./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 5b36d44f 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-5b36d44 [2021-11-07 12:29:55,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 12:29:55,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 12:29:55,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 12:29:55,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 12:29:55,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 12:29:55,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 12:29:55,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 12:29:55,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 12:29:55,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 12:29:55,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 12:29:55,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 12:29:55,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 12:29:55,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 12:29:55,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 12:29:55,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 12:29:55,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 12:29:55,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 12:29:55,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 12:29:55,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 12:29:55,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 12:29:55,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 12:29:55,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 12:29:55,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 12:29:55,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 12:29:55,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 12:29:55,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 12:29:55,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 12:29:55,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 12:29:55,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 12:29:55,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 12:29:55,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 12:29:55,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 12:29:55,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 12:29:55,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 12:29:55,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 12:29:55,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 12:29:55,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 12:29:55,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 12:29:55,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 12:29:55,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 12:29:55,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 12:29:55,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 12:29:55,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 12:29:55,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 12:29:55,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 12:29:55,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 12:29:55,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 12:29:55,652 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 12:29:55,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 12:29:55,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 12:29:55,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 12:29:55,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 12:29:55,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 12:29:55,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 12:29:55,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 12:29:55,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 12:29:55,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 12:29:55,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 12:29:55,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 12:29:55,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 12:29:55,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 12:29:55,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 12:29:55,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 12:29:55,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 12:29:55,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 12:29:55,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 12:29:55,657 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 12:29:55,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 12:29:55,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 12:29:55,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 12:29:55,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 213c19133f8e1eb8e04c1430c89bd3923e29e833639b74dc68815899bbf3f9fa [2021-11-07 12:29:55,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 12:29:55,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 12:29:55,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 12:29:55,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 12:29:55,920 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 12:29:55,921 INFO L432 ainManager$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 [2021-11-07 12:29:55,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec0fe5df/b810c22379714e868a4344cec42beee8/FLAG44121933f [2021-11-07 12:29:56,873 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 12:29:56,873 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 [2021-11-07 12:29:56,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec0fe5df/b810c22379714e868a4344cec42beee8/FLAG44121933f [2021-11-07 12:29:56,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec0fe5df/b810c22379714e868a4344cec42beee8 [2021-11-07 12:29:56,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 12:29:56,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 12:29:56,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 12:29:56,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 12:29:56,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 12:29:56,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:29:56" (1/1) ... [2021-11-07 12:29:56,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b52a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:29:56, skipping insertion in model container [2021-11-07 12:29:56,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:29:56" (1/1) ... [2021-11-07 12:29:56,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 12:29:57,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 12:30:00,271 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] [2021-11-07 12:30:00,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 12:30:00,612 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 12:30:01,479 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] [2021-11-07 12:30:01,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 12:30:01,761 INFO L208 MainTranslator]: Completed translation [2021-11-07 12:30:01,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01 WrapperNode [2021-11-07 12:30:01,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 12:30:01,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 12:30:01,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 12:30:01,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 12:30:01,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:02,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:05,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 12:30:05,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 12:30:05,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 12:30:05,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 12:30:05,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:05,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:06,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:06,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:08,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:08,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:08,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:09,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 12:30:09,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 12:30:09,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 12:30:09,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 12:30:09,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (1/1) ... [2021-11-07 12:30:09,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 12:30:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:30:09,695 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) [2021-11-07 12:30:09,720 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 [2021-11-07 12:30:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_mmap [2021-11-07 12:30:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 12:30:09,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 12:30:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-07 12:30:09,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-07 12:30:09,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 12:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 12:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_subscribe_event [2021-11-07 12:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 12:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 12:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 12:30:09,744 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-07 12:30:09,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-07 12:30:09,745 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_start_analog_streaming [2021-11-07 12:30:09,745 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_start_analog_streaming [2021-11-07 12:30:09,745 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_event_unsubscribe [2021-11-07 12:30:09,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 12:30:09,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 12:30:09,745 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_poll [2021-11-07 12:30:09,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 12:30:09,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 12:30:09,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 12:30:09,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 12:30:09,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 12:30:09,747 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_v4l2_open [2021-11-07 12:30:09,747 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_v4l2_open [2021-11-07 12:30:09,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 12:30:09,747 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_wake_i2c [2021-11-07 12:30:09,747 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_wake_i2c [2021-11-07 12:30:09,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 12:32:53,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 12:32:53,507 INFO L299 CfgBuilder]: Removed 18920 assume(true) statements. [2021-11-07 12:32:53,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:32:53 BoogieIcfgContainer [2021-11-07 12:32:53,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 12:32:53,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 12:32:53,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 12:32:53,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 12:32:53,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:29:56" (1/3) ... [2021-11-07 12:32:53,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57439df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:32:53, skipping insertion in model container [2021-11-07 12:32:53,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:30:01" (2/3) ... [2021-11-07 12:32:53,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57439df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:32:53, skipping insertion in model container [2021-11-07 12:32:53,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:32:53" (3/3) ... [2021-11-07 12:32:53,539 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-07 12:32:53,543 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 12:32:53,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1068 error locations. [2021-11-07 12:32:53,663 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 12:32:53,670 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 [2021-11-07 12:32:53,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1068 error locations. [2021-11-07 12:32:54,068 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) [2021-11-07 12:32:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 12:32:54,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:32:54,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 12:32:54,073 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)] === [2021-11-07 12:32:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:32:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2051723242, now seen corresponding path program 1 times [2021-11-07 12:32:54,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:32:54,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539986083] [2021-11-07 12:32:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:32:54,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:32:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:32:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:32:56,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:32:56,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539986083] [2021-11-07 12:32:56,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539986083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:32:56,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:32:56,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:32:56,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318856366] [2021-11-07 12:32:56,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:32:56,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:32:56,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:32:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:32:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:32:56,295 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) [2021-11-07 12:32:58,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:33:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:33:02,912 INFO L93 Difference]: Finished difference Result 56102 states and 82222 transitions. [2021-11-07 12:33:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:33:02,916 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 [2021-11-07 12:33:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:33:03,065 INFO L225 Difference]: With dead ends: 56102 [2021-11-07 12:33:03,066 INFO L226 Difference]: Without dead ends: 27564 [2021-11-07 12:33:03,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.35ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:33:03,162 INFO L933 BasicCegarLoop]: 39070 mSDtfsCounter, 32131 mSDsluCounter, 5202 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 1049 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4664.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32131 SdHoareTripleChecker+Valid, 44272 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 121.47ms SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5470.00ms IncrementalHoareTripleChecker+Time [2021-11-07 12:33:03,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32131 Valid, 44272 Invalid, 3149 Unknown, 0 Unchecked, 121.47ms Time], IncrementalHoareTripleChecker [1049 Valid, 2099 Invalid, 1 Unknown, 0 Unchecked, 5470.00ms Time] [2021-11-07 12:33:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27564 states. [2021-11-07 12:33:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27564 to 27564. [2021-11-07 12:33:04,103 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) [2021-11-07 12:33:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27564 states to 27564 states and 39514 transitions. [2021-11-07 12:33:04,227 INFO L78 Accepts]: Start accepts. Automaton has 27564 states and 39514 transitions. Word has length 6 [2021-11-07 12:33:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:33:04,230 INFO L470 AbstractCegarLoop]: Abstraction has 27564 states and 39514 transitions. [2021-11-07 12:33:04,231 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) [2021-11-07 12:33:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 27564 states and 39514 transitions. [2021-11-07 12:33:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 12:33:04,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:33:04,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:33:04,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 12:33:04,234 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)] === [2021-11-07 12:33:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:33:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash -821022145, now seen corresponding path program 1 times [2021-11-07 12:33:04,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:33:04,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468158119] [2021-11-07 12:33:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:33:04,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:33:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:33:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:33:05,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:33:05,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468158119] [2021-11-07 12:33:05,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468158119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:33:05,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:33:05,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:33:05,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762582513] [2021-11-07 12:33:05,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:33:05,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:33:05,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:33:05,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:33:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:33:05,892 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) [2021-11-07 12:33:08,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:33:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:33:09,028 INFO L93 Difference]: Finished difference Result 27564 states and 39514 transitions. [2021-11-07 12:33:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:33:09,031 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 [2021-11-07 12:33:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:33:09,129 INFO L225 Difference]: With dead ends: 27564 [2021-11-07 12:33:09,129 INFO L226 Difference]: Without dead ends: 27562 [2021-11-07 12:33:09,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.99ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:33:09,153 INFO L933 BasicCegarLoop]: 39511 mSDtfsCounter, 39507 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2416.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39507 SdHoareTripleChecker+Valid, 39511 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2513.12ms IncrementalHoareTripleChecker+Time [2021-11-07 12:33:09,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39507 Valid, 39511 Invalid, 2 Unknown, 0 Unchecked, 55.02ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2513.12ms Time] [2021-11-07 12:33:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27562 states. [2021-11-07 12:33:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27562 to 27562. [2021-11-07 12:33:10,100 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) [2021-11-07 12:33:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27562 states to 27562 states and 39512 transitions. [2021-11-07 12:33:10,181 INFO L78 Accepts]: Start accepts. Automaton has 27562 states and 39512 transitions. Word has length 7 [2021-11-07 12:33:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:33:10,181 INFO L470 AbstractCegarLoop]: Abstraction has 27562 states and 39512 transitions. [2021-11-07 12:33:10,182 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) [2021-11-07 12:33:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 27562 states and 39512 transitions. [2021-11-07 12:33:10,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 12:33:10,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:33:10,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:33:10,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 12:33:10,183 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)] === [2021-11-07 12:33:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:33:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash 318184084, now seen corresponding path program 1 times [2021-11-07 12:33:10,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:33:10,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616542586] [2021-11-07 12:33:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:33:10,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:33:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:33:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:33:11,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:33:11,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616542586] [2021-11-07 12:33:11,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616542586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:33:11,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:33:11,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:33:11,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346686813] [2021-11-07 12:33:11,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:33:11,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:33:11,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:33:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:33:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:33:11,511 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) [2021-11-07 12:33:14,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:33:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:33:14,672 INFO L93 Difference]: Finished difference Result 27562 states and 39512 transitions. [2021-11-07 12:33:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:33:14,673 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 [2021-11-07 12:33:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:33:14,753 INFO L225 Difference]: With dead ends: 27562 [2021-11-07 12:33:14,754 INFO L226 Difference]: Without dead ends: 27560 [2021-11-07 12:33:14,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:33:14,773 INFO L933 BasicCegarLoop]: 39509 mSDtfsCounter, 39504 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2485.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39504 SdHoareTripleChecker+Valid, 39509 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2569.93ms IncrementalHoareTripleChecker+Time [2021-11-07 12:33:14,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39504 Valid, 39509 Invalid, 2 Unknown, 0 Unchecked, 48.14ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2569.93ms Time] [2021-11-07 12:33:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27560 states. [2021-11-07 12:33:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27560 to 27560. [2021-11-07 12:33:15,584 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) [2021-11-07 12:33:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27560 states to 27560 states and 39510 transitions. [2021-11-07 12:33:15,656 INFO L78 Accepts]: Start accepts. Automaton has 27560 states and 39510 transitions. Word has length 8 [2021-11-07 12:33:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:33:15,656 INFO L470 AbstractCegarLoop]: Abstraction has 27560 states and 39510 transitions. [2021-11-07 12:33:15,657 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) [2021-11-07 12:33:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 27560 states and 39510 transitions. [2021-11-07 12:33:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 12:33:15,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:33:15,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:33:15,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 12:33:15,658 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)] === [2021-11-07 12:33:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:33:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1273838825, now seen corresponding path program 1 times [2021-11-07 12:33:15,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:33:15,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848749404] [2021-11-07 12:33:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:33:15,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:33:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:33:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:33:16,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:33:16,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848749404] [2021-11-07 12:33:16,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848749404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:33:16,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:33:16,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:33:16,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613400724] [2021-11-07 12:33:16,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:33:16,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:33:16,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:33:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:33:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:33:16,811 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) [2021-11-07 12:33:19,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []