./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.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-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.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 cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:28:48,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:28:48,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:28:48,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:28:48,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:28:48,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:28:48,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:28:48,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:28:48,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:28:48,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:28:48,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:28:48,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:28:48,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:28:48,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:28:48,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:28:48,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:28:48,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:28:48,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:28:48,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:28:48,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:28:48,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:28:48,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:28:48,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:28:48,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:28:48,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:28:48,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:28:48,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:28:48,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:28:48,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:28:48,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:28:48,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:28:48,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:28:48,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:28:48,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:28:48,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:28:48,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:28:48,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:28:48,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:28:48,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:28:48,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:28:48,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:28:48,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:28:48,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:28:48,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:28:48,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:28:48,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:28:48,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:28:48,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:28:48,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:28:48,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:28:48,955 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:28:48,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:28:48,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:28:48,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:28:48,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:28:48,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:28:48,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:28:48,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:28:48,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:28:48,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:28:48,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:28:48,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:28:48,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:28:48,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:28:48,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:28:48,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:28:48,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:28:48,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:28:48,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:28:48,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:28:48,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:28:48,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:28:48,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:28:48,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2021-12-14 17:28:49,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:28:49,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:28:49,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:28:49,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:28:49,154 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:28:49,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-14 17:28:49,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7546071cf/7f061b216e894175876ad38c0e868b92/FLAG700bbe371 [2021-12-14 17:28:49,821 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:28:49,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-14 17:28:49,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7546071cf/7f061b216e894175876ad38c0e868b92/FLAG700bbe371 [2021-12-14 17:28:50,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7546071cf/7f061b216e894175876ad38c0e868b92 [2021-12-14 17:28:50,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:28:50,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:28:50,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:28:50,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:28:50,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:28:50,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:50" (1/1) ... [2021-12-14 17:28:50,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351302ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:50, skipping insertion in model container [2021-12-14 17:28:50,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:50" (1/1) ... [2021-12-14 17:28:50,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:28:50,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:28:51,185 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-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2021-12-14 17:28:51,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:28:51,242 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:28:51,405 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-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2021-12-14 17:28:51,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:28:51,474 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:28:51,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51 WrapperNode [2021-12-14 17:28:51,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:28:51,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:28:51,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:28:51,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:28:51,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,640 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-14 17:28:51,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:28:51,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:28:51,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:28:51,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:28:51,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:28:51,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:28:51,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:28:51,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:28:51,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (1/1) ... [2021-12-14 17:28:51,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:28:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:28:51,835 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 17:28:51,854 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 17:28:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-14 17:28:51,880 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-14 17:28:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-14 17:28:51,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-14 17:28:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-14 17:28:51,880 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-14 17:28:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:28:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:28:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:28:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:28:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-14 17:28:51,881 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-14 17:28:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-14 17:28:51,881 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-14 17:28:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:28:51,882 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:28:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-14 17:28:51,882 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-14 17:28:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-14 17:28:51,882 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-14 17:28:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-14 17:28:51,882 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-14 17:28:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:28:51,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:28:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-14 17:28:51,883 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-14 17:28:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-14 17:28:51,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-14 17:28:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-14 17:28:51,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-14 17:28:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-14 17:28:51,883 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-14 17:28:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-14 17:28:51,884 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-14 17:28:51,884 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-14 17:28:51,884 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-14 17:28:51,884 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-14 17:28:51,884 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-14 17:28:51,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:28:51,884 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-14 17:28:51,885 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-14 17:28:51,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:28:51,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:28:51,885 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-14 17:28:51,885 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-14 17:28:51,885 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-14 17:28:51,885 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-14 17:28:51,885 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-14 17:28:51,885 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-14 17:28:51,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-14 17:28:51,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-14 17:28:51,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:28:51,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:28:51,886 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-14 17:28:51,887 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-14 17:28:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:28:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-14 17:28:51,888 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-14 17:28:51,888 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-14 17:28:51,888 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-14 17:28:51,888 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-14 17:28:51,889 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-14 17:28:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-14 17:28:51,889 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-14 17:28:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-14 17:28:51,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-14 17:28:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:28:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-14 17:28:51,889 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-14 17:28:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-14 17:28:51,890 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-14 17:28:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:28:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:28:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-14 17:28:51,890 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-14 17:28:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-14 17:28:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-14 17:28:51,891 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-14 17:28:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-14 17:28:51,891 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-14 17:28:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:28:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-14 17:28:51,891 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-14 17:28:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-14 17:28:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-14 17:28:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-14 17:28:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-14 17:28:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-14 17:28:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-14 17:28:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-14 17:28:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-14 17:28:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-14 17:28:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-14 17:28:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-14 17:28:51,893 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-14 17:28:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-14 17:28:51,894 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-14 17:28:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-14 17:28:51,894 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-14 17:28:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-14 17:28:51,894 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-14 17:28:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:28:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:28:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-14 17:28:51,895 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-14 17:28:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-14 17:28:51,895 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-14 17:28:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-14 17:28:51,895 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-14 17:28:51,895 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-14 17:28:51,896 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-14 17:28:51,896 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-14 17:28:51,896 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-14 17:28:51,896 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-14 17:28:51,896 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-14 17:28:51,896 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-14 17:28:51,896 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-14 17:28:51,897 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:28:51,897 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:28:51,899 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-14 17:28:51,899 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-14 17:28:51,899 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-14 17:28:51,899 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-14 17:28:51,900 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-14 17:28:51,901 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-14 17:28:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-14 17:28:51,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-14 17:28:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-14 17:28:51,905 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-14 17:28:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-14 17:28:51,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-14 17:28:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-14 17:28:51,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-14 17:28:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-14 17:28:51,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-14 17:28:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:28:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-14 17:28:51,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-14 17:28:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-14 17:28:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-14 17:28:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:28:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-14 17:28:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-14 17:28:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-14 17:28:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-14 17:28:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:28:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:28:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-14 17:28:51,907 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-14 17:28:52,329 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:28:52,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:29:05,074 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:29:05,087 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:29:05,087 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:29:05,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:29:05 BoogieIcfgContainer [2021-12-14 17:29:05,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:29:05,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:29:05,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:29:05,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:29:05,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:28:50" (1/3) ... [2021-12-14 17:29:05,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158754dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:29:05, skipping insertion in model container [2021-12-14 17:29:05,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:51" (2/3) ... [2021-12-14 17:29:05,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158754dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:29:05, skipping insertion in model container [2021-12-14 17:29:05,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:29:05" (3/3) ... [2021-12-14 17:29:05,103 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-14 17:29:05,109 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:29:05,110 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:29:05,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:29:05,163 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 17:29:05,163 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:29:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2021-12-14 17:29:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 17:29:05,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:05,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:05,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-14 17:29:05,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:05,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307594450] [2021-12-14 17:29:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:05,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:05,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:05,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307594450] [2021-12-14 17:29:05,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307594450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:05,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:05,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:29:05,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814678571] [2021-12-14 17:29:05,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:05,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:29:05,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:29:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:29:05,808 INFO L87 Difference]: Start difference. First operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:07,856 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 17:29:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:29:12,474 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-14 17:29:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:29:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-14 17:29:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:29:12,506 INFO L225 Difference]: With dead ends: 3954 [2021-12-14 17:29:12,506 INFO L226 Difference]: Without dead ends: 2729 [2021-12-14 17:29:12,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 17:29:12,523 INFO L933 BasicCegarLoop]: 2077 mSDtfsCounter, 2721 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3015 SdHoareTripleChecker+Valid, 4328 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:29:12,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3015 Valid, 4328 Invalid, 2031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 1118 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-12-14 17:29:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-14 17:29:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-14 17:29:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1510 states have (on average 1.3543046357615893) internal successors, (2045), 1568 states have internal predecessors, (2045), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2021-12-14 17:29:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-14 17:29:12,714 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-14 17:29:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:29:12,715 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-14 17:29:12,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-14 17:29:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 17:29:12,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:12,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:12,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:29:12,717 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-14 17:29:12,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:12,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240875481] [2021-12-14 17:29:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:12,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:12,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:12,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:12,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:12,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240875481] [2021-12-14 17:29:12,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240875481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:12,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:12,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:29:12,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585272378] [2021-12-14 17:29:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:12,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:29:12,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:29:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:29:12,922 INFO L87 Difference]: Start difference. First operand 2224 states and 3222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:14,947 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 17:29:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:29:20,038 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-14 17:29:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:29:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-14 17:29:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:29:20,061 INFO L225 Difference]: With dead ends: 6504 [2021-12-14 17:29:20,061 INFO L226 Difference]: Without dead ends: 5418 [2021-12-14 17:29:20,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:29:20,068 INFO L933 BasicCegarLoop]: 2799 mSDtfsCounter, 2384 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 5383 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:29:20,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2677 Valid, 5383 Invalid, 1929 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [791 Valid, 1137 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-12-14 17:29:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-14 17:29:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-14 17:29:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 2997 states have (on average 1.3546880213546881) internal successors, (4060), 3107 states have internal predecessors, (4060), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2021-12-14 17:29:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-14 17:29:20,222 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-14 17:29:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:29:20,222 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-14 17:29:20,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-14 17:29:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 17:29:20,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:20,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:20,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:29:20,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-14 17:29:20,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:20,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779614551] [2021-12-14 17:29:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:20,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:29:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:29:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:20,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:20,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779614551] [2021-12-14 17:29:20,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779614551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:20,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:20,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:29:20,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757559759] [2021-12-14 17:29:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:20,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:29:20,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:29:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:29:20,442 INFO L87 Difference]: Start difference. First operand 4408 states and 6390 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:29:22,465 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 17:29:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:29:27,465 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-14 17:29:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:29:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-12-14 17:29:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:29:27,521 INFO L225 Difference]: With dead ends: 11851 [2021-12-14 17:29:27,521 INFO L226 Difference]: Without dead ends: 10750 [2021-12-14 17:29:27,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:29:27,535 INFO L933 BasicCegarLoop]: 2261 mSDtfsCounter, 2626 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2917 SdHoareTripleChecker+Valid, 4417 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:29:27,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2917 Valid, 4417 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-12-14 17:29:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-14 17:29:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-14 17:29:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 5224 states have (on average 1.354709035222052) internal successors, (7077), 5414 states have internal predecessors, (7077), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2021-12-14 17:29:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-14 17:29:27,863 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-14 17:29:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:29:27,863 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-14 17:29:27,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:29:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-14 17:29:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 17:29:27,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:27,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:27,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:29:27,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:27,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-14 17:29:27,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:27,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691749176] [2021-12-14 17:29:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:27,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:28,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:28,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:28,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:29:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:28,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:29:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:28,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691749176] [2021-12-14 17:29:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691749176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:28,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:28,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 17:29:28,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676883226] [2021-12-14 17:29:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:28,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:29:28,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:29:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:29:28,774 INFO L87 Difference]: Start difference. First operand 7676 states and 11129 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 17:29:30,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []