,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:14:47,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:14:47,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:14:47,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:14:47,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:14:47,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:14:47,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:14:47,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:14:47,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:14:47,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:14:47,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:14:47,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:14:47,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:14:47,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:14:47,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:14:47,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:14:47,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:14:47,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:14:47,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:14:47,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:14:47,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:14:47,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:14:47,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:14:47,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:14:47,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:14:47,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:14:47,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:14:47,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:14:47,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:14:47,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:14:47,982 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:14:47,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:14:47,983 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:14:47,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:14:47,984 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:14:47,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:14:47,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:14:47,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:14:47,986 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:14:47,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:14:47,987 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:14:47,987 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:14:47,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:14:47,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:14:47,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:14:47,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:14:47,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:14:47,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:14:47,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:14:47,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:14:47,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:14:47,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:14:47,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:14:47,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:47,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:14:47,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:14:47,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:14:47,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:14:47,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:14:47,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:14:47,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:14:47,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:14:47,996 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_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3ff87c3e5fb8bea0460b71e9b9f7b5386599503dd506c0803db0e63f978b184 [2021-11-21 01:14:48,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:14:48,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:14:48,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:14:48,343 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:14:48,344 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:14:48,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--fcoe--fcoe.ko-entry_point.cil.out.i [2021-11-21 01:14:48,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/data/e2d5c9d56/1d4dcf70cf8b40519a94fab314139b7b/FLAG7826c8d36 [2021-11-21 01:14:49,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:14:49,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--fcoe--fcoe.ko-entry_point.cil.out.i [2021-11-21 01:14:49,744 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/data/e2d5c9d56/1d4dcf70cf8b40519a94fab314139b7b/FLAG7826c8d36 [2021-11-21 01:14:49,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/data/e2d5c9d56/1d4dcf70cf8b40519a94fab314139b7b [2021-11-21 01:14:49,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:14:49,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:14:49,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:49,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:14:49,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:14:49,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f7f2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:49, skipping insertion in model container [2021-11-21 01:14:49,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:49" (1/1) ... [2021-11-21 01:14:49,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:14:50,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:14:54,208 WARN L230 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_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--fcoe--fcoe.ko-entry_point.cil.out.i[413960,413973] [2021-11-21 01:14:54,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:54,328 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:14:55,160 WARN L230 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_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--fcoe--fcoe.ko-entry_point.cil.out.i[413960,413973] [2021-11-21 01:14:55,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:55,548 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:14:55,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55 WrapperNode [2021-11-21 01:14:55,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:55,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:55,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:14:55,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:14:55,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:55,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,095 INFO L137 Inliner]: procedures = 420, calls = 2205, calls flagged for inlining = 207, calls inlined = 186, statements flattened = 6279 [2021-11-21 01:14:56,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:56,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:14:56,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:14:56,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:14:56,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:14:56,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:14:56,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:14:56,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:14:56,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (1/1) ... [2021-11-21 01:14:56,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:56,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:56,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:14:56,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:14:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ddp_done [2021-11-21 01:14:56,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ddp_done [2021-11-21 01:14:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_get_wwn [2021-11-21 01:14:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_get_wwn [2021-11-21 01:14:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure fc_lport_bsg_request [2021-11-21 01:14:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_lport_bsg_request [2021-11-21 01:14:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-21 01:14:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_hostlist_del [2021-11-21 01:14:56,541 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_hostlist_del [2021-11-21 01:14:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure wake_up_process [2021-11-21 01:14:56,541 INFO L138 BoogieDeclarations]: Found implementation of procedure wake_up_process [2021-11-21 01:14:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:14:56,541 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:14:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2021-11-21 01:14:56,542 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2021-11-21 01:14:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-21 01:14:56,542 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-21 01:14:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure fc_frame_header_get [2021-11-21 01:14:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_frame_header_get [2021-11-21 01:14:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:14:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:14:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_netdev [2021-11-21 01:14:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_netdev [2021-11-21 01:14:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_recv_flogi [2021-11-21 01:14:56,544 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_recv_flogi [2021-11-21 01:14:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure fc_vport_setlink [2021-11-21 01:14:56,544 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_vport_setlink [2021-11-21 01:14:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure fc_eh_abort [2021-11-21 01:14:56,545 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_eh_abort [2021-11-21 01:14:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-21 01:14:56,545 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-21 01:14:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_dev_from_skb [2021-11-21 01:14:56,546 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_dev_from_skb [2021-11-21 01:14:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_scsi_host_template_4 [2021-11-21 01:14:56,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_scsi_host_template_4 [2021-11-21 01:14:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_percpu_thread_create [2021-11-21 01:14:56,546 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_percpu_thread_create [2021-11-21 01:14:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_device_priv [2021-11-21 01:14:56,547 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_device_priv [2021-11-21 01:14:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure __preempt_count_sub [2021-11-21 01:14:56,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __preempt_count_sub [2021-11-21 01:14:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_link_ok [2021-11-21 01:14:56,548 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_link_ok [2021-11-21 01:14:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 01:14:56,548 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 01:14:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_vport_destroy [2021-11-21 01:14:56,548 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_vport_destroy [2021-11-21 01:14:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_alloc [2021-11-21 01:14:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_alloc [2021-11-21 01:14:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure fc_get_host_port_state [2021-11-21 01:14:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_get_host_port_state [2021-11-21 01:14:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure fc_release_transport [2021-11-21 01:14:56,550 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_release_transport [2021-11-21 01:14:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_reset [2021-11-21 01:14:56,550 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_reset [2021-11-21 01:14:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-21 01:14:56,551 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-21 01:14:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 01:14:56,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 01:14:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_link_speed_update [2021-11-21 01:14:56,551 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_link_speed_update [2021-11-21 01:14:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_xmit [2021-11-21 01:14:56,552 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_xmit [2021-11-21 01:14:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure fc_fabric_logoff [2021-11-21 01:14:56,552 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_fabric_logoff [2021-11-21 01:14:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:14:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure fc_frame_payload_get [2021-11-21 01:14:56,553 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_frame_payload_get [2021-11-21 01:14:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-21 01:14:56,553 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-21 01:14:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_interface_remove [2021-11-21 01:14:56,554 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_interface_remove [2021-11-21 01:14:56,554 INFO L130 BoogieDeclarations]: Found specification of procedure fc_exch_mgr_alloc [2021-11-21 01:14:56,554 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_exch_mgr_alloc [2021-11-21 01:14:56,554 INFO L130 BoogieDeclarations]: Found specification of procedure is_fip_mode [2021-11-21 01:14:56,554 INFO L138 BoogieDeclarations]: Found implementation of procedure is_fip_mode [2021-11-21 01:14:56,555 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_check_wait_queue [2021-11-21 01:14:56,555 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_check_wait_queue [2021-11-21 01:14:56,555 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-21 01:14:56,555 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-21 01:14:56,555 INFO L130 BoogieDeclarations]: Found specification of procedure fc_fabric_login [2021-11-21 01:14:56,556 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_fabric_login [2021-11-21 01:14:56,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:14:56,556 INFO L130 BoogieDeclarations]: Found specification of procedure cpu_maps_update_done [2021-11-21 01:14:56,556 INFO L138 BoogieDeclarations]: Found implementation of procedure cpu_maps_update_done [2021-11-21 01:14:56,556 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ddp_target [2021-11-21 01:14:56,557 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ddp_target [2021-11-21 01:14:56,557 INFO L130 BoogieDeclarations]: Found specification of procedure fc_set_rport_loss_tmo [2021-11-21 01:14:56,557 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_set_rport_loss_tmo [2021-11-21 01:14:56,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:14:56,558 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ddp_setup [2021-11-21 01:14:56,558 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ddp_setup [2021-11-21 01:14:56,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:14:56,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:14:56,558 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:14:56,559 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_wwn_from_mac [2021-11-21 01:14:56,559 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_wwn_from_mac [2021-11-21 01:14:56,559 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-21 01:14:56,559 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-21 01:14:56,559 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2021-11-21 01:14:56,560 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2021-11-21 01:14:56,560 INFO L130 BoogieDeclarations]: Found specification of procedure fc_attach_transport [2021-11-21 01:14:56,560 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_attach_transport [2021-11-21 01:14:56,560 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_hostlist_lookup_port [2021-11-21 01:14:56,560 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_hostlist_lookup_port [2021-11-21 01:14:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure dcb_getapp [2021-11-21 01:14:56,561 INFO L138 BoogieDeclarations]: Found implementation of procedure dcb_getapp [2021-11-21 01:14:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure fc_rport_terminate_io [2021-11-21 01:14:56,561 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_rport_terminate_io [2021-11-21 01:14:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-21 01:14:56,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-21 01:14:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure _fcoe_create [2021-11-21 01:14:56,664 INFO L138 BoogieDeclarations]: Found implementation of procedure _fcoe_create [2021-11-21 01:14:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure fc_exch_mgr_free [2021-11-21 01:14:56,665 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_exch_mgr_free [2021-11-21 01:14:56,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 01:14:56,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 01:14:56,665 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-21 01:14:56,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-21 01:14:56,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:14:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure dcb_ieee_getapp_mask [2021-11-21 01:14:56,666 INFO L138 BoogieDeclarations]: Found implementation of procedure dcb_ieee_getapp_mask [2021-11-21 01:14:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:14:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure fc_set_mfs [2021-11-21 01:14:56,666 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_set_mfs [2021-11-21 01:14:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:14:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-21 01:14:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_host_put [2021-11-21 01:14:56,667 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_host_put [2021-11-21 01:14:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:14:56,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-21 01:14:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_link_up [2021-11-21 01:14:56,668 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_link_up [2021-11-21 01:14:56,668 INFO L130 BoogieDeclarations]: Found specification of procedure lport_priv [2021-11-21 01:14:56,668 INFO L138 BoogieDeclarations]: Found implementation of procedure lport_priv [2021-11-21 01:14:56,668 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_netdev_features_change [2021-11-21 01:14:56,668 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_netdev_features_change [2021-11-21 01:14:56,668 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_disable [2021-11-21 01:14:56,668 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_disable [2021-11-21 01:14:56,668 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-21 01:14:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-21 01:14:56,669 INFO L130 BoogieDeclarations]: Found specification of procedure fc_vport_set_state [2021-11-21 01:14:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_vport_set_state [2021-11-21 01:14:56,669 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_clean_pending_queue [2021-11-21 01:14:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_clean_pending_queue [2021-11-21 01:14:56,669 INFO L130 BoogieDeclarations]: Found specification of procedure synchronize_net [2021-11-21 01:14:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure synchronize_net [2021-11-21 01:14:56,670 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_enabled [2021-11-21 01:14:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_enabled [2021-11-21 01:14:56,670 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_link_down [2021-11-21 01:14:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_link_down [2021-11-21 01:14:56,670 INFO L130 BoogieDeclarations]: Found specification of procedure shost_priv [2021-11-21 01:14:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure shost_priv [2021-11-21 01:14:56,670 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-11-21 01:14:56,671 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-11-21 01:14:56,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:14:56,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:14:56,671 INFO L130 BoogieDeclarations]: Found specification of procedure eth_hdr [2021-11-21 01:14:56,673 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_hdr [2021-11-21 01:14:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-21 01:14:56,673 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-21 01:14:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-21 01:14:56,674 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-21 01:14:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure fc_frame_payload_op [2021-11-21 01:14:56,674 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_frame_payload_op [2021-11-21 01:14:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_get_lesb [2021-11-21 01:14:56,675 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_get_lesb [2021-11-21 01:14:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:14:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:14:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:14:56,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:14:56,676 INFO L130 BoogieDeclarations]: Found specification of procedure fc_elsct_send [2021-11-21 01:14:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_elsct_send [2021-11-21 01:14:56,676 INFO L130 BoogieDeclarations]: Found specification of procedure vlan_dev_vlan_id [2021-11-21 01:14:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure vlan_dev_vlan_id [2021-11-21 01:14:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure fc_queuecommand [2021-11-21 01:14:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_queuecommand [2021-11-21 01:14:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-21 01:14:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-21 01:14:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2021-11-21 01:14:56,678 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2021-11-21 01:14:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-21 01:14:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-21 01:14:56,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-21 01:14:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_flush_workqueue_17 [2021-11-21 01:14:56,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_flush_workqueue_17 [2021-11-21 01:14:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-21 01:14:56,679 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-21 01:14:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure fc_get_host_speed [2021-11-21 01:14:56,680 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_get_host_speed [2021-11-21 01:14:56,680 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_head_init [2021-11-21 01:14:56,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_head_init [2021-11-21 01:14:56,680 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_interface_create [2021-11-21 01:14:56,680 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_interface_create [2021-11-21 01:14:56,681 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 01:14:56,681 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 01:14:56,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 01:14:56,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 01:14:56,682 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_destroy [2021-11-21 01:14:56,682 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_destroy [2021-11-21 01:14:56,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:14:56,682 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:14:56,682 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:14:56,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:14:56,683 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_priv [2021-11-21 01:14:56,683 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_priv [2021-11-21 01:14:56,683 INFO L130 BoogieDeclarations]: Found specification of procedure dev_uc_del [2021-11-21 01:14:56,683 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_uc_del [2021-11-21 01:14:56,684 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_destroy [2021-11-21 01:14:56,684 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_destroy [2021-11-21 01:14:56,684 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-21 01:14:56,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-21 01:14:56,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_2 [2021-11-21 01:14:56,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_2 [2021-11-21 01:14:56,685 INFO L130 BoogieDeclarations]: Found specification of procedure fc_eh_device_reset [2021-11-21 01:14:56,685 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_eh_device_reset [2021-11-21 01:14:56,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:14:56,685 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-21 01:14:56,686 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-21 01:14:56,686 INFO L130 BoogieDeclarations]: Found specification of procedure fc_set_wwpn [2021-11-21 01:14:56,686 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_set_wwpn [2021-11-21 01:14:56,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:14:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-21 01:14:56,687 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-21 01:14:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_tail [2021-11-21 01:14:56,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_tail [2021-11-21 01:14:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_percpu_thread_destroy [2021-11-21 01:14:56,688 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_percpu_thread_destroy [2021-11-21 01:14:56,688 INFO L130 BoogieDeclarations]: Found specification of procedure __pskb_pull_tail [2021-11-21 01:14:56,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __pskb_pull_tail [2021-11-21 01:14:56,688 INFO L130 BoogieDeclarations]: Found specification of procedure is_zero_ether_addr [2021-11-21 01:14:56,688 INFO L138 BoogieDeclarations]: Found implementation of procedure is_zero_ether_addr [2021-11-21 01:14:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_interface_cleanup [2021-11-21 01:14:56,689 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_interface_cleanup [2021-11-21 01:14:56,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:14:56,710 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u16~0~X~$Pointer$~X~int~TO~int [2021-11-21 01:14:56,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u16~0~X~$Pointer$~X~int~TO~int [2021-11-21 01:14:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-11-21 01:14:56,711 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-11-21 01:14:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure dev_add_pack [2021-11-21 01:14:56,711 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_add_pack [2021-11-21 01:14:56,712 INFO L130 BoogieDeclarations]: Found specification of procedure fc_set_wwnn [2021-11-21 01:14:56,712 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_set_wwnn [2021-11-21 01:14:56,712 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-21 01:14:56,712 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-21 01:14:56,713 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-21 01:14:56,713 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-21 01:14:56,713 INFO L130 BoogieDeclarations]: Found specification of procedure fc_get_host_stats [2021-11-21 01:14:56,713 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_get_host_stats [2021-11-21 01:14:56,720 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_enable [2021-11-21 01:14:56,721 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_enable [2021-11-21 01:14:56,721 INFO L130 BoogieDeclarations]: Found specification of procedure ntoh24 [2021-11-21 01:14:56,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ntoh24 [2021-11-21 01:14:56,721 INFO L130 BoogieDeclarations]: Found specification of procedure dev_uc_add [2021-11-21 01:14:56,722 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_uc_add [2021-11-21 01:14:56,723 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-21 01:14:56,723 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-21 01:14:56,723 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u16~0~TO~int [2021-11-21 01:14:56,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u16~0~TO~int [2021-11-21 01:14:56,724 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_if_destroy [2021-11-21 01:14:56,724 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_if_destroy [2021-11-21 01:14:56,724 INFO L130 BoogieDeclarations]: Found specification of procedure dev_put [2021-11-21 01:14:56,724 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_put [2021-11-21 01:14:56,724 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_interface_setup [2021-11-21 01:14:56,725 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_interface_setup [2021-11-21 01:14:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_2 [2021-11-21 01:14:56,725 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_2 [2021-11-21 01:14:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:14:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_if_create [2021-11-21 01:14:56,726 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_if_create [2021-11-21 01:14:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_ctlr_device_delete [2021-11-21 01:14:56,726 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_ctlr_device_delete [2021-11-21 01:14:56,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:14:56,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:14:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure dev_mc_add [2021-11-21 01:14:56,727 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_mc_add [2021-11-21 01:14:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 01:14:56,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 01:14:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2021-11-21 01:14:56,728 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2021-11-21 01:14:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-21 01:14:56,728 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-21 01:14:56,728 INFO L130 BoogieDeclarations]: Found specification of procedure __preempt_count_add [2021-11-21 01:14:56,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __preempt_count_add [2021-11-21 01:14:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_port_send [2021-11-21 01:14:56,729 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_port_send [2021-11-21 01:14:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure fc_eh_host_reset [2021-11-21 01:14:56,729 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_eh_host_reset [2021-11-21 01:14:56,729 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_destroy_work [2021-11-21 01:14:56,730 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_destroy_work [2021-11-21 01:14:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-21 01:14:56,730 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-21 01:14:56,730 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_check [2021-11-21 01:14:56,730 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_check [2021-11-21 01:14:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_nonlinear [2021-11-21 01:14:56,731 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_nonlinear [2021-11-21 01:14:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure fc_slave_alloc [2021-11-21 01:14:56,731 INFO L138 BoogieDeclarations]: Found implementation of procedure fc_slave_alloc [2021-11-21 01:14:56,731 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-21 01:14:56,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ffs [2021-11-21 01:14:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure fcoe_elsct_send [2021-11-21 01:14:56,732 INFO L138 BoogieDeclarations]: Found implementation of procedure fcoe_elsct_send [2021-11-21 01:14:56,732 INFO L130 BoogieDeclarations]: Found specification of procedure vlan_dev_real_dev [2021-11-21 01:14:56,732 INFO L138 BoogieDeclarations]: Found implementation of procedure vlan_dev_real_dev [2021-11-21 01:14:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure cpu_maps_update_begin [2021-11-21 01:14:56,733 INFO L138 BoogieDeclarations]: Found implementation of procedure cpu_maps_update_begin [2021-11-21 01:14:56,733 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-21 01:14:56,733 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-21 01:14:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure dev_mc_del [2021-11-21 01:14:56,734 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_mc_del [2021-11-21 01:14:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_remove_pack [2021-11-21 01:14:56,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_remove_pack [2021-11-21 01:14:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:14:56,735 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-21 01:14:56,735 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-21 01:14:57,979 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:14:57,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:14:58,717 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:15:06,352 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:15:09,815 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:15:09,815 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:15:09,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:15:09 BoogieIcfgContainer [2021-11-21 01:15:09,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:15:09,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:15:09,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:15:09,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:15:09,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:14:49" (1/3) ... [2021-11-21 01:15:09,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66df83f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:15:09, skipping insertion in model container [2021-11-21 01:15:09,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:55" (2/3) ... [2021-11-21 01:15:09,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66df83f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:15:09, skipping insertion in model container [2021-11-21 01:15:09,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:15:09" (3/3) ... [2021-11-21 01:15:09,837 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--fcoe--fcoe.ko-entry_point.cil.out.i [2021-11-21 01:15:09,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:15:09,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:15:09,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:15:09,959 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 [2021-11-21 01:15:09,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:15:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 1810 states, 1094 states have (on average 1.3491773308957953) internal successors, (1476), 1153 states have internal predecessors, (1476), 567 states have call successors, (567), 148 states have call predecessors, (567), 147 states have return successors, (554), 544 states have call predecessors, (554), 554 states have call successors, (554) [2021-11-21 01:15:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-21 01:15:10,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:10,083 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:10,083 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1167434265, now seen corresponding path program 1 times [2021-11-21 01:15:10,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:10,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403277073] [2021-11-21 01:15:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:10,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1747 trivial. 0 not checked. [2021-11-21 01:15:11,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:11,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403277073] [2021-11-21 01:15:11,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403277073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:11,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:11,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:15:11,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322554060] [2021-11-21 01:15:11,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:11,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:15:11,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:15:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:11,718 INFO L87 Difference]: Start difference. First operand has 1810 states, 1094 states have (on average 1.3491773308957953) internal successors, (1476), 1153 states have internal predecessors, (1476), 567 states have call successors, (567), 148 states have call predecessors, (567), 147 states have return successors, (554), 544 states have call predecessors, (554), 554 states have call successors, (554) Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:15:13,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:18,308 INFO L93 Difference]: Finished difference Result 5114 states and 7428 transitions. [2021-11-21 01:15:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 327 [2021-11-21 01:15:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:18,373 INFO L225 Difference]: With dead ends: 5114 [2021-11-21 01:15:18,373 INFO L226 Difference]: Without dead ends: 3331 [2021-11-21 01:15:18,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:18,398 INFO L933 BasicCegarLoop]: 2957 mSDtfsCounter, 2246 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2246 SdHoareTripleChecker+Valid, 5197 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:18,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2246 Valid, 5197 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-21 01:15:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2021-11-21 01:15:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 3326. [2021-11-21 01:15:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 2035 states have (on average 1.3444717444717444) internal successors, (2736), 2120 states have internal predecessors, (2736), 1011 states have call successors, (1011), 280 states have call predecessors, (1011), 279 states have return successors, (1036), 989 states have call predecessors, (1036), 1009 states have call successors, (1036) [2021-11-21 01:15:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4783 transitions. [2021-11-21 01:15:18,995 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4783 transitions. Word has length 327 [2021-11-21 01:15:19,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:19,004 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 4783 transitions. [2021-11-21 01:15:19,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:15:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4783 transitions. [2021-11-21 01:15:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-21 01:15:19,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:19,032 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:19,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:15:19,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash 104794519, now seen corresponding path program 1 times [2021-11-21 01:15:19,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:19,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473666472] [2021-11-21 01:15:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:19,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1747 trivial. 0 not checked. [2021-11-21 01:15:19,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:19,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473666472] [2021-11-21 01:15:19,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473666472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:19,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:19,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:15:19,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504490925] [2021-11-21 01:15:19,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:19,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:15:19,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:15:19,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:19,610 INFO L87 Difference]: Start difference. First operand 3326 states and 4783 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 01:15:21,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:26,736 INFO L93 Difference]: Finished difference Result 9786 states and 14055 transitions. [2021-11-21 01:15:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:15:26,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 357 [2021-11-21 01:15:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:26,816 INFO L225 Difference]: With dead ends: 9786 [2021-11-21 01:15:26,816 INFO L226 Difference]: Without dead ends: 6525 [2021-11-21 01:15:26,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:15:26,843 INFO L933 BasicCegarLoop]: 2796 mSDtfsCounter, 2413 mSDsluCounter, 2544 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2413 SdHoareTripleChecker+Valid, 5059 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:26,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2413 Valid, 5059 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 589 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-21 01:15:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6525 states. [2021-11-21 01:15:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6525 to 6510. [2021-11-21 01:15:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6510 states, 3984 states have (on average 1.3458835341365463) internal successors, (5362), 4156 states have internal predecessors, (5362), 1969 states have call successors, (1969), 557 states have call predecessors, (1969), 556 states have return successors, (2019), 1924 states have call predecessors, (2019), 1967 states have call successors, (2019) [2021-11-21 01:15:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6510 states to 6510 states and 9350 transitions. [2021-11-21 01:15:27,349 INFO L78 Accepts]: Start accepts. Automaton has 6510 states and 9350 transitions. Word has length 357 [2021-11-21 01:15:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:27,354 INFO L470 AbstractCegarLoop]: Abstraction has 6510 states and 9350 transitions. [2021-11-21 01:15:27,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 01:15:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6510 states and 9350 transitions. [2021-11-21 01:15:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-21 01:15:27,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:27,379 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:27,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:15:27,379 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:27,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1607159923, now seen corresponding path program 1 times [2021-11-21 01:15:27,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:27,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079778900] [2021-11-21 01:15:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:27,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2021-11-21 01:15:28,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:28,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079778900] [2021-11-21 01:15:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079778900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100091939] [2021-11-21 01:15:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:28,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:28,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:28,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:28,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:15:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:30,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 5617 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:15:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-21 01:15:31,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:15:31,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100091939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:31,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:15:31,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:15:31,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942879782] [2021-11-21 01:15:31,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:31,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:31,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:31,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:31,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:15:31,900 INFO L87 Difference]: Start difference. First operand 6510 states and 9350 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-21 01:15:33,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:36,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:37,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:50,289 INFO L93 Difference]: Finished difference Result 19352 states and 28028 transitions. [2021-11-21 01:15:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:15:50,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 442 [2021-11-21 01:15:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:50,432 INFO L225 Difference]: With dead ends: 19352 [2021-11-21 01:15:50,433 INFO L226 Difference]: Without dead ends: 12907 [2021-11-21 01:15:50,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:15:50,485 INFO L933 BasicCegarLoop]: 3311 mSDtfsCounter, 2527 mSDsluCounter, 5367 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2527 SdHoareTripleChecker+Valid, 7833 SdHoareTripleChecker+Invalid, 3456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:50,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2527 Valid, 7833 Invalid, 3456 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 3438 Invalid, 1 Unknown, 0 Unchecked, 17.7s Time] [2021-11-21 01:15:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12907 states. [2021-11-21 01:15:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12907 to 12842. [2021-11-21 01:15:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12842 states, 7876 states have (on average 1.3484002031488065) internal successors, (10620), 8228 states have internal predecessors, (10620), 3867 states have call successors, (3867), 1099 states have call predecessors, (3867), 1098 states have return successors, (4113), 3766 states have call predecessors, (4113), 3865 states have call successors, (4113) [2021-11-21 01:15:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12842 states to 12842 states and 18600 transitions. [2021-11-21 01:15:51,544 INFO L78 Accepts]: Start accepts. Automaton has 12842 states and 18600 transitions. Word has length 442 [2021-11-21 01:15:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:51,546 INFO L470 AbstractCegarLoop]: Abstraction has 12842 states and 18600 transitions. [2021-11-21 01:15:51,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-21 01:15:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 12842 states and 18600 transitions. [2021-11-21 01:15:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-21 01:15:51,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:51,575 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:51,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:15:51,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:51,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:51,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1732836321, now seen corresponding path program 1 times [2021-11-21 01:15:51,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:51,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438873243] [2021-11-21 01:15:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:51,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2021-11-21 01:15:52,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438873243] [2021-11-21 01:15:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438873243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7018583] [2021-11-21 01:15:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:52,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:52,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:52,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:15:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:54,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 5619 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:15:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-21 01:15:56,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:15:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7018583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:56,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:15:56,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-21 01:15:56,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864316223] [2021-11-21 01:15:56,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:56,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:15:56,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:15:56,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:15:56,061 INFO L87 Difference]: Start difference. First operand 12842 states and 18600 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-21 01:16:10,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:10,379 INFO L93 Difference]: Finished difference Result 25664 states and 37250 transitions. [2021-11-21 01:16:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:16:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 443 [2021-11-21 01:16:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:10,652 INFO L225 Difference]: With dead ends: 25664 [2021-11-21 01:16:10,652 INFO L226 Difference]: Without dead ends: 12887 [2021-11-21 01:16:10,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:10,731 INFO L933 BasicCegarLoop]: 3272 mSDtfsCounter, 2501 mSDsluCounter, 7610 mSDsCounter, 0 mSdLazyCounter, 3638 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2501 SdHoareTripleChecker+Valid, 9851 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:10,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2501 Valid, 9851 Invalid, 3652 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 3638 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2021-11-21 01:16:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12887 states. [2021-11-21 01:16:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12887 to 12822. [2021-11-21 01:16:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12822 states, 7868 states have (on average 1.3472292831723436) internal successors, (10600), 8216 states have internal predecessors, (10600), 3855 states have call successors, (3855), 1099 states have call predecessors, (3855), 1098 states have return successors, (4077), 3754 states have call predecessors, (4077), 3853 states have call successors, (4077) [2021-11-21 01:16:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12822 states to 12822 states and 18532 transitions. [2021-11-21 01:16:11,710 INFO L78 Accepts]: Start accepts. Automaton has 12822 states and 18532 transitions. Word has length 443 [2021-11-21 01:16:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:11,713 INFO L470 AbstractCegarLoop]: Abstraction has 12822 states and 18532 transitions. [2021-11-21 01:16:11,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-21 01:16:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 12822 states and 18532 transitions. [2021-11-21 01:16:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-11-21 01:16:11,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:11,742 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:11,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:16:11,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:11,964 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:11,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 371942525, now seen corresponding path program 1 times [2021-11-21 01:16:11,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:11,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459043287] [2021-11-21 01:16:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:11,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-21 01:16:12,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:12,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459043287] [2021-11-21 01:16:12,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459043287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:12,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:12,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:16:12,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375196785] [2021-11-21 01:16:12,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:12,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:16:12,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:16:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:12,606 INFO L87 Difference]: Start difference. First operand 12822 states and 18532 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 5 states have call predecessors, (54), 4 states have call successors, (54) [2021-11-21 01:16:14,656 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:28,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:30,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:32,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:39,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:59,099 INFO L93 Difference]: Finished difference Result 30409 states and 44799 transitions. [2021-11-21 01:16:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:16:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 5 states have call predecessors, (54), 4 states have call successors, (54) Word has length 422 [2021-11-21 01:16:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:59,220 INFO L225 Difference]: With dead ends: 30409 [2021-11-21 01:16:59,220 INFO L226 Difference]: Without dead ends: 17652 [2021-11-21 01:16:59,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:16:59,281 INFO L933 BasicCegarLoop]: 2939 mSDtfsCounter, 4464 mSDsluCounter, 7956 mSDsCounter, 0 mSdLazyCounter, 16661 mSolverCounterSat, 4089 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5047 SdHoareTripleChecker+Valid, 9828 SdHoareTripleChecker+Invalid, 20755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4089 IncrementalHoareTripleChecker+Valid, 16661 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:59,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5047 Valid, 9828 Invalid, 20755 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4089 Valid, 16661 Invalid, 5 Unknown, 0 Unchecked, 45.3s Time] [2021-11-21 01:16:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17652 states. [2021-11-21 01:17:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17652 to 17555. [2021-11-21 01:17:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17555 states, 10569 states have (on average 1.3255747942094807) internal successors, (14010), 11035 states have internal predecessors, (14010), 5375 states have call successors, (5375), 1507 states have call predecessors, (5375), 1610 states have return successors, (6433), 5372 states have call predecessors, (6433), 5373 states have call successors, (6433) [2021-11-21 01:17:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17555 states to 17555 states and 25818 transitions. [2021-11-21 01:17:00,543 INFO L78 Accepts]: Start accepts. Automaton has 17555 states and 25818 transitions. Word has length 422 [2021-11-21 01:17:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:00,545 INFO L470 AbstractCegarLoop]: Abstraction has 17555 states and 25818 transitions. [2021-11-21 01:17:00,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 5 states have call predecessors, (54), 4 states have call successors, (54) [2021-11-21 01:17:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 17555 states and 25818 transitions. [2021-11-21 01:17:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-21 01:17:00,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:00,574 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:00,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:17:00,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:17:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash -530001334, now seen corresponding path program 1 times [2021-11-21 01:17:00,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:00,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43139616] [2021-11-21 01:17:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:00,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2021-11-21 01:17:01,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:01,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43139616] [2021-11-21 01:17:01,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43139616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:17:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338830470] [2021-11-21 01:17:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:01,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:17:01,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:17:01,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:17:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:17:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 5624 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:17:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-21 01:17:04,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:17:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338830470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:04,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:17:04,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 01:17:04,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855132733] [2021-11-21 01:17:04,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:04,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:17:04,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:17:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:17:04,069 INFO L87 Difference]: Start difference. First operand 17555 states and 25818 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-21 01:17:06,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:17,380 INFO L93 Difference]: Finished difference Result 46344 states and 68042 transitions. [2021-11-21 01:17:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:17:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 447 [2021-11-21 01:17:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:17,556 INFO L225 Difference]: With dead ends: 46344 [2021-11-21 01:17:17,556 INFO L226 Difference]: Without dead ends: 28867 [2021-11-21 01:17:17,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:17:17,630 INFO L933 BasicCegarLoop]: 3031 mSDtfsCounter, 1481 mSDsluCounter, 8012 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 9974 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:17,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 9974 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2889 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2021-11-21 01:17:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-11-21 01:17:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28859. [2021-11-21 01:17:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28859 states, 17043 states have (on average 1.2983629642668544) internal successors, (22128), 17739 states have internal predecessors, (22128), 8905 states have call successors, (8905), 2703 states have call predecessors, (8905), 2910 states have return successors, (10663), 8976 states have call predecessors, (10663), 8903 states have call successors, (10663) [2021-11-21 01:17:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28859 states to 28859 states and 41696 transitions. [2021-11-21 01:17:19,857 INFO L78 Accepts]: Start accepts. Automaton has 28859 states and 41696 transitions. Word has length 447 [2021-11-21 01:17:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:19,858 INFO L470 AbstractCegarLoop]: Abstraction has 28859 states and 41696 transitions. [2021-11-21 01:17:19,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (64), 4 states have call predecessors, (64), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-21 01:17:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28859 states and 41696 transitions. [2021-11-21 01:17:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-21 01:17:19,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:19,893 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:19,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:17:20,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:17:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash 935275120, now seen corresponding path program 1 times [2021-11-21 01:17:20,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:20,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717981795] [2021-11-21 01:17:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:20,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-11-21 01:17:20,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:20,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717981795] [2021-11-21 01:17:20,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717981795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:20,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:20,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:17:20,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087167091] [2021-11-21 01:17:20,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:20,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:17:20,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:17:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:17:20,693 INFO L87 Difference]: Start difference. First operand 28859 states and 41696 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 5 states have call predecessors, (54), 4 states have call successors, (54) [2021-11-21 01:17:25,609 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:27,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:39,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:42,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:45,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:47,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:49,917 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:51,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:06,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:10,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:13,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:15,391 INFO L93 Difference]: Finished difference Result 54334 states and 78842 transitions. [2021-11-21 01:18:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:18:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 5 states have call predecessors, (54), 4 states have call successors, (54) Word has length 423 [2021-11-21 01:18:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:15,532 INFO L225 Difference]: With dead ends: 54334 [2021-11-21 01:18:15,532 INFO L226 Difference]: Without dead ends: 25529 [2021-11-21 01:18:15,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:18:15,645 INFO L933 BasicCegarLoop]: 2505 mSDtfsCounter, 4779 mSDsluCounter, 7100 mSDsCounter, 0 mSdLazyCounter, 16111 mSolverCounterSat, 4225 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5383 SdHoareTripleChecker+Valid, 8728 SdHoareTripleChecker+Invalid, 20345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4225 IncrementalHoareTripleChecker+Valid, 16111 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:15,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5383 Valid, 8728 Invalid, 20345 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4225 Valid, 16111 Invalid, 9 Unknown, 0 Unchecked, 53.1s Time] [2021-11-21 01:18:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25529 states. [2021-11-21 01:18:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25529 to 25393. [2021-11-21 01:18:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25393 states, 15065 states have (on average 1.3048788582807833) internal successors, (19658), 15693 states have internal predecessors, (19658), 7829 states have call successors, (7829), 2291 states have call predecessors, (7829), 2498 states have return successors, (9433), 7912 states have call predecessors, (9433), 7827 states have call successors, (9433) [2021-11-21 01:18:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25393 states to 25393 states and 36920 transitions. [2021-11-21 01:18:17,594 INFO L78 Accepts]: Start accepts. Automaton has 25393 states and 36920 transitions. Word has length 423 [2021-11-21 01:18:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:17,596 INFO L470 AbstractCegarLoop]: Abstraction has 25393 states and 36920 transitions. [2021-11-21 01:18:17,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (58), 4 states have call predecessors, (58), 3 states have return successors, (54), 5 states have call predecessors, (54), 4 states have call successors, (54) [2021-11-21 01:18:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 25393 states and 36920 transitions. [2021-11-21 01:18:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-21 01:18:17,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:17,622 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:17,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:18:17,623 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash 724661905, now seen corresponding path program 1 times [2021-11-21 01:18:17,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18052522] [2021-11-21 01:18:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:17,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1759 trivial. 0 not checked. [2021-11-21 01:18:18,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18052522] [2021-11-21 01:18:18,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18052522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:18,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:18,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:18:18,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020428843] [2021-11-21 01:18:18,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:18,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:18:18,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:18:18,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:18:18,094 INFO L87 Difference]: Start difference. First operand 25393 states and 36920 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-21 01:18:20,143 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:26,305 INFO L93 Difference]: Finished difference Result 73318 states and 106444 transitions. [2021-11-21 01:18:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:18:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 437 [2021-11-21 01:18:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:26,566 INFO L225 Difference]: With dead ends: 73318 [2021-11-21 01:18:26,567 INFO L226 Difference]: Without dead ends: 48003 [2021-11-21 01:18:26,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:18:26,675 INFO L933 BasicCegarLoop]: 2807 mSDtfsCounter, 2317 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 5052 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:26,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2317 Valid, 5052 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 609 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-21 01:18:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48003 states. [2021-11-21 01:18:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48003 to 47986. [2021-11-21 01:18:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47986 states, 28404 states have (on average 1.3022109562033517) internal successors, (36988), 29610 states have internal predecessors, (36988), 14734 states have call successors, (14734), 4432 states have call predecessors, (14734), 4847 states have return successors, (17884), 14911 states have call predecessors, (17884), 14732 states have call successors, (17884) [2021-11-21 01:18:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47986 states to 47986 states and 69606 transitions. [2021-11-21 01:18:29,771 INFO L78 Accepts]: Start accepts. Automaton has 47986 states and 69606 transitions. Word has length 437 [2021-11-21 01:18:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:29,773 INFO L470 AbstractCegarLoop]: Abstraction has 47986 states and 69606 transitions. [2021-11-21 01:18:29,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-21 01:18:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47986 states and 69606 transitions. [2021-11-21 01:18:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-21 01:18:29,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:29,800 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:29,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:18:29,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:29,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1424263414, now seen corresponding path program 1 times [2021-11-21 01:18:29,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:29,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883096378] [2021-11-21 01:18:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:29,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2021-11-21 01:18:30,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883096378] [2021-11-21 01:18:30,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883096378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:18:30,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773955914] [2021-11-21 01:18:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:30,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:18:30,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:30,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:18:30,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:18:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 5937 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:18:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1767 trivial. 0 not checked. [2021-11-21 01:18:33,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:18:33,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773955914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:33,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:18:33,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-21 01:18:33,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041946564] [2021-11-21 01:18:33,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:33,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:18:33,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:33,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:18:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:18:33,819 INFO L87 Difference]: Start difference. First operand 47986 states and 69606 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-21 01:18:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:40,993 INFO L93 Difference]: Finished difference Result 142961 states and 207214 transitions. [2021-11-21 01:18:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:18:40,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 475 [2021-11-21 01:18:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:41,997 INFO L225 Difference]: With dead ends: 142961 [2021-11-21 01:18:41,997 INFO L226 Difference]: Without dead ends: 95053 [2021-11-21 01:18:42,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:18:42,218 INFO L933 BasicCegarLoop]: 2929 mSDtfsCounter, 2470 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2470 SdHoareTripleChecker+Valid, 5114 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:42,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2470 Valid, 5114 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-21 01:18:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95053 states. [2021-11-21 01:18:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95053 to 95036. [2021-11-21 01:18:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95036 states, 56176 states have (on average 1.2996297351182) internal successors, (73008), 58536 states have internal predecessors, (73008), 29186 states have call successors, (29186), 8842 states have call predecessors, (29186), 9673 states have return successors, (35488), 29545 states have call predecessors, (35488), 29184 states have call successors, (35488) [2021-11-21 01:18:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95036 states to 95036 states and 137682 transitions. [2021-11-21 01:18:47,624 INFO L78 Accepts]: Start accepts. Automaton has 95036 states and 137682 transitions. Word has length 475 [2021-11-21 01:18:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:47,625 INFO L470 AbstractCegarLoop]: Abstraction has 95036 states and 137682 transitions. [2021-11-21 01:18:47,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-21 01:18:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 95036 states and 137682 transitions. [2021-11-21 01:18:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-11-21 01:18:47,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:47,671 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:47,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:18:47,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:18:47,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 639605117, now seen corresponding path program 1 times [2021-11-21 01:18:47,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:47,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265585754] [2021-11-21 01:18:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:47,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3511 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3507 trivial. 0 not checked. [2021-11-21 01:18:48,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:48,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265585754] [2021-11-21 01:18:48,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265585754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:48,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:48,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:18:48,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961772017] [2021-11-21 01:18:48,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:48,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:18:48,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:18:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:18:48,326 INFO L87 Difference]: Start difference. First operand 95036 states and 137682 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-21 01:18:50,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:18:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:59,405 INFO L93 Difference]: Finished difference Result 190095 states and 275405 transitions. [2021-11-21 01:18:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:18:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 508 [2021-11-21 01:18:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:00,337 INFO L225 Difference]: With dead ends: 190095 [2021-11-21 01:19:00,337 INFO L226 Difference]: Without dead ends: 95089 [2021-11-21 01:19:00,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:19:00,644 INFO L933 BasicCegarLoop]: 2280 mSDtfsCounter, 10 mSDsluCounter, 5119 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6829 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:00,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6829 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 868 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2021-11-21 01:19:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95089 states. [2021-11-21 01:19:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95089 to 95039. [2021-11-21 01:19:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95039 states, 56179 states have (on average 1.2993289307392442) internal successors, (72995), 58539 states have internal predecessors, (72995), 29186 states have call successors, (29186), 8842 states have call predecessors, (29186), 9673 states have return successors, (35488), 29545 states have call predecessors, (35488), 29184 states have call successors, (35488) [2021-11-21 01:19:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95039 states to 95039 states and 137669 transitions. [2021-11-21 01:19:05,622 INFO L78 Accepts]: Start accepts. Automaton has 95039 states and 137669 transitions. Word has length 508 [2021-11-21 01:19:05,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:05,623 INFO L470 AbstractCegarLoop]: Abstraction has 95039 states and 137669 transitions. [2021-11-21 01:19:05,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-21 01:19:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 95039 states and 137669 transitions. [2021-11-21 01:19:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-11-21 01:19:05,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:05,667 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:05,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:19:05,668 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2088718872, now seen corresponding path program 1 times [2021-11-21 01:19:05,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:19:05,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107693102] [2021-11-21 01:19:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:05,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:19:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1772 trivial. 0 not checked. [2021-11-21 01:19:06,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:19:06,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107693102] [2021-11-21 01:19:06,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107693102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:19:06,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645834166] [2021-11-21 01:19:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:06,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:06,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:06,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:19:06,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f578fe5-8bd5-4871-8d7b-da342e99e2ba/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:19:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 5676 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:19:08,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2021-11-21 01:19:09,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:19:09,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645834166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:09,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:19:09,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-21 01:19:09,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531210613] [2021-11-21 01:19:09,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:09,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:19:09,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:19:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:19:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:19:09,393 INFO L87 Difference]: Start difference. First operand 95039 states and 137669 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-21 01:19:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:20,023 INFO L93 Difference]: Finished difference Result 221649 states and 320631 transitions. [2021-11-21 01:19:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:19:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 493 [2021-11-21 01:19:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:21,069 INFO L225 Difference]: With dead ends: 221649 [2021-11-21 01:19:21,069 INFO L226 Difference]: Without dead ends: 186988 [2021-11-21 01:19:21,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:19:21,653 INFO L933 BasicCegarLoop]: 3152 mSDtfsCounter, 2466 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 5274 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:21,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2466 Valid, 5274 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-21 01:19:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186988 states.