./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 ae007674 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-dev-ae00767 [2021-12-28 04:05:41,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 04:05:41,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 04:05:41,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 04:05:41,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 04:05:41,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 04:05:41,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 04:05:41,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 04:05:41,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 04:05:41,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 04:05:41,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 04:05:41,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 04:05:41,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 04:05:41,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 04:05:41,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 04:05:41,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 04:05:41,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 04:05:41,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 04:05:41,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 04:05:41,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 04:05:41,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 04:05:41,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 04:05:41,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 04:05:41,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 04:05:41,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 04:05:41,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 04:05:41,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 04:05:41,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 04:05:41,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 04:05:41,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 04:05:41,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 04:05:41,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 04:05:41,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 04:05:41,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 04:05:41,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 04:05:41,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 04:05:41,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 04:05:41,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 04:05:41,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 04:05:41,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 04:05:41,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 04:05:41,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 04:05:41,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 04:05:41,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 04:05:41,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 04:05:41,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 04:05:41,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 04:05:41,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 04:05:41,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 04:05:41,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 04:05:41,758 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 04:05:41,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 04:05:41,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 04:05:41,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 04:05:41,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 04:05:41,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 04:05:41,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 04:05:41,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 04:05:41,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 04:05:41,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 04:05:41,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 04:05:41,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 04:05:41,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 04:05:41,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:05:41,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 04:05:41,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 04:05:41,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 04:05:41,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 04:05:41,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 04:05:41,763 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 04:05:41,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 04:05:41,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 04:05:41,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2021-12-28 04:05:42,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 04:05:42,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 04:05:42,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 04:05:42,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 04:05:42,099 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 04:05:42,100 INFO L432 ainManager$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 [2021-12-28 04:05:42,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3dbd38e/1c8a268b4c474d97ba9c534000de3408/FLAG3fa75a3b2 [2021-12-28 04:05:42,825 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 04:05:42,825 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 [2021-12-28 04:05:42,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3dbd38e/1c8a268b4c474d97ba9c534000de3408/FLAG3fa75a3b2 [2021-12-28 04:05:42,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3dbd38e/1c8a268b4c474d97ba9c534000de3408 [2021-12-28 04:05:42,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 04:05:42,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 04:05:42,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 04:05:42,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 04:05:42,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 04:05:42,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:05:42" (1/1) ... [2021-12-28 04:05:42,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e8f1342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:42, skipping insertion in model container [2021-12-28 04:05:42,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:05:42" (1/1) ... [2021-12-28 04:05:42,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 04:05:43,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 04:05:43,703 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] [2021-12-28 04:05:44,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:05:44,209 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 04:05:44,300 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] [2021-12-28 04:05:44,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:05:44,457 INFO L208 MainTranslator]: Completed translation [2021-12-28 04:05:44,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44 WrapperNode [2021-12-28 04:05:44,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 04:05:44,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 04:05:44,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 04:05:44,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 04:05:44,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,658 INFO L137 Inliner]: procedures = 203, calls = 1279, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 3493 [2021-12-28 04:05:44,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 04:05:44,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 04:05:44,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 04:05:44,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 04:05:44,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 04:05:44,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 04:05:44,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 04:05:44,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 04:05:44,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (1/1) ... [2021-12-28 04:05:44,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:05:44,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 04:05:44,892 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) [2021-12-28 04:05:44,899 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 [2021-12-28 04:05:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-28 04:05:44,928 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-28 04:05:44,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-12-28 04:05:44,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-12-28 04:05:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 04:05:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 04:05:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 04:05:44,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 04:05:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-28 04:05:44,929 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-28 04:05:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-28 04:05:44,930 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-28 04:05:44,930 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-28 04:05:44,930 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-28 04:05:44,930 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-28 04:05:44,930 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-28 04:05:44,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 04:05:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 04:05:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-28 04:05:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-28 04:05:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-28 04:05:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-28 04:05:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-28 04:05:44,932 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-28 04:05:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-28 04:05:44,932 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-28 04:05:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 04:05:44,932 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 04:05:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 04:05:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 04:05:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-28 04:05:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-28 04:05:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 04:05:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 04:05:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-28 04:05:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-28 04:05:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-28 04:05:44,934 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-28 04:05:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-28 04:05:44,935 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-28 04:05:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 04:05:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-28 04:05:44,935 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-28 04:05:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 04:05:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-28 04:05:44,936 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-28 04:05:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-28 04:05:44,936 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-28 04:05:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-28 04:05:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-28 04:05:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-28 04:05:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-28 04:05:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-28 04:05:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-28 04:05:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-28 04:05:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-28 04:05:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 04:05:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 04:05:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-28 04:05:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-28 04:05:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 04:05:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 04:05:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-28 04:05:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-28 04:05:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-28 04:05:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-28 04:05:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-28 04:05:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-28 04:05:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-28 04:05:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-28 04:05:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-28 04:05:44,942 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-28 04:05:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-28 04:05:44,942 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-28 04:05:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-28 04:05:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-28 04:05:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 04:05:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 04:05:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 04:05:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-28 04:05:44,944 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-28 04:05:44,967 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-28 04:05:44,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-28 04:05:44,967 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-28 04:05:44,968 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-28 04:05:44,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 04:05:44,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 04:05:44,968 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-28 04:05:44,969 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-28 04:05:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 04:05:44,969 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 04:05:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-28 04:05:44,969 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-28 04:05:44,969 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-28 04:05:44,970 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-28 04:05:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 04:05:44,970 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-28 04:05:44,971 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-28 04:05:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-28 04:05:44,971 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-28 04:05:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-28 04:05:44,972 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-28 04:05:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 04:05:44,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 04:05:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2021-12-28 04:05:44,973 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2021-12-28 04:05:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 04:05:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-28 04:05:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-28 04:05:44,973 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-28 04:05:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-28 04:05:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-28 04:05:44,973 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-28 04:05:44,974 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-28 04:05:44,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-28 04:05:44,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 04:05:44,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 04:05:44,975 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-28 04:05:44,975 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-28 04:05:44,976 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-28 04:05:44,977 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-28 04:05:44,978 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-28 04:05:44,978 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-28 04:05:44,978 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-28 04:05:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-28 04:05:44,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-28 04:05:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-28 04:05:44,980 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-28 04:05:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-28 04:05:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-28 04:05:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-28 04:05:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-28 04:05:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-28 04:05:44,986 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-28 04:05:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-28 04:05:44,986 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-28 04:05:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-28 04:05:44,986 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-28 04:05:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-28 04:05:44,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-28 04:05:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-28 04:05:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-28 04:05:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-28 04:05:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-28 04:05:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-28 04:05:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-28 04:05:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 04:05:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-28 04:05:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-28 04:05:44,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 04:05:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 04:05:44,988 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-28 04:05:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-28 04:05:45,633 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 04:05:45,636 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 04:05:45,808 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 04:05:59,584 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 04:05:59,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 04:05:59,603 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 04:05:59,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:05:59 BoogieIcfgContainer [2021-12-28 04:05:59,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 04:05:59,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 04:05:59,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 04:05:59,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 04:05:59,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 04:05:42" (1/3) ... [2021-12-28 04:05:59,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7e7eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:05:59, skipping insertion in model container [2021-12-28 04:05:59,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:05:44" (2/3) ... [2021-12-28 04:05:59,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7e7eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:05:59, skipping insertion in model container [2021-12-28 04:05:59,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:05:59" (3/3) ... [2021-12-28 04:05:59,612 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-12-28 04:05:59,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 04:05:59,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 04:05:59,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 04:05:59,672 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 [2021-12-28 04:05:59,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 04:05:59,727 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) [2021-12-28 04:05:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 04:05:59,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:05:59,736 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] [2021-12-28 04:05:59,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:05:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:05:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1492979739, now seen corresponding path program 1 times [2021-12-28 04:05:59,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:05:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907609384] [2021-12-28 04:05:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:05:59,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:06:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:06:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:06:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:06:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:06:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:06:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 04:06:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 04:06:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 04:06:00,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:06:00,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907609384] [2021-12-28 04:06:00,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907609384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:06:00,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:06:00,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:06:00,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882297638] [2021-12-28 04:06:00,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:06:00,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:06:00,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:06:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:06:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:06:00,601 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) [2021-12-28 04:06:02,648 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 [] [2021-12-28 04:06:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:06:09,022 INFO L93 Difference]: Finished difference Result 4347 states and 6622 transitions. [2021-12-28 04:06:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 04:06:09,024 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 [2021-12-28 04:06:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:06:09,063 INFO L225 Difference]: With dead ends: 4347 [2021-12-28 04:06:09,063 INFO L226 Difference]: Without dead ends: 3058 [2021-12-28 04:06:09,077 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 [2021-12-28 04:06:09,080 INFO L933 BasicCegarLoop]: 1900 mSDtfsCounter, 3882 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 1999 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4200 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 3820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1999 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-28 04:06:09,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4200 Valid, 3990 Invalid, 3820 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1999 Valid, 1820 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-12-28 04:06:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-12-28 04:06:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2334. [2021-12-28 04:06:09,282 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) [2021-12-28 04:06:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3379 transitions. [2021-12-28 04:06:09,301 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3379 transitions. Word has length 56 [2021-12-28 04:06:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:06:09,302 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3379 transitions. [2021-12-28 04:06:09,303 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) [2021-12-28 04:06:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3379 transitions. [2021-12-28 04:06:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 04:06:09,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:06:09,313 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] [2021-12-28 04:06:09,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 04:06:09,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:06:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:06:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash -963250297, now seen corresponding path program 1 times [2021-12-28 04:06:09,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:06:09,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149922384] [2021-12-28 04:06:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:06:09,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:06:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:06:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:06:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:06:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:06:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:06:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 04:06:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 04:06:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 04:06:09,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:06:09,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149922384] [2021-12-28 04:06:09,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149922384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:06:09,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:06:09,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:06:09,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431227007] [2021-12-28 04:06:09,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:06:09,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:06:09,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:06:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:06:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:06:09,684 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) [2021-12-28 04:06:11,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:06:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:06:20,232 INFO L93 Difference]: Finished difference Result 8380 states and 12482 transitions. [2021-12-28 04:06:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 04:06:20,233 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 [2021-12-28 04:06:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:06:20,275 INFO L225 Difference]: With dead ends: 8380 [2021-12-28 04:06:20,276 INFO L226 Difference]: Without dead ends: 6061 [2021-12-28 04:06:20,290 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 [2021-12-28 04:06:20,291 INFO L933 BasicCegarLoop]: 1961 mSDtfsCounter, 3190 mSDsluCounter, 2696 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 1145 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3505 SdHoareTripleChecker+Valid, 4657 SdHoareTripleChecker+Invalid, 3516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-12-28 04:06:20,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3505 Valid, 4657 Invalid, 3516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1145 Valid, 2370 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2021-12-28 04:06:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-12-28 04:06:20,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4613. [2021-12-28 04:06:20,535 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) [2021-12-28 04:06:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 6685 transitions. [2021-12-28 04:06:20,564 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 6685 transitions. Word has length 57 [2021-12-28 04:06:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:06:20,565 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 6685 transitions. [2021-12-28 04:06:20,565 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) [2021-12-28 04:06:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 6685 transitions. [2021-12-28 04:06:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 04:06:20,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:06:20,567 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] [2021-12-28 04:06:20,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 04:06:20,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:06:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:06:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash 538243510, now seen corresponding path program 1 times [2021-12-28 04:06:20,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:06:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329156564] [2021-12-28 04:06:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:06:20,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:06:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:06:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:06:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:06:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:06:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:06:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 04:06:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 04:06:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 04:06:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 04:06:20,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:06:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329156564] [2021-12-28 04:06:20,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329156564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:06:20,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:06:20,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 04:06:20,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754450617] [2021-12-28 04:06:20,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:06:20,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 04:06:20,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:06:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 04:06:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 04:06:20,873 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) [2021-12-28 04:06:22,906 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 [] [2021-12-28 04:06:25,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:06:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:06:30,184 INFO L93 Difference]: Finished difference Result 14993 states and 22029 transitions. [2021-12-28 04:06:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 04:06:30,185 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 [2021-12-28 04:06:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:06:30,247 INFO L225 Difference]: With dead ends: 14993 [2021-12-28 04:06:30,248 INFO L226 Difference]: Without dead ends: 10395 [2021-12-28 04:06:30,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:06:30,275 INFO L933 BasicCegarLoop]: 2054 mSDtfsCounter, 2217 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 841 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 3952 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-12-28 04:06:30,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 3952 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1564 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2021-12-28 04:06:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-12-28 04:06:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 8963. [2021-12-28 04:06:30,673 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) [2021-12-28 04:06:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 13003 transitions. [2021-12-28 04:06:30,710 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 13003 transitions. Word has length 59 [2021-12-28 04:06:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:06:30,710 INFO L470 AbstractCegarLoop]: Abstraction has 8963 states and 13003 transitions. [2021-12-28 04:06:30,711 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) [2021-12-28 04:06:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 13003 transitions. [2021-12-28 04:06:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 04:06:30,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:06:30,715 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] [2021-12-28 04:06:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 04:06:30,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:06:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:06:30,717 INFO L85 PathProgramCache]: Analyzing trace with hash 661729035, now seen corresponding path program 1 times [2021-12-28 04:06:30,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:06:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265584493] [2021-12-28 04:06:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:06:30,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:06:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:06:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:06:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:30,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:06:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:30,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:06:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:30,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:06:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:30,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 04:06:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 04:06:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 04:06:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:31,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 04:06:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 04:06:31,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:06:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265584493] [2021-12-28 04:06:31,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265584493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:06:31,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:06:31,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:06:31,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281733706] [2021-12-28 04:06:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:06:31,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:06:31,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:06:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:06:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:06:31,050 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) [2021-12-28 04:06:33,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:06:35,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:06:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:06:42,242 INFO L93 Difference]: Finished difference Result 32602 states and 48606 transitions. [2021-12-28 04:06:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 04:06:42,242 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 [2021-12-28 04:06:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:06:42,362 INFO L225 Difference]: With dead ends: 32602 [2021-12-28 04:06:42,362 INFO L226 Difference]: Without dead ends: 23651 [2021-12-28 04:06:42,401 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 [2021-12-28 04:06:42,402 INFO L933 BasicCegarLoop]: 1916 mSDtfsCounter, 3197 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 1157 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 4560 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-12-28 04:06:42,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3515 Valid, 4560 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1157 Valid, 2388 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2021-12-28 04:06:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23651 states. [2021-12-28 04:06:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23651 to 17850. [2021-12-28 04:06:43,187 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) [2021-12-28 04:06:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 25915 transitions. [2021-12-28 04:06:43,268 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 25915 transitions. Word has length 75 [2021-12-28 04:06:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:06:43,270 INFO L470 AbstractCegarLoop]: Abstraction has 17850 states and 25915 transitions. [2021-12-28 04:06:43,270 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) [2021-12-28 04:06:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 25915 transitions. [2021-12-28 04:06:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 04:06:43,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:06:43,277 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] [2021-12-28 04:06:43,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 04:06:43,278 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:06:43,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:06:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash -178671597, now seen corresponding path program 1 times [2021-12-28 04:06:43,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:06:43,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529856434] [2021-12-28 04:06:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:06:43,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:06:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:06:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:43,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 04:06:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:43,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 04:06:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:43,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 04:06:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:43,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 04:06:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:06:43,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 04:06:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat