./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 5f08f0f0 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-5f08f0f [2021-11-05 15:54:50,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 15:54:50,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 15:54:50,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 15:54:50,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 15:54:50,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 15:54:50,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 15:54:50,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 15:54:50,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 15:54:50,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 15:54:50,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 15:54:50,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 15:54:50,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 15:54:50,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 15:54:50,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 15:54:50,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 15:54:50,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 15:54:50,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 15:54:50,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 15:54:50,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 15:54:50,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 15:54:50,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 15:54:50,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 15:54:50,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 15:54:50,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 15:54:50,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 15:54:50,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 15:54:50,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 15:54:50,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 15:54:50,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 15:54:50,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 15:54:50,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 15:54:50,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 15:54:50,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 15:54:50,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 15:54:50,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 15:54:50,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 15:54:50,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 15:54:50,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 15:54:50,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 15:54:50,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 15:54:50,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 15:54:50,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 15:54:50,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 15:54:50,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 15:54:50,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 15:54:50,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 15:54:50,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 15:54:50,875 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 15:54:50,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 15:54:50,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 15:54:50,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 15:54:50,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 15:54:50,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 15:54:50,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 15:54:50,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 15:54:50,878 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 15:54:50,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 15:54:50,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 15:54:50,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 15:54:50,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 15:54:50,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 15:54:50,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 15:54:50,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 15:54:50,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 15:54:50,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 15:54:50,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 15:54:50,880 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 15:54:50,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 15:54:50,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 15:54:50,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 15:54:50,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 213c19133f8e1eb8e04c1430c89bd3923e29e833639b74dc68815899bbf3f9fa [2021-11-05 15:54:51,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 15:54:51,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 15:54:51,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 15:54:51,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 15:54:51,241 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 15:54:51,242 INFO L432 ainManager$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 [2021-11-05 15:54:51,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76fea5a4/da8a51eccb43491485ef3740b1e4ffeb/FLAG4d5fcf5c7 [2021-11-05 15:54:52,182 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 15:54:52,183 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 [2021-11-05 15:54:52,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76fea5a4/da8a51eccb43491485ef3740b1e4ffeb/FLAG4d5fcf5c7 [2021-11-05 15:54:52,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76fea5a4/da8a51eccb43491485ef3740b1e4ffeb [2021-11-05 15:54:52,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 15:54:52,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 15:54:52,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 15:54:52,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 15:54:52,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 15:54:52,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 03:54:52" (1/1) ... [2021-11-05 15:54:52,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1307d3f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:52, skipping insertion in model container [2021-11-05 15:54:52,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 03:54:52" (1/1) ... [2021-11-05 15:54:52,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 15:54:52,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 15:54:55,993 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] [2021-11-05 15:54:56,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 15:54:56,391 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 15:54:57,325 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] [2021-11-05 15:54:57,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 15:54:57,621 INFO L208 MainTranslator]: Completed translation [2021-11-05 15:54:57,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57 WrapperNode [2021-11-05 15:54:57,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 15:54:57,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 15:54:57,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 15:54:57,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 15:54:57,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:54:57,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:01,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 15:55:01,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 15:55:01,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 15:55:01,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 15:55:01,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:01,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:02,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:02,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:04,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:04,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:04,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:05,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 15:55:05,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 15:55:05,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 15:55:05,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 15:55:05,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (1/1) ... [2021-11-05 15:55:05,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 15:55:05,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 15:55:05,368 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) [2021-11-05 15:55:05,370 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 [2021-11-05 15:55:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_mmap [2021-11-05 15:55:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 15:55:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 15:55:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-05 15:55:05,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-05 15:55:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 15:55:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 15:55:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_subscribe_event [2021-11-05 15:55:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 15:55:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 15:55:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-05 15:55:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-05 15:55:05,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-05 15:55:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_start_analog_streaming [2021-11-05 15:55:05,420 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_start_analog_streaming [2021-11-05 15:55:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_event_unsubscribe [2021-11-05 15:55:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 15:55:05,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 15:55:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_poll [2021-11-05 15:55:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 15:55:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 15:55:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 15:55:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 15:55:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 15:55:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_v4l2_open [2021-11-05 15:55:05,421 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_v4l2_open [2021-11-05 15:55:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 15:55:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_wake_i2c [2021-11-05 15:55:05,422 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_wake_i2c [2021-11-05 15:55:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 15:57:43,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 15:57:43,896 INFO L299 CfgBuilder]: Removed 18920 assume(true) statements. [2021-11-05 15:57:43,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 03:57:43 BoogieIcfgContainer [2021-11-05 15:57:43,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 15:57:43,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 15:57:43,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 15:57:43,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 15:57:43,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 03:54:52" (1/3) ... [2021-11-05 15:57:43,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61315917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 03:57:43, skipping insertion in model container [2021-11-05 15:57:43,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 03:54:57" (2/3) ... [2021-11-05 15:57:43,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61315917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 03:57:43, skipping insertion in model container [2021-11-05 15:57:43,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 03:57:43" (3/3) ... [2021-11-05 15:57:43,931 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-05 15:57:43,935 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 15:57:43,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1068 error locations. [2021-11-05 15:57:44,055 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 15:57:44,062 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 [2021-11-05 15:57:44,063 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1068 error locations. [2021-11-05 15:57:44,400 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) [2021-11-05 15:57:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-05 15:57:44,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 15:57:44,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-05 15:57:44,405 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)] === [2021-11-05 15:57:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 15:57:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2051723242, now seen corresponding path program 1 times [2021-11-05 15:57:44,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 15:57:44,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387315488] [2021-11-05 15:57:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 15:57:44,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 15:57:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 15:57:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 15:57:46,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 15:57:46,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387315488] [2021-11-05 15:57:46,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387315488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 15:57:46,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 15:57:46,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 15:57:46,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524919055] [2021-11-05 15:57:46,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 15:57:46,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 15:57:46,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 15:57:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 15:57:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:57:46,784 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) [2021-11-05 15:57:49,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 15:57:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 15:57:53,408 INFO L93 Difference]: Finished difference Result 56102 states and 82222 transitions. [2021-11-05 15:57:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 15:57:53,411 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 [2021-11-05 15:57:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 15:57:53,565 INFO L225 Difference]: With dead ends: 56102 [2021-11-05 15:57:53,566 INFO L226 Difference]: Without dead ends: 27564 [2021-11-05 15:57:53,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.30ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:57:53,663 INFO L933 BasicCegarLoop]: 39070 mSDtfsCounter, 32131 mSDsluCounter, 5202 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 1049 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4498.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32131 SdHoareTripleChecker+Valid, 44272 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 129.50ms SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5501.16ms IncrementalHoareTripleChecker+Time [2021-11-05 15:57:53,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32131 Valid, 44272 Invalid, 3149 Unknown, 0 Unchecked, 129.50ms Time], IncrementalHoareTripleChecker [1049 Valid, 2099 Invalid, 1 Unknown, 0 Unchecked, 5501.16ms Time] [2021-11-05 15:57:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27564 states. [2021-11-05 15:57:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27564 to 27564. [2021-11-05 15:57:54,409 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) [2021-11-05 15:57:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27564 states to 27564 states and 39514 transitions. [2021-11-05 15:57:54,753 INFO L78 Accepts]: Start accepts. Automaton has 27564 states and 39514 transitions. Word has length 6 [2021-11-05 15:57:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 15:57:54,753 INFO L470 AbstractCegarLoop]: Abstraction has 27564 states and 39514 transitions. [2021-11-05 15:57:54,754 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) [2021-11-05 15:57:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 27564 states and 39514 transitions. [2021-11-05 15:57:54,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-05 15:57:54,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 15:57:54,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-05 15:57:54,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 15:57:54,757 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)] === [2021-11-05 15:57:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 15:57:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash -821022145, now seen corresponding path program 1 times [2021-11-05 15:57:54,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 15:57:54,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143848173] [2021-11-05 15:57:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 15:57:54,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 15:57:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 15:57:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 15:57:55,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 15:57:55,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143848173] [2021-11-05 15:57:55,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143848173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 15:57:55,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 15:57:55,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 15:57:55,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105317638] [2021-11-05 15:57:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 15:57:55,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 15:57:55,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 15:57:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 15:57:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:57:55,925 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) [2021-11-05 15:57:58,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 15:57:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 15:57:59,248 INFO L93 Difference]: Finished difference Result 27564 states and 39514 transitions. [2021-11-05 15:57:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 15:57:59,251 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 [2021-11-05 15:57:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 15:57:59,339 INFO L225 Difference]: With dead ends: 27564 [2021-11-05 15:57:59,340 INFO L226 Difference]: Without dead ends: 27562 [2021-11-05 15:57:59,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.95ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:57:59,360 INFO L933 BasicCegarLoop]: 39511 mSDtfsCounter, 39507 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2687.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39507 SdHoareTripleChecker+Valid, 39511 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2766.66ms IncrementalHoareTripleChecker+Time [2021-11-05 15:57:59,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39507 Valid, 39511 Invalid, 2 Unknown, 0 Unchecked, 55.22ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2766.66ms Time] [2021-11-05 15:57:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27562 states. [2021-11-05 15:58:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27562 to 27562. [2021-11-05 15:58:00,117 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) [2021-11-05 15:58:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27562 states to 27562 states and 39512 transitions. [2021-11-05 15:58:00,191 INFO L78 Accepts]: Start accepts. Automaton has 27562 states and 39512 transitions. Word has length 7 [2021-11-05 15:58:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 15:58:00,192 INFO L470 AbstractCegarLoop]: Abstraction has 27562 states and 39512 transitions. [2021-11-05 15:58:00,192 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) [2021-11-05 15:58:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 27562 states and 39512 transitions. [2021-11-05 15:58:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-05 15:58:00,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 15:58:00,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 15:58:00,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 15:58:00,194 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)] === [2021-11-05 15:58:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 15:58:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash 318184084, now seen corresponding path program 1 times [2021-11-05 15:58:00,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 15:58:00,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822201103] [2021-11-05 15:58:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 15:58:00,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 15:58:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 15:58:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 15:58:01,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 15:58:01,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822201103] [2021-11-05 15:58:01,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822201103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 15:58:01,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 15:58:01,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 15:58:01,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258924088] [2021-11-05 15:58:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 15:58:01,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 15:58:01,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 15:58:01,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 15:58:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:58:01,645 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) [2021-11-05 15:58:04,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 15:58:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 15:58:04,554 INFO L93 Difference]: Finished difference Result 27562 states and 39512 transitions. [2021-11-05 15:58:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 15:58:04,556 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 8 [2021-11-05 15:58:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 15:58:04,642 INFO L225 Difference]: With dead ends: 27562 [2021-11-05 15:58:04,643 INFO L226 Difference]: Without dead ends: 27560 [2021-11-05 15:58:04,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.05ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:58:04,667 INFO L933 BasicCegarLoop]: 39509 mSDtfsCounter, 39504 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2378.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39504 SdHoareTripleChecker+Valid, 39509 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2494.26ms IncrementalHoareTripleChecker+Time [2021-11-05 15:58:04,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39504 Valid, 39509 Invalid, 2 Unknown, 0 Unchecked, 45.61ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2494.26ms Time] [2021-11-05 15:58:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27560 states. [2021-11-05 15:58:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27560 to 27560. [2021-11-05 15:58:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27560 states, 26949 states have (on average 1.4652120672381164) internal successors, (39486), 27543 states have internal predecessors, (39486), 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) [2021-11-05 15:58:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27560 states to 27560 states and 39510 transitions. [2021-11-05 15:58:05,503 INFO L78 Accepts]: Start accepts. Automaton has 27560 states and 39510 transitions. Word has length 8 [2021-11-05 15:58:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 15:58:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 27560 states and 39510 transitions. [2021-11-05 15:58:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-11-05 15:58:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27560 states and 39510 transitions. [2021-11-05 15:58:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-05 15:58:05,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 15:58:05,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 15:58:05,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 15:58:05,505 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr545ASSERT_VIOLATIONERROR_FUNCTION === [em28xx_v4l2_openErr0ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr1ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1065 more)] === [2021-11-05 15:58:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 15:58:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1273838825, now seen corresponding path program 1 times [2021-11-05 15:58:05,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 15:58:05,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397777760] [2021-11-05 15:58:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 15:58:05,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 15:58:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 15:58:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 15:58:06,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 15:58:06,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397777760] [2021-11-05 15:58:06,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397777760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 15:58:06,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 15:58:06,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 15:58:06,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426761639] [2021-11-05 15:58:06,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 15:58:06,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 15:58:06,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 15:58:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 15:58:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:58:06,777 INFO L87 Difference]: Start difference. First operand 27560 states and 39510 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-05 15:58:09,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 15:58:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 15:58:10,680 INFO L93 Difference]: Finished difference Result 80350 states and 115345 transitions. [2021-11-05 15:58:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 15:58:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-05 15:58:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 15:58:10,819 INFO L225 Difference]: With dead ends: 80350 [2021-11-05 15:58:10,819 INFO L226 Difference]: Without dead ends: 52792 [2021-11-05 15:58:10,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.05ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 15:58:10,890 INFO L933 BasicCegarLoop]: 49165 mSDtfsCounter, 36335 mSDsluCounter, 39441 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2424.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36335 SdHoareTripleChecker+Valid, 88606 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 134.86ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2531.40ms IncrementalHoareTripleChecker+Time [2021-11-05 15:58:10,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36335 Valid, 88606 Invalid, 52 Unknown, 0 Unchecked, 134.86ms Time], IncrementalHoareTripleChecker [19 Valid, 32 Invalid, 1 Unknown, 0 Unchecked, 2531.40ms Time] [2021-11-05 15:58:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52792 states. [2021-11-05 15:58:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52792 to 51740. [2021-11-05 15:58:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51740 states, 51115 states have (on average 1.4720923408001565) internal successors, (75246), 51710 states have internal predecessors, (75246), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (29), 21 states have call predecessors, (29), 21 states have call successors, (29) [2021-11-05 15:58:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51740 states to 51740 states and 75296 transitions. [2021-11-05 15:58:12,317 INFO L78 Accepts]: Start accepts. Automaton has 51740 states and 75296 transitions. Word has length 9 [2021-11-05 15:58:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 15:58:12,318 INFO L470 AbstractCegarLoop]: Abstraction has 51740 states and 75296 transitions. [2021-11-05 15:58:12,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-05 15:58:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 51740 states and 75296 transitions. [2021-11-05 15:58:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-05 15:58:12,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 15:58:12,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 15:58:12,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 15:58:12,319 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr546ASSERT_VIOLATIONERROR_FUNCTION === [em28xx_v4l2_openErr0ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr1ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1065 more)] === [2021-11-05 15:58:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 15:58:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash 834364734, now seen corresponding path program 1 times [2021-11-05 15:58:12,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 15:58:12,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939623660] [2021-11-05 15:58:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 15:58:12,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms