./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:53:23,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:53:23,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:53:23,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:53:23,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:53:23,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:53:23,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:53:23,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:53:23,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:53:23,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:53:23,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:53:23,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:53:23,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:53:23,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:53:23,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:53:23,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:53:23,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:53:23,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:53:23,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:53:23,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:53:23,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:53:23,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:53:23,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:53:23,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:53:23,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:53:23,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:53:23,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:53:23,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:53:23,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:53:23,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:53:23,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:53:23,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:53:23,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:53:23,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:53:23,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:53:23,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:53:23,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:53:23,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:53:23,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:53:23,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:53:23,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:53:23,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:53:23,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:53:23,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:53:23,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:53:23,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:53:23,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:53:23,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:53:23,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:53:23,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:53:23,914 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:53:23,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:53:23,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:53:23,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:53:23,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:53:23,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:53:23,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:53:23,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:53:23,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:53:23,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:53:23,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:53:23,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:53:23,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:53:23,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:53:23,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:53:23,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:53:23,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:53:23,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:53:23,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:53:23,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:53:23,919 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:53:23,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:53:23,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:53:23,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2021-12-14 17:53:24,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:53:24,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:53:24,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:53:24,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:53:24,187 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:53:24,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-14 17:53:24,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/277e0f243/ef634c62e35f4431bf967dd10cd625b3/FLAG749f12a41 [2021-12-14 17:53:24,812 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:53:24,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-14 17:53:24,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/277e0f243/ef634c62e35f4431bf967dd10cd625b3/FLAG749f12a41 [2021-12-14 17:53:25,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/277e0f243/ef634c62e35f4431bf967dd10cd625b3 [2021-12-14 17:53:25,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:53:25,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:53:25,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:53:25,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:53:25,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:53:25,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:53:25" (1/1) ... [2021-12-14 17:53:25,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64280cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:25, skipping insertion in model container [2021-12-14 17:53:25,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:53:25" (1/1) ... [2021-12-14 17:53:25,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:53:25,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:53:25,775 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-12-14 17:53:26,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:53:26,241 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:53:26,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-12-14 17:53:26,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:53:26,466 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:53:26,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26 WrapperNode [2021-12-14 17:53:26,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:53:26,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:53:26,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:53:26,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:53:26,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,625 INFO L137 Inliner]: procedures = 203, calls = 1279, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 3493 [2021-12-14 17:53:26,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:53:26,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:53:26,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:53:26,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:53:26,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:53:26,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:53:26,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:53:26,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:53:26,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (1/1) ... [2021-12-14 17:53:26,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:53:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:53:26,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:53:26,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:53:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-14 17:53:26,877 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-14 17:53:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-12-14 17:53:26,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-12-14 17:53:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:53:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:53:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:53:26,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:53:26,878 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-14 17:53:26,878 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-14 17:53:26,878 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-14 17:53:26,878 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-14 17:53:26,878 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-14 17:53:26,878 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-14 17:53:26,878 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-14 17:53:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-14 17:53:26,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:53:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:53:26,879 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-14 17:53:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-14 17:53:26,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-14 17:53:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-14 17:53:26,879 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-14 17:53:26,879 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-14 17:53:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-14 17:53:26,880 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-14 17:53:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-14 17:53:26,880 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-14 17:53:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:53:26,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:53:26,880 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-14 17:53:26,880 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-14 17:53:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:53:26,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:53:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-14 17:53:26,881 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-14 17:53:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-14 17:53:26,881 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-14 17:53:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-14 17:53:26,882 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-14 17:53:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:53:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-14 17:53:26,882 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-14 17:53:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:53:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-14 17:53:26,883 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-14 17:53:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-14 17:53:26,883 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-14 17:53:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-14 17:53:26,883 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-14 17:53:26,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-14 17:53:26,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-14 17:53:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-14 17:53:26,884 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-14 17:53:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-14 17:53:26,884 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-14 17:53:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:53:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:53:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-14 17:53:26,886 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-14 17:53:26,886 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-14 17:53:26,886 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-14 17:53:26,886 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-14 17:53:26,886 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-14 17:53:26,886 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-14 17:53:26,886 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-14 17:53:26,886 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:53:26,886 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:53:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-14 17:53:26,887 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-14 17:53:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-14 17:53:26,887 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-14 17:53:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-14 17:53:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-14 17:53:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-14 17:53:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-14 17:53:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:53:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:53:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:53:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-14 17:53:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-14 17:53:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-14 17:53:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-14 17:53:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-14 17:53:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-14 17:53:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:53:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:53:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-14 17:53:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-14 17:53:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:53:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:53:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-14 17:53:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-14 17:53:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-14 17:53:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-14 17:53:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:53:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-14 17:53:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-14 17:53:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-14 17:53:26,892 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-14 17:53:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-14 17:53:26,892 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-14 17:53:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:53:26,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:53:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2021-12-14 17:53:26,893 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2021-12-14 17:53:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:53:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-14 17:53:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-14 17:53:26,893 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-14 17:53:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-14 17:53:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-14 17:53:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-14 17:53:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-14 17:53:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-14 17:53:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:53:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:53:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-14 17:53:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-14 17:53:26,897 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-14 17:53:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-14 17:53:26,897 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-14 17:53:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-14 17:53:26,898 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-14 17:53:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-14 17:53:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-14 17:53:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-14 17:53:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-14 17:53:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-14 17:53:26,903 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-14 17:53:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-14 17:53:26,903 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-14 17:53:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-14 17:53:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-14 17:53:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-14 17:53:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-14 17:53:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-14 17:53:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-14 17:53:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-14 17:53:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-14 17:53:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-14 17:53:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-14 17:53:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-14 17:53:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-14 17:53:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-14 17:53:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-14 17:53:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:53:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-14 17:53:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-14 17:53:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:53:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:53:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-14 17:53:26,906 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-14 17:53:27,386 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:53:27,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:53:27,608 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:53:40,357 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:53:40,373 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:53:40,373 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:53:40,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:53:40 BoogieIcfgContainer [2021-12-14 17:53:40,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:53:40,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:53:40,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:53:40,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:53:40,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:53:25" (1/3) ... [2021-12-14 17:53:40,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ec4e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:53:40, skipping insertion in model container [2021-12-14 17:53:40,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:53:26" (2/3) ... [2021-12-14 17:53:40,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ec4e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:53:40, skipping insertion in model container [2021-12-14 17:53:40,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:53:40" (3/3) ... [2021-12-14 17:53:40,382 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-14 17:53:40,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:53:40,386 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:53:40,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:53:40,458 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=PETRI_NET, 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 [2021-12-14 17:53:40,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:53:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) [2021-12-14 17:53:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 17:53:40,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:53:40,509 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:53:40,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:53:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:53:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1492979739, now seen corresponding path program 1 times [2021-12-14 17:53:40,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:53:40,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420934360] [2021-12-14 17:53:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:53:40,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:53:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:53:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:53:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:53:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:53:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:53:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:53:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:53:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:53:41,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:53:41,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420934360] [2021-12-14 17:53:41,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420934360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:53:41,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:53:41,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:53:41,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993296838] [2021-12-14 17:53:41,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:53:41,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:53:41,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:53:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:53:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:53:41,244 INFO L87 Difference]: Start difference. First operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 17:53:43,282 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 [] [2021-12-14 17:53:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:53:49,743 INFO L93 Difference]: Finished difference Result 4347 states and 6622 transitions. [2021-12-14 17:53:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:53:49,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2021-12-14 17:53:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:53:49,779 INFO L225 Difference]: With dead ends: 4347 [2021-12-14 17:53:49,779 INFO L226 Difference]: Without dead ends: 3058 [2021-12-14 17:53:49,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:53:49,792 INFO L933 BasicCegarLoop]: 1899 mSDtfsCounter, 3882 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 1998 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4201 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 3575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1998 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:53:49,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4201 Valid, 4234 Invalid, 3575 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1998 Valid, 1576 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-12-14 17:53:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-12-14 17:53:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2334. [2021-12-14 17:53:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 1608 states have (on average 1.3600746268656716) internal successors, (2187), 1669 states have internal predecessors, (2187), 602 states have call successors, (602), 125 states have call predecessors, (602), 123 states have return successors, (590), 581 states have call predecessors, (590), 590 states have call successors, (590) [2021-12-14 17:53:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3379 transitions. [2021-12-14 17:53:49,973 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3379 transitions. Word has length 56 [2021-12-14 17:53:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:53:49,974 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3379 transitions. [2021-12-14 17:53:49,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 17:53:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3379 transitions. [2021-12-14 17:53:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 17:53:49,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:53:49,979 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:53:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:53:49,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:53:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:53:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -963250297, now seen corresponding path program 1 times [2021-12-14 17:53:49,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:53:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302168954] [2021-12-14 17:53:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:53:49,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:53:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:53:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:53:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:53:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:53:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:53:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:53:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:53:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:53:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:53:50,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:53:50,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302168954] [2021-12-14 17:53:50,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302168954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:53:50,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:53:50,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:53:50,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229059584] [2021-12-14 17:53:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:53:50,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:53:50,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:53:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:53:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:53:50,328 INFO L87 Difference]: Start difference. First operand 2334 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 17:53:52,365 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 [] [2021-12-14 17:54:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:54:00,098 INFO L93 Difference]: Finished difference Result 8380 states and 12482 transitions. [2021-12-14 17:54:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:54:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-12-14 17:54:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:54:00,133 INFO L225 Difference]: With dead ends: 8380 [2021-12-14 17:54:00,134 INFO L226 Difference]: Without dead ends: 6061 [2021-12-14 17:54:00,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:54:00,147 INFO L933 BasicCegarLoop]: 1961 mSDtfsCounter, 3190 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 1144 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 4903 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:54:00,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3507 Valid, 4903 Invalid, 3272 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1144 Valid, 2127 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2021-12-14 17:54:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-12-14 17:54:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4613. [2021-12-14 17:54:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 3187 states have (on average 1.3614684656416693) internal successors, (4339), 3300 states have internal predecessors, (4339), 1182 states have call successors, (1182), 247 states have call predecessors, (1182), 243 states have return successors, (1164), 1149 states have call predecessors, (1164), 1164 states have call successors, (1164) [2021-12-14 17:54:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 6685 transitions. [2021-12-14 17:54:00,319 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 6685 transitions. Word has length 57 [2021-12-14 17:54:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:54:00,320 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 6685 transitions. [2021-12-14 17:54:00,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 17:54:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 6685 transitions. [2021-12-14 17:54:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 17:54:00,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:54:00,321 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:54:00,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:54:00,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:54:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:54:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash 538243510, now seen corresponding path program 1 times [2021-12-14 17:54:00,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:54:00,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888063984] [2021-12-14 17:54:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:54:00,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:54:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:54:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:54:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:54:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:54:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:54:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:54:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:54:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:54:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:54:00,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:54:00,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888063984] [2021-12-14 17:54:00,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888063984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:54:00,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:54:00,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:54:00,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105649884] [2021-12-14 17:54:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:54:00,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:54:00,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:54:00,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:54:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:54:00,573 INFO L87 Difference]: Start difference. First operand 4613 states and 6685 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:54:02,597 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 [] [2021-12-14 17:54:04,641 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 [] [2021-12-14 17:54:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:54:09,620 INFO L93 Difference]: Finished difference Result 14993 states and 22029 transitions. [2021-12-14 17:54:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:54:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2021-12-14 17:54:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:54:09,669 INFO L225 Difference]: With dead ends: 14993 [2021-12-14 17:54:09,669 INFO L226 Difference]: Without dead ends: 10395 [2021-12-14 17:54:09,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:54:09,686 INFO L933 BasicCegarLoop]: 2053 mSDtfsCounter, 2217 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 841 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 4205 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:54:09,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2489 Valid, 4205 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1309 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-12-14 17:54:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-12-14 17:54:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 8963. [2021-12-14 17:54:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 6186 states have (on average 1.3632395732298739) internal successors, (8433), 6394 states have internal predecessors, (8433), 2294 states have call successors, (2294), 487 states have call predecessors, (2294), 482 states have return successors, (2276), 2249 states have call predecessors, (2276), 2276 states have call successors, (2276) [2021-12-14 17:54:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 13003 transitions. [2021-12-14 17:54:09,983 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 13003 transitions. Word has length 59 [2021-12-14 17:54:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:54:09,984 INFO L470 AbstractCegarLoop]: Abstraction has 8963 states and 13003 transitions. [2021-12-14 17:54:09,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:54:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 13003 transitions. [2021-12-14 17:54:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 17:54:09,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:54:09,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:54:09,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:54:09,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:54:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:54:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 661729035, now seen corresponding path program 1 times [2021-12-14 17:54:09,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:54:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33861481] [2021-12-14 17:54:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:54:09,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:54:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:54:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:54:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:54:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:54:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:54:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:54:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:54:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:54:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:54:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:54:10,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:54:10,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33861481] [2021-12-14 17:54:10,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33861481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:54:10,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:54:10,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:54:10,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697778836] [2021-12-14 17:54:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:54:10,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:54:10,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:54:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:54:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:54:10,255 INFO L87 Difference]: Start difference. First operand 8963 states and 13003 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:54:12,278 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 [] [2021-12-14 17:54:14,347 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 [] [2021-12-14 17:54:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:54:21,000 INFO L93 Difference]: Finished difference Result 32602 states and 48606 transitions. [2021-12-14 17:54:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:54:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2021-12-14 17:54:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:54:21,122 INFO L225 Difference]: With dead ends: 32602 [2021-12-14 17:54:21,122 INFO L226 Difference]: Without dead ends: 23651 [2021-12-14 17:54:21,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:54:21,164 INFO L933 BasicCegarLoop]: 1917 mSDtfsCounter, 3197 mSDsluCounter, 2894 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 1156 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3514 SdHoareTripleChecker+Valid, 4811 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:54:21,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3514 Valid, 4811 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1156 Valid, 2141 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2021-12-14 17:54:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23651 states. [2021-12-14 17:54:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23651 to 17850. [2021-12-14 17:54:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17850 states, 12333 states have (on average 1.3637395605286629) internal successors, (16819), 12737 states have internal predecessors, (16819), 4558 states have call successors, (4558), 966 states have call predecessors, (4558), 958 states have return successors, (4538), 4482 states have call predecessors, (4538), 4538 states have call successors, (4538) [2021-12-14 17:54:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 25915 transitions. [2021-12-14 17:54:21,826 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 25915 transitions. Word has length 75 [2021-12-14 17:54:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:54:21,828 INFO L470 AbstractCegarLoop]: Abstraction has 17850 states and 25915 transitions. [2021-12-14 17:54:21,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 17:54:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 25915 transitions. [2021-12-14 17:54:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 17:54:21,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:54:21,834 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:54:21,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:54:21,834 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:54:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:54:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -178671597, now seen corresponding path program 1 times [2021-12-14 17:54:21,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:54:21,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747886936] [2021-12-14 17:54:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:54:21,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:54:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:54:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:54:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:54:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:54:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:54:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:54:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:54:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 17:54:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:54:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:54:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:54:22,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:54:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747886936] [2021-12-14 17:54:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747886936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:54:22,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:54:22,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-14 17:54:22,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434011114] [2021-12-14 17:54:22,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:54:22,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 17:54:22,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:54:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 17:54:22,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:54:22,731 INFO L87 Difference]: Start difference. First operand 17850 states and 25915 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 17:54:24,757 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 []