./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b 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-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 213c19133f8e1eb8e04c1430c89bd3923e29e833639b74dc68815899bbf3f9fa --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-04 03:13:07,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-04 03:13:07,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-04 03:13:07,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-04 03:13:07,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-04 03:13:07,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-04 03:13:07,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-04 03:13:07,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-04 03:13:07,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-04 03:13:07,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-04 03:13:07,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-04 03:13:07,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-04 03:13:07,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-04 03:13:07,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-04 03:13:07,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-04 03:13:07,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-04 03:13:07,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-04 03:13:07,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-04 03:13:07,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-04 03:13:07,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-04 03:13:07,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-04 03:13:07,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-04 03:13:07,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-04 03:13:07,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-04 03:13:07,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-04 03:13:07,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-04 03:13:07,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-04 03:13:07,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-04 03:13:07,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-04 03:13:07,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-04 03:13:07,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-04 03:13:07,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-04 03:13:07,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-04 03:13:07,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-04 03:13:07,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-04 03:13:07,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-04 03:13:07,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-04 03:13:07,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-04 03:13:07,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-04 03:13:07,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-04 03:13:07,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-04 03:13:07,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-04 03:13:07,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-04 03:13:07,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-04 03:13:07,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-04 03:13:07,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-04 03:13:07,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-04 03:13:07,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-04 03:13:07,431 INFO L138 SettingsManager]: * Use SBE=true [2021-11-04 03:13:07,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-04 03:13:07,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-04 03:13:07,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-04 03:13:07,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-04 03:13:07,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-04 03:13:07,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-04 03:13:07,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-04 03:13:07,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-04 03:13:07,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-04 03:13:07,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-04 03:13:07,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-04 03:13:07,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-04 03:13:07,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 03:13:07,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-04 03:13:07,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-04 03:13:07,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-04 03:13:07,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-04 03:13:07,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-04 03:13:07,435 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-04 03:13:07,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-04 03:13:07,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-04 03:13:07,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-04 03:13:07,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 213c19133f8e1eb8e04c1430c89bd3923e29e833639b74dc68815899bbf3f9fa [2021-11-04 03:13:07,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-04 03:13:07,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-04 03:13:07,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-04 03:13:07,632 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-04 03:13:07,633 INFO L275 PluginConnector]: CDTParser initialized [2021-11-04 03:13:07,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-04 03:13:07,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21e4dc64f/deab74efeef94a70aea2232f835eccfd/FLAGfe95b328f [2021-11-04 03:13:08,408 INFO L306 CDTParser]: Found 1 translation units. [2021-11-04 03:13:08,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-04 03:13:08,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21e4dc64f/deab74efeef94a70aea2232f835eccfd/FLAGfe95b328f [2021-11-04 03:13:08,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21e4dc64f/deab74efeef94a70aea2232f835eccfd [2021-11-04 03:13:08,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-04 03:13:08,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-04 03:13:08,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-04 03:13:08,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-04 03:13:08,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-04 03:13:08,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:13:08" (1/1) ... [2021-11-04 03:13:08,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a4723a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:08, skipping insertion in model container [2021-11-04 03:13:08,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:13:08" (1/1) ... [2021-11-04 03:13:08,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-04 03:13:08,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-04 03:13:11,595 WARN L228 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-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i[553894,553907] [2021-11-04 03:13:11,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 03:13:11,924 INFO L203 MainTranslator]: Completed pre-run [2021-11-04 03:13:12,578 WARN L228 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-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i[553894,553907] [2021-11-04 03:13:12,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 03:13:12,783 INFO L208 MainTranslator]: Completed translation [2021-11-04 03:13:12,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12 WrapperNode [2021-11-04 03:13:12,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-04 03:13:12,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-04 03:13:12,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-04 03:13:12,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-04 03:13:12,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:13,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:15,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-04 03:13:15,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-04 03:13:15,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-04 03:13:15,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-04 03:13:15,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:15,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:16,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:16,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:17,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:18,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:18,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:19,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-04 03:13:19,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-04 03:13:19,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-04 03:13:19,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-04 03:13:19,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (1/1) ... [2021-11-04 03:13:19,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 03:13:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 03:13:19,277 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) [2021-11-04 03:13:19,295 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 [2021-11-04 03:13:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_mmap [2021-11-04 03:13:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-04 03:13:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-04 03:13:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-04 03:13:19,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-04 03:13:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-04 03:13:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-04 03:13:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_subscribe_event [2021-11-04 03:13:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-04 03:13:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-04 03:13:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-04 03:13:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-04 03:13:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-04 03:13:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_start_analog_streaming [2021-11-04 03:13:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_start_analog_streaming [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_event_unsubscribe [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-04 03:13:19,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_poll [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-04 03:13:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-04 03:13:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_v4l2_open [2021-11-04 03:13:19,323 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_v4l2_open [2021-11-04 03:13:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-04 03:13:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_wake_i2c [2021-11-04 03:13:19,323 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_wake_i2c [2021-11-04 03:13:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-04 03:15:06,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-04 03:15:06,282 INFO L299 CfgBuilder]: Removed 18920 assume(true) statements. [2021-11-04 03:15:06,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:15:06 BoogieIcfgContainer [2021-11-04 03:15:06,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-04 03:15:06,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-04 03:15:06,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-04 03:15:06,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-04 03:15:06,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 03:13:08" (1/3) ... [2021-11-04 03:15:06,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2ebb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:15:06, skipping insertion in model container [2021-11-04 03:15:06,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:13:12" (2/3) ... [2021-11-04 03:15:06,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2ebb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:15:06, skipping insertion in model container [2021-11-04 03:15:06,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:15:06" (3/3) ... [2021-11-04 03:15:06,310 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-04 03:15:06,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-04 03:15:06,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1068 error locations. [2021-11-04 03:15:06,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-04 03:15:06,415 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 [2021-11-04 03:15:06,415 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1068 error locations. [2021-11-04 03:15:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 28524 states, 27438 states have (on average 1.5144689846198702) internal successors, (41554), 28507 states have internal predecessors, (41554), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-04 03:15:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-04 03:15:06,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 03:15:06,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-04 03:15:06,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr542ASSERT_VIOLATIONERROR_FUNCTION === [em28xx_v4l2_openErr0ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr1ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1065 more)] === [2021-11-04 03:15:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 03:15:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2051723242, now seen corresponding path program 1 times [2021-11-04 03:15:06,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 03:15:06,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77588211] [2021-11-04 03:15:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 03:15:06,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 03:15:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 03:15:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 03:15:08,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 03:15:08,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77588211] [2021-11-04 03:15:08,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77588211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 03:15:08,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 03:15:08,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 03:15:08,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246150871] [2021-11-04 03:15:08,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 03:15:08,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 03:15:08,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 03:15:08,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 03:15:08,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 03:15:08,210 INFO L87 Difference]: Start difference. First operand has 28524 states, 27438 states have (on average 1.5144689846198702) internal successors, (41554), 28507 states have internal predecessors, (41554), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 03:15:10,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 03:20:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 03:20:50,789 INFO L93 Difference]: Finished difference Result 56102 states and 82222 transitions. [2021-11-04 03:20:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 03:20:50,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-04 03:20:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 03:20:50,926 INFO L225 Difference]: With dead ends: 56102 [2021-11-04 03:20:50,926 INFO L226 Difference]: Without dead ends: 27564 [2021-11-04 03:20:51,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.02ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 03:20:51,005 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 32131 mSDsluCounter, 5202 mSDsCounter, 0 mSdLazyCounter, 46334 mSolverCounterSat, 1049 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 315596.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32131 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 47384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 295.04ms SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 46334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 338774.63ms IncrementalHoareTripleChecker+Time [2021-11-04 03:20:51,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32131 Valid, 36 Invalid, 47384 Unknown, 0 Unchecked, 295.04ms Time], IncrementalHoareTripleChecker [1049 Valid, 46334 Invalid, 1 Unknown, 0 Unchecked, 338774.63ms Time] [2021-11-04 03:20:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27564 states. [2021-11-04 03:20:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27564 to 27564. [2021-11-04 03:20:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27564 states, 26951 states have (on average 1.4652517531817002) internal successors, (39490), 27547 states have internal predecessors, (39490), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-04 03:20:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27564 states to 27564 states and 39514 transitions. [2021-11-04 03:20:51,867 INFO L78 Accepts]: Start accepts. Automaton has 27564 states and 39514 transitions. Word has length 6 [2021-11-04 03:20:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 03:20:51,868 INFO L470 AbstractCegarLoop]: Abstraction has 27564 states and 39514 transitions. [2021-11-04 03:20:51,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 03:20:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 27564 states and 39514 transitions. [2021-11-04 03:20:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-04 03:20:51,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 03:20:51,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-04 03:20:51,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-04 03:20:51,871 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr543ASSERT_VIOLATIONERROR_FUNCTION === [em28xx_v4l2_openErr0ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr1ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1065 more)] === [2021-11-04 03:20:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 03:20:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -821022145, now seen corresponding path program 1 times [2021-11-04 03:20:51,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 03:20:51,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808572141] [2021-11-04 03:20:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 03:20:51,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 03:20:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 03:20:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 03:20:52,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 03:20:52,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808572141] [2021-11-04 03:20:52,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808572141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 03:20:52,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 03:20:52,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 03:20:52,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990765318] [2021-11-04 03:20:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 03:20:52,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 03:20:52,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 03:20:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 03:20:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 03:20:52,867 INFO L87 Difference]: Start difference. First operand 27564 states and 39514 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 03:20:55,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 03:26:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 03:26:50,149 INFO L93 Difference]: Finished difference Result 27564 states and 39514 transitions. [2021-11-04 03:26:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 03:26:50,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-04 03:26:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 03:26:50,230 INFO L225 Difference]: With dead ends: 27564 [2021-11-04 03:26:50,231 INFO L226 Difference]: Without dead ends: 27562 [2021-11-04 03:26:50,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.04ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 03:26:50,243 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 39507 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39487 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 323574.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39507 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 39488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 204.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39487 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 354244.08ms IncrementalHoareTripleChecker+Time [2021-11-04 03:26:50,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39507 Valid, 24 Invalid, 39488 Unknown, 0 Unchecked, 204.98ms Time], IncrementalHoareTripleChecker [0 Valid, 39487 Invalid, 1 Unknown, 0 Unchecked, 354244.08ms Time] [2021-11-04 03:26:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27562 states. [2021-11-04 03:26:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27562 to 27562. [2021-11-04 03:26:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27562 states, 26950 states have (on average 1.4652319109461966) internal successors, (39488), 27545 states have internal predecessors, (39488), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-04 03:26:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27562 states to 27562 states and 39512 transitions. [2021-11-04 03:26:50,885 INFO L78 Accepts]: Start accepts. Automaton has 27562 states and 39512 transitions. Word has length 7 [2021-11-04 03:26:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 03:26:50,885 INFO L470 AbstractCegarLoop]: Abstraction has 27562 states and 39512 transitions. [2021-11-04 03:26:50,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 03:26:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 27562 states and 39512 transitions. [2021-11-04 03:26:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-04 03:26:50,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 03:26:50,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 03:26:50,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-04 03:26:50,887 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr544ASSERT_VIOLATIONERROR_FUNCTION === [em28xx_v4l2_openErr0ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr1ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1065 more)] === [2021-11-04 03:26:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 03:26:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash 318184084, now seen corresponding path program 1 times [2021-11-04 03:26:50,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 03:26:50,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707668183] [2021-11-04 03:26:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 03:26:50,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 03:26:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 03:26:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 03:26:51,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 03:26:51,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707668183] [2021-11-04 03:26:51,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707668183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 03:26:51,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 03:26:51,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 03:26:51,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720771639] [2021-11-04 03:26:51,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 03:26:51,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 03:26:51,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 03:26:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 03:26:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 03:26:51,966 INFO L87 Difference]: Start difference. First operand 27562 states and 39512 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 03:26:54,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15