./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 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-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-dev-ae00767 [2021-12-28 03:41:09,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:41:09,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:41:09,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:41:09,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:41:09,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:41:09,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:41:09,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:41:09,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:41:09,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:41:09,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:41:09,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:41:09,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:41:09,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:41:09,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:41:09,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:41:09,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:41:09,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:41:09,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:41:09,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:41:09,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:41:09,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:41:09,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:41:09,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:41:09,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:41:09,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:41:09,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:41:09,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:41:09,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:41:09,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:41:09,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:41:09,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:41:09,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:41:09,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:41:09,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:41:09,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:41:09,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:41:09,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:41:09,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:41:09,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:41:09,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:41:09,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:41:09,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:41:09,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:41:09,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:41:09,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:41:09,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:41:09,323 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:41:09,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:41:09,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:41:09,324 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:41:09,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:41:09,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:41:09,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:41:09,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:41:09,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:41:09,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:41:09,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:41:09,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:41:09,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:41:09,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:41:09,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:41:09,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:41:09,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:41:09,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:41:09,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:41:09,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:41:09,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:41:09,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:41:09,328 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:41:09,328 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:41:09,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:41:09,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2021-12-28 03:41:09,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:41:09,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:41:09,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:41:09,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:41:09,648 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:41:09,650 INFO L432 ainManager$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 [2021-12-28 03:41:09,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae9f35b5/ba9c513d28fd4f64bafe63ca921f7071/FLAG89b8b5c81 [2021-12-28 03:41:10,401 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:41:10,401 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 [2021-12-28 03:41:10,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae9f35b5/ba9c513d28fd4f64bafe63ca921f7071/FLAG89b8b5c81 [2021-12-28 03:41:10,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae9f35b5/ba9c513d28fd4f64bafe63ca921f7071 [2021-12-28 03:41:10,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:41:10,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:41:10,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:41:10,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:41:10,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:41:10,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:41:10" (1/1) ... [2021-12-28 03:41:10,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be2860e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:10, skipping insertion in model container [2021-12-28 03:41:10,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:41:10" (1/1) ... [2021-12-28 03:41:10,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:41:10,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:41:11,843 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] [2021-12-28 03:41:11,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:41:11,912 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:41:12,122 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] [2021-12-28 03:41:12,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:41:12,211 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:41:12,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12 WrapperNode [2021-12-28 03:41:12,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:41:12,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:41:12,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:41:12,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:41:12,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,441 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-28 03:41:12,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:41:12,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:41:12,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:41:12,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:41:12,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:41:12,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:41:12,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:41:12,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:41:12,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (1/1) ... [2021-12-28 03:41:12,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:41:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:41:12,728 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 03:41:12,742 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 03:41:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-28 03:41:12,770 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-28 03:41:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-28 03:41:12,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-28 03:41:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-28 03:41:12,770 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-28 03:41:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:41:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 03:41:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 03:41:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:41:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-28 03:41:12,771 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-28 03:41:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-28 03:41:12,772 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-28 03:41:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 03:41:12,772 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 03:41:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-28 03:41:12,772 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-28 03:41:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-28 03:41:12,772 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-28 03:41:12,773 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-28 03:41:12,773 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-28 03:41:12,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:41:12,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:41:12,773 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-28 03:41:12,773 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-28 03:41:12,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-28 03:41:12,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-28 03:41:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-28 03:41:12,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-28 03:41:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-28 03:41:12,774 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-28 03:41:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-28 03:41:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-28 03:41:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-28 03:41:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-28 03:41:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-28 03:41:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-28 03:41:12,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:41:12,776 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 03:41:12,776 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 03:41:12,776 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:41:12,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:41:12,776 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-28 03:41:12,777 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-28 03:41:12,777 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-28 03:41:12,777 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-28 03:41:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-28 03:41:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-28 03:41:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-28 03:41:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-28 03:41:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:41:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:41:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-28 03:41:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-28 03:41:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:41:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-28 03:41:12,780 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-28 03:41:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-28 03:41:12,781 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-28 03:41:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-28 03:41:12,782 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-28 03:41:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-28 03:41:12,782 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-28 03:41:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-28 03:41:12,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-28 03:41:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:41:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-28 03:41:12,783 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-28 03:41:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-28 03:41:12,783 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-28 03:41:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:41:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:41:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-28 03:41:12,784 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-28 03:41:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-28 03:41:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-28 03:41:12,785 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-28 03:41:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-28 03:41:12,785 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-28 03:41:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:41:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-28 03:41:12,786 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-28 03:41:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-28 03:41:12,786 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-28 03:41:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-28 03:41:12,786 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-28 03:41:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-28 03:41:12,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-28 03:41:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-28 03:41:12,787 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-28 03:41:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-28 03:41:12,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-28 03:41:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-28 03:41:12,788 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-28 03:41:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-28 03:41:12,789 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-28 03:41:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-28 03:41:12,789 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-28 03:41:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-28 03:41:12,790 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-28 03:41:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:41:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:41:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-28 03:41:12,791 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-28 03:41:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 03:41:12,791 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 03:41:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-28 03:41:12,791 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-28 03:41:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-28 03:41:12,791 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-28 03:41:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-28 03:41:12,792 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-28 03:41:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-28 03:41:12,792 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-28 03:41:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-28 03:41:12,793 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-28 03:41:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-28 03:41:12,793 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-28 03:41:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-28 03:41:12,796 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-28 03:41:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-28 03:41:12,796 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-28 03:41:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-28 03:41:12,798 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-28 03:41:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-28 03:41:12,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-28 03:41:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-28 03:41:12,799 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-28 03:41:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-28 03:41:12,803 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-28 03:41:12,803 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-28 03:41:12,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-28 03:41:12,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-28 03:41:12,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-28 03:41:12,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:41:12,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-28 03:41:12,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-28 03:41:12,804 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-28 03:41:12,804 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-28 03:41:12,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 03:41:12,804 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-28 03:41:12,805 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-28 03:41:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-28 03:41:12,805 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-28 03:41:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:41:12,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:41:12,805 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-28 03:41:12,805 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-28 03:41:13,409 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:41:13,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:41:27,757 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:41:27,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:41:27,800 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 03:41:27,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:41:27 BoogieIcfgContainer [2021-12-28 03:41:27,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:41:27,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:41:27,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:41:27,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:41:27,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:41:10" (1/3) ... [2021-12-28 03:41:27,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42617543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:41:27, skipping insertion in model container [2021-12-28 03:41:27,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:41:12" (2/3) ... [2021-12-28 03:41:27,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42617543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:41:27, skipping insertion in model container [2021-12-28 03:41:27,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:41:27" (3/3) ... [2021-12-28 03:41:27,812 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-28 03:41:27,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:41:27,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:41:27,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:41:27,884 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 03:41:27,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:41:27,929 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) [2021-12-28 03:41:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 03:41:27,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:27,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:41:27,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-28 03:41:27,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:27,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489775071] [2021-12-28 03:41:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:27,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:28,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:28,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:28,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:28,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489775071] [2021-12-28 03:41:28,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489775071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:28,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:28,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:41:28,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251660941] [2021-12-28 03:41:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:28,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:41:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:41:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:41:28,654 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) [2021-12-28 03:41:30,715 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 03:41:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:41:35,332 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-28 03:41:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:41:35,335 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 [2021-12-28 03:41:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:41:35,366 INFO L225 Difference]: With dead ends: 3954 [2021-12-28 03:41:35,367 INFO L226 Difference]: Without dead ends: 2729 [2021-12-28 03:41:35,383 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 [2021-12-28 03:41:35,387 INFO L933 BasicCegarLoop]: 2076 mSDtfsCounter, 2721 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 4083 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:41:35,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3017 Valid, 4083 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 1362 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-12-28 03:41:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-28 03:41:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-28 03:41:35,589 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) [2021-12-28 03:41:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-28 03:41:35,607 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-28 03:41:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:41:35,608 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-28 03:41:35,608 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) [2021-12-28 03:41:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-28 03:41:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 03:41:35,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:35,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:41:35,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:41:35,610 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-28 03:41:35,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:35,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313294661] [2021-12-28 03:41:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:35,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:35,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:35,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:35,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:35,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313294661] [2021-12-28 03:41:35,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313294661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:35,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:35,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:41:35,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7356941] [2021-12-28 03:41:35,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:35,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:41:35,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:35,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:41:35,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:41:35,883 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) [2021-12-28 03:41:37,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:41:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:41:43,136 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-28 03:41:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:41:43,137 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 [2021-12-28 03:41:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:41:43,169 INFO L225 Difference]: With dead ends: 6504 [2021-12-28 03:41:43,169 INFO L226 Difference]: Without dead ends: 5418 [2021-12-28 03:41:43,174 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 [2021-12-28 03:41:43,180 INFO L933 BasicCegarLoop]: 2798 mSDtfsCounter, 2384 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 5127 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:41:43,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2677 Valid, 5127 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 1390 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-12-28 03:41:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-28 03:41:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-28 03:41:43,349 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) [2021-12-28 03:41:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-28 03:41:43,381 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-28 03:41:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:41:43,381 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-28 03:41:43,382 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) [2021-12-28 03:41:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-28 03:41:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 03:41:43,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:43,384 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] [2021-12-28 03:41:43,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:41:43,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-28 03:41:43,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:43,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016415262] [2021-12-28 03:41:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:43,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 03:41:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:43,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:41:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:43,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016415262] [2021-12-28 03:41:43,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016415262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:43,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:43,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:41:43,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166367250] [2021-12-28 03:41:43,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:43,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:41:43,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:43,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:41:43,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:41:43,685 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) [2021-12-28 03:41:45,719 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 03:41:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:41:50,749 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-28 03:41:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:41:50,750 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 [2021-12-28 03:41:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:41:50,814 INFO L225 Difference]: With dead ends: 11851 [2021-12-28 03:41:50,815 INFO L226 Difference]: Without dead ends: 10750 [2021-12-28 03:41:50,825 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 [2021-12-28 03:41:50,826 INFO L933 BasicCegarLoop]: 2262 mSDtfsCounter, 2626 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2916 SdHoareTripleChecker+Valid, 4167 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:41:50,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2916 Valid, 4167 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1383 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-12-28 03:41:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-28 03:41:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-28 03:41:51,173 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) [2021-12-28 03:41:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-28 03:41:51,207 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-28 03:41:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:41:51,208 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-28 03:41:51,209 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) [2021-12-28 03:41:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-28 03:41:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 03:41:51,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:41:51,215 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] [2021-12-28 03:41:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:41:51,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:41:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:41:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-28 03:41:51,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:41:51,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712837324] [2021-12-28 03:41:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:41:51,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:41:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:51,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:41:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:41:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:51,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 03:41:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:41:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:41:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:41:52,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:41:52,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712837324] [2021-12-28 03:41:52,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712837324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:41:52,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:41:52,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 03:41:52,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133179228] [2021-12-28 03:41:52,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:41:52,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 03:41:52,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:41:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 03:41:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:41:52,067 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) [2021-12-28 03:41:54,102 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 []