./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 173e3943 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-dev-173e394 [2021-11-06 13:55:25,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 13:55:25,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 13:55:25,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 13:55:25,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 13:55:25,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 13:55:25,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 13:55:25,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 13:55:25,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 13:55:25,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 13:55:25,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 13:55:25,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 13:55:25,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 13:55:25,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 13:55:25,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 13:55:25,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 13:55:25,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 13:55:25,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 13:55:25,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 13:55:25,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 13:55:25,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 13:55:25,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 13:55:25,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 13:55:25,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 13:55:25,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 13:55:25,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 13:55:25,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 13:55:25,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 13:55:25,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 13:55:25,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 13:55:25,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 13:55:25,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 13:55:25,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 13:55:25,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 13:55:25,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 13:55:25,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 13:55:25,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 13:55:25,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 13:55:25,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 13:55:25,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 13:55:25,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 13:55:25,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 13:55:25,236 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 13:55:25,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 13:55:25,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 13:55:25,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 13:55:25,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 13:55:25,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 13:55:25,243 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 13:55:25,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 13:55:25,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 13:55:25,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 13:55:25,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 13:55:25,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 13:55:25,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 13:55:25,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 13:55:25,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 13:55:25,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 13:55:25,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 13:55:25,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 13:55:25,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 13:55:25,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 13:55:25,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 13:55:25,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 13:55:25,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 13:55:25,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 13:55:25,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 13:55:25,246 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 13:55:25,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 13:55:25,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 13:55:25,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 13:55:25,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 213c19133f8e1eb8e04c1430c89bd3923e29e833639b74dc68815899bbf3f9fa [2021-11-06 13:55:25,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 13:55:25,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 13:55:25,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 13:55:25,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 13:55:25,460 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 13:55:25,461 INFO L432 ainManager$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 [2021-11-06 13:55:25,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3320ade7c/3357ce203f414aa7839fd5341636068f/FLAG40e4b6c70 [2021-11-06 13:55:26,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 13:55:26,240 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 [2021-11-06 13:55:26,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3320ade7c/3357ce203f414aa7839fd5341636068f/FLAG40e4b6c70 [2021-11-06 13:55:26,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3320ade7c/3357ce203f414aa7839fd5341636068f [2021-11-06 13:55:26,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 13:55:26,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 13:55:26,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 13:55:26,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 13:55:26,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 13:55:26,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:55:26" (1/1) ... [2021-11-06 13:55:26,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1eae3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:26, skipping insertion in model container [2021-11-06 13:55:26,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:55:26" (1/1) ... [2021-11-06 13:55:26,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 13:55:26,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 13:55:29,357 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] [2021-11-06 13:55:29,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 13:55:29,631 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 13:55:30,419 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] [2021-11-06 13:55:30,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 13:55:30,578 INFO L208 MainTranslator]: Completed translation [2021-11-06 13:55:30,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30 WrapperNode [2021-11-06 13:55:30,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 13:55:30,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 13:55:30,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 13:55:30,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 13:55:30,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:30,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:33,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 13:55:33,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 13:55:33,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 13:55:33,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 13:55:33,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:33,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:34,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:34,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:35,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:36,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:36,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:37,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 13:55:37,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 13:55:37,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 13:55:37,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 13:55:37,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (1/1) ... [2021-11-06 13:55:37,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 13:55:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:55:37,408 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) [2021-11-06 13:55:37,428 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 [2021-11-06 13:55:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_mmap [2021-11-06 13:55:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 13:55:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 13:55:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-06 13:55:37,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-06 13:55:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 13:55:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 13:55:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_subscribe_event [2021-11-06 13:55:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 13:55:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 13:55:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 13:55:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-06 13:55:37,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-06 13:55:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_start_analog_streaming [2021-11-06 13:55:37,441 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_start_analog_streaming [2021-11-06 13:55:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_event_unsubscribe [2021-11-06 13:55:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 13:55:37,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 13:55:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_poll [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_v4l2_open [2021-11-06 13:55:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_v4l2_open [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 13:55:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_wake_i2c [2021-11-06 13:55:37,443 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_wake_i2c [2021-11-06 13:55:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 13:58:12,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 13:58:12,422 INFO L299 CfgBuilder]: Removed 18920 assume(true) statements. [2021-11-06 13:58:12,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:58:12 BoogieIcfgContainer [2021-11-06 13:58:12,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 13:58:12,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 13:58:12,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 13:58:12,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 13:58:12,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 01:55:26" (1/3) ... [2021-11-06 13:58:12,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56694f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:58:12, skipping insertion in model container [2021-11-06 13:58:12,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:55:30" (2/3) ... [2021-11-06 13:58:12,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56694f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:58:12, skipping insertion in model container [2021-11-06 13:58:12,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:58:12" (3/3) ... [2021-11-06 13:58:12,448 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-06 13:58:12,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 13:58:12,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1068 error locations. [2021-11-06 13:58:12,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 13:58:12,541 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 [2021-11-06 13:58:12,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1068 error locations. [2021-11-06 13:58:12,812 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) [2021-11-06 13:58:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-06 13:58:12,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:58:12,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-06 13:58:12,816 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)] === [2021-11-06 13:58:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:58:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2051723242, now seen corresponding path program 1 times [2021-11-06 13:58:12,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:58:12,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182911636] [2021-11-06 13:58:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:58:12,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:58:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:58:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:58:14,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:58:14,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182911636] [2021-11-06 13:58:14,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182911636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:58:14,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:58:14,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:58:14,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159476682] [2021-11-06 13:58:14,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:58:14,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:58:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:58:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:14,437 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) [2021-11-06 13:58:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:58:20,055 INFO L93 Difference]: Finished difference Result 56102 states and 82222 transitions. [2021-11-06 13:58:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:58:20,057 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 [2021-11-06 13:58:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:58:20,161 INFO L225 Difference]: With dead ends: 56102 [2021-11-06 13:58:20,162 INFO L226 Difference]: Without dead ends: 27564 [2021-11-06 13:58:20,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27564 states. [2021-11-06 13:58:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27564 to 27564. [2021-11-06 13:58:20,948 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) [2021-11-06 13:58:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27564 states to 27564 states and 39514 transitions. [2021-11-06 13:58:21,055 INFO L78 Accepts]: Start accepts. Automaton has 27564 states and 39514 transitions. Word has length 6 [2021-11-06 13:58:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:58:21,055 INFO L470 AbstractCegarLoop]: Abstraction has 27564 states and 39514 transitions. [2021-11-06 13:58:21,056 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) [2021-11-06 13:58:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 27564 states and 39514 transitions. [2021-11-06 13:58:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-06 13:58:21,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:58:21,057 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:58:21,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 13:58:21,058 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)] === [2021-11-06 13:58:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:58:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash -821022145, now seen corresponding path program 1 times [2021-11-06 13:58:21,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:58:21,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080480651] [2021-11-06 13:58:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:58:21,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:58:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:58:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:58:22,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:58:22,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080480651] [2021-11-06 13:58:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080480651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:58:22,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:58:22,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:58:22,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969777663] [2021-11-06 13:58:22,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:58:22,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:58:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:58:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:22,052 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) [2021-11-06 13:58:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:58:25,052 INFO L93 Difference]: Finished difference Result 27564 states and 39514 transitions. [2021-11-06 13:58:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:58:25,053 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 [2021-11-06 13:58:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:58:25,107 INFO L225 Difference]: With dead ends: 27564 [2021-11-06 13:58:25,107 INFO L226 Difference]: Without dead ends: 27562 [2021-11-06 13:58:25,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27562 states. [2021-11-06 13:58:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27562 to 27562. [2021-11-06 13:58:25,543 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) [2021-11-06 13:58:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27562 states to 27562 states and 39512 transitions. [2021-11-06 13:58:25,597 INFO L78 Accepts]: Start accepts. Automaton has 27562 states and 39512 transitions. Word has length 7 [2021-11-06 13:58:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:58:25,598 INFO L470 AbstractCegarLoop]: Abstraction has 27562 states and 39512 transitions. [2021-11-06 13:58:25,599 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) [2021-11-06 13:58:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 27562 states and 39512 transitions. [2021-11-06 13:58:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-06 13:58:25,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:58:25,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:58:25,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 13:58:25,604 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)] === [2021-11-06 13:58:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:58:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash 318184084, now seen corresponding path program 1 times [2021-11-06 13:58:25,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:58:25,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527337602] [2021-11-06 13:58:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:58:25,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:58:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:58:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:58:26,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:58:26,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527337602] [2021-11-06 13:58:26,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527337602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:58:26,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:58:26,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:58:26,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717021887] [2021-11-06 13:58:26,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:58:26,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:58:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:58:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:26,429 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) [2021-11-06 13:58:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:58:29,220 INFO L93 Difference]: Finished difference Result 27562 states and 39512 transitions. [2021-11-06 13:58:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:58:29,221 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 [2021-11-06 13:58:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:58:29,276 INFO L225 Difference]: With dead ends: 27562 [2021-11-06 13:58:29,276 INFO L226 Difference]: Without dead ends: 27560 [2021-11-06 13:58:29,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27560 states. [2021-11-06 13:58:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27560 to 27560. [2021-11-06 13:58:29,852 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) [2021-11-06 13:58:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27560 states to 27560 states and 39510 transitions. [2021-11-06 13:58:29,907 INFO L78 Accepts]: Start accepts. Automaton has 27560 states and 39510 transitions. Word has length 8 [2021-11-06 13:58:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:58:29,907 INFO L470 AbstractCegarLoop]: Abstraction has 27560 states and 39510 transitions. [2021-11-06 13:58:29,908 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) [2021-11-06 13:58:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27560 states and 39510 transitions. [2021-11-06 13:58:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-06 13:58:29,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:58:29,908 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:58:29,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 13:58:29,909 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)] === [2021-11-06 13:58:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:58:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1273838825, now seen corresponding path program 1 times [2021-11-06 13:58:29,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:58:29,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512217143] [2021-11-06 13:58:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:58:29,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:58:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:58:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:58:30,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:58:30,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512217143] [2021-11-06 13:58:30,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512217143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:58:30,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:58:30,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:58:30,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492927311] [2021-11-06 13:58:30,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:58:30,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:58:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:58:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:30,704 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) [2021-11-06 13:58:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:58:34,168 INFO L93 Difference]: Finished difference Result 80350 states and 115345 transitions. [2021-11-06 13:58:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:58:34,169 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 [2021-11-06 13:58:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:58:34,317 INFO L225 Difference]: With dead ends: 80350 [2021-11-06 13:58:34,317 INFO L226 Difference]: Without dead ends: 52792 [2021-11-06 13:58:34,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52792 states. [2021-11-06 13:58:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52792 to 51740. [2021-11-06 13:58:35,662 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) [2021-11-06 13:58:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51740 states to 51740 states and 75296 transitions. [2021-11-06 13:58:35,768 INFO L78 Accepts]: Start accepts. Automaton has 51740 states and 75296 transitions. Word has length 9 [2021-11-06 13:58:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:58:35,768 INFO L470 AbstractCegarLoop]: Abstraction has 51740 states and 75296 transitions. [2021-11-06 13:58:35,768 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) [2021-11-06 13:58:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 51740 states and 75296 transitions. [2021-11-06 13:58:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-06 13:58:35,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:58:35,769 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:58:35,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 13:58:35,769 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)] === [2021-11-06 13:58:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:58:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash 834364734, now seen corresponding path program 1 times [2021-11-06 13:58:35,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:58:35,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885741986] [2021-11-06 13:58:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:58:35,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:58:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:58:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:58:36,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:58:36,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885741986] [2021-11-06 13:58:36,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885741986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:58:36,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:58:36,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:58:36,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052123426] [2021-11-06 13:58:36,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:58:36,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:58:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:58:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:36,541 INFO L87 Difference]: Start difference. First operand 51740 states and 75296 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-06 13:58:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:58:39,829 INFO L93 Difference]: Finished difference Result 51740 states and 75296 transitions. [2021-11-06 13:58:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:58:39,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-11-06 13:58:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:58:39,928 INFO L225 Difference]: With dead ends: 51740 [2021-11-06 13:58:39,929 INFO L226 Difference]: Without dead ends: 51738 [2021-11-06 13:58:39,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51738 states. [2021-11-06 13:58:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51738 to 51738. [2021-11-06 13:58:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51738 states, 51114 states have (on average 1.4720820127558008) internal successors, (75244), 51708 states have internal predecessors, (75244), 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) [2021-11-06 13:58:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51738 states to 51738 states and 75294 transitions. [2021-11-06 13:58:41,134 INFO L78 Accepts]: Start accepts. Automaton has 51738 states and 75294 transitions. Word has length 10 [2021-11-06 13:58:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:58:41,137 INFO L470 AbstractCegarLoop]: Abstraction has 51738 states and 75294 transitions. [2021-11-06 13:58:41,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-06 13:58:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 51738 states and 75294 transitions. [2021-11-06 13:58:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-06 13:58:41,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:58:41,138 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:58:41,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 13:58:41,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr547ASSERT_VIOLATIONERROR_FUNCTION === [em28xx_v4l2_openErr0ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr1ASSERT_VIOLATIONERROR_FUNCTION, em28xx_v4l2_openErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1065 more)] === [2021-11-06 13:58:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:58:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash 95569811, now seen corresponding path program 1 times [2021-11-06 13:58:41,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:58:41,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973007961] [2021-11-06 13:58:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:58:41,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:58:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:58:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:58:41,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:58:41,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973007961] [2021-11-06 13:58:41,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973007961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:58:41,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:58:41,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:58:41,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054222911] [2021-11-06 13:58:41,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:58:41,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:58:41,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:58:41,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:58:41,887 INFO L87 Difference]: Start difference. First operand 51738 states and 75294 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-06 13:58:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:58:45,164 INFO L93 Difference]: Finished difference Result 51738 states and 75294 transitions. [2021-11-06 13:58:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:58:45,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-11-06 13:58:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted.