/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -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 -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:13:52,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:13:52,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:13:52,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:13:52,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:13:52,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:13:52,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:13:52,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:13:52,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:13:52,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:13:52,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:13:52,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:13:52,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:13:52,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:13:52,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:13:52,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:13:52,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:13:52,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:13:52,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:13:52,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:13:52,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:13:52,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:13:52,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:13:52,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:13:52,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:13:52,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:13:52,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:13:52,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:13:52,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:13:52,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:13:52,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:13:52,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:13:52,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:13:52,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:13:52,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:13:52,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:13:52,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:13:52,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:13:52,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:13:52,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:13:52,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:13:52,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:13:52,361 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:13:52,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:13:52,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:13:52,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:13:52,369 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:13:52,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:13:52,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:13:52,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:13:52,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:13:52,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:13:52,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:13:52,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:13:52,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:13:52,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:13:52,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:13:52,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:13:52,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:13:52,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:13:52,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:13:52,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:13:52,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:13:52,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:13:52,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:13:52,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:13:52,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:13:52,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:13:52,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:13:52,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:13:52,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:13:52,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:13:52,864 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:13:52,865 INFO L432 ainManager$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 [2020-12-22 13:13:52,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673a139c8/957d851ba37d4b50b1fcb9e44b4dcee1/FLAG2c2c10775 [2020-12-22 13:13:54,042 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:13:54,043 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 [2020-12-22 13:13:54,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673a139c8/957d851ba37d4b50b1fcb9e44b4dcee1/FLAG2c2c10775 [2020-12-22 13:13:54,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673a139c8/957d851ba37d4b50b1fcb9e44b4dcee1 [2020-12-22 13:13:54,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:13:54,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:13:54,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:13:54,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:13:54,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:13:54,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:13:54" (1/1) ... [2020-12-22 13:13:54,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5d3b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54, skipping insertion in model container [2020-12-22 13:13:54,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:13:54" (1/1) ... [2020-12-22 13:13:54,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:13:54,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:13:56,112 WARN L226 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] [2020-12-22 13:13:57,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:13:57,817 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:13:57,988 WARN L226 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] [2020-12-22 13:13:58,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:13:59,326 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:13:59,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59 WrapperNode [2020-12-22 13:13:59,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:13:59,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:13:59,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:13:59,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:13:59,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:13:59,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:13:59,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:13:59,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:13:59,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:13:59,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:13:59,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:13:59,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:14:00,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:14:00,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:14:00,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:14:00,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:14:00,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... [2020-12-22 13:14:00,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:14:00,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:14:00,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:14:00,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:14:00,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:14:00,723 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2020-12-22 13:14:00,723 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2020-12-22 13:14:00,723 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-12-22 13:14:00,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-12-22 13:14:00,724 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2020-12-22 13:14:00,724 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2020-12-22 13:14:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2020-12-22 13:14:00,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2020-12-22 13:14:00,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-12-22 13:14:00,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-12-22 13:14:00,727 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2020-12-22 13:14:00,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2020-12-22 13:14:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2020-12-22 13:14:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2020-12-22 13:14:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2020-12-22 13:14:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2020-12-22 13:14:00,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2020-12-22 13:14:00,728 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2020-12-22 13:14:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2020-12-22 13:14:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2020-12-22 13:14:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2020-12-22 13:14:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2020-12-22 13:14:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2020-12-22 13:14:00,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2020-12-22 13:14:00,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:14:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2020-12-22 13:14:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2020-12-22 13:14:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2020-12-22 13:14:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2020-12-22 13:14:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2020-12-22 13:14:00,730 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2020-12-22 13:14:00,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:14:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2020-12-22 13:14:00,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2020-12-22 13:14:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2020-12-22 13:14:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2020-12-22 13:14:00,731 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2020-12-22 13:14:00,731 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2020-12-22 13:14:00,731 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2020-12-22 13:14:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2020-12-22 13:14:00,732 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2020-12-22 13:14:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:14:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:14:00,732 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2020-12-22 13:14:00,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2020-12-22 13:14:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2020-12-22 13:14:00,733 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2020-12-22 13:14:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2020-12-22 13:14:00,733 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2020-12-22 13:14:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2020-12-22 13:14:00,733 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2020-12-22 13:14:00,733 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_bulk_callback [2020-12-22 13:14:00,734 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_bulk_callback [2020-12-22 13:14:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2020-12-22 13:14:00,734 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2020-12-22 13:14:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2020-12-22 13:14:00,734 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2020-12-22 13:14:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2020-12-22 13:14:00,734 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2020-12-22 13:14:00,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:14:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure serial_wait_until_sent [2020-12-22 13:14:00,735 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_wait_until_sent [2020-12-22 13:14:00,735 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2020-12-22 13:14:00,736 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2020-12-22 13:14:00,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_41 [2020-12-22 13:14:00,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_41 [2020-12-22 13:14:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_42 [2020-12-22 13:14:00,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_42 [2020-12-22 13:14:00,737 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2020-12-22 13:14:00,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2020-12-22 13:14:00,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:14:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2020-12-22 13:14:00,739 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2020-12-22 13:14:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2020-12-22 13:14:00,739 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2020-12-22 13:14:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2020-12-22 13:14:00,739 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2020-12-22 13:14:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:14:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:14:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 13:14:00,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put_4 [2020-12-22 13:14:00,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put_4 [2020-12-22 13:14:00,743 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:14:00,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:14:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2020-12-22 13:14:00,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2020-12-22 13:14:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2020-12-22 13:14:00,745 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2020-12-22 13:14:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2020-12-22 13:14:00,745 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2020-12-22 13:14:00,745 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2020-12-22 13:14:00,746 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2020-12-22 13:14:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2020-12-22 13:14:00,746 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2020-12-22 13:14:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2020-12-22 13:14:00,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2020-12-22 13:14:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:14:00,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:14:00,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:14:36,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:14:36,228 INFO L299 CfgBuilder]: Removed 1864 assume(true) statements. [2020-12-22 13:14:36,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:36 BoogieIcfgContainer [2020-12-22 13:14:36,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:14:36,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:14:36,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:14:36,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:14:36,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:13:54" (1/3) ... [2020-12-22 13:14:36,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e860033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:36, skipping insertion in model container [2020-12-22 13:14:36,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:59" (2/3) ... [2020-12-22 13:14:36,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e860033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:36, skipping insertion in model container [2020-12-22 13:14:36,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:36" (3/3) ... [2020-12-22 13:14:36,249 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2020-12-22 13:14:36,258 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:14:36,266 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-12-22 13:14:36,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-12-22 13:14:36,342 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:14:36,343 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:14:36,343 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:14:36,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:14:36,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:14:36,343 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:14:36,344 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:14:36,344 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:14:36,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states. [2020-12-22 13:14:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 13:14:36,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:36,468 INFO L422 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] [2020-12-22 13:14:36,469 INFO L429 AbstractCegarLoop]: === Iteration 1 === [usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~X~$Pointer$~TO~intErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash -235652551, now seen corresponding path program 1 times [2020-12-22 13:14:36,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:36,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558858531] [2020-12-22 13:14:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:14:37,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558858531] [2020-12-22 13:14:37,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:37,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:37,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802978704] [2020-12-22 13:14:37,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:37,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:37,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:37,769 INFO L87 Difference]: Start difference. First operand 2307 states. Second operand 3 states. [2020-12-22 13:14:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:38,059 INFO L93 Difference]: Finished difference Result 4610 states and 6489 transitions. [2020-12-22 13:14:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:38,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-22 13:14:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:38,127 INFO L225 Difference]: With dead ends: 4610 [2020-12-22 13:14:38,127 INFO L226 Difference]: Without dead ends: 2286 [2020-12-22 13:14:38,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2020-12-22 13:14:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2020-12-22 13:14:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2286 states. [2020-12-22 13:14:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3053 transitions. [2020-12-22 13:14:38,410 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3053 transitions. Word has length 36 [2020-12-22 13:14:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:38,411 INFO L481 AbstractCegarLoop]: Abstraction has 2286 states and 3053 transitions. [2020-12-22 13:14:38,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3053 transitions. [2020-12-22 13:14:38,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 13:14:38,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:38,418 INFO L422 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] [2020-12-22 13:14:38,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:14:38,419 INFO L429 AbstractCegarLoop]: === Iteration 2 === [usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~X~$Pointer$~TO~intErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash -836889380, now seen corresponding path program 1 times [2020-12-22 13:14:38,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:38,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517510043] [2020-12-22 13:14:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:14:39,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517510043] [2020-12-22 13:14:39,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:39,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:39,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213171645] [2020-12-22 13:14:39,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:39,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:39,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:39,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:39,159 INFO L87 Difference]: Start difference. First operand 2286 states and 3053 transitions. Second operand 3 states. [2020-12-22 13:14:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:41,611 INFO L93 Difference]: Finished difference Result 6559 states and 8825 transitions. [2020-12-22 13:14:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:41,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 13:14:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:41,653 INFO L225 Difference]: With dead ends: 6559 [2020-12-22 13:14:41,653 INFO L226 Difference]: Without dead ends: 4351 [2020-12-22 13:14:41,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2020-12-22 13:14:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 4339. [2020-12-22 13:14:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4339 states. [2020-12-22 13:14:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5850 transitions. [2020-12-22 13:14:41,901 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5850 transitions. Word has length 37 [2020-12-22 13:14:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:41,903 INFO L481 AbstractCegarLoop]: Abstraction has 4339 states and 5850 transitions. [2020-12-22 13:14:41,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5850 transitions. [2020-12-22 13:14:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 13:14:41,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:41,915 INFO L422 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] [2020-12-22 13:14:41,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:14:41,915 INFO L429 AbstractCegarLoop]: === Iteration 3 === [usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~X~$Pointer$~TO~intErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash -396263666, now seen corresponding path program 1 times [2020-12-22 13:14:41,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:41,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977684956] [2020-12-22 13:14:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:14:42,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977684956] [2020-12-22 13:14:42,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:42,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:42,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292663655] [2020-12-22 13:14:42,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:42,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:42,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:42,497 INFO L87 Difference]: Start difference. First operand 4339 states and 5850 transitions. Second operand 3 states. [2020-12-22 13:14:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:43,358 INFO L93 Difference]: Finished difference Result 12096 states and 16285 transitions. [2020-12-22 13:14:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:43,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-12-22 13:14:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:43,421 INFO L225 Difference]: With dead ends: 12096 [2020-12-22 13:14:43,422 INFO L226 Difference]: Without dead ends: 7835 [2020-12-22 13:14:43,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7835 states. [2020-12-22 13:14:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7835 to 7771. [2020-12-22 13:14:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7771 states. [2020-12-22 13:14:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7771 states to 7771 states and 10458 transitions. [2020-12-22 13:14:43,797 INFO L78 Accepts]: Start accepts. Automaton has 7771 states and 10458 transitions. Word has length 47 [2020-12-22 13:14:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:43,798 INFO L481 AbstractCegarLoop]: Abstraction has 7771 states and 10458 transitions. [2020-12-22 13:14:43,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7771 states and 10458 transitions. [2020-12-22 13:14:43,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 13:14:43,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:43,802 INFO L422 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] [2020-12-22 13:14:43,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:14:43,803 INFO L429 AbstractCegarLoop]: === Iteration 4 === [usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~X~$Pointer$~TO~intErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:43,803 INFO L82 PathProgramCache]: Analyzing trace with hash -978914495, now seen corresponding path program 1 times [2020-12-22 13:14:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:43,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501751450] [2020-12-22 13:14:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:14:45,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501751450] [2020-12-22 13:14:45,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341264026] [2020-12-22 13:14:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 3993 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:14:48,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:14:48,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:48,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:14:48,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901087677] [2020-12-22 13:14:48,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:14:48,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:14:48,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:14:48,881 INFO L87 Difference]: Start difference. First operand 7771 states and 10458 transitions. Second operand 6 states. [2020-12-22 13:14:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:49,252 INFO L93 Difference]: Finished difference Result 15466 states and 20832 transitions. [2020-12-22 13:14:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:14:49,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-12-22 13:14:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:49,466 INFO L225 Difference]: With dead ends: 15466 [2020-12-22 13:14:49,466 INFO L226 Difference]: Without dead ends: 7772 [2020-12-22 13:14:49,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:14:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7772 states. [2020-12-22 13:14:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7772 to 7772. [2020-12-22 13:14:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7772 states. [2020-12-22 13:14:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7772 states to 7772 states and 10459 transitions. [2020-12-22 13:14:50,124 INFO L78 Accepts]: Start accepts. Automaton has 7772 states and 10459 transitions. Word has length 47 [2020-12-22 13:14:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:50,126 INFO L481 AbstractCegarLoop]: Abstraction has 7772 states and 10459 transitions. [2020-12-22 13:14:50,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:14:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 7772 states and 10459 transitions. [2020-12-22 13:14:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 13:14:50,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:50,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:50,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:50,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [usb_serial_device_removeErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_cleanupErr0ASSERT_VIOLATIONERROR_FUNCTION, usb_serial_device_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~X~$Pointer$~TO~intErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash 315434174, now seen corresponding path program 2 times [2020-12-22 13:14:50,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:50,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956653271] [2020-12-22 13:14:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:14:51,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956653271] [2020-12-22 13:14:51,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432151471] [2020-12-22 13:14:51,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true