./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--sg.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V --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 884b97cc6fb4051ca91e84ac99a2a164f2566357f30136c91fcf54410ed45574 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:40:58,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:40:58,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:40:58,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:40:58,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:40:58,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:40:58,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:40:58,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:40:58,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:40:58,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:40:58,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:40:58,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:40:58,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:40:58,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:40:58,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:40:58,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:40:58,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:40:58,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:40:58,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:40:58,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:40:58,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:40:58,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:40:58,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:40:58,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:40:58,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:40:58,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:40:58,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:40:58,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:40:58,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:40:58,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:40:58,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:40:58,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:40:58,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:40:58,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:40:58,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:40:58,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:40:58,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:40:58,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:40:58,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:40:58,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:40:58,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:40:58,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:40:58,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:40:58,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:40:58,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:40:58,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:40:58,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:40:58,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:40:58,974 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:40:58,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:40:58,975 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:40:58,975 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:40:58,976 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:40:58,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:40:58,977 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:40:58,977 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:40:58,978 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:40:58,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:40:58,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:40:58,979 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:40:58,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:40:58,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:40:58,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:40:58,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:40:58,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:40:58,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:40:58,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:40:58,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:40:58,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:40:58,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:40:58,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:40:58,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:58,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:40:58,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:40:58,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:40:58,986 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:40:58,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:40:58,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:40:58,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:40:58,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:40:58,988 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_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884b97cc6fb4051ca91e84ac99a2a164f2566357f30136c91fcf54410ed45574 [2021-11-23 02:40:59,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:40:59,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:40:59,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:40:59,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:40:59,336 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:40:59,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i [2021-11-23 02:40:59,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/data/1ae5b07ee/ce4785db303647959fef8ef44206b26c/FLAGfbbdd9781 [2021-11-23 02:41:00,495 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:41:00,495 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i [2021-11-23 02:41:00,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/data/1ae5b07ee/ce4785db303647959fef8ef44206b26c/FLAGfbbdd9781 [2021-11-23 02:41:00,797 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/data/1ae5b07ee/ce4785db303647959fef8ef44206b26c [2021-11-23 02:41:00,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:41:00,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:41:00,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:41:00,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:41:00,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:41:00,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:00" (1/1) ... [2021-11-23 02:41:00,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e80df29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:00, skipping insertion in model container [2021-11-23 02:41:00,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:00" (1/1) ... [2021-11-23 02:41:00,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:41:01,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:41:04,085 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_94b8b3fe-add7-4394-b390-db0c709f6c95/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i[397949,397962] [2021-11-23 02:41:04,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:41:04,266 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:41:05,047 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_94b8b3fe-add7-4394-b390-db0c709f6c95/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i[397949,397962] [2021-11-23 02:41:05,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:41:05,229 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:41:05,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05 WrapperNode [2021-11-23 02:41:05,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:41:05,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:41:05,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:41:05,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:41:05,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:05,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:05,770 INFO L137 Inliner]: procedures = 332, calls = 2835, calls flagged for inlining = 154, calls inlined = 147, statements flattened = 8636 [2021-11-23 02:41:05,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:41:05,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:41:05,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:41:05,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:41:05,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:05,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:05,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:05,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:06,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:06,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:06,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:06,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:41:06,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:41:06,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:41:06,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:41:06,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (1/1) ... [2021-11-23 02:41:06,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:41:06,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:06,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:41:06,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:41:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 02:41:06,359 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 02:41:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure sg_finish_rem_req [2021-11-23 02:41:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_finish_rem_req [2021-11-23 02:41:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 02:41:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 02:41:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure sg_rq_end_io_usercontext [2021-11-23 02:41:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_rq_end_io_usercontext [2021-11-23 02:41:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2021-11-23 02:41:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2021-11-23 02:41:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:41:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:41:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:41:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:41:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure seq_puts [2021-11-23 02:41:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_puts [2021-11-23 02:41:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:41:06,362 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:41:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-23 02:41:06,362 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-23 02:41:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure srp_done [2021-11-23 02:41:06,362 INFO L138 BoogieDeclarations]: Found implementation of procedure srp_done [2021-11-23 02:41:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-23 02:41:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-23 02:41:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 02:41:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 02:41:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:41:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:41:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:41:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:41:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2021-11-23 02:41:06,364 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2021-11-23 02:41:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-23 02:41:06,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-23 02:41:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure sg_mmap [2021-11-23 02:41:06,364 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_mmap [2021-11-23 02:41:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2021-11-23 02:41:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2021-11-23 02:41:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure sg_res_in_use [2021-11-23 02:41:06,365 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_res_in_use [2021-11-23 02:41:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:41:06,366 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:41:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:41:06,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:41:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure sg_poll [2021-11-23 02:41:06,366 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_poll [2021-11-23 02:41:06,367 INFO L130 BoogieDeclarations]: Found specification of procedure __put_user_bad [2021-11-23 02:41:06,367 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_2 [2021-11-23 02:41:06,367 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_2 [2021-11-23 02:41:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure max_sectors_bytes [2021-11-23 02:41:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure max_sectors_bytes [2021-11-23 02:41:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_device_put [2021-11-23 02:41:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_device_put [2021-11-23 02:41:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:41:06,370 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:41:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:41:06,370 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:41:06,370 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:41:06,370 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:41:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure sg_remove_request [2021-11-23 02:41:06,371 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_remove_request [2021-11-23 02:41:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-23 02:41:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-23 02:41:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_lock_irqsave [2021-11-23 02:41:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_lock_irqsave [2021-11-23 02:41:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure sg_common_write [2021-11-23 02:41:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_common_write [2021-11-23 02:41:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:41:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:41:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:41:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:41:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure remove_proc_entry [2021-11-23 02:41:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_proc_entry [2021-11-23 02:41:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 02:41:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:41:06,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:41:06,374 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irq [2021-11-23 02:41:06,375 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irq [2021-11-23 02:41:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure sg_proc_write_adio [2021-11-23 02:41:06,375 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_proc_write_adio [2021-11-23 02:41:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2021-11-23 02:41:06,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2021-11-23 02:41:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:41:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:41:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_seq_operations_7 [2021-11-23 02:41:06,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_seq_operations_7 [2021-11-23 02:41:06,377 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-23 02:41:06,377 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-23 02:41:06,377 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2021-11-23 02:41:06,378 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2021-11-23 02:41:06,378 INFO L130 BoogieDeclarations]: Found specification of procedure __chk_range_not_ok [2021-11-23 02:41:06,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __chk_range_not_ok [2021-11-23 02:41:06,379 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-23 02:41:06,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-23 02:41:06,380 INFO L130 BoogieDeclarations]: Found specification of procedure dev_seq_stop [2021-11-23 02:41:06,380 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_seq_stop [2021-11-23 02:41:06,380 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-23 02:41:06,380 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-23 02:41:06,380 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:41:06,380 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:41:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 02:41:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 02:41:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:41:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:41:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:41:06,382 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:41:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure sg_get_rq_mark [2021-11-23 02:41:06,382 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_get_rq_mark [2021-11-23 02:41:06,382 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-23 02:41:06,382 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-23 02:41:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:41:06,384 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:41:06,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:41:06,387 INFO L130 BoogieDeclarations]: Found specification of procedure blk_trace_startstop [2021-11-23 02:41:06,387 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_trace_startstop [2021-11-23 02:41:06,387 INFO L130 BoogieDeclarations]: Found specification of procedure sg_allow_access [2021-11-23 02:41:06,389 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_allow_access [2021-11-23 02:41:06,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:41:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure __rwlock_init [2021-11-23 02:41:06,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __rwlock_init [2021-11-23 02:41:06,391 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2021-11-23 02:41:06,397 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2021-11-23 02:41:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure dev_seq_start [2021-11-23 02:41:06,398 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_seq_start [2021-11-23 02:41:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure seq_open [2021-11-23 02:41:06,398 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_open [2021-11-23 02:41:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-23 02:41:06,398 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-23 02:41:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:41:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2021-11-23 02:41:06,399 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2021-11-23 02:41:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user [2021-11-23 02:41:06,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user [2021-11-23 02:41:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:41:06,399 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:41:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure sg_lookup_dev [2021-11-23 02:41:06,400 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_lookup_dev [2021-11-23 02:41:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure sg_remove_sfp_usercontext [2021-11-23 02:41:06,400 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_remove_sfp_usercontext [2021-11-23 02:41:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure sg_remove_scat [2021-11-23 02:41:06,401 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_remove_scat [2021-11-23 02:41:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure sg_fasync [2021-11-23 02:41:06,401 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_fasync [2021-11-23 02:41:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2021-11-23 02:41:06,401 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2021-11-23 02:41:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:41:06,402 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:41:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure kill_fasync [2021-11-23 02:41:06,402 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_fasync [2021-11-23 02:41:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure __get_user_bad [2021-11-23 02:41:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-11-23 02:41:06,402 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-11-23 02:41:06,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:41:06,403 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:41:06,403 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:41:06,403 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-23 02:41:06,403 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2021-11-23 02:41:06,403 INFO L130 BoogieDeclarations]: Found specification of procedure seq_release [2021-11-23 02:41:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_release [2021-11-23 02:41:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_unlock_irqrestore [2021-11-23 02:41:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_unlock_irqrestore [2021-11-23 02:41:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 02:41:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 02:41:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:41:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:41:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-23 02:41:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-23 02:41:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure sg_new_write [2021-11-23 02:41:06,406 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_new_write [2021-11-23 02:41:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure copy_user_generic [2021-11-23 02:41:06,406 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_user_generic [2021-11-23 02:41:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:41:06,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:41:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:41:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:41:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:41:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2021-11-23 02:41:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2021-11-23 02:41:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:41:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock_irqsave [2021-11-23 02:41:06,408 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock_irqsave [2021-11-23 02:41:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:41:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure queue_max_segments [2021-11-23 02:41:06,408 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_max_segments [2021-11-23 02:41:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:41:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure sg_write [2021-11-23 02:41:06,409 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_write [2021-11-23 02:41:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:41:06,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:41:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure kref_init [2021-11-23 02:41:06,410 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_init [2021-11-23 02:41:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irqrestore [2021-11-23 02:41:06,410 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irqrestore [2021-11-23 02:41:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2021-11-23 02:41:06,410 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2021-11-23 02:41:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure dev_seq_next [2021-11-23 02:41:06,411 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_seq_next [2021-11-23 02:41:06,411 INFO L130 BoogieDeclarations]: Found specification of procedure sg_new_read [2021-11-23 02:41:06,411 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_new_read [2021-11-23 02:41:06,411 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:41:06,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:41:06,412 INFO L130 BoogieDeclarations]: Found specification of procedure sg_build_reserve [2021-11-23 02:41:06,412 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_build_reserve [2021-11-23 02:41:06,412 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-23 02:41:06,412 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-23 02:41:06,412 INFO L130 BoogieDeclarations]: Found specification of procedure sg_add_request [2021-11-23 02:41:06,412 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_add_request [2021-11-23 02:41:06,412 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-23 02:41:06,413 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-23 02:41:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add_return [2021-11-23 02:41:06,413 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add_return [2021-11-23 02:41:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure sg_proc_write_dressz [2021-11-23 02:41:06,413 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_proc_write_dressz [2021-11-23 02:41:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-23 02:41:06,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-23 02:41:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure sg_build_indirect [2021-11-23 02:41:06,414 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_build_indirect [2021-11-23 02:41:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:41:06,414 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:41:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_from_user [2021-11-23 02:41:06,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_from_user [2021-11-23 02:41:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-23 02:41:06,415 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-23 02:41:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-23 02:41:06,415 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-23 02:41:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul_from_user [2021-11-23 02:41:06,416 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul_from_user [2021-11-23 02:41:06,416 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:41:06,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:41:06,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:41:06,416 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_unlock [2021-11-23 02:41:06,416 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_unlock [2021-11-23 02:41:06,417 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:41:06,417 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:41:06,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:41:06,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:41:06,417 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_read_lock [2021-11-23 02:41:06,418 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_read_lock [2021-11-23 02:41:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 02:41:06,423 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 02:41:07,582 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:41:07,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:41:07,866 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:41:07,915 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5379: SUMMARY for call __copy_to_user_nocheck_#t~ret199#1 := ldv__builtin_expect((if 0 != __copy_to_user_nocheck_~ret~2#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:41:07,916 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5379-1: assume -9223372036854775808 <= __copy_to_user_nocheck_#t~ret199#1 && __copy_to_user_nocheck_#t~ret199#1 <= 9223372036854775807;__copy_to_user_nocheck_~tmp___1~4#1 := __copy_to_user_nocheck_#t~ret199#1;havoc __copy_to_user_nocheck_#t~ret199#1; [2021-11-23 02:41:07,916 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5367: SUMMARY for call __copy_to_user_nocheck_#t~ret198#1 := ldv__builtin_expect((if 0 != __copy_to_user_nocheck_~ret~2#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:41:07,916 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5367-1: assume -9223372036854775808 <= __copy_to_user_nocheck_#t~ret198#1 && __copy_to_user_nocheck_#t~ret198#1 <= 9223372036854775807;__copy_to_user_nocheck_~tmp___0~8#1 := __copy_to_user_nocheck_#t~ret198#1;havoc __copy_to_user_nocheck_#t~ret198#1; [2021-11-23 02:41:07,916 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5388: assume __copy_to_user_nocheck_#t~switch197#1; [2021-11-23 02:41:07,917 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5388: assume !__copy_to_user_nocheck_#t~switch197#1; [2021-11-23 02:41:07,917 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5347: havoc __copy_to_user_nocheck_#t~switch197#1; [2021-11-23 02:41:07,917 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5380: assume 0 != __copy_to_user_nocheck_~tmp___1~4#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,917 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5380: assume !(0 != __copy_to_user_nocheck_~tmp___1~4#1);__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,917 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5376: assume __copy_to_user_nocheck_#t~switch197#1; [2021-11-23 02:41:07,918 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5376: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := true; [2021-11-23 02:41:07,918 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5368: assume 0 != __copy_to_user_nocheck_~tmp___0~8#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,918 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5368: assume !(0 != __copy_to_user_nocheck_~tmp___0~8#1);__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,918 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5364: assume __copy_to_user_nocheck_#t~switch197#1; [2021-11-23 02:41:07,918 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5364: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 16 == __copy_to_user_nocheck_~size#1; [2021-11-23 02:41:07,919 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5360: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,919 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5360: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 10 == __copy_to_user_nocheck_~size#1; [2021-11-23 02:41:07,919 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5389: SUMMARY for call __copy_to_user_nocheck_#t~ret200#1 := copy_user_generic(__copy_to_user_nocheck_~dst#1.base, __copy_to_user_nocheck_~dst#1.offset, __copy_to_user_nocheck_~src#1.base, __copy_to_user_nocheck_~src#1.offset, __copy_to_user_nocheck_~size#1); srcloc: null [2021-11-23 02:41:07,919 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5356: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,919 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5356: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 8 == __copy_to_user_nocheck_~size#1; [2021-11-23 02:41:07,919 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5389-1: __copy_to_user_nocheck_~tmp___2~4#1 := __copy_to_user_nocheck_#t~ret200#1;havoc __copy_to_user_nocheck_#t~ret200#1;__copy_to_user_nocheck_#res#1 := (if __copy_to_user_nocheck_~tmp___2~4#1 % 18446744073709551616 % 4294967296 <= 2147483647 then __copy_to_user_nocheck_~tmp___2~4#1 % 18446744073709551616 % 4294967296 else __copy_to_user_nocheck_~tmp___2~4#1 % 18446744073709551616 % 4294967296 - 4294967296); [2021-11-23 02:41:07,920 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##1: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,920 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5352: assume __copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#res#1 := __copy_to_user_nocheck_~ret~2#1; [2021-11-23 02:41:07,920 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5352: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 4 == __copy_to_user_nocheck_~size#1; [2021-11-23 02:41:07,920 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##2: assume !__copy_to_user_nocheck_#t~switch197#1;__copy_to_user_nocheck_#t~switch197#1 := __copy_to_user_nocheck_#t~switch197#1 || 2 == __copy_to_user_nocheck_~size#1; [2021-11-23 02:41:11,846 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5312-1: assume -9223372036854775808 <= __copy_from_user_nocheck_#t~ret193#1 && __copy_from_user_nocheck_#t~ret193#1 <= 9223372036854775807;__copy_from_user_nocheck_~tmp___1~3#1 := __copy_from_user_nocheck_#t~ret193#1;havoc __copy_from_user_nocheck_#t~ret193#1; [2021-11-23 02:41:11,846 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5312: SUMMARY for call __copy_from_user_nocheck_#t~ret193#1 := ldv__builtin_expect((if 0 != __copy_from_user_nocheck_~ret~1#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:41:11,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5308: assume __copy_from_user_nocheck_#t~switch191#1; [2021-11-23 02:41:11,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5308: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := true; [2021-11-23 02:41:11,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5300: assume 0 != __copy_from_user_nocheck_~tmp___0~7#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5300: assume !(0 != __copy_from_user_nocheck_~tmp___0~7#1);__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5321: assume __copy_from_user_nocheck_#t~switch191#1; [2021-11-23 02:41:11,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5321: assume !__copy_from_user_nocheck_#t~switch191#1; [2021-11-23 02:41:11,847 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5313: assume 0 != __copy_from_user_nocheck_~tmp___1~3#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5313: assume !(0 != __copy_from_user_nocheck_~tmp___1~3#1);__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5280: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5280: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 4 == __copy_from_user_nocheck_~size#1; [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5322: SUMMARY for call __copy_from_user_nocheck_#t~ret194#1 := copy_user_generic(__copy_from_user_nocheck_~dst#1.base, __copy_from_user_nocheck_~dst#1.offset, __copy_from_user_nocheck_~src#1.base, __copy_from_user_nocheck_~src#1.offset, __copy_from_user_nocheck_~size#1); srcloc: null [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5322-1: __copy_from_user_nocheck_~tmp___2~3#1 := __copy_from_user_nocheck_#t~ret194#1;havoc __copy_from_user_nocheck_#t~ret194#1;__copy_from_user_nocheck_#res#1 := (if __copy_from_user_nocheck_~tmp___2~3#1 % 18446744073709551616 % 4294967296 <= 2147483647 then __copy_from_user_nocheck_~tmp___2~3#1 % 18446744073709551616 % 4294967296 else __copy_from_user_nocheck_~tmp___2~3#1 % 18446744073709551616 % 4294967296 - 4294967296); [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5285: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5285: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 8 == __copy_from_user_nocheck_~size#1; [2021-11-23 02:41:11,848 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5290: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5290: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 10 == __copy_from_user_nocheck_~size#1; [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##1: assume __copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#res#1 := __copy_from_user_nocheck_~ret~1#1; [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##2: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 2 == __copy_from_user_nocheck_~size#1; [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5274: havoc __copy_from_user_nocheck_#t~switch191#1; [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5299: SUMMARY for call __copy_from_user_nocheck_#t~ret192#1 := ldv__builtin_expect((if 0 != __copy_from_user_nocheck_~ret~1#1 then 1 else 0), 0); srcloc: null [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5299-1: assume -9223372036854775808 <= __copy_from_user_nocheck_#t~ret192#1 && __copy_from_user_nocheck_#t~ret192#1 <= 9223372036854775807;__copy_from_user_nocheck_~tmp___0~7#1 := __copy_from_user_nocheck_#t~ret192#1;havoc __copy_from_user_nocheck_#t~ret192#1; [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5295: assume __copy_from_user_nocheck_#t~switch191#1; [2021-11-23 02:41:11,849 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L5295: assume !__copy_from_user_nocheck_#t~switch191#1;__copy_from_user_nocheck_#t~switch191#1 := __copy_from_user_nocheck_#t~switch191#1 || 16 == __copy_from_user_nocheck_~size#1; [2021-11-23 02:41:15,929 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:41:19,030 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:41:19,030 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:41:19,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:19 BoogieIcfgContainer [2021-11-23 02:41:19,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:41:19,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:41:19,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:41:19,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:41:19,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:41:00" (1/3) ... [2021-11-23 02:41:19,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f1872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:19, skipping insertion in model container [2021-11-23 02:41:19,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:05" (2/3) ... [2021-11-23 02:41:19,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f1872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:19, skipping insertion in model container [2021-11-23 02:41:19,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:19" (3/3) ... [2021-11-23 02:41:19,049 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--sg.ko-entry_point.cil.out.i [2021-11-23 02:41:19,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:41:19,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:41:19,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:41:19,146 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 [2021-11-23 02:41:19,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:41:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 1917 states, 1221 states have (on average 1.4021294021294022) internal successors, (1712), 1266 states have internal predecessors, (1712), 585 states have call successors, (585), 110 states have call predecessors, (585), 109 states have return successors, (568), 566 states have call predecessors, (568), 568 states have call successors, (568) [2021-11-23 02:41:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-11-23 02:41:19,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:19,295 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:19,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 517437694, now seen corresponding path program 1 times [2021-11-23 02:41:19,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:19,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668461499] [2021-11-23 02:41:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:19,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6946 trivial. 0 not checked. [2021-11-23 02:41:21,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:21,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668461499] [2021-11-23 02:41:21,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668461499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:21,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:21,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:21,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807605968] [2021-11-23 02:41:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:21,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:21,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:21,317 INFO L87 Difference]: Start difference. First operand has 1917 states, 1221 states have (on average 1.4021294021294022) internal successors, (1712), 1266 states have internal predecessors, (1712), 585 states have call successors, (585), 110 states have call predecessors, (585), 109 states have return successors, (568), 566 states have call predecessors, (568), 568 states have call successors, (568) Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-23 02:41:23,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:27,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:30,233 INFO L93 Difference]: Finished difference Result 5479 states and 8239 transitions. [2021-11-23 02:41:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 628 [2021-11-23 02:41:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:30,294 INFO L225 Difference]: With dead ends: 5479 [2021-11-23 02:41:30,294 INFO L226 Difference]: Without dead ends: 3631 [2021-11-23 02:41:30,308 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 [2021-11-23 02:41:30,312 INFO L933 BasicCegarLoop]: 3100 mSDtfsCounter, 2692 mSDsluCounter, 2671 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 5461 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:30,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2694 Valid, 5461 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 649 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2021-11-23 02:41:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-11-23 02:41:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3627. [2021-11-23 02:41:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 2348 states have (on average 1.3960817717206133) internal successors, (3278), 2399 states have internal predecessors, (3278), 1065 states have call successors, (1065), 214 states have call predecessors, (1065), 213 states have return successors, (1065), 1058 states have call predecessors, (1065), 1063 states have call successors, (1065) [2021-11-23 02:41:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 5408 transitions. [2021-11-23 02:41:30,657 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 5408 transitions. Word has length 628 [2021-11-23 02:41:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:30,661 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 5408 transitions. [2021-11-23 02:41:30,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-23 02:41:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 5408 transitions. [2021-11-23 02:41:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2021-11-23 02:41:30,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:30,693 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:30,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:41:30,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1507232059, now seen corresponding path program 1 times [2021-11-23 02:41:30,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:30,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864417704] [2021-11-23 02:41:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:30,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2021-11-23 02:41:31,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864417704] [2021-11-23 02:41:31,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864417704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:31,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:31,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:41:31,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572400809] [2021-11-23 02:41:31,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:31,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:41:31,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:41:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:31,501 INFO L87 Difference]: Start difference. First operand 3627 states and 5408 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:41:33,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:40,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:41,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:43,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:44,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:48,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:49,411 INFO L93 Difference]: Finished difference Result 10626 states and 15885 transitions. [2021-11-23 02:41:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:41:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 662 [2021-11-23 02:41:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:49,493 INFO L225 Difference]: With dead ends: 10626 [2021-11-23 02:41:49,494 INFO L226 Difference]: Without dead ends: 7122 [2021-11-23 02:41:49,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:49,519 INFO L933 BasicCegarLoop]: 2692 mSDtfsCounter, 3371 mSDsluCounter, 3940 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 346 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3694 SdHoareTripleChecker+Valid, 5973 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:49,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3694 Valid, 5973 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2686 Invalid, 2 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 02:41:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2021-11-23 02:41:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 7093. [2021-11-23 02:41:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 4613 states have (on average 1.402774766962931) internal successors, (6471), 4717 states have internal predecessors, (6471), 2060 states have call successors, (2060), 420 states have call predecessors, (2060), 419 states have return successors, (2094), 2045 states have call predecessors, (2094), 2058 states have call successors, (2094) [2021-11-23 02:41:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 10625 transitions. [2021-11-23 02:41:50,038 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 10625 transitions. Word has length 662 [2021-11-23 02:41:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:50,041 INFO L470 AbstractCegarLoop]: Abstraction has 7093 states and 10625 transitions. [2021-11-23 02:41:50,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:41:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 10625 transitions. [2021-11-23 02:41:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2021-11-23 02:41:50,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:50,071 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:50,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:41:50,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash 427221252, now seen corresponding path program 1 times [2021-11-23 02:41:50,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:50,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452278615] [2021-11-23 02:41:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:50,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2021-11-23 02:41:50,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:50,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452278615] [2021-11-23 02:41:50,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452278615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:50,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:50,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:41:50,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504528961] [2021-11-23 02:41:50,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:50,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:41:50,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:41:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:50,846 INFO L87 Difference]: Start difference. First operand 7093 states and 10625 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:41:52,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:41:59,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:01,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:04,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:06,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:08,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:09,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:09,500 INFO L93 Difference]: Finished difference Result 14088 states and 21092 transitions. [2021-11-23 02:42:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:42:09,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 659 [2021-11-23 02:42:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:09,561 INFO L225 Difference]: With dead ends: 14088 [2021-11-23 02:42:09,561 INFO L226 Difference]: Without dead ends: 7118 [2021-11-23 02:42:09,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:42:09,590 INFO L933 BasicCegarLoop]: 2686 mSDtfsCounter, 3369 mSDsluCounter, 3939 mSDsCounter, 0 mSdLazyCounter, 2683 mSolverCounterSat, 344 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3692 SdHoareTripleChecker+Valid, 5966 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 2683 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:09,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3692 Valid, 5966 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 2683 Invalid, 3 Unknown, 0 Unchecked, 18.2s Time] [2021-11-23 02:42:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2021-11-23 02:42:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 7089. [2021-11-23 02:42:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 4611 states have (on average 1.4025157232704402) internal successors, (6467), 4715 states have internal predecessors, (6467), 2058 states have call successors, (2058), 420 states have call predecessors, (2058), 419 states have return successors, (2090), 2043 states have call predecessors, (2090), 2056 states have call successors, (2090) [2021-11-23 02:42:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 10615 transitions. [2021-11-23 02:42:09,998 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 10615 transitions. Word has length 659 [2021-11-23 02:42:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:09,999 INFO L470 AbstractCegarLoop]: Abstraction has 7089 states and 10615 transitions. [2021-11-23 02:42:10,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:42:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 10615 transitions. [2021-11-23 02:42:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2021-11-23 02:42:10,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:10,011 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:10,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:42:10,012 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1236504435, now seen corresponding path program 1 times [2021-11-23 02:42:10,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361100389] [2021-11-23 02:42:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:10,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2021-11-23 02:42:10,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361100389] [2021-11-23 02:42:10,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361100389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:10,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:42:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388955856] [2021-11-23 02:42:10,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:10,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:42:10,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:42:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:42:10,662 INFO L87 Difference]: Start difference. First operand 7089 states and 10615 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:42:12,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:18,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:20,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:22,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:24,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:27,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:28,187 INFO L93 Difference]: Finished difference Result 14305 states and 21367 transitions. [2021-11-23 02:42:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:42:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 661 [2021-11-23 02:42:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:28,297 INFO L225 Difference]: With dead ends: 14305 [2021-11-23 02:42:28,300 INFO L226 Difference]: Without dead ends: 7339 [2021-11-23 02:42:28,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:42:28,339 INFO L933 BasicCegarLoop]: 2680 mSDtfsCounter, 1985 mSDsluCounter, 5670 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 342 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2310 SdHoareTripleChecker+Valid, 7552 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:28,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2310 Valid, 7552 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2837 Invalid, 5 Unknown, 0 Unchecked, 17.1s Time] [2021-11-23 02:42:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2021-11-23 02:42:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 7307. [2021-11-23 02:42:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7307 states, 4746 states have (on average 1.3990729034976823) internal successors, (6640), 4853 states have internal predecessors, (6640), 2112 states have call successors, (2112), 449 states have call predecessors, (2112), 448 states have return successors, (2142), 2096 states have call predecessors, (2142), 2110 states have call successors, (2142) [2021-11-23 02:42:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7307 states to 7307 states and 10894 transitions. [2021-11-23 02:42:28,898 INFO L78 Accepts]: Start accepts. Automaton has 7307 states and 10894 transitions. Word has length 661 [2021-11-23 02:42:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:28,900 INFO L470 AbstractCegarLoop]: Abstraction has 7307 states and 10894 transitions. [2021-11-23 02:42:28,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:42:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7307 states and 10894 transitions. [2021-11-23 02:42:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2021-11-23 02:42:28,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:28,918 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:28,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:42:28,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash -686244836, now seen corresponding path program 1 times [2021-11-23 02:42:28,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430803114] [2021-11-23 02:42:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:28,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6952 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2021-11-23 02:42:29,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430803114] [2021-11-23 02:42:29,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430803114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:29,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:29,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:42:29,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007662026] [2021-11-23 02:42:29,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:29,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:42:29,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:42:29,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:42:29,541 INFO L87 Difference]: Start difference. First operand 7307 states and 10894 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:42:31,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:37,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:38,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:40,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:42,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:43,323 INFO L93 Difference]: Finished difference Result 14516 states and 21630 transitions. [2021-11-23 02:42:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:42:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 660 [2021-11-23 02:42:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:43,367 INFO L225 Difference]: With dead ends: 14516 [2021-11-23 02:42:43,367 INFO L226 Difference]: Without dead ends: 7332 [2021-11-23 02:42:43,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:42:43,399 INFO L933 BasicCegarLoop]: 2696 mSDtfsCounter, 4401 mSDsluCounter, 3400 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 664 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4724 SdHoareTripleChecker+Valid, 5610 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:43,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4724 Valid, 5610 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 1834 Invalid, 1 Unknown, 0 Unchecked, 13.5s Time] [2021-11-23 02:42:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2021-11-23 02:42:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 7303. [2021-11-23 02:42:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 4744 states have (on average 1.3988195615514334) internal successors, (6636), 4851 states have internal predecessors, (6636), 2110 states have call successors, (2110), 449 states have call predecessors, (2110), 448 states have return successors, (2138), 2094 states have call predecessors, (2138), 2108 states have call successors, (2138) [2021-11-23 02:42:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 10884 transitions. [2021-11-23 02:42:43,803 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 10884 transitions. Word has length 660 [2021-11-23 02:42:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:43,805 INFO L470 AbstractCegarLoop]: Abstraction has 7303 states and 10884 transitions. [2021-11-23 02:42:43,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 02:42:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 10884 transitions. [2021-11-23 02:42:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-23 02:42:43,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:43,823 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:43,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:42:43,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -657366708, now seen corresponding path program 1 times [2021-11-23 02:42:43,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:43,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921783938] [2021-11-23 02:42:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:43,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6997 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6988 trivial. 0 not checked. [2021-11-23 02:42:44,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:44,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921783938] [2021-11-23 02:42:44,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921783938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:44,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029364024] [2021-11-23 02:42:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:44,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:44,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:44,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:44,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:42:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 7415 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:42:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6997 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6964 trivial. 0 not checked. [2021-11-23 02:42:47,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:42:47,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029364024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:47,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:42:47,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-11-23 02:42:47,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548228602] [2021-11-23 02:42:47,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:47,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:42:47,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:42:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:42:47,814 INFO L87 Difference]: Start difference. First operand 7303 states and 10884 transitions. Second operand has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (82), 5 states have call predecessors, (82), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2021-11-23 02:42:49,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:55,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:42:58,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:00,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:02,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:03,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:05,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:06,795 INFO L93 Difference]: Finished difference Result 14425 states and 21565 transitions. [2021-11-23 02:43:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:43:06,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (82), 5 states have call predecessors, (82), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) Word has length 703 [2021-11-23 02:43:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:06,838 INFO L225 Difference]: With dead ends: 14425 [2021-11-23 02:43:06,839 INFO L226 Difference]: Without dead ends: 7245 [2021-11-23 02:43:06,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:43:06,869 INFO L933 BasicCegarLoop]: 2488 mSDtfsCounter, 30 mSDsluCounter, 13951 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14881 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:06,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 14881 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1935 Invalid, 4 Unknown, 0 Unchecked, 18.7s Time] [2021-11-23 02:43:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7245 states. [2021-11-23 02:43:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7245 to 7245. [2021-11-23 02:43:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7245 states, 4714 states have (on average 1.3981756470089097) internal successors, (6591), 4811 states have internal predecessors, (6591), 2086 states have call successors, (2086), 445 states have call predecessors, (2086), 444 states have return successors, (2108), 2074 states have call predecessors, (2108), 2084 states have call successors, (2108) [2021-11-23 02:43:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7245 states to 7245 states and 10785 transitions. [2021-11-23 02:43:07,334 INFO L78 Accepts]: Start accepts. Automaton has 7245 states and 10785 transitions. Word has length 703 [2021-11-23 02:43:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:07,335 INFO L470 AbstractCegarLoop]: Abstraction has 7245 states and 10785 transitions. [2021-11-23 02:43:07,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (82), 5 states have call predecessors, (82), 2 states have return successors, (75), 3 states have call predecessors, (75), 3 states have call successors, (75) [2021-11-23 02:43:07,336 INFO L276 IsEmpty]: Start isEmpty. Operand 7245 states and 10785 transitions. [2021-11-23 02:43:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2021-11-23 02:43:07,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:07,361 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:07,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:07,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:43:07,576 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash -959663403, now seen corresponding path program 1 times [2021-11-23 02:43:07,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:07,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957887414] [2021-11-23 02:43:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:07,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6993 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6989 trivial. 0 not checked. [2021-11-23 02:43:08,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957887414] [2021-11-23 02:43:08,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957887414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:08,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:08,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:43:08,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98628511] [2021-11-23 02:43:08,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:08,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:43:08,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:43:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:43:08,178 INFO L87 Difference]: Start difference. First operand 7245 states and 10785 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-23 02:43:10,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:13,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:15,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:16,234 INFO L93 Difference]: Finished difference Result 17525 states and 25928 transitions. [2021-11-23 02:43:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:43:16,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 784 [2021-11-23 02:43:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:16,285 INFO L225 Difference]: With dead ends: 17525 [2021-11-23 02:43:16,286 INFO L226 Difference]: Without dead ends: 10403 [2021-11-23 02:43:16,310 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 [2021-11-23 02:43:16,311 INFO L933 BasicCegarLoop]: 2720 mSDtfsCounter, 1169 mSDsluCounter, 2772 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 5184 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:16,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1169 Valid, 5184 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 670 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 02:43:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2021-11-23 02:43:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 10395. [2021-11-23 02:43:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10395 states, 6828 states have (on average 1.403046280023433) internal successors, (9580), 6969 states have internal predecessors, (9580), 2848 states have call successors, (2848), 719 states have call predecessors, (2848), 718 states have return successors, (2886), 2832 states have call predecessors, (2886), 2846 states have call successors, (2886) [2021-11-23 02:43:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10395 states to 10395 states and 15314 transitions. [2021-11-23 02:43:17,018 INFO L78 Accepts]: Start accepts. Automaton has 10395 states and 15314 transitions. Word has length 784 [2021-11-23 02:43:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:17,019 INFO L470 AbstractCegarLoop]: Abstraction has 10395 states and 15314 transitions. [2021-11-23 02:43:17,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-23 02:43:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10395 states and 15314 transitions. [2021-11-23 02:43:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2021-11-23 02:43:17,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:17,037 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:17,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:43:17,038 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash 342041884, now seen corresponding path program 1 times [2021-11-23 02:43:17,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:17,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778327298] [2021-11-23 02:43:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:17,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6993 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6989 trivial. 0 not checked. [2021-11-23 02:43:17,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:17,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778327298] [2021-11-23 02:43:17,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778327298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:17,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:17,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:43:17,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807365063] [2021-11-23 02:43:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:17,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:43:17,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:43:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:43:17,703 INFO L87 Difference]: Start difference. First operand 10395 states and 15314 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-23 02:43:19,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:23,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:25,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:26,458 INFO L93 Difference]: Finished difference Result 29829 states and 43979 transitions. [2021-11-23 02:43:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:43:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 759 [2021-11-23 02:43:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:26,558 INFO L225 Difference]: With dead ends: 29829 [2021-11-23 02:43:26,559 INFO L226 Difference]: Without dead ends: 19557 [2021-11-23 02:43:26,597 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 [2021-11-23 02:43:26,598 INFO L933 BasicCegarLoop]: 3733 mSDtfsCounter, 2425 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2427 SdHoareTripleChecker+Valid, 6227 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:26,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2427 Valid, 6227 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 780 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2021-11-23 02:43:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19557 states. [2021-11-23 02:43:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19557 to 19525. [2021-11-23 02:43:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19525 states, 12936 states have (on average 1.410482374768089) internal successors, (18246), 13203 states have internal predecessors, (18246), 5242 states have call successors, (5242), 1347 states have call predecessors, (5242), 1346 states have return successors, (5320), 5208 states have call predecessors, (5320), 5240 states have call successors, (5320) [2021-11-23 02:43:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19525 states to 19525 states and 28808 transitions. [2021-11-23 02:43:27,723 INFO L78 Accepts]: Start accepts. Automaton has 19525 states and 28808 transitions. Word has length 759 [2021-11-23 02:43:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:27,724 INFO L470 AbstractCegarLoop]: Abstraction has 19525 states and 28808 transitions. [2021-11-23 02:43:27,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-23 02:43:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 19525 states and 28808 transitions. [2021-11-23 02:43:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2021-11-23 02:43:27,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:27,738 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:27,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:43:27,739 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1012940673, now seen corresponding path program 1 times [2021-11-23 02:43:27,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:27,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516530796] [2021-11-23 02:43:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:27,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2021-11-23 02:43:28,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516530796] [2021-11-23 02:43:28,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516530796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:28,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:28,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:43:28,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914075556] [2021-11-23 02:43:28,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:28,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:28,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:28,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:28,330 INFO L87 Difference]: Start difference. First operand 19525 states and 28808 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:43:30,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:35,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:37,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:38,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:39,253 INFO L93 Difference]: Finished difference Result 38925 states and 57407 transitions. [2021-11-23 02:43:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 751 [2021-11-23 02:43:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:39,330 INFO L225 Difference]: With dead ends: 38925 [2021-11-23 02:43:39,330 INFO L226 Difference]: Without dead ends: 19523 [2021-11-23 02:43:39,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:39,378 INFO L933 BasicCegarLoop]: 2157 mSDtfsCounter, 4421 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 663 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4754 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:39,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4754 Valid, 2736 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 1536 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 02:43:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-11-23 02:43:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 19506. [2021-11-23 02:43:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19506 states, 12927 states have (on average 1.4096077976328614) internal successors, (18222), 13194 states have internal predecessors, (18222), 5228 states have call successors, (5228), 1351 states have call predecessors, (5228), 1350 states have return successors, (5298), 5194 states have call predecessors, (5298), 5226 states have call successors, (5298) [2021-11-23 02:43:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19506 states to 19506 states and 28748 transitions. [2021-11-23 02:43:40,460 INFO L78 Accepts]: Start accepts. Automaton has 19506 states and 28748 transitions. Word has length 751 [2021-11-23 02:43:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:40,461 INFO L470 AbstractCegarLoop]: Abstraction has 19506 states and 28748 transitions. [2021-11-23 02:43:40,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:43:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 19506 states and 28748 transitions. [2021-11-23 02:43:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2021-11-23 02:43:40,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:40,474 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:40,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:43:40,475 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash -816638818, now seen corresponding path program 1 times [2021-11-23 02:43:40,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:40,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769208574] [2021-11-23 02:43:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:40,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2021-11-23 02:43:41,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769208574] [2021-11-23 02:43:41,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769208574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:41,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:41,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:43:41,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767883058] [2021-11-23 02:43:41,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:41,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:41,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:41,310 INFO L87 Difference]: Start difference. First operand 19506 states and 28748 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:43:43,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:49,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:50,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:43:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:53,590 INFO L93 Difference]: Finished difference Result 39321 states and 57857 transitions. [2021-11-23 02:43:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 751 [2021-11-23 02:43:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:53,663 INFO L225 Difference]: With dead ends: 39321 [2021-11-23 02:43:53,663 INFO L226 Difference]: Without dead ends: 19951 [2021-11-23 02:43:53,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:53,708 INFO L933 BasicCegarLoop]: 2268 mSDtfsCounter, 2976 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 662 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:53,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3310 Valid, 3409 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 1632 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2021-11-23 02:43:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19951 states. [2021-11-23 02:43:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19951 to 19714. [2021-11-23 02:43:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19714 states, 13057 states have (on average 1.4073676954890098) internal successors, (18376), 13327 states have internal predecessors, (18376), 5270 states have call successors, (5270), 1385 states have call predecessors, (5270), 1386 states have return successors, (5336), 5237 states have call predecessors, (5336), 5268 states have call successors, (5336) [2021-11-23 02:43:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19714 states to 19714 states and 28982 transitions. [2021-11-23 02:43:54,808 INFO L78 Accepts]: Start accepts. Automaton has 19714 states and 28982 transitions. Word has length 751 [2021-11-23 02:43:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:54,809 INFO L470 AbstractCegarLoop]: Abstraction has 19714 states and 28982 transitions. [2021-11-23 02:43:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:43:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 19714 states and 28982 transitions. [2021-11-23 02:43:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2021-11-23 02:43:54,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:54,822 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:54,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:43:54,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:54,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1398843870, now seen corresponding path program 1 times [2021-11-23 02:43:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:54,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972712370] [2021-11-23 02:43:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:54,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2021-11-23 02:43:55,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:55,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972712370] [2021-11-23 02:43:55,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972712370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:55,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:55,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:43:55,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222205466] [2021-11-23 02:43:55,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:55,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:55,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:55,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:55,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:55,696 INFO L87 Difference]: Start difference. First operand 19714 states and 28982 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:43:57,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:01,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:03,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:06,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:08,379 INFO L93 Difference]: Finished difference Result 39725 states and 58328 transitions. [2021-11-23 02:44:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:44:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 752 [2021-11-23 02:44:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:08,530 INFO L225 Difference]: With dead ends: 39725 [2021-11-23 02:44:08,530 INFO L226 Difference]: Without dead ends: 20147 [2021-11-23 02:44:08,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:44:08,577 INFO L933 BasicCegarLoop]: 2207 mSDtfsCounter, 1985 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 334 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:08,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 3621 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 2441 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2021-11-23 02:44:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20147 states. [2021-11-23 02:44:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20147 to 19684. [2021-11-23 02:44:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19684 states, 13042 states have (on average 1.4066094157337832) internal successors, (18345), 13312 states have internal predecessors, (18345), 5254 states have call successors, (5254), 1386 states have call predecessors, (5254), 1387 states have return successors, (5312), 5221 states have call predecessors, (5312), 5252 states have call successors, (5312) [2021-11-23 02:44:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19684 states to 19684 states and 28911 transitions. [2021-11-23 02:44:09,500 INFO L78 Accepts]: Start accepts. Automaton has 19684 states and 28911 transitions. Word has length 752 [2021-11-23 02:44:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:09,500 INFO L470 AbstractCegarLoop]: Abstraction has 19684 states and 28911 transitions. [2021-11-23 02:44:09,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:44:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 19684 states and 28911 transitions. [2021-11-23 02:44:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2021-11-23 02:44:09,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:09,513 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 26, 26, 26, 26, 26, 26, 26, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:09,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:44:09,514 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:09,515 INFO L85 PathProgramCache]: Analyzing trace with hash 883987869, now seen corresponding path program 1 times [2021-11-23 02:44:09,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:09,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475951376] [2021-11-23 02:44:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:09,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7005 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7001 trivial. 0 not checked. [2021-11-23 02:44:10,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475951376] [2021-11-23 02:44:10,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475951376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:10,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:10,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:44:10,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730225970] [2021-11-23 02:44:10,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:10,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:44:10,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:44:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:44:10,235 INFO L87 Difference]: Start difference. First operand 19684 states and 28911 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:44:12,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:17,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:21,228 INFO L93 Difference]: Finished difference Result 38833 states and 57089 transitions. [2021-11-23 02:44:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:44:21,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 753 [2021-11-23 02:44:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:21,289 INFO L225 Difference]: With dead ends: 38833 [2021-11-23 02:44:21,290 INFO L226 Difference]: Without dead ends: 19285 [2021-11-23 02:44:21,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:44:21,329 INFO L933 BasicCegarLoop]: 2256 mSDtfsCounter, 1959 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 333 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 3739 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:21,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2291 Valid, 3739 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2452 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2021-11-23 02:44:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19285 states. [2021-11-23 02:44:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19285 to 19268. [2021-11-23 02:44:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19268 states, 12800 states have (on average 1.409140625) internal successors, (18037), 13062 states have internal predecessors, (18037), 5132 states have call successors, (5132), 1334 states have call predecessors, (5132), 1335 states have return successors, (5170), 5101 states have call predecessors, (5170), 5130 states have call successors, (5170) [2021-11-23 02:44:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19268 states to 19268 states and 28339 transitions. [2021-11-23 02:44:22,408 INFO L78 Accepts]: Start accepts. Automaton has 19268 states and 28339 transitions. Word has length 753 [2021-11-23 02:44:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:22,409 INFO L470 AbstractCegarLoop]: Abstraction has 19268 states and 28339 transitions. [2021-11-23 02:44:22,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 02:44:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 19268 states and 28339 transitions. [2021-11-23 02:44:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2021-11-23 02:44:22,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:22,450 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:22,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:44:22,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash 122225085, now seen corresponding path program 1 times [2021-11-23 02:44:22,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:22,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157035690] [2021-11-23 02:44:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:22,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13192 trivial. 0 not checked. [2021-11-23 02:44:23,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:23,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157035690] [2021-11-23 02:44:23,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157035690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020934525] [2021-11-23 02:44:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:23,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:23,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:23,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:23,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:44:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 9030 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:44:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2021-11-23 02:44:27,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:27,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020934525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:27,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:27,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-23 02:44:27,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49552155] [2021-11-23 02:44:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:27,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:44:27,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:44:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:44:27,463 INFO L87 Difference]: Start difference. First operand 19268 states and 28339 transitions. Second operand has 5 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-23 02:44:29,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:34,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:35,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:37,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:39,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:41,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:43,358 INFO L93 Difference]: Finished difference Result 49496 states and 74814 transitions. [2021-11-23 02:44:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:44:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) Word has length 992 [2021-11-23 02:44:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:43,522 INFO L225 Difference]: With dead ends: 49496 [2021-11-23 02:44:43,522 INFO L226 Difference]: Without dead ends: 30364 [2021-11-23 02:44:43,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:44:43,552 INFO L933 BasicCegarLoop]: 3799 mSDtfsCounter, 1065 mSDsluCounter, 11422 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 14088 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:43,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 14088 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1564 Invalid, 4 Unknown, 0 Unchecked, 14.6s Time] [2021-11-23 02:44:43,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2021-11-23 02:44:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 19032. [2021-11-23 02:44:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19032 states, 12684 states have (on average 1.411147902869757) internal successors, (17899), 12942 states have internal predecessors, (17899), 5036 states have call successors, (5036), 1310 states have call predecessors, (5036), 1311 states have return successors, (5066), 5007 states have call predecessors, (5066), 5034 states have call successors, (5066) [2021-11-23 02:44:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19032 states to 19032 states and 28001 transitions. [2021-11-23 02:44:45,050 INFO L78 Accepts]: Start accepts. Automaton has 19032 states and 28001 transitions. Word has length 992 [2021-11-23 02:44:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:45,051 INFO L470 AbstractCegarLoop]: Abstraction has 19032 states and 28001 transitions. [2021-11-23 02:44:45,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 2 states have call successors, (106), 2 states have call predecessors, (106), 3 states have return successors, (103), 3 states have call predecessors, (103), 2 states have call successors, (103) [2021-11-23 02:44:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 19032 states and 28001 transitions. [2021-11-23 02:44:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2021-11-23 02:44:45,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:45,088 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:45,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:45,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:45,302 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -968020763, now seen corresponding path program 1 times [2021-11-23 02:44:45,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125574840] [2021-11-23 02:44:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:45,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2021-11-23 02:44:46,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125574840] [2021-11-23 02:44:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125574840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:46,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:46,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:44:46,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017637322] [2021-11-23 02:44:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:46,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:44:46,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:44:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:46,128 INFO L87 Difference]: Start difference. First operand 19032 states and 28001 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-23 02:44:48,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:50,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:44:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:55,132 INFO L93 Difference]: Finished difference Result 37976 states and 55928 transitions. [2021-11-23 02:44:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:44:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1014 [2021-11-23 02:44:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:55,175 INFO L225 Difference]: With dead ends: 37976 [2021-11-23 02:44:55,176 INFO L226 Difference]: Without dead ends: 19048 [2021-11-23 02:44:55,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:55,204 INFO L933 BasicCegarLoop]: 2454 mSDtfsCounter, 2 mSDsluCounter, 2752 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4897 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:55,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4897 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 632 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2021-11-23 02:44:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19048 states. [2021-11-23 02:44:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19048 to 19032. [2021-11-23 02:44:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19032 states, 12684 states have (on average 1.4098864711447492) internal successors, (17883), 12942 states have internal predecessors, (17883), 5036 states have call successors, (5036), 1310 states have call predecessors, (5036), 1311 states have return successors, (5066), 5007 states have call predecessors, (5066), 5034 states have call successors, (5066) [2021-11-23 02:44:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19032 states to 19032 states and 27985 transitions. [2021-11-23 02:44:56,098 INFO L78 Accepts]: Start accepts. Automaton has 19032 states and 27985 transitions. Word has length 1014 [2021-11-23 02:44:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:56,099 INFO L470 AbstractCegarLoop]: Abstraction has 19032 states and 27985 transitions. [2021-11-23 02:44:56,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-23 02:44:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 19032 states and 27985 transitions. [2021-11-23 02:44:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2021-11-23 02:44:56,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:56,135 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:56,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:44:56,135 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -200907066, now seen corresponding path program 1 times [2021-11-23 02:44:56,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:56,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136864421] [2021-11-23 02:44:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:56,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2021-11-23 02:44:56,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:56,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136864421] [2021-11-23 02:44:56,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136864421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:56,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:56,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:44:56,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776862699] [2021-11-23 02:44:56,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:56,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:44:56,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:44:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:44:56,982 INFO L87 Difference]: Start difference. First operand 19032 states and 27985 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-23 02:44:59,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:03,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:06,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:07,934 INFO L93 Difference]: Finished difference Result 37976 states and 55896 transitions. [2021-11-23 02:45:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:45:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1014 [2021-11-23 02:45:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:07,976 INFO L225 Difference]: With dead ends: 37976 [2021-11-23 02:45:07,976 INFO L226 Difference]: Without dead ends: 19048 [2021-11-23 02:45:08,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:45:08,003 INFO L933 BasicCegarLoop]: 2449 mSDtfsCounter, 15 mSDsluCounter, 8248 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9770 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:08,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 9770 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1268 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2021-11-23 02:45:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19048 states. [2021-11-23 02:45:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19048 to 19032. [2021-11-23 02:45:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19032 states, 12684 states have (on average 1.4086250394197415) internal successors, (17867), 12942 states have internal predecessors, (17867), 5036 states have call successors, (5036), 1310 states have call predecessors, (5036), 1311 states have return successors, (5066), 5007 states have call predecessors, (5066), 5034 states have call successors, (5066) [2021-11-23 02:45:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19032 states to 19032 states and 27969 transitions. [2021-11-23 02:45:09,082 INFO L78 Accepts]: Start accepts. Automaton has 19032 states and 27969 transitions. Word has length 1014 [2021-11-23 02:45:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:09,083 INFO L470 AbstractCegarLoop]: Abstraction has 19032 states and 27969 transitions. [2021-11-23 02:45:09,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-23 02:45:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 19032 states and 27969 transitions. [2021-11-23 02:45:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2021-11-23 02:45:09,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:09,104 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:09,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:45:09,105 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:09,105 INFO L85 PathProgramCache]: Analyzing trace with hash 812124919, now seen corresponding path program 1 times [2021-11-23 02:45:09,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:09,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999544995] [2021-11-23 02:45:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:09,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13205 trivial. 0 not checked. [2021-11-23 02:45:10,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999544995] [2021-11-23 02:45:10,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999544995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:10,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:10,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:45:10,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573528581] [2021-11-23 02:45:10,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:10,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:45:10,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:45:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:45:10,053 INFO L87 Difference]: Start difference. First operand 19032 states and 27969 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-23 02:45:12,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:17,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:19,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:21,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:23,305 INFO L93 Difference]: Finished difference Result 37976 states and 55864 transitions. [2021-11-23 02:45:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:45:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1014 [2021-11-23 02:45:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:23,358 INFO L225 Difference]: With dead ends: 37976 [2021-11-23 02:45:23,358 INFO L226 Difference]: Without dead ends: 19048 [2021-11-23 02:45:23,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:45:23,389 INFO L933 BasicCegarLoop]: 2448 mSDtfsCounter, 13 mSDsluCounter, 8247 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9768 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:23,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 9768 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1266 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2021-11-23 02:45:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19048 states. [2021-11-23 02:45:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19048 to 19032. [2021-11-23 02:45:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19032 states, 12684 states have (on average 1.4073636076947336) internal successors, (17851), 12942 states have internal predecessors, (17851), 5036 states have call successors, (5036), 1310 states have call predecessors, (5036), 1311 states have return successors, (5066), 5007 states have call predecessors, (5066), 5034 states have call successors, (5066) [2021-11-23 02:45:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19032 states to 19032 states and 27953 transitions. [2021-11-23 02:45:24,528 INFO L78 Accepts]: Start accepts. Automaton has 19032 states and 27953 transitions. Word has length 1014 [2021-11-23 02:45:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:24,529 INFO L470 AbstractCegarLoop]: Abstraction has 19032 states and 27953 transitions. [2021-11-23 02:45:24,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 2 states have call successors, (110), 2 states have call predecessors, (110), 3 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-23 02:45:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 19032 states and 27953 transitions. [2021-11-23 02:45:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1019 [2021-11-23 02:45:24,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:24,558 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:24,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:45:24,559 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1615228308, now seen corresponding path program 1 times [2021-11-23 02:45:24,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059708246] [2021-11-23 02:45:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:24,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13192 trivial. 0 not checked. [2021-11-23 02:45:25,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059708246] [2021-11-23 02:45:25,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059708246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:25,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922076440] [2021-11-23 02:45:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:25,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:25,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:25,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:25,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:45:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 9202 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:45:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 13174 trivial. 0 not checked. [2021-11-23 02:45:29,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:45:29,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922076440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:29,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:45:29,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:45:29,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585766558] [2021-11-23 02:45:29,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:29,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:45:29,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:45:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:45:29,359 INFO L87 Difference]: Start difference. First operand 19032 states and 27953 transitions. Second operand has 7 states, 6 states have (on average 34.5) internal successors, (207), 7 states have internal predecessors, (207), 5 states have call successors, (113), 2 states have call predecessors, (113), 5 states have return successors, (110), 6 states have call predecessors, (110), 5 states have call successors, (110) [2021-11-23 02:45:31,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:38,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:40,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:42,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:44,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:46,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:48,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:49,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:51,215 INFO L93 Difference]: Finished difference Result 28952 states and 42469 transitions. [2021-11-23 02:45:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:45:51,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 34.5) internal successors, (207), 7 states have internal predecessors, (207), 5 states have call successors, (113), 2 states have call predecessors, (113), 5 states have return successors, (110), 6 states have call predecessors, (110), 5 states have call successors, (110) Word has length 1018 [2021-11-23 02:45:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:51,397 INFO L225 Difference]: With dead ends: 28952 [2021-11-23 02:45:51,397 INFO L226 Difference]: Without dead ends: 18984 [2021-11-23 02:45:51,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 1024 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:45:51,427 INFO L933 BasicCegarLoop]: 2448 mSDtfsCounter, 8 mSDsluCounter, 13748 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14650 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:51,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 14650 Invalid, 1921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 1912 Invalid, 5 Unknown, 0 Unchecked, 21.0s Time] [2021-11-23 02:45:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18984 states. [2021-11-23 02:45:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18984 to 18984. [2021-11-23 02:45:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18984 states, 12666 states have (on average 1.4076267171956418) internal successors, (17829), 12928 states have internal predecessors, (17829), 5012 states have call successors, (5012), 1296 states have call predecessors, (5012), 1305 states have return successors, (5046), 4987 states have call predecessors, (5046), 5010 states have call successors, (5046) [2021-11-23 02:45:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18984 states to 18984 states and 27887 transitions. [2021-11-23 02:45:52,794 INFO L78 Accepts]: Start accepts. Automaton has 18984 states and 27887 transitions. Word has length 1018 [2021-11-23 02:45:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:52,796 INFO L470 AbstractCegarLoop]: Abstraction has 18984 states and 27887 transitions. [2021-11-23 02:45:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 34.5) internal successors, (207), 7 states have internal predecessors, (207), 5 states have call successors, (113), 2 states have call predecessors, (113), 5 states have return successors, (110), 6 states have call predecessors, (110), 5 states have call successors, (110) [2021-11-23 02:45:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 18984 states and 27887 transitions. [2021-11-23 02:45:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 987 [2021-11-23 02:45:52,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:52,825 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:52,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:53,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:45:53,041 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2014441631, now seen corresponding path program 1 times [2021-11-23 02:45:53,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:53,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760983251] [2021-11-23 02:45:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:53,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13199 trivial. 0 not checked. [2021-11-23 02:45:53,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760983251] [2021-11-23 02:45:53,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760983251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:53,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:53,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:45:53,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728146949] [2021-11-23 02:45:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:53,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:45:53,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:45:53,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:53,783 INFO L87 Difference]: Start difference. First operand 18984 states and 27887 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2021-11-23 02:45:55,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:45:58,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:01,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:03,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:04,715 INFO L93 Difference]: Finished difference Result 46784 states and 68331 transitions. [2021-11-23 02:46:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 986 [2021-11-23 02:46:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:04,830 INFO L225 Difference]: With dead ends: 46784 [2021-11-23 02:46:04,830 INFO L226 Difference]: Without dead ends: 27776 [2021-11-23 02:46:04,883 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 [2021-11-23 02:46:04,884 INFO L933 BasicCegarLoop]: 3429 mSDtfsCounter, 1870 mSDsluCounter, 2430 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 5577 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:04,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1870 Valid, 5577 Invalid, 797 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 771 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:46:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27776 states. [2021-11-23 02:46:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27776 to 27768. [2021-11-23 02:46:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27768 states, 18634 states have (on average 1.4028657293120104) internal successors, (26141), 18986 states have internal predecessors, (26141), 7080 states have call successors, (7080), 2042 states have call predecessors, (7080), 2053 states have return successors, (7114), 7051 states have call predecessors, (7114), 7078 states have call successors, (7114) [2021-11-23 02:46:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27768 states to 27768 states and 40335 transitions. [2021-11-23 02:46:06,566 INFO L78 Accepts]: Start accepts. Automaton has 27768 states and 40335 transitions. Word has length 986 [2021-11-23 02:46:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:06,567 INFO L470 AbstractCegarLoop]: Abstraction has 27768 states and 40335 transitions. [2021-11-23 02:46:06,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2021-11-23 02:46:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 27768 states and 40335 transitions. [2021-11-23 02:46:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2021-11-23 02:46:06,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:06,602 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:06,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:46:06,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 593145398, now seen corresponding path program 1 times [2021-11-23 02:46:06,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:06,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15088259] [2021-11-23 02:46:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:06,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 13213 trivial. 0 not checked. [2021-11-23 02:46:07,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:07,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15088259] [2021-11-23 02:46:07,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15088259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:07,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:07,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:46:07,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807742232] [2021-11-23 02:46:07,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:07,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:46:07,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:46:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:46:07,399 INFO L87 Difference]: Start difference. First operand 27768 states and 40335 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2021-11-23 02:46:09,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:12,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:14,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:16,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:18,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:22,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:25,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:27,696 INFO L93 Difference]: Finished difference Result 64804 states and 94795 transitions. [2021-11-23 02:46:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:46:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 1004 [2021-11-23 02:46:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:27,830 INFO L225 Difference]: With dead ends: 64804 [2021-11-23 02:46:27,830 INFO L226 Difference]: Without dead ends: 37052 [2021-11-23 02:46:27,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:46:27,904 INFO L933 BasicCegarLoop]: 3947 mSDtfsCounter, 2625 mSDsluCounter, 3619 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 48 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2769 SdHoareTripleChecker+Valid, 7047 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:27,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2769 Valid, 7047 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2042 Invalid, 4 Unknown, 0 Unchecked, 18.6s Time] [2021-11-23 02:46:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37052 states. [2021-11-23 02:46:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37052 to 33080. [2021-11-23 02:46:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33080 states, 22378 states have (on average 1.4084815443739387) internal successors, (31519), 22798 states have internal predecessors, (31519), 8236 states have call successors, (8236), 2454 states have call predecessors, (8236), 2465 states have return successors, (8270), 8203 states have call predecessors, (8270), 8234 states have call successors, (8270) [2021-11-23 02:46:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33080 states to 33080 states and 48025 transitions. [2021-11-23 02:46:29,767 INFO L78 Accepts]: Start accepts. Automaton has 33080 states and 48025 transitions. Word has length 1004 [2021-11-23 02:46:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:29,769 INFO L470 AbstractCegarLoop]: Abstraction has 33080 states and 48025 transitions. [2021-11-23 02:46:29,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 3 states have call successors, (104), 2 states have call predecessors, (104), 1 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2021-11-23 02:46:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 33080 states and 48025 transitions. [2021-11-23 02:46:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2021-11-23 02:46:29,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:29,796 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 9, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:29,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:46:29,796 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1902934657, now seen corresponding path program 1 times [2021-11-23 02:46:29,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498616114] [2021-11-23 02:46:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:29,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13264 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13244 trivial. 0 not checked. [2021-11-23 02:46:30,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:30,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498616114] [2021-11-23 02:46:30,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498616114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:30,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:30,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:30,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026270042] [2021-11-23 02:46:30,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:30,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:30,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:30,689 INFO L87 Difference]: Start difference. First operand 33080 states and 48025 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 3 states have call successors, (119), 2 states have call predecessors, (119), 1 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) [2021-11-23 02:46:32,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:34,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:37,087 INFO L93 Difference]: Finished difference Result 65607 states and 95208 transitions. [2021-11-23 02:46:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 3 states have call successors, (119), 2 states have call predecessors, (119), 1 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) Word has length 1061 [2021-11-23 02:46:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:37,198 INFO L225 Difference]: With dead ends: 65607 [2021-11-23 02:46:37,199 INFO L226 Difference]: Without dead ends: 31555 [2021-11-23 02:46:37,271 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 [2021-11-23 02:46:37,272 INFO L933 BasicCegarLoop]: 3116 mSDtfsCounter, 2427 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2427 SdHoareTripleChecker+Valid, 3991 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:37,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2427 Valid, 3991 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 486 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 02:46:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31555 states. [2021-11-23 02:46:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31555 to 31328. [2021-11-23 02:46:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31328 states, 21252 states have (on average 1.407632222849614) internal successors, (29915), 21601 states have internal predecessors, (29915), 7741 states have call successors, (7741), 2323 states have call predecessors, (7741), 2334 states have return successors, (7775), 7727 states have call predecessors, (7775), 7739 states have call successors, (7775) [2021-11-23 02:46:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31328 states to 31328 states and 45431 transitions. [2021-11-23 02:46:39,201 INFO L78 Accepts]: Start accepts. Automaton has 31328 states and 45431 transitions. Word has length 1061 [2021-11-23 02:46:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:39,203 INFO L470 AbstractCegarLoop]: Abstraction has 31328 states and 45431 transitions. [2021-11-23 02:46:39,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 3 states have call successors, (119), 2 states have call predecessors, (119), 1 states have return successors, (118), 2 states have call predecessors, (118), 2 states have call successors, (118) [2021-11-23 02:46:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31328 states and 45431 transitions. [2021-11-23 02:46:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2021-11-23 02:46:39,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:39,235 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 9, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:39,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:46:39,235 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1889343058, now seen corresponding path program 1 times [2021-11-23 02:46:39,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32708304] [2021-11-23 02:46:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:39,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13258 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13244 trivial. 0 not checked. [2021-11-23 02:46:40,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:40,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32708304] [2021-11-23 02:46:40,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32708304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:46:40,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31939648] [2021-11-23 02:46:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:40,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:40,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:40,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:40,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:46:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 9157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:46:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13258 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 13198 trivial. 0 not checked. [2021-11-23 02:46:43,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:46:43,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31939648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:43,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:46:43,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-23 02:46:43,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555690052] [2021-11-23 02:46:43,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:43,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:46:43,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:46:43,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:46:43,611 INFO L87 Difference]: Start difference. First operand 31328 states and 45431 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (122), 2 states have call predecessors, (122), 3 states have return successors, (121), 3 states have call predecessors, (121), 2 states have call successors, (121) [2021-11-23 02:46:45,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:48,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:49,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:52,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:54,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:46:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:57,218 INFO L93 Difference]: Finished difference Result 62167 states and 90177 transitions. [2021-11-23 02:46:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:46:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (122), 2 states have call predecessors, (122), 3 states have return successors, (121), 3 states have call predecessors, (121), 2 states have call successors, (121) Word has length 1066 [2021-11-23 02:46:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:57,312 INFO L225 Difference]: With dead ends: 62167 [2021-11-23 02:46:57,312 INFO L226 Difference]: Without dead ends: 31544 [2021-11-23 02:46:57,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:46:57,375 INFO L933 BasicCegarLoop]: 2455 mSDtfsCounter, 6 mSDsluCounter, 8286 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9813 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:57,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 9813 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1254 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2021-11-23 02:46:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31544 states. [2021-11-23 02:46:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31544 to 31392. [2021-11-23 02:46:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31392 states, 21300 states have (on average 1.4067136150234743) internal successors, (29963), 21649 states have internal predecessors, (29963), 7741 states have call successors, (7741), 2323 states have call predecessors, (7741), 2350 states have return successors, (7807), 7743 states have call predecessors, (7807), 7739 states have call successors, (7807) [2021-11-23 02:46:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31392 states to 31392 states and 45511 transitions. [2021-11-23 02:46:59,036 INFO L78 Accepts]: Start accepts. Automaton has 31392 states and 45511 transitions. Word has length 1066 [2021-11-23 02:46:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:59,037 INFO L470 AbstractCegarLoop]: Abstraction has 31392 states and 45511 transitions. [2021-11-23 02:46:59,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (122), 2 states have call predecessors, (122), 3 states have return successors, (121), 3 states have call predecessors, (121), 2 states have call successors, (121) [2021-11-23 02:46:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 31392 states and 45511 transitions. [2021-11-23 02:46:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1056 [2021-11-23 02:46:59,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:59,063 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:59,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:59,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 02:46:59,264 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash 729735173, now seen corresponding path program 1 times [2021-11-23 02:46:59,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:59,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641708242] [2021-11-23 02:46:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:59,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 13206 trivial. 0 not checked. [2021-11-23 02:47:00,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641708242] [2021-11-23 02:47:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641708242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:47:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753953048] [2021-11-23 02:47:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:00,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:00,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:00,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:47:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:02,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 9343 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:47:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13237 backedges. 4696 proven. 0 refuted. 0 times theorem prover too weak. 8541 trivial. 0 not checked. [2021-11-23 02:47:03,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:47:03,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753953048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:03,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:47:03,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-23 02:47:03,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371866387] [2021-11-23 02:47:03,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:03,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:47:03,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:03,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:47:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:47:03,759 INFO L87 Difference]: Start difference. First operand 31392 states and 45511 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 2 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2021-11-23 02:47:05,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:08,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:10,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:11,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:14,820 INFO L93 Difference]: Finished difference Result 62651 states and 90832 transitions. [2021-11-23 02:47:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:47:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 2 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) Word has length 1055 [2021-11-23 02:47:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:14,913 INFO L225 Difference]: With dead ends: 62651 [2021-11-23 02:47:14,913 INFO L226 Difference]: Without dead ends: 31391 [2021-11-23 02:47:14,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:47:14,971 INFO L933 BasicCegarLoop]: 2450 mSDtfsCounter, 3 mSDsluCounter, 5513 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7346 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:14,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7346 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 935 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 02:47:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31391 states. [2021-11-23 02:47:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31391 to 31391. [2021-11-23 02:47:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31391 states, 21299 states have (on average 1.4066388093337716) internal successors, (29960), 21648 states have internal predecessors, (29960), 7741 states have call successors, (7741), 2323 states have call predecessors, (7741), 2350 states have return successors, (7807), 7743 states have call predecessors, (7807), 7739 states have call successors, (7807) [2021-11-23 02:47:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31391 states to 31391 states and 45508 transitions. [2021-11-23 02:47:16,683 INFO L78 Accepts]: Start accepts. Automaton has 31391 states and 45508 transitions. Word has length 1055 [2021-11-23 02:47:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:16,684 INFO L470 AbstractCegarLoop]: Abstraction has 31391 states and 45508 transitions. [2021-11-23 02:47:16,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 2 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 2 states have call predecessors, (113), 2 states have call successors, (113) [2021-11-23 02:47:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 31391 states and 45508 transitions. [2021-11-23 02:47:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2021-11-23 02:47:16,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:16,726 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:16,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:16,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:16,941 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1798993365, now seen corresponding path program 1 times [2021-11-23 02:47:16,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402156190] [2021-11-23 02:47:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:16,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13249 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 13227 trivial. 0 not checked. [2021-11-23 02:47:19,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:19,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402156190] [2021-11-23 02:47:19,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402156190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:47:19,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665253302] [2021-11-23 02:47:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:19,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:19,018 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:19,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:47:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 9474 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:47:29,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13249 backedges. 4904 proven. 0 refuted. 0 times theorem prover too weak. 8345 trivial. 0 not checked. [2021-11-23 02:47:30,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:47:30,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665253302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:30,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:47:30,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-11-23 02:47:30,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779082669] [2021-11-23 02:47:30,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:30,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:47:30,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:47:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:47:30,745 INFO L87 Difference]: Start difference. First operand 31391 states and 45508 transitions. Second operand has 6 states, 4 states have (on average 56.0) internal successors, (224), 6 states have internal predecessors, (224), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2021-11-23 02:47:32,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:36,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:38,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:40,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:43,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:46,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:47:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:49,088 INFO L93 Difference]: Finished difference Result 62778 states and 91455 transitions. [2021-11-23 02:47:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:47:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 56.0) internal successors, (224), 6 states have internal predecessors, (224), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 1075 [2021-11-23 02:47:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:49,173 INFO L225 Difference]: With dead ends: 62778 [2021-11-23 02:47:49,173 INFO L226 Difference]: Without dead ends: 31420 [2021-11-23 02:47:49,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:47:49,232 INFO L933 BasicCegarLoop]: 2415 mSDtfsCounter, 3 mSDsluCounter, 10812 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 37 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12000 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:49,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12000 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1784 Invalid, 5 Unknown, 0 Unchecked, 16.8s Time] [2021-11-23 02:47:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31420 states. [2021-11-23 02:47:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31420 to 31420. [2021-11-23 02:47:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31420 states, 21328 states have (on average 1.4060858964741185) internal successors, (29989), 21677 states have internal predecessors, (29989), 7741 states have call successors, (7741), 2323 states have call predecessors, (7741), 2350 states have return successors, (7807), 7743 states have call predecessors, (7807), 7739 states have call successors, (7807) [2021-11-23 02:47:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31420 states to 31420 states and 45537 transitions. [2021-11-23 02:47:51,010 INFO L78 Accepts]: Start accepts. Automaton has 31420 states and 45537 transitions. Word has length 1075 [2021-11-23 02:47:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:51,011 INFO L470 AbstractCegarLoop]: Abstraction has 31420 states and 45537 transitions. [2021-11-23 02:47:51,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 56.0) internal successors, (224), 6 states have internal predecessors, (224), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2021-11-23 02:47:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 31420 states and 45537 transitions. [2021-11-23 02:47:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1111 [2021-11-23 02:47:51,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:51,050 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 33, 33, 33, 33, 33, 33, 33, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:51,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:51,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:51,265 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash -133682575, now seen corresponding path program 1 times [2021-11-23 02:47:51,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510834085] [2021-11-23 02:47:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:51,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14866 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 14835 trivial. 0 not checked. [2021-11-23 02:47:52,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510834085] [2021-11-23 02:47:52,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510834085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:47:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267778292] [2021-11-23 02:47:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:52,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:52,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:52,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:52,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94b8b3fe-add7-4394-b390-db0c709f6c95/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:47:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 9676 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-23 02:47:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14866 backedges. 4711 proven. 16 refuted. 0 times theorem prover too weak. 10139 trivial. 0 not checked. [2021-11-23 02:47:58,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:59,283 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14299 disjunctions. This might take some time... [2021-11-23 02:48:15,062 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 14299 disjunctions.