./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU --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 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:37:57,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:37:57,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:37:57,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:37:57,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:37:57,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:37:57,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:37:57,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:37:57,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:37:57,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:37:57,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:37:57,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:37:57,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:37:57,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:37:57,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:37:57,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:37:57,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:37:57,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:37:57,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:37:57,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:37:57,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:37:57,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:37:57,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:37:57,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:37:57,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:37:57,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:37:57,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:37:57,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:37:57,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:37:57,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:37:57,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:37:57,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:37:57,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:37:57,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:37:57,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:37:57,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:37:57,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:37:57,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:37:57,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:37:57,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:37:57,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:37:57,792 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 22:37:57,833 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:37:57,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:37:57,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:37:57,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:37:57,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:37:57,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:37:57,842 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:37:57,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:37:57,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:37:57,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:37:57,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:37:57,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:37:57,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:37:57,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:37:57,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:37:57,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:37:57,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:37:57,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:37:57,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:37:57,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:37:57,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:37:57,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:37:57,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:37:57,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:37:57,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:37:57,848 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:37:57,848 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:37:57,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:37:57,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:37:57,850 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d [2021-11-02 22:37:58,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:37:58,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:37:58,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:37:58,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:37:58,155 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:37:58,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-02 22:37:58,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/data/c8264d07d/d17b4eb3930c4134ad38aec042256ad4/FLAGdf880dd24 [2021-11-02 22:37:59,197 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:37:59,198 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-02 22:37:59,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/data/c8264d07d/d17b4eb3930c4134ad38aec042256ad4/FLAGdf880dd24 [2021-11-02 22:37:59,726 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/data/c8264d07d/d17b4eb3930c4134ad38aec042256ad4 [2021-11-02 22:37:59,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:37:59,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:37:59,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:37:59,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:37:59,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:37:59,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:37:59" (1/1) ... [2021-11-02 22:37:59,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fec59f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:37:59, skipping insertion in model container [2021-11-02 22:37:59,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:37:59" (1/1) ... [2021-11-02 22:37:59,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:37:59,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:38:01,205 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[119996,120009] [2021-11-02 22:38:02,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:38:02,437 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:38:02,596 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[119996,120009] [2021-11-02 22:38:03,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:38:03,141 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:38:03,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03 WrapperNode [2021-11-02 22:38:03,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:38:03,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:38:03,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:38:03,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:38:03,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:03,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:03,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:38:03,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:38:03,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:38:03,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:38:03,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:03,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:03,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:03,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:04,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:04,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:04,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:04,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:38:04,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:38:04,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:38:04,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:38:04,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (1/1) ... [2021-11-02 22:38:04,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:38:04,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:04,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:38:04,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:38:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-02 22:38:04,356 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-02 22:38:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-02 22:38:04,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-02 22:38:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-02 22:38:04,357 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-02 22:38:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-02 22:38:04,358 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-02 22:38:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-02 22:38:04,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-02 22:38:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-02 22:38:04,358 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-02 22:38:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-02 22:38:04,359 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-02 22:38:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-02 22:38:04,359 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-02 22:38:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-02 22:38:04,359 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-02 22:38:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-02 22:38:04,360 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-02 22:38:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-02 22:38:04,360 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-02 22:38:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-02 22:38:04,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-02 22:38:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:38:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-02 22:38:04,361 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-02 22:38:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-11-02 22:38:04,361 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-11-02 22:38:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-02 22:38:04,361 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-02 22:38:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:38:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 22:38:04,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 22:38:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-02 22:38:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-02 22:38:04,362 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-02 22:38:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-02 22:38:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-02 22:38:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-11-02 22:38:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-11-02 22:38:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:38:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:38:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 22:38:04,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 22:38:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-02 22:38:04,364 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-02 22:38:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-02 22:38:04,364 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-02 22:38:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-02 22:38:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-02 22:38:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_bulk_callback [2021-11-02 22:38:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_bulk_callback [2021-11-02 22:38:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-02 22:38:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-02 22:38:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-02 22:38:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-02 22:38:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-02 22:38:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-02 22:38:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:38:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure serial_wait_until_sent [2021-11-02 22:38:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_wait_until_sent [2021-11-02 22:38:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-02 22:38:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-02 22:38:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_41 [2021-11-02 22:38:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_41 [2021-11-02 22:38:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_42 [2021-11-02 22:38:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_42 [2021-11-02 22:38:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-02 22:38:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-02 22:38:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:38:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-02 22:38:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-02 22:38:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-02 22:38:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-02 22:38:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-11-02 22:38:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-11-02 22:38:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:38:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:38:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-02 22:38:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put_4 [2021-11-02 22:38:04,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put_4 [2021-11-02 22:38:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:38:04,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:38:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-02 22:38:04,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-02 22:38:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-02 22:38:04,371 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-02 22:38:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-02 22:38:04,371 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-02 22:38:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-02 22:38:04,371 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-02 22:38:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-02 22:38:04,372 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-02 22:38:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 22:38:04,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 22:38:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:38:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:38:04,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:38:40,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:38:40,540 INFO L299 CfgBuilder]: Removed 1864 assume(true) statements. [2021-11-02 22:38:40,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:38:40 BoogieIcfgContainer [2021-11-02 22:38:40,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:38:40,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:38:40,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:38:40,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:38:40,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:37:59" (1/3) ... [2021-11-02 22:38:40,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de1c632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:38:40, skipping insertion in model container [2021-11-02 22:38:40,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:03" (2/3) ... [2021-11-02 22:38:40,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de1c632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:38:40, skipping insertion in model container [2021-11-02 22:38:40,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:38:40" (3/3) ... [2021-11-02 22:38:40,555 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-02 22:38:40,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:38:40,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-02 22:38:40,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:38:40,625 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 [2021-11-02 22:38:40,625 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-02 22:38:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 2307 states, 2122 states have (on average 1.3836003770028276) internal successors, (2936), 2145 states have internal predecessors, (2936), 129 states have call successors, (129), 43 states have call predecessors, (129), 43 states have return successors, (129), 120 states have call predecessors, (129), 129 states have call successors, (129) [2021-11-02 22:38:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:38:40,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:40,727 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:40,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 22:38:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -235652551, now seen corresponding path program 1 times [2021-11-02 22:38:40,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:40,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315887616] [2021-11-02 22:38:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:40,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:41,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:41,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315887616] [2021-11-02 22:38:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315887616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:41,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:41,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:41,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026828610] [2021-11-02 22:38:41,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:41,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:41,913 INFO L87 Difference]: Start difference. First operand has 2307 states, 2122 states have (on average 1.3836003770028276) internal successors, (2936), 2145 states have internal predecessors, (2936), 129 states have call successors, (129), 43 states have call predecessors, (129), 43 states have return successors, (129), 120 states have call predecessors, (129), 129 states have call successors, (129) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-02 22:38:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:42,162 INFO L93 Difference]: Finished difference Result 4610 states and 6489 transitions. [2021-11-02 22:38:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-11-02 22:38:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:42,209 INFO L225 Difference]: With dead ends: 4610 [2021-11-02 22:38:42,209 INFO L226 Difference]: Without dead ends: 2286 [2021-11-02 22:38:42,234 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 [2021-11-02 22:38:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-02 22:38:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2021-11-02 22:38:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2102 states have (on average 1.329686013320647) internal successors, (2795), 2124 states have internal predecessors, (2795), 129 states have call successors, (129), 43 states have call predecessors, (129), 43 states have return successors, (129), 120 states have call predecessors, (129), 129 states have call successors, (129) [2021-11-02 22:38:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3053 transitions. [2021-11-02 22:38:42,441 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3053 transitions. Word has length 36 [2021-11-02 22:38:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:42,442 INFO L470 AbstractCegarLoop]: Abstraction has 2286 states and 3053 transitions. [2021-11-02 22:38:42,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-02 22:38:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3053 transitions. [2021-11-02 22:38:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:38:42,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:42,448 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:42,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:38:42,449 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 22:38:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash -836889380, now seen corresponding path program 1 times [2021-11-02 22:38:42,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:42,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845543713] [2021-11-02 22:38:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:42,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:38:42,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:42,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845543713] [2021-11-02 22:38:42,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845543713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:42,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:42,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:42,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877908884] [2021-11-02 22:38:43,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:43,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:43,003 INFO L87 Difference]: Start difference. First operand 2286 states and 3053 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-02 22:38:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:45,397 INFO L93 Difference]: Finished difference Result 6559 states and 8825 transitions. [2021-11-02 22:38:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2021-11-02 22:38:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:45,434 INFO L225 Difference]: With dead ends: 6559 [2021-11-02 22:38:45,434 INFO L226 Difference]: Without dead ends: 4351 [2021-11-02 22:38:45,445 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 [2021-11-02 22:38:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-11-02 22:38:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 4339. [2021-11-02 22:38:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 3983 states have (on average 1.3391915641476275) internal successors, (5334), 4016 states have internal predecessors, (5334), 258 states have call successors, (258), 86 states have call predecessors, (258), 86 states have return successors, (258), 240 states have call predecessors, (258), 258 states have call successors, (258) [2021-11-02 22:38:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5850 transitions. [2021-11-02 22:38:45,624 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5850 transitions. Word has length 37 [2021-11-02 22:38:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:45,625 INFO L470 AbstractCegarLoop]: Abstraction has 4339 states and 5850 transitions. [2021-11-02 22:38:45,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-02 22:38:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5850 transitions. [2021-11-02 22:38:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:38:45,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:45,632 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:45,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:38:45,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 22:38:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash -396263666, now seen corresponding path program 1 times [2021-11-02 22:38:45,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:45,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220563248] [2021-11-02 22:38:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:45,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:38:46,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:46,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220563248] [2021-11-02 22:38:46,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220563248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:46,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:46,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:46,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895597785] [2021-11-02 22:38:46,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:46,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:46,016 INFO L87 Difference]: Start difference. First operand 4339 states and 5850 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:46,814 INFO L93 Difference]: Finished difference Result 12096 states and 16285 transitions. [2021-11-02 22:38:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:46,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 22:38:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:46,882 INFO L225 Difference]: With dead ends: 12096 [2021-11-02 22:38:46,883 INFO L226 Difference]: Without dead ends: 7835 [2021-11-02 22:38:46,903 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 [2021-11-02 22:38:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7835 states. [2021-11-02 22:38:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7835 to 7771. [2021-11-02 22:38:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7771 states, 7141 states have (on average 1.337907856042571) internal successors, (9554), 7196 states have internal predecessors, (9554), 452 states have call successors, (452), 166 states have call predecessors, (452), 166 states have return successors, (452), 416 states have call predecessors, (452), 452 states have call successors, (452) [2021-11-02 22:38:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7771 states to 7771 states and 10458 transitions. [2021-11-02 22:38:47,251 INFO L78 Accepts]: Start accepts. Automaton has 7771 states and 10458 transitions. Word has length 47 [2021-11-02 22:38:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:47,251 INFO L470 AbstractCegarLoop]: Abstraction has 7771 states and 10458 transitions. [2021-11-02 22:38:47,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7771 states and 10458 transitions. [2021-11-02 22:38:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:38:47,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:47,258 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:47,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:38:47,259 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 22:38:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:47,260 INFO L85 PathProgramCache]: Analyzing trace with hash -978914495, now seen corresponding path program 1 times [2021-11-02 22:38:47,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:47,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144046137] [2021-11-02 22:38:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:47,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:48,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:48,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144046137] [2021-11-02 22:38:48,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144046137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:48,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582250816] [2021-11-02 22:38:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:48,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:48,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:48,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:38:48,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:38:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 3993 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:38:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:38:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:50,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582250816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:50,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:38:50,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:38:50,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987489194] [2021-11-02 22:38:50,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:38:50,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:38:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:38:50,964 INFO L87 Difference]: Start difference. First operand 7771 states and 10458 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2021-11-02 22:38:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:51,257 INFO L93 Difference]: Finished difference Result 15466 states and 20832 transitions. [2021-11-02 22:38:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:38:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 47 [2021-11-02 22:38:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:51,326 INFO L225 Difference]: With dead ends: 15466 [2021-11-02 22:38:51,327 INFO L226 Difference]: Without dead ends: 7772 [2021-11-02 22:38:51,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:38:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7772 states. [2021-11-02 22:38:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7772 to 7772. [2021-11-02 22:38:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7772 states, 7142 states have (on average 1.3378605432651918) internal successors, (9555), 7197 states have internal predecessors, (9555), 452 states have call successors, (452), 166 states have call predecessors, (452), 166 states have return successors, (452), 416 states have call predecessors, (452), 452 states have call successors, (452) [2021-11-02 22:38:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7772 states to 7772 states and 10459 transitions. [2021-11-02 22:38:51,683 INFO L78 Accepts]: Start accepts. Automaton has 7772 states and 10459 transitions. Word has length 47 [2021-11-02 22:38:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:51,685 INFO L470 AbstractCegarLoop]: Abstraction has 7772 states and 10459 transitions. [2021-11-02 22:38:51,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2021-11-02 22:38:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7772 states and 10459 transitions. [2021-11-02 22:38:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:38:51,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:51,690 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:51,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:38:51,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:51,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 22:38:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:51,904 INFO L85 PathProgramCache]: Analyzing trace with hash 315434174, now seen corresponding path program 2 times [2021-11-02 22:38:51,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:51,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129340117] [2021-11-02 22:38:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:51,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:52,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:52,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129340117] [2021-11-02 22:38:52,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129340117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:52,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883282239] [2021-11-02 22:38:52,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:38:52,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:52,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:52,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:38:52,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25319b6d-54d8-4195-b26d-7fec03176128/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process