./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 4d014703 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-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.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 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 18:10:01,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 18:10:01,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 18:10:01,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 18:10:01,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 18:10:01,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 18:10:01,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 18:10:01,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 18:10:01,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 18:10:01,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 18:10:01,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 18:10:01,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 18:10:01,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 18:10:01,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 18:10:01,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 18:10:01,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 18:10:01,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 18:10:01,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 18:10:01,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 18:10:01,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 18:10:01,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 18:10:01,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 18:10:01,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 18:10:01,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 18:10:01,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 18:10:01,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 18:10:01,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 18:10:01,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 18:10:01,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 18:10:01,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 18:10:01,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 18:10:01,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 18:10:01,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 18:10:01,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 18:10:01,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 18:10:01,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 18:10:01,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 18:10:01,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 18:10:01,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 18:10:01,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 18:10:01,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 18:10:01,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 18:10:01,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 18:10:01,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 18:10:01,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 18:10:01,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 18:10:01,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 18:10:01,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 18:10:01,309 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 18:10:01,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 18:10:01,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 18:10:01,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 18:10:01,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 18:10:01,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 18:10:01,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 18:10:01,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 18:10:01,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 18:10:01,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 18:10:01,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 18:10:01,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 18:10:01,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 18:10:01,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:10:01,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 18:10:01,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 18:10:01,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 18:10:01,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 18:10:01,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 18:10:01,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 18:10:01,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 18:10:01,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 18:10:01,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 18:10:01,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4437765aefc9e8e96e3710e0e55c61aa0f0e29783186331c7ab028aba8558a0d [2021-11-02 18:10:01,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 18:10:01,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 18:10:01,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 18:10:01,564 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 18:10:01,567 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 18:10:01,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../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 18:10:01,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7732a0f/b1201e903cf847bab5433599d1b93244/FLAG0c05f8cab [2021-11-02 18:10:02,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 18:10:02,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/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 18:10:02,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7732a0f/b1201e903cf847bab5433599d1b93244/FLAG0c05f8cab [2021-11-02 18:10:02,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7732a0f/b1201e903cf847bab5433599d1b93244 [2021-11-02 18:10:02,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 18:10:02,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 18:10:02,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 18:10:02,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 18:10:02,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 18:10:02,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:10:02" (1/1) ... [2021-11-02 18:10:02,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b5c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:02, skipping insertion in model container [2021-11-02 18:10:02,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:10:02" (1/1) ... [2021-11-02 18:10:02,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 18:10:02,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 18:10:03,715 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-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 18:10:04,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:10:04,582 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 18:10:04,681 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-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 18:10:04,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:10:05,104 INFO L208 MainTranslator]: Completed translation [2021-11-02 18:10:05,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05 WrapperNode [2021-11-02 18:10:05,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 18:10:05,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 18:10:05,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 18:10:05,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 18:10:05,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:05,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:05,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 18:10:05,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 18:10:05,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 18:10:05,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 18:10:05,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:05,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:05,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:05,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:05,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:05,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:06,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:06,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 18:10:06,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 18:10:06,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 18:10:06,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 18:10:06,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (1/1) ... [2021-11-02 18:10:06,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:10:06,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:10:06,100 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) [2021-11-02 18:10:06,115 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 [2021-11-02 18:10:06,144 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-02 18:10:06,144 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-02 18:10:06,144 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-02 18:10:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-02 18:10:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-02 18:10:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-02 18:10:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-02 18:10:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-02 18:10:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-02 18:10:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-02 18:10:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-02 18:10:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-02 18:10:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-02 18:10:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-02 18:10:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-02 18:10:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-02 18:10:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-02 18:10:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-02 18:10:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-02 18:10:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-02 18:10:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-11-02 18:10:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-11-02 18:10:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-02 18:10:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-02 18:10:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 18:10:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 18:10:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 18:10:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-02 18:10:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-02 18:10:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-02 18:10:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-02 18:10:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-02 18:10:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-11-02 18:10:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-11-02 18:10:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 18:10:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 18:10:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 18:10:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 18:10:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-02 18:10:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-02 18:10:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-02 18:10:06,150 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-02 18:10:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-02 18:10:06,150 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-02 18:10:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_bulk_callback [2021-11-02 18:10:06,150 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_bulk_callback [2021-11-02 18:10:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-02 18:10:06,151 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-02 18:10:06,151 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-02 18:10:06,151 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-02 18:10:06,151 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-02 18:10:06,151 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-02 18:10:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 18:10:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure serial_wait_until_sent [2021-11-02 18:10:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_wait_until_sent [2021-11-02 18:10:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-02 18:10:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-02 18:10:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_41 [2021-11-02 18:10:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_41 [2021-11-02 18:10:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_42 [2021-11-02 18:10:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_42 [2021-11-02 18:10:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-02 18:10:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-02 18:10:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 18:10:06,155 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-02 18:10:06,155 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-02 18:10:06,155 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-02 18:10:06,155 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-02 18:10:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-11-02 18:10:06,156 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-11-02 18:10:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 18:10:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 18:10:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-02 18:10:06,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put_4 [2021-11-02 18:10:06,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put_4 [2021-11-02 18:10:06,157 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 18:10:06,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 18:10:06,157 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-02 18:10:06,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-02 18:10:06,157 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-02 18:10:06,157 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-02 18:10:06,157 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-02 18:10:06,157 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-02 18:10:06,158 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-02 18:10:06,158 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-02 18:10:06,158 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-02 18:10:06,158 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-02 18:10:06,159 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 18:10:06,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 18:10:06,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 18:10:06,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 18:10:06,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 18:10:23,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 18:10:23,557 INFO L299 CfgBuilder]: Removed 1864 assume(true) statements. [2021-11-02 18:10:23,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:10:23 BoogieIcfgContainer [2021-11-02 18:10:23,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 18:10:23,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 18:10:23,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 18:10:23,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 18:10:23,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 06:10:02" (1/3) ... [2021-11-02 18:10:23,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eae5c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:10:23, skipping insertion in model container [2021-11-02 18:10:23,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:10:05" (2/3) ... [2021-11-02 18:10:23,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eae5c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:10:23, skipping insertion in model container [2021-11-02 18:10:23,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:10:23" (3/3) ... [2021-11-02 18:10:23,573 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 18:10:23,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 18:10:23,579 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-02 18:10:23,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 18:10:23,637 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 18:10:23,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-02 18:10:23,688 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 18:10:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 18:10:23,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:10:23,708 INFO L514 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 18:10:23,709 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 18:10:23,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:10:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash -235652551, now seen corresponding path program 1 times [2021-11-02 18:10:23,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:10:23,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809770017] [2021-11-02 18:10:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:10:23,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:10:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:10:24,532 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 18:10:24,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:10:24,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809770017] [2021-11-02 18:10:24,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809770017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:10:24,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:10:24,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:10:24,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333666858] [2021-11-02 18:10:24,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:10:24,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:10:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:10:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:10:24,565 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 18:10:26,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:10:44,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:11:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:11:07,848 INFO L93 Difference]: Finished difference Result 4610 states and 6489 transitions. [2021-11-02 18:11:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:11:07,851 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 18:11:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:11:07,875 INFO L225 Difference]: With dead ends: 4610 [2021-11-02 18:11:07,877 INFO L226 Difference]: Without dead ends: 2286 [2021-11-02 18:11:07,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.78ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:11:07,901 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 3087 mSDsCounter, 0 mSdLazyCounter, 5627 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40010.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 84.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5627 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42610.66ms IncrementalHoareTripleChecker+Time [2021-11-02 18:11:07,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 552 Invalid, 5629 Unknown, 0 Unchecked, 84.43ms Time], IncrementalHoareTripleChecker [0 Valid, 5627 Invalid, 2 Unknown, 0 Unchecked, 42610.66ms Time] [2021-11-02 18:11:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-02 18:11:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2021-11-02 18:11:08,041 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 18:11:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3053 transitions. [2021-11-02 18:11:08,061 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3053 transitions. Word has length 36 [2021-11-02 18:11:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:11:08,062 INFO L470 AbstractCegarLoop]: Abstraction has 2286 states and 3053 transitions. [2021-11-02 18:11:08,062 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 18:11:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3053 transitions. [2021-11-02 18:11:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 18:11:08,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:11:08,070 INFO L514 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 18:11:08,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 18:11:08,071 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 18:11:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:11:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash -836889380, now seen corresponding path program 1 times [2021-11-02 18:11:08,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:11:08,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859291449] [2021-11-02 18:11:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:11:08,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:11:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:11:08,477 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 18:11:08,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:11:08,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859291449] [2021-11-02 18:11:08,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859291449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:11:08,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:11:08,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:11:08,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284410413] [2021-11-02 18:11:08,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:11:08,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:11:08,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:11:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:11:08,480 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 18:11:10,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:11:21,038 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:11:52,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:11:52,218 INFO L93 Difference]: Finished difference Result 6564 states and 8832 transitions. [2021-11-02 18:11:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:11:52,218 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 18:11:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:11:52,246 INFO L225 Difference]: With dead ends: 6564 [2021-11-02 18:11:52,247 INFO L226 Difference]: Without dead ends: 4356 [2021-11-02 18:11:52,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.90ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:11:52,259 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 2816 mSDsluCounter, 3021 mSDsCounter, 0 mSdLazyCounter, 5563 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41128.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2816 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 5568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 78.78ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5563 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43013.01ms IncrementalHoareTripleChecker+Time [2021-11-02 18:11:52,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2816 Valid, 645 Invalid, 5568 Unknown, 0 Unchecked, 78.78ms Time], IncrementalHoareTripleChecker [3 Valid, 5563 Invalid, 2 Unknown, 0 Unchecked, 43013.01ms Time] [2021-11-02 18:11:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-11-02 18:11:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 4344. [2021-11-02 18:11:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4344 states, 3988 states have (on average 1.3392678034102308) internal successors, (5341), 4021 states have internal predecessors, (5341), 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 18:11:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 5857 transitions. [2021-11-02 18:11:52,385 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 5857 transitions. Word has length 37 [2021-11-02 18:11:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:11:52,386 INFO L470 AbstractCegarLoop]: Abstraction has 4344 states and 5857 transitions. [2021-11-02 18:11:52,386 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 18:11:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 5857 transitions. [2021-11-02 18:11:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 18:11:52,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:11:52,394 INFO L514 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 18:11:52,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 18:11:52,395 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 18:11:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:11:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash -396263666, now seen corresponding path program 1 times [2021-11-02 18:11:52,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:11:52,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072811491] [2021-11-02 18:11:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:11:52,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:11:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:11:52,800 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 18:11:52,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:11:52,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072811491] [2021-11-02 18:11:52,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072811491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:11:52,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:11:52,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:11:52,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156661744] [2021-11-02 18:11:52,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:11:52,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:11:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:11:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:11:52,802 INFO L87 Difference]: Start difference. First operand 4344 states and 5857 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 18:11:54,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:12:03,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:12:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:12:39,438 INFO L93 Difference]: Finished difference Result 12077 states and 16265 transitions. [2021-11-02 18:12:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:12:39,439 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 18:12:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:12:39,476 INFO L225 Difference]: With dead ends: 12077 [2021-11-02 18:12:39,476 INFO L226 Difference]: Without dead ends: 7811 [2021-11-02 18:12:39,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.77ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:12:39,495 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 2360 mSDsluCounter, 2953 mSDsCounter, 0 mSdLazyCounter, 5610 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43429.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2360 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 5613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5610 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45916.87ms IncrementalHoareTripleChecker+Time [2021-11-02 18:12:39,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2360 Valid, 614 Invalid, 5613 Unknown, 0 Unchecked, 51.07ms Time], IncrementalHoareTripleChecker [1 Valid, 5610 Invalid, 2 Unknown, 0 Unchecked, 45916.87ms Time] [2021-11-02 18:12:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7811 states. [2021-11-02 18:12:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7811 to 7747. [2021-11-02 18:12:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7747 states, 7117 states have (on average 1.3386258254882675) internal successors, (9527), 7172 states have internal predecessors, (9527), 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 18:12:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7747 states to 7747 states and 10431 transitions. [2021-11-02 18:12:39,717 INFO L78 Accepts]: Start accepts. Automaton has 7747 states and 10431 transitions. Word has length 47 [2021-11-02 18:12:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:12:39,721 INFO L470 AbstractCegarLoop]: Abstraction has 7747 states and 10431 transitions. [2021-11-02 18:12:39,721 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 18:12:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7747 states and 10431 transitions. [2021-11-02 18:12:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 18:12:39,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:12:39,725 INFO L514 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 18:12:39,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 18:12:39,725 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 18:12:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:12:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash -978914495, now seen corresponding path program 1 times [2021-11-02 18:12:39,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:12:39,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530026154] [2021-11-02 18:12:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:12:39,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:12:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:12:40,614 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 18:12:40,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:12:40,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530026154] [2021-11-02 18:12:40,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530026154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 18:12:40,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375405262] [2021-11-02 18:12:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:12:40,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:12:40,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:12:40,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 18:12:40,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 18:12:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:12:42,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 3993 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 18:12:42,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:12:43,050 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 18:12:43,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:12:43,504 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 18:12:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375405262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 18:12:43,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 18:12:43,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-02 18:12:43,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855994201] [2021-11-02 18:12:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 18:12:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:12:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 18:12:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 18:12:43,506 INFO L87 Difference]: Start difference. First operand 7747 states and 10431 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 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 18:12:45,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:13:07,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:14:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:14:08,408 INFO L93 Difference]: Finished difference Result 15420 states and 20782 transitions. [2021-11-02 18:14:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 18:14:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 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 18:14:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:14:08,445 INFO L225 Difference]: With dead ends: 15420 [2021-11-02 18:14:08,446 INFO L226 Difference]: Without dead ends: 7750 [2021-11-02 18:14:08,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 425.05ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 18:14:08,475 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 0 mSDsluCounter, 9141 mSDsCounter, 0 mSdLazyCounter, 11167 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79751.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 11172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 84.23ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11167 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84273.74ms IncrementalHoareTripleChecker+Time [2021-11-02 18:14:08,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1032 Invalid, 11172 Unknown, 0 Unchecked, 84.23ms Time], IncrementalHoareTripleChecker [3 Valid, 11167 Invalid, 2 Unknown, 0 Unchecked, 84273.74ms Time] [2021-11-02 18:14:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7750 states. [2021-11-02 18:14:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7750 to 7750. [2021-11-02 18:14:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7120 states have (on average 1.3384831460674158) internal successors, (9530), 7175 states have internal predecessors, (9530), 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 18:14:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 10434 transitions. [2021-11-02 18:14:08,661 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 10434 transitions. Word has length 47 [2021-11-02 18:14:08,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:14:08,663 INFO L470 AbstractCegarLoop]: Abstraction has 7750 states and 10434 transitions. [2021-11-02 18:14:08,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 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 18:14:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 10434 transitions. [2021-11-02 18:14:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 18:14:08,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:14:08,666 INFO L514 BasicCegarLoop]: trace histogram [4, 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 18:14:08,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 18:14:08,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:14:08,889 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 18:14:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:14:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash 114092318, now seen corresponding path program 2 times [2021-11-02 18:14:08,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:14:08,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195032439] [2021-11-02 18:14:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:14:08,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:14:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:14:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:14:09,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:14:09,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195032439] [2021-11-02 18:14:09,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195032439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:14:09,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:14:09,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 18:14:09,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109528731] [2021-11-02 18:14:09,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:14:09,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:14:09,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:14:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:14:09,524 INFO L87 Difference]: Start difference. First operand 7750 states and 10434 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 18:14:11,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:14:19,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:14:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:14:59,788 INFO L93 Difference]: Finished difference Result 23052 states and 32274 transitions. [2021-11-02 18:14:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:14:59,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 50 [2021-11-02 18:14:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:14:59,862 INFO L225 Difference]: With dead ends: 23052 [2021-11-02 18:14:59,862 INFO L226 Difference]: Without dead ends: 15383 [2021-11-02 18:15:00,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.25ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:15:00,017 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 3068 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 5988 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46422.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3068 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 5998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.44ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5988 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49516.05ms IncrementalHoareTripleChecker+Time [2021-11-02 18:15:00,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3068 Valid, 794 Invalid, 5998 Unknown, 0 Unchecked, 48.44ms Time], IncrementalHoareTripleChecker [8 Valid, 5988 Invalid, 2 Unknown, 0 Unchecked, 49516.05ms Time] [2021-11-02 18:15:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15383 states. [2021-11-02 18:15:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15383 to 15357. [2021-11-02 18:15:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15357 states, 14109 states have (on average 1.3390743497058615) internal successors, (18893), 14208 states have internal predecessors, (18893), 904 states have call successors, (904), 332 states have call predecessors, (904), 332 states have return successors, (1326), 832 states have call predecessors, (1326), 904 states have call successors, (1326) [2021-11-02 18:15:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15357 states to 15357 states and 21123 transitions. [2021-11-02 18:15:00,414 INFO L78 Accepts]: Start accepts. Automaton has 15357 states and 21123 transitions. Word has length 50 [2021-11-02 18:15:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:15:00,415 INFO L470 AbstractCegarLoop]: Abstraction has 15357 states and 21123 transitions. [2021-11-02 18:15:00,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 18:15:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 15357 states and 21123 transitions. [2021-11-02 18:15:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 18:15:00,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:15:00,420 INFO L514 BasicCegarLoop]: trace histogram [4, 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 18:15:00,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 18:15:00,420 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 18:15:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:15:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash -758101660, now seen corresponding path program 1 times [2021-11-02 18:15:00,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:15:00,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650483179] [2021-11-02 18:15:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:15:00,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:15:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:15:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:15:00,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:15:00,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650483179] [2021-11-02 18:15:00,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650483179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:15:00,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:15:00,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 18:15:00,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80116061] [2021-11-02 18:15:00,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:15:00,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:15:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:15:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:15:00,983 INFO L87 Difference]: Start difference. First operand 15357 states and 21123 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 18:15:03,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:15:10,972 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:15:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:15:53,014 INFO L93 Difference]: Finished difference Result 45857 states and 66841 transitions. [2021-11-02 18:15:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:15:53,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 51 [2021-11-02 18:15:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:15:53,341 INFO L225 Difference]: With dead ends: 45857 [2021-11-02 18:15:53,342 INFO L226 Difference]: Without dead ends: 30581 [2021-11-02 18:15:53,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.04ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:15:53,420 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 3068 mSDsluCounter, 2964 mSDsCounter, 0 mSdLazyCounter, 6028 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47607.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3068 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 6033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6028 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50915.41ms IncrementalHoareTripleChecker+Time [2021-11-02 18:15:53,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3068 Valid, 793 Invalid, 6033 Unknown, 0 Unchecked, 48.39ms Time], IncrementalHoareTripleChecker [3 Valid, 6028 Invalid, 2 Unknown, 0 Unchecked, 50915.41ms Time] [2021-11-02 18:15:53,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30581 states. [2021-11-02 18:15:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30581 to 30556. [2021-11-02 18:15:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30556 states, 28072 states have (on average 1.339021088629239) internal successors, (37589), 28259 states have internal predecessors, (37589), 1808 states have call successors, (1808), 664 states have call predecessors, (1808), 664 states have return successors, (3990), 1664 states have call predecessors, (3990), 1808 states have call successors, (3990) [2021-11-02 18:15:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30556 states to 30556 states and 43387 transitions. [2021-11-02 18:15:54,291 INFO L78 Accepts]: Start accepts. Automaton has 30556 states and 43387 transitions. Word has length 51 [2021-11-02 18:15:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:15:54,292 INFO L470 AbstractCegarLoop]: Abstraction has 30556 states and 43387 transitions. [2021-11-02 18:15:54,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 18:15:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30556 states and 43387 transitions. [2021-11-02 18:15:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 18:15:54,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:15:54,296 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1] [2021-11-02 18:15:54,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 18:15:54,296 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 18:15:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:15:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2026311192, now seen corresponding path program 1 times [2021-11-02 18:15:54,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:15:54,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235855092] [2021-11-02 18:15:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:15:54,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:15:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:15:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:15:54,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:15:54,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235855092] [2021-11-02 18:15:54,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235855092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:15:54,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:15:54,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 18:15:54,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068215678] [2021-11-02 18:15:54,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:15:54,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:15:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:15:54,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:15:54,637 INFO L87 Difference]: Start difference. First operand 30556 states and 43387 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 18:15:56,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:16:04,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:16:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:16:46,463 INFO L93 Difference]: Finished difference Result 30575 states and 43398 transitions. [2021-11-02 18:16:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:16:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 52 [2021-11-02 18:16:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:16:46,604 INFO L225 Difference]: With dead ends: 30575 [2021-11-02 18:16:46,605 INFO L226 Difference]: Without dead ends: 30573 [2021-11-02 18:16:46,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.84ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:16:46,633 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 3065 mSDsluCounter, 2963 mSDsCounter, 0 mSdLazyCounter, 6022 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47312.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 6026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6022 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50756.05ms IncrementalHoareTripleChecker+Time [2021-11-02 18:16:46,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 793 Invalid, 6026 Unknown, 0 Unchecked, 45.58ms Time], IncrementalHoareTripleChecker [2 Valid, 6022 Invalid, 2 Unknown, 0 Unchecked, 50756.05ms Time] [2021-11-02 18:16:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30573 states. [2021-11-02 18:16:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30573 to 30557. [2021-11-02 18:16:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30557 states, 28073 states have (on average 1.3390090122181455) internal successors, (37590), 28260 states have internal predecessors, (37590), 1808 states have call successors, (1808), 664 states have call predecessors, (1808), 664 states have return successors, (3990), 1664 states have call predecessors, (3990), 1808 states have call successors, (3990) [2021-11-02 18:16:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30557 states to 30557 states and 43388 transitions. [2021-11-02 18:16:47,552 INFO L78 Accepts]: Start accepts. Automaton has 30557 states and 43388 transitions. Word has length 52 [2021-11-02 18:16:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:16:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 30557 states and 43388 transitions. [2021-11-02 18:16:47,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 18:16:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 30557 states and 43388 transitions. [2021-11-02 18:16:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 18:16:47,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:16:47,558 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-11-02 18:16:47,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 18:16:47,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 18:16:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:16:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2070825804, now seen corresponding path program 1 times [2021-11-02 18:16:47,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:16:47,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575586729] [2021-11-02 18:16:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:16:47,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:16:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:16:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:16:47,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:16:47,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575586729] [2021-11-02 18:16:47,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575586729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:16:47,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:16:47,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:16:47,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164836700] [2021-11-02 18:16:47,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:16:47,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:16:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:16:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:16:47,826 INFO L87 Difference]: Start difference. First operand 30557 states and 43388 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:16:49,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:16:56,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:17:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:17:43,751 INFO L93 Difference]: Finished difference Result 90315 states and 131035 transitions. [2021-11-02 18:17:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:17:43,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 18:17:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:17:44,137 INFO L225 Difference]: With dead ends: 90315 [2021-11-02 18:17:44,137 INFO L226 Difference]: Without dead ends: 59839 [2021-11-02 18:17:44,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.89ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:17:44,536 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 2899 mSDsluCounter, 3049 mSDsCounter, 0 mSdLazyCounter, 6476 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50399.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2899 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 6481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.90ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6476 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54118.43ms IncrementalHoareTripleChecker+Time [2021-11-02 18:17:44,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2899 Valid, 754 Invalid, 6481 Unknown, 0 Unchecked, 45.90ms Time], IncrementalHoareTripleChecker [3 Valid, 6476 Invalid, 2 Unknown, 0 Unchecked, 54118.43ms Time] [2021-11-02 18:17:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59839 states. [2021-11-02 18:17:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59839 to 59609. [2021-11-02 18:17:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59609 states, 54853 states have (on average 1.3385229613694785) internal successors, (73422), 55168 states have internal predecessors, (73422), 3440 states have call successors, (3440), 1304 states have call predecessors, (3440), 1304 states have return successors, (10616), 3192 states have call predecessors, (10616), 3440 states have call successors, (10616) [2021-11-02 18:17:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59609 states to 59609 states and 87478 transitions. [2021-11-02 18:17:47,112 INFO L78 Accepts]: Start accepts. Automaton has 59609 states and 87478 transitions. Word has length 55 [2021-11-02 18:17:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:17:47,114 INFO L470 AbstractCegarLoop]: Abstraction has 59609 states and 87478 transitions. [2021-11-02 18:17:47,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:17:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 59609 states and 87478 transitions. [2021-11-02 18:17:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 18:17:47,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:17:47,116 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-11-02 18:17:47,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 18:17:47,117 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 18:17:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:17:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1608866286, now seen corresponding path program 1 times [2021-11-02 18:17:47,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:17:47,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663826535] [2021-11-02 18:17:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:17:47,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:17:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:17:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:17:47,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:17:47,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663826535] [2021-11-02 18:17:47,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663826535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:17:47,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:17:47,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 18:17:47,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662996409] [2021-11-02 18:17:47,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:17:47,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:17:47,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:17:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:17:47,425 INFO L87 Difference]: Start difference. First operand 59609 states and 87478 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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 18:17:49,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:17:56,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:18:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:18:44,890 INFO L93 Difference]: Finished difference Result 148446 states and 224010 transitions. [2021-11-02 18:18:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:18:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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 53 [2021-11-02 18:18:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:18:45,564 INFO L225 Difference]: With dead ends: 148446 [2021-11-02 18:18:45,564 INFO L226 Difference]: Without dead ends: 88918 [2021-11-02 18:18:45,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.30ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:18:45,849 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 2886 mSDsluCounter, 2975 mSDsCounter, 0 mSdLazyCounter, 6442 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50278.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2886 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 6451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.17ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 6442 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54193.99ms IncrementalHoareTripleChecker+Time [2021-11-02 18:18:45,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2886 Valid, 731 Invalid, 6451 Unknown, 0 Unchecked, 44.17ms Time], IncrementalHoareTripleChecker [7 Valid, 6442 Invalid, 2 Unknown, 0 Unchecked, 54193.99ms Time] [2021-11-02 18:18:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88918 states. [2021-11-02 18:18:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88918 to 88326. [2021-11-02 18:18:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88326 states, 81282 states have (on average 1.3387711916537486) internal successors, (108818), 81787 states have internal predecessors, (108818), 5088 states have call successors, (5088), 1944 states have call predecessors, (5088), 1944 states have return successors, (17062), 4674 states have call predecessors, (17062), 5088 states have call successors, (17062) [2021-11-02 18:18:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88326 states to 88326 states and 130968 transitions. [2021-11-02 18:18:49,271 INFO L78 Accepts]: Start accepts. Automaton has 88326 states and 130968 transitions. Word has length 53 [2021-11-02 18:18:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:18:49,271 INFO L470 AbstractCegarLoop]: Abstraction has 88326 states and 130968 transitions. [2021-11-02 18:18:49,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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 18:18:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 88326 states and 130968 transitions. [2021-11-02 18:18:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 18:18:49,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:18:49,274 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1] [2021-11-02 18:18:49,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 18:18:49,274 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 18:18:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:18:49,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1664748878, now seen corresponding path program 1 times [2021-11-02 18:18:49,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:18:49,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714542703] [2021-11-02 18:18:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:18:49,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:18:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:18:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:18:49,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:18:49,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714542703] [2021-11-02 18:18:49,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714542703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:18:49,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:18:49,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 18:18:49,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844226129] [2021-11-02 18:18:49,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:18:49,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:18:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:18:49,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:18:49,762 INFO L87 Difference]: Start difference. First operand 88326 states and 130968 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 18:18:51,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:18:58,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:19:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:19:47,668 INFO L93 Difference]: Finished difference Result 147847 states and 218347 transitions. [2021-11-02 18:19:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:19:47,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 54 [2021-11-02 18:19:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:19:48,500 INFO L225 Difference]: With dead ends: 147847 [2021-11-02 18:19:48,500 INFO L226 Difference]: Without dead ends: 147757 [2021-11-02 18:19:48,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.65ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:19:48,566 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 2958 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50231.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2958 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 6435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.26ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54364.74ms IncrementalHoareTripleChecker+Time [2021-11-02 18:19:48,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2958 Valid, 701 Invalid, 6435 Unknown, 0 Unchecked, 46.26ms Time], IncrementalHoareTripleChecker [1 Valid, 6432 Invalid, 2 Unknown, 0 Unchecked, 54364.74ms Time] [2021-11-02 18:19:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147757 states. [2021-11-02 18:19:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147757 to 147721. [2021-11-02 18:19:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147721 states, 135933 states have (on average 1.338961105838906) internal successors, (182009), 136742 states have internal predecessors, (182009), 8528 states have call successors, (8528), 3248 states have call predecessors, (8528), 3248 states have return successors, (27678), 7866 states have call predecessors, (27678), 8528 states have call successors, (27678) [2021-11-02 18:19:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147721 states to 147721 states and 218215 transitions. [2021-11-02 18:19:53,480 INFO L78 Accepts]: Start accepts. Automaton has 147721 states and 218215 transitions. Word has length 54 [2021-11-02 18:19:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:19:53,480 INFO L470 AbstractCegarLoop]: Abstraction has 147721 states and 218215 transitions. [2021-11-02 18:19:53,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 18:19:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 147721 states and 218215 transitions. [2021-11-02 18:19:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 18:19:53,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:19:53,483 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-11-02 18:19:53,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 18:19:53,484 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION === [usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-02 18:19:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:19:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1034884595, now seen corresponding path program 1 times [2021-11-02 18:19:53,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:19:53,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300382130] [2021-11-02 18:19:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:19:53,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:19:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:19:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:19:53,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:19:53,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300382130] [2021-11-02 18:19:53,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300382130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:19:53,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:19:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:19:53,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721266561] [2021-11-02 18:19:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:19:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:19:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:19:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:19:53,761 INFO L87 Difference]: Start difference. First operand 147721 states and 218215 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 18:19:55,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:20:02,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:20:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:20:58,743 INFO L93 Difference]: Finished difference Result 439507 states and 649052 transitions. [2021-11-02 18:20:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:20:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 55 [2021-11-02 18:20:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:21:00,607 INFO L225 Difference]: With dead ends: 439507 [2021-11-02 18:21:00,608 INFO L226 Difference]: Without dead ends: 291867 [2021-11-02 18:21:01,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.68ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:21:01,686 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 2815 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 6545 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50821.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2815 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 6548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.02ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6545 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55161.80ms IncrementalHoareTripleChecker+Time [2021-11-02 18:21:01,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2815 Valid, 699 Invalid, 6548 Unknown, 0 Unchecked, 44.02ms Time], IncrementalHoareTripleChecker [1 Valid, 6545 Invalid, 2 Unknown, 0 Unchecked, 55161.80ms Time] [2021-11-02 18:21:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291867 states. [2021-11-02 18:21:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291867 to 291545. [2021-11-02 18:21:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291545 states, 268141 states have (on average 1.3388441155958992) internal successors, (358999), 269750 states have internal predecessors, (358999), 16896 states have call successors, (16896), 6496 states have call predecessors, (16896), 6496 states have return successors, (54604), 15570 states have call predecessors, (54604), 16896 states have call successors, (54604) [2021-11-02 18:21:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291545 states to 291545 states and 430499 transitions. [2021-11-02 18:21:12,906 INFO L78 Accepts]: Start accepts. Automaton has 291545 states and 430499 transitions. Word has length 55 [2021-11-02 18:21:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:21:12,907 INFO L470 AbstractCegarLoop]: Abstraction has 291545 states and 430499 transitions. [2021-11-02 18:21:12,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 18:21:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 291545 states and 430499 transitions. [2021-11-02 18:21:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 18:21:12,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:21:12,909 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 18:21:12,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 18:21:12,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === 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 18:21:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:21:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash -404254921, now seen corresponding path program 1 times [2021-11-02 18:21:12,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:21:12,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74878457] [2021-11-02 18:21:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:21:12,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:21:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:21:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 18:21:13,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:21:13,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74878457] [2021-11-02 18:21:13,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74878457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:21:13,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:21:13,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:21:13,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441529434] [2021-11-02 18:21:13,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:21:13,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:21:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:21:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:21:13,604 INFO L87 Difference]: Start difference. First operand 291545 states and 430499 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 18:21:15,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:21:27,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []