/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 13:18:53,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 13:18:53,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 13:18:53,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 13:18:53,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 13:18:53,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 13:18:53,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 13:18:53,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 13:18:53,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 13:18:53,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 13:18:53,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 13:18:53,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 13:18:53,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 13:18:53,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 13:18:53,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 13:18:53,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 13:18:53,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 13:18:53,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 13:18:53,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 13:18:53,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 13:18:53,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 13:18:53,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 13:18:53,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 13:18:53,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 13:18:53,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-16 13:18:53,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-16 13:18:53,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-16 13:18:53,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-16 13:18:53,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-16 13:18:53,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-16 13:18:53,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 13:18:53,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 13:18:53,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 13:18:53,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 13:18:53,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 13:18:53,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 13:18:53,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 13:18:53,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 13:18:53,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 13:18:53,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 13:18:53,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 13:18:53,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf [2022-10-16 13:18:53,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 13:18:53,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 13:18:53,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 13:18:53,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 13:18:53,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 13:18:53,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 13:18:53,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 13:18:53,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 13:18:53,697 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 13:18:53,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 13:18:53,698 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 13:18:53,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 13:18:53,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 13:18:53,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 13:18:53,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 13:18:53,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-16 13:18:53,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 13:18:53,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-16 13:18:53,699 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-10-16 13:18:53,700 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 13:18:53,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-16 13:18:53,700 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 13:18:53,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-16 13:18:53,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 13:18:53,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 13:18:53,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 13:18:53,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 13:18:53,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 13:18:53,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 13:18:53,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-16 13:18:53,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 13:18:53,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 13:18:53,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-16 13:18:53,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 13:18:54,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 13:18:54,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 13:18:54,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 13:18:54,090 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 13:18:54,091 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 13:18:54,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-10-16 13:18:54,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d05eac7c/1c376038a70040039f0cb7362abfdb82/FLAG59dd3e586 [2022-10-16 13:18:55,270 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 13:18:55,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-10-16 13:18:55,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d05eac7c/1c376038a70040039f0cb7362abfdb82/FLAG59dd3e586 [2022-10-16 13:18:55,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d05eac7c/1c376038a70040039f0cb7362abfdb82 [2022-10-16 13:18:55,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 13:18:55,641 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 13:18:55,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 13:18:55,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 13:18:55,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 13:18:55,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:18:55" (1/1) ... [2022-10-16 13:18:55,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c425406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:55, skipping insertion in model container [2022-10-16 13:18:55,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:18:55" (1/1) ... [2022-10-16 13:18:55,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 13:18:55,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 13:18:56,404 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-10-16 13:18:56,405 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-10-16 13:18:56,665 WARN L230 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-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-10-16 13:18:57,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 13:18:57,844 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 13:18:57,995 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-10-16 13:18:57,997 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-10-16 13:18:58,006 WARN L230 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-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-10-16 13:18:58,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 13:18:58,458 INFO L208 MainTranslator]: Completed translation [2022-10-16 13:18:58,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58 WrapperNode [2022-10-16 13:18:58,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 13:18:58,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 13:18:58,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 13:18:58,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 13:18:58,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,724 INFO L138 Inliner]: procedures = 202, calls = 1968, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2155 [2022-10-16 13:18:58,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 13:18:58,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 13:18:58,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 13:18:58,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 13:18:58,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,875 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 13:18:58,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 13:18:58,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 13:18:58,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 13:18:58,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (1/1) ... [2022-10-16 13:18:58,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 13:18:58,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:18:58,983 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) [2022-10-16 13:18:58,989 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 [2022-10-16 13:18:59,042 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-10-16 13:18:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-10-16 13:18:59,042 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-10-16 13:18:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-10-16 13:18:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-16 13:18:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-16 13:18:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-16 13:18:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-16 13:18:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-10-16 13:18:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-10-16 13:18:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-16 13:18:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-16 13:18:59,044 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-16 13:18:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-16 13:18:59,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-16 13:18:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-16 13:18:59,044 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2022-10-16 13:18:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2022-10-16 13:18:59,044 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-10-16 13:18:59,045 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-10-16 13:18:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 13:18:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-16 13:18:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-10-16 13:18:59,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-10-16 13:18:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-10-16 13:18:59,045 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-10-16 13:18:59,045 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2022-10-16 13:18:59,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2022-10-16 13:18:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 13:18:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-16 13:18:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-10-16 13:18:59,046 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-10-16 13:18:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-10-16 13:18:59,046 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-10-16 13:18:59,046 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-10-16 13:18:59,047 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-10-16 13:18:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-10-16 13:18:59,047 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-10-16 13:18:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-16 13:18:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-16 13:18:59,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-16 13:18:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2022-10-16 13:18:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2022-10-16 13:18:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2022-10-16 13:18:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2022-10-16 13:18:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-10-16 13:18:59,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-10-16 13:18:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-16 13:18:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2022-10-16 13:18:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2022-10-16 13:18:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2022-10-16 13:18:59,051 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2022-10-16 13:18:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 13:18:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-16 13:18:59,051 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-16 13:18:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2022-10-16 13:18:59,052 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2022-10-16 13:18:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-16 13:18:59,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-16 13:18:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-10-16 13:18:59,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-10-16 13:18:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-16 13:18:59,053 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-16 13:18:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 13:18:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2022-10-16 13:18:59,054 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2022-10-16 13:18:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-16 13:18:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-10-16 13:18:59,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-10-16 13:18:59,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 13:18:59,055 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2022-10-16 13:18:59,056 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2022-10-16 13:18:59,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-16 13:18:59,057 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2022-10-16 13:18:59,057 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2022-10-16 13:18:59,057 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2022-10-16 13:18:59,057 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2022-10-16 13:18:59,057 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-10-16 13:18:59,058 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-10-16 13:18:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 13:18:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 13:18:59,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 13:18:59,642 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 13:18:59,646 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 13:18:59,979 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-16 13:19:05,015 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 13:19:05,029 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 13:19:05,029 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-16 13:19:05,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:19:05 BoogieIcfgContainer [2022-10-16 13:19:05,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 13:19:05,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 13:19:05,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 13:19:05,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 13:19:05,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:18:55" (1/3) ... [2022-10-16 13:19:05,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ca60f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:19:05, skipping insertion in model container [2022-10-16 13:19:05,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:18:58" (2/3) ... [2022-10-16 13:19:05,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ca60f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:19:05, skipping insertion in model container [2022-10-16 13:19:05,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:19:05" (3/3) ... [2022-10-16 13:19:05,043 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-10-16 13:19:05,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 13:19:05,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2022-10-16 13:19:05,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 13:19:05,150 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9d33686, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 13:19:05,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2022-10-16 13:19:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 645 states, 441 states have (on average 1.469387755102041) internal successors, (648), 525 states have internal predecessors, (648), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-10-16 13:19:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 13:19:05,173 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:05,174 INFO L195 NwaCegarLoop]: 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] [2022-10-16 13:19:05,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting hfcsusb_probeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash -282136559, now seen corresponding path program 1 times [2022-10-16 13:19:05,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:05,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943452415] [2022-10-16 13:19:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:05,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:06,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 13:19:06,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943452415] [2022-10-16 13:19:06,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943452415] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:06,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:06,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:19:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496276002] [2022-10-16 13:19:06,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:06,144 INFO L87 Difference]: Start difference. First operand has 645 states, 441 states have (on average 1.469387755102041) internal successors, (648), 525 states have internal predecessors, (648), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 13:19:10,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:10,499 INFO L93 Difference]: Finished difference Result 1384 states and 1845 transitions. [2022-10-16 13:19:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 13:19:10,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-10-16 13:19:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:10,524 INFO L225 Difference]: With dead ends: 1384 [2022-10-16 13:19:10,524 INFO L226 Difference]: Without dead ends: 719 [2022-10-16 13:19:10,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:19:10,538 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 246 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:10,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1596 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 663 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-10-16 13:19:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-10-16 13:19:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 653. [2022-10-16 13:19:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 452 states have (on average 1.4579646017699115) internal successors, (659), 531 states have internal predecessors, (659), 92 states have call successors, (92), 33 states have call predecessors, (92), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-10-16 13:19:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 843 transitions. [2022-10-16 13:19:10,662 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 843 transitions. Word has length 23 [2022-10-16 13:19:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:10,663 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 843 transitions. [2022-10-16 13:19:10,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 13:19:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 843 transitions. [2022-10-16 13:19:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-16 13:19:10,667 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:10,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-10-16 13:19:10,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 13:19:10,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting hfcsusb_probeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1218764271, now seen corresponding path program 1 times [2022-10-16 13:19:10,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:10,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613393099] [2022-10-16 13:19:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:11,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:11,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613393099] [2022-10-16 13:19:11,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613393099] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:11,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:11,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 13:19:11,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326141267] [2022-10-16 13:19:11,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:11,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:11,298 INFO L87 Difference]: Start difference. First operand 653 states and 843 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:15,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:15,458 INFO L93 Difference]: Finished difference Result 1603 states and 2140 transitions. [2022-10-16 13:19:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:19:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-10-16 13:19:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:15,468 INFO L225 Difference]: With dead ends: 1603 [2022-10-16 13:19:15,469 INFO L226 Difference]: Without dead ends: 966 [2022-10-16 13:19:15,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:15,474 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 439 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:15,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1556 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-10-16 13:19:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-10-16 13:19:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 731. [2022-10-16 13:19:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 525 states have (on average 1.4704761904761905) internal successors, (772), 604 states have internal predecessors, (772), 97 states have call successors, (97), 33 states have call predecessors, (97), 33 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-10-16 13:19:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 966 transitions. [2022-10-16 13:19:15,563 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 966 transitions. Word has length 42 [2022-10-16 13:19:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:15,563 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 966 transitions. [2022-10-16 13:19:15,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 966 transitions. [2022-10-16 13:19:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-16 13:19:15,568 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:15,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-10-16 13:19:15,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 13:19:15,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1741904026, now seen corresponding path program 1 times [2022-10-16 13:19:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:15,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605237845] [2022-10-16 13:19:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:15,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:15,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-16 13:19:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:16,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605237845] [2022-10-16 13:19:16,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605237845] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:16,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:16,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:19:16,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666845890] [2022-10-16 13:19:16,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:16,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 13:19:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 13:19:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:19:16,018 INFO L87 Difference]: Start difference. First operand 731 states and 966 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:19:20,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:22,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:24,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:24,774 INFO L93 Difference]: Finished difference Result 1578 states and 2131 transitions. [2022-10-16 13:19:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 13:19:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-10-16 13:19:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:24,787 INFO L225 Difference]: With dead ends: 1578 [2022-10-16 13:19:24,788 INFO L226 Difference]: Without dead ends: 1574 [2022-10-16 13:19:24,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 13:19:24,790 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 1168 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 267 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:24,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 1895 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1209 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-10-16 13:19:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-10-16 13:19:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1370. [2022-10-16 13:19:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1038 states have (on average 1.4710982658959537) internal successors, (1527), 1121 states have internal predecessors, (1527), 192 states have call successors, (192), 64 states have call predecessors, (192), 64 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2022-10-16 13:19:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1911 transitions. [2022-10-16 13:19:24,884 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1911 transitions. Word has length 44 [2022-10-16 13:19:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:24,885 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1911 transitions. [2022-10-16 13:19:24,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:19:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1911 transitions. [2022-10-16 13:19:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 13:19:24,887 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:24,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-10-16 13:19:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 13:19:24,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting hfcsusb_probeErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302513, now seen corresponding path program 1 times [2022-10-16 13:19:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:24,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354829211] [2022-10-16 13:19:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:24,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:25,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:25,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:25,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354829211] [2022-10-16 13:19:25,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354829211] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:25,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:25,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:19:25,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000065541] [2022-10-16 13:19:25,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:25,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:25,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:25,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:25,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:25,247 INFO L87 Difference]: Start difference. First operand 1370 states and 1911 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:29,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:29,536 INFO L93 Difference]: Finished difference Result 2870 states and 4053 transitions. [2022-10-16 13:19:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:19:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-10-16 13:19:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:29,547 INFO L225 Difference]: With dead ends: 2870 [2022-10-16 13:19:29,548 INFO L226 Difference]: Without dead ends: 1516 [2022-10-16 13:19:29,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:29,556 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 205 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 99 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:29,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1568 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 655 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-10-16 13:19:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-10-16 13:19:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1390. [2022-10-16 13:19:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1058 states have (on average 1.4716446124763705) internal successors, (1557), 1141 states have internal predecessors, (1557), 192 states have call successors, (192), 64 states have call predecessors, (192), 64 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2022-10-16 13:19:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1941 transitions. [2022-10-16 13:19:29,715 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1941 transitions. Word has length 45 [2022-10-16 13:19:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:29,718 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1941 transitions. [2022-10-16 13:19:29,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1941 transitions. [2022-10-16 13:19:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-16 13:19:29,728 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:29,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-10-16 13:19:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 13:19:29,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting set_led_bitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1442272195, now seen corresponding path program 1 times [2022-10-16 13:19:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:29,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689522196] [2022-10-16 13:19:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:29,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:30,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:30,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 13:19:30,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:30,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689522196] [2022-10-16 13:19:30,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689522196] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:30,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:30,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:19:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299366571] [2022-10-16 13:19:30,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:30,161 INFO L87 Difference]: Start difference. First operand 1390 states and 1941 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 13:19:33,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:34,611 INFO L93 Difference]: Finished difference Result 2904 states and 4047 transitions. [2022-10-16 13:19:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 13:19:34,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-10-16 13:19:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:34,623 INFO L225 Difference]: With dead ends: 2904 [2022-10-16 13:19:34,623 INFO L226 Difference]: Without dead ends: 1530 [2022-10-16 13:19:34,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:19:34,631 INFO L413 NwaCegarLoop]: 925 mSDtfsCounter, 765 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 143 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:34,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 1403 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 698 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-10-16 13:19:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-10-16 13:19:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1420. [2022-10-16 13:19:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1077 states have (on average 1.4512534818941505) internal successors, (1563), 1158 states have internal predecessors, (1563), 194 states have call successors, (194), 73 states have call predecessors, (194), 73 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-10-16 13:19:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1951 transitions. [2022-10-16 13:19:34,716 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1951 transitions. Word has length 46 [2022-10-16 13:19:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:34,717 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1951 transitions. [2022-10-16 13:19:34,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 13:19:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1951 transitions. [2022-10-16 13:19:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-16 13:19:34,719 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:34,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-16 13:19:34,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 13:19:34,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting hfcsusb_probeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1912742190, now seen corresponding path program 1 times [2022-10-16 13:19:34,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:34,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807535053] [2022-10-16 13:19:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:35,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:35,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807535053] [2022-10-16 13:19:35,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807535053] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:19:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897958930] [2022-10-16 13:19:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:35,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:19:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:19:35,215 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) [2022-10-16 13:19:35,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 13:19:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:35,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:19:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:19:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:35,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:19:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:35,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897958930] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:19:35,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:19:35,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-10-16 13:19:35,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45957920] [2022-10-16 13:19:35,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:19:35,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 13:19:35,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 13:19:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:19:35,914 INFO L87 Difference]: Start difference. First operand 1420 states and 1951 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:40,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:43,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:43,577 INFO L93 Difference]: Finished difference Result 4062 states and 5844 transitions. [2022-10-16 13:19:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 13:19:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-10-16 13:19:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:43,602 INFO L225 Difference]: With dead ends: 4062 [2022-10-16 13:19:43,602 INFO L226 Difference]: Without dead ends: 2671 [2022-10-16 13:19:43,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:19:43,613 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 1665 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 405 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 2442 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:43,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1889 Valid, 2442 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1120 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-10-16 13:19:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2022-10-16 13:19:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1499. [2022-10-16 13:19:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1159 states have (on average 1.452113891285591) internal successors, (1683), 1237 states have internal predecessors, (1683), 194 states have call successors, (194), 73 states have call predecessors, (194), 73 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-10-16 13:19:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2071 transitions. [2022-10-16 13:19:43,759 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2071 transitions. Word has length 49 [2022-10-16 13:19:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:43,760 INFO L495 AbstractCegarLoop]: Abstraction has 1499 states and 2071 transitions. [2022-10-16 13:19:43,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2071 transitions. [2022-10-16 13:19:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-16 13:19:43,762 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:43,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-16 13:19:43,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 13:19:43,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-16 13:19:43,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting hfcsusb_probeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash -834533722, now seen corresponding path program 1 times [2022-10-16 13:19:43,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:43,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025329514] [2022-10-16 13:19:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:43,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:44,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:44,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:44,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025329514] [2022-10-16 13:19:44,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025329514] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:19:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126023290] [2022-10-16 13:19:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:44,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:19:44,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:19:44,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:19:44,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 13:19:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2760 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:19:44,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:19:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:19:45,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 13:19:45,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126023290] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:45,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 13:19:45,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-16 13:19:45,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210406807] [2022-10-16 13:19:45,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:45,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:45,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:19:45,004 INFO L87 Difference]: Start difference. First operand 1499 states and 2071 transitions. Second operand has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:45,569 INFO L93 Difference]: Finished difference Result 1765 states and 2443 transitions. [2022-10-16 13:19:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:19:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-10-16 13:19:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:45,581 INFO L225 Difference]: With dead ends: 1765 [2022-10-16 13:19:45,581 INFO L226 Difference]: Without dead ends: 1761 [2022-10-16 13:19:45,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:19:45,583 INFO L413 NwaCegarLoop]: 1069 mSDtfsCounter, 514 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:45,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1819 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 13:19:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-10-16 13:19:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1365. [2022-10-16 13:19:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1039 states have (on average 1.4196342637151107) internal successors, (1475), 1113 states have internal predecessors, (1475), 184 states have call successors, (184), 73 states have call predecessors, (184), 73 states have return successors, (184), 184 states have call predecessors, (184), 184 states have call successors, (184) [2022-10-16 13:19:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1843 transitions. [2022-10-16 13:19:45,679 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1843 transitions. Word has length 50 [2022-10-16 13:19:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:45,680 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 1843 transitions. [2022-10-16 13:19:45,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1843 transitions. [2022-10-16 13:19:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-16 13:19:45,681 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:45,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2022-10-16 13:19:45,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 13:19:45,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-16 13:19:45,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting hfcsusb_probeErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:45,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash -416240940, now seen corresponding path program 1 times [2022-10-16 13:19:45,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:45,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993794184] [2022-10-16 13:19:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:45,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:46,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:19:46,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:46,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993794184] [2022-10-16 13:19:46,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993794184] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:46,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:46,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 13:19:46,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071512798] [2022-10-16 13:19:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:46,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:46,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:46,261 INFO L87 Difference]: Start difference. First operand 1365 states and 1843 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:50,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:50,440 INFO L93 Difference]: Finished difference Result 1933 states and 2729 transitions. [2022-10-16 13:19:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:19:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-10-16 13:19:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:50,454 INFO L225 Difference]: With dead ends: 1933 [2022-10-16 13:19:50,454 INFO L226 Difference]: Without dead ends: 1931 [2022-10-16 13:19:50,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:50,457 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 440 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 139 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:50,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1583 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 702 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-10-16 13:19:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-10-16 13:19:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1483. [2022-10-16 13:19:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1153 states have (on average 1.430182133564614) internal successors, (1649), 1227 states have internal predecessors, (1649), 188 states have call successors, (188), 73 states have call predecessors, (188), 73 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-10-16 13:19:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 2025 transitions. [2022-10-16 13:19:50,612 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 2025 transitions. Word has length 52 [2022-10-16 13:19:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:50,614 INFO L495 AbstractCegarLoop]: Abstraction has 1483 states and 2025 transitions. [2022-10-16 13:19:50,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 2025 transitions. [2022-10-16 13:19:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-16 13:19:50,616 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:50,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-16 13:19:50,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-16 13:19:50,619 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting hfcsusb_probeErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -195996309, now seen corresponding path program 1 times [2022-10-16 13:19:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:50,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762557941] [2022-10-16 13:19:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:50,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:50,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:19:50,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:50,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762557941] [2022-10-16 13:19:50,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762557941] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:19:50,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166018119] [2022-10-16 13:19:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:50,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:19:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:19:50,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:19:51,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 13:19:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:51,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:19:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:19:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:19:51,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:19:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:19:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166018119] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:19:51,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:19:51,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-10-16 13:19:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158535440] [2022-10-16 13:19:51,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:19:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 13:19:51,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 13:19:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:19:51,659 INFO L87 Difference]: Start difference. First operand 1483 states and 2025 transitions. Second operand has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:56,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:57,032 INFO L93 Difference]: Finished difference Result 3328 states and 4887 transitions. [2022-10-16 13:19:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 13:19:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 59 [2022-10-16 13:19:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:57,056 INFO L225 Difference]: With dead ends: 3328 [2022-10-16 13:19:57,056 INFO L226 Difference]: Without dead ends: 3327 [2022-10-16 13:19:57,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:19:57,059 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 1669 mSDsluCounter, 2366 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 311 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:57,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1903 Valid, 3287 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1614 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-10-16 13:19:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2022-10-16 13:19:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 1835. [2022-10-16 13:19:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1493 states have (on average 1.4554588077695914) internal successors, (2173), 1567 states have internal predecessors, (2173), 200 states have call successors, (200), 73 states have call predecessors, (200), 73 states have return successors, (200), 200 states have call predecessors, (200), 200 states have call successors, (200) [2022-10-16 13:19:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2573 transitions. [2022-10-16 13:19:57,219 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2573 transitions. Word has length 59 [2022-10-16 13:19:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:57,220 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 2573 transitions. [2022-10-16 13:19:57,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2573 transitions. [2022-10-16 13:19:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-16 13:19:57,222 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:57,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-16 13:19:57,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 13:19:57,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:19:57,436 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting hfcsusb_probeErr15ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:57,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1780917577, now seen corresponding path program 1 times [2022-10-16 13:19:57,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:57,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508406396] [2022-10-16 13:19:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:57,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:57,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:19:57,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:57,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508406396] [2022-10-16 13:19:57,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508406396] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:19:57,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909711709] [2022-10-16 13:19:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:57,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:19:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:19:57,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:19:57,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 13:19:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:58,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2794 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:19:58,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:19:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:19:58,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 13:19:58,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909711709] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:58,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 13:19:58,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-16 13:19:58,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566593234] [2022-10-16 13:19:58,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:58,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:19:58,424 INFO L87 Difference]: Start difference. First operand 1835 states and 2573 transitions. Second operand has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:58,708 INFO L93 Difference]: Finished difference Result 2187 states and 3079 transitions. [2022-10-16 13:19:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:19:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-10-16 13:19:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:58,725 INFO L225 Difference]: With dead ends: 2187 [2022-10-16 13:19:58,725 INFO L226 Difference]: Without dead ends: 2186 [2022-10-16 13:19:58,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:19:58,729 INFO L413 NwaCegarLoop]: 1129 mSDtfsCounter, 492 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:58,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1929 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 13:19:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-10-16 13:19:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1834. [2022-10-16 13:19:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1493 states have (on average 1.4514400535833891) internal successors, (2167), 1566 states have internal predecessors, (2167), 200 states have call successors, (200), 73 states have call predecessors, (200), 73 states have return successors, (200), 200 states have call predecessors, (200), 200 states have call successors, (200) [2022-10-16 13:19:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2567 transitions. [2022-10-16 13:19:58,875 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2567 transitions. Word has length 60 [2022-10-16 13:19:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:58,875 INFO L495 AbstractCegarLoop]: Abstraction has 1834 states and 2567 transitions. [2022-10-16 13:19:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2567 transitions. [2022-10-16 13:19:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-16 13:19:58,877 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:58,877 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-16 13:19:58,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 13:19:59,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:19:59,091 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:19:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1576835012, now seen corresponding path program 1 times [2022-10-16 13:19:59,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:59,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255677957] [2022-10-16 13:19:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:59,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-16 13:19:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-16 13:19:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-16 13:19:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255677957] [2022-10-16 13:19:59,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255677957] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:59,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:59,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 13:19:59,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675065868] [2022-10-16 13:19:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:59,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 13:19:59,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 13:19:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:19:59,430 INFO L87 Difference]: Start difference. First operand 1834 states and 2567 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 13:20:03,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:05,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:06,347 INFO L93 Difference]: Finished difference Result 3013 states and 4203 transitions. [2022-10-16 13:20:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 13:20:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-10-16 13:20:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:06,360 INFO L225 Difference]: With dead ends: 3013 [2022-10-16 13:20:06,360 INFO L226 Difference]: Without dead ends: 1936 [2022-10-16 13:20:06,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-16 13:20:06,365 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 665 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 177 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:06,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1796 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 970 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-10-16 13:20:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2022-10-16 13:20:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1821. [2022-10-16 13:20:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1480 states have (on average 1.45) internal successors, (2146), 1553 states have internal predecessors, (2146), 200 states have call successors, (200), 73 states have call predecessors, (200), 73 states have return successors, (200), 200 states have call predecessors, (200), 200 states have call successors, (200) [2022-10-16 13:20:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2546 transitions. [2022-10-16 13:20:06,497 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2546 transitions. Word has length 61 [2022-10-16 13:20:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:06,497 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 2546 transitions. [2022-10-16 13:20:06,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 13:20:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2546 transitions. [2022-10-16 13:20:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-16 13:20:06,499 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:06,499 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-10-16 13:20:06,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 13:20:06,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting set_led_bitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:20:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1159804697, now seen corresponding path program 1 times [2022-10-16 13:20:06,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:06,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910252275] [2022-10-16 13:20:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:06,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:06,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:07,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:07,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-16 13:20:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-16 13:20:07,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910252275] [2022-10-16 13:20:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910252275] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:07,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:07,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 13:20:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555743578] [2022-10-16 13:20:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:07,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 13:20:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 13:20:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 13:20:07,055 INFO L87 Difference]: Start difference. First operand 1821 states and 2546 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:11,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:12,259 INFO L93 Difference]: Finished difference Result 2971 states and 4150 transitions. [2022-10-16 13:20:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-16 13:20:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2022-10-16 13:20:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:12,273 INFO L225 Difference]: With dead ends: 2971 [2022-10-16 13:20:12,273 INFO L226 Difference]: Without dead ends: 1907 [2022-10-16 13:20:12,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 13:20:12,278 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 450 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 270 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:12,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 2529 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1337 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-10-16 13:20:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-10-16 13:20:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1801. [2022-10-16 13:20:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1470 states have (on average 1.448299319727891) internal successors, (2129), 1543 states have internal predecessors, (2129), 190 states have call successors, (190), 73 states have call predecessors, (190), 73 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-10-16 13:20:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2509 transitions. [2022-10-16 13:20:12,403 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2509 transitions. Word has length 63 [2022-10-16 13:20:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:12,404 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 2509 transitions. [2022-10-16 13:20:12,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2509 transitions. [2022-10-16 13:20:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-16 13:20:12,405 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:12,405 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-10-16 13:20:12,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 13:20:12,406 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting set_led_bitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:20:12,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:12,406 INFO L85 PathProgramCache]: Analyzing trace with hash 824170314, now seen corresponding path program 1 times [2022-10-16 13:20:12,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:12,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801553424] [2022-10-16 13:20:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:12,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:12,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:12,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-16 13:20:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-16 13:20:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801553424] [2022-10-16 13:20:12,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801553424] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:12,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:12,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 13:20:12,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023550024] [2022-10-16 13:20:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 13:20:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 13:20:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:20:12,768 INFO L87 Difference]: Start difference. First operand 1801 states and 2509 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:17,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:17,812 INFO L93 Difference]: Finished difference Result 3698 states and 5224 transitions. [2022-10-16 13:20:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 13:20:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-10-16 13:20:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:17,824 INFO L225 Difference]: With dead ends: 3698 [2022-10-16 13:20:17,825 INFO L226 Difference]: Without dead ends: 1926 [2022-10-16 13:20:17,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-16 13:20:17,833 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 231 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:17,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2280 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1342 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-10-16 13:20:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2022-10-16 13:20:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1814. [2022-10-16 13:20:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1481 states have (on average 1.4469952734638758) internal successors, (2143), 1554 states have internal predecessors, (2143), 190 states have call successors, (190), 75 states have call predecessors, (190), 75 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-10-16 13:20:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2523 transitions. [2022-10-16 13:20:17,969 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2523 transitions. Word has length 64 [2022-10-16 13:20:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:17,969 INFO L495 AbstractCegarLoop]: Abstraction has 1814 states and 2523 transitions. [2022-10-16 13:20:17,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2523 transitions. [2022-10-16 13:20:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-16 13:20:17,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:17,971 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-10-16 13:20:17,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-16 13:20:17,972 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting set_led_bitErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:20:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 824755210, now seen corresponding path program 1 times [2022-10-16 13:20:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:17,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985131499] [2022-10-16 13:20:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:18,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:18,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-16 13:20:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:20:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985131499] [2022-10-16 13:20:18,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985131499] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:18,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:18,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 13:20:18,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089104620] [2022-10-16 13:20:18,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:18,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 13:20:18,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 13:20:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 13:20:18,398 INFO L87 Difference]: Start difference. First operand 1814 states and 2523 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:22,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:24,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:27,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:30,363 INFO L93 Difference]: Finished difference Result 4550 states and 6387 transitions. [2022-10-16 13:20:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 13:20:30,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-10-16 13:20:30,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:30,389 INFO L225 Difference]: With dead ends: 4550 [2022-10-16 13:20:30,389 INFO L226 Difference]: Without dead ends: 3500 [2022-10-16 13:20:30,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-10-16 13:20:30,396 INFO L413 NwaCegarLoop]: 1315 mSDtfsCounter, 764 mSDsluCounter, 3277 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 152 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 4592 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:30,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 4592 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2534 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2022-10-16 13:20:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2022-10-16 13:20:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1822. [2022-10-16 13:20:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1487 states have (on average 1.445191661062542) internal successors, (2149), 1560 states have internal predecessors, (2149), 190 states have call successors, (190), 75 states have call predecessors, (190), 77 states have return successors, (192), 192 states have call predecessors, (192), 190 states have call successors, (192) [2022-10-16 13:20:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2531 transitions. [2022-10-16 13:20:30,641 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2531 transitions. Word has length 64 [2022-10-16 13:20:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:30,641 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2531 transitions. [2022-10-16 13:20:30,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2531 transitions. [2022-10-16 13:20:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-16 13:20:30,644 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:30,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 13:20:30,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-16 13:20:30,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting hfcsusb_probeErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:20:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:30,645 INFO L85 PathProgramCache]: Analyzing trace with hash -66497982, now seen corresponding path program 1 times [2022-10-16 13:20:30,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:30,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885589108] [2022-10-16 13:20:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:30,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:30,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:30,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-10-16 13:20:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:30,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-16 13:20:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:30,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:30,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885589108] [2022-10-16 13:20:30,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885589108] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:30,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:30,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:20:30,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667159058] [2022-10-16 13:20:30,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:30,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:30,935 INFO L87 Difference]: Start difference. First operand 1822 states and 2531 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 13:20:33,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:35,398 INFO L93 Difference]: Finished difference Result 4312 states and 6140 transitions. [2022-10-16 13:20:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:20:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-10-16 13:20:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:35,423 INFO L225 Difference]: With dead ends: 4312 [2022-10-16 13:20:35,423 INFO L226 Difference]: Without dead ends: 2519 [2022-10-16 13:20:35,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:35,440 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 272 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1545 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 661 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-10-16 13:20:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2022-10-16 13:20:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2406. [2022-10-16 13:20:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2051 states have (on average 1.469039492930278) internal successors, (3013), 2124 states have internal predecessors, (3013), 210 states have call successors, (210), 75 states have call predecessors, (210), 77 states have return successors, (212), 212 states have call predecessors, (212), 210 states have call successors, (212) [2022-10-16 13:20:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3435 transitions. [2022-10-16 13:20:35,765 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3435 transitions. Word has length 65 [2022-10-16 13:20:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:35,765 INFO L495 AbstractCegarLoop]: Abstraction has 2406 states and 3435 transitions. [2022-10-16 13:20:35,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 13:20:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3435 transitions. [2022-10-16 13:20:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-16 13:20:35,766 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:35,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 13:20:35,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-16 13:20:35,767 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting hfcsusb_probeErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:20:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1241322286, now seen corresponding path program 1 times [2022-10-16 13:20:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:35,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228715011] [2022-10-16 13:20:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:36,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:36,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:36,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-10-16 13:20:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:36,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:36,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228715011] [2022-10-16 13:20:36,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228715011] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:36,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:36,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 13:20:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835676698] [2022-10-16 13:20:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 13:20:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 13:20:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 13:20:36,709 INFO L87 Difference]: Start difference. First operand 2406 states and 3435 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:20:40,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:42,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:44,809 INFO L93 Difference]: Finished difference Result 4948 states and 7142 transitions. [2022-10-16 13:20:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 13:20:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-10-16 13:20:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:44,821 INFO L225 Difference]: With dead ends: 4948 [2022-10-16 13:20:44,821 INFO L226 Difference]: Without dead ends: 2559 [2022-10-16 13:20:44,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-10-16 13:20:44,833 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 677 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 223 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:44,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 2649 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1491 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-10-16 13:20:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-10-16 13:20:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2368. [2022-10-16 13:20:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2033 states have (on average 1.4633546483030004) internal successors, (2975), 2106 states have internal predecessors, (2975), 190 states have call successors, (190), 75 states have call predecessors, (190), 77 states have return successors, (192), 192 states have call predecessors, (192), 190 states have call successors, (192) [2022-10-16 13:20:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 3357 transitions. [2022-10-16 13:20:45,029 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 3357 transitions. Word has length 65 [2022-10-16 13:20:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:45,029 INFO L495 AbstractCegarLoop]: Abstraction has 2368 states and 3357 transitions. [2022-10-16 13:20:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:20:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 3357 transitions. [2022-10-16 13:20:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-16 13:20:45,031 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:45,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 13:20:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-16 13:20:45,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting hfcsusb_probeErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:20:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash -171630107, now seen corresponding path program 1 times [2022-10-16 13:20:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:45,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232418986] [2022-10-16 13:20:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:46,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-10-16 13:20:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:46,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232418986] [2022-10-16 13:20:46,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232418986] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:20:46,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336722699] [2022-10-16 13:20:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:46,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:20:46,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:20:46,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 13:20:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2948 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 13:20:46,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:20:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:47,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:20:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:47,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336722699] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-16 13:20:47,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-16 13:20:47,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 9 [2022-10-16 13:20:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48401208] [2022-10-16 13:20:47,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-16 13:20:47,114 INFO L87 Difference]: Start difference. First operand 2368 states and 3357 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:47,599 INFO L93 Difference]: Finished difference Result 4709 states and 6706 transitions. [2022-10-16 13:20:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:20:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-10-16 13:20:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:47,609 INFO L225 Difference]: With dead ends: 4709 [2022-10-16 13:20:47,609 INFO L226 Difference]: Without dead ends: 2370 [2022-10-16 13:20:47,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-16 13:20:47,619 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 4 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:47,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2386 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 13:20:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-10-16 13:20:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2370. [2022-10-16 13:20:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2035 states have (on average 1.462899262899263) internal successors, (2977), 2108 states have internal predecessors, (2977), 190 states have call successors, (190), 75 states have call predecessors, (190), 77 states have return successors, (192), 192 states have call predecessors, (192), 190 states have call successors, (192) [2022-10-16 13:20:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 3359 transitions. [2022-10-16 13:20:47,888 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 3359 transitions. Word has length 66 [2022-10-16 13:20:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:47,889 INFO L495 AbstractCegarLoop]: Abstraction has 2370 states and 3359 transitions. [2022-10-16 13:20:47,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:20:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 3359 transitions. [2022-10-16 13:20:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-16 13:20:47,890 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:47,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 13:20:47,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 13:20:48,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 13:20:48,104 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting hfcsusb_probeErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:20:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1455900368, now seen corresponding path program 1 times [2022-10-16 13:20:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:48,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390261951] [2022-10-16 13:20:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:49,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:49,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:49,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-10-16 13:20:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:49,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390261951] [2022-10-16 13:20:49,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390261951] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:20:49,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493417735] [2022-10-16 13:20:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:49,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:20:49,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:20:49,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 13:20:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2967 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 13:20:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:20:49,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:20:50,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:20:50,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 13:20:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:50,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:20:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:50,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493417735] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:20:50,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:20:50,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 18 [2022-10-16 13:20:50,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228312108] [2022-10-16 13:20:50,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:20:50,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 13:20:50,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:50,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 13:20:50,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-10-16 13:20:50,583 INFO L87 Difference]: Start difference. First operand 2370 states and 3359 transitions. Second operand has 18 states, 18 states have (on average 8.166666666666666) internal successors, (147), 16 states have internal predecessors, (147), 5 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 13:20:55,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:57,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:59,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:01,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:05,940 INFO L93 Difference]: Finished difference Result 5087 states and 7251 transitions. [2022-10-16 13:21:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-16 13:21:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.166666666666666) internal successors, (147), 16 states have internal predecessors, (147), 5 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 67 [2022-10-16 13:21:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:05,949 INFO L225 Difference]: With dead ends: 5087 [2022-10-16 13:21:05,949 INFO L226 Difference]: Without dead ends: 2738 [2022-10-16 13:21:05,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-10-16 13:21:05,960 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 1090 mSDsluCounter, 4390 mSDsCounter, 0 mSdLazyCounter, 4024 mSolverCounterSat, 274 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 5135 SdHoareTripleChecker+Invalid, 4302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 4024 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:05,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 5135 Invalid, 4302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 4024 Invalid, 4 Unknown, 0 Unchecked, 14.7s Time] [2022-10-16 13:21:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-10-16 13:21:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2563. [2022-10-16 13:21:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2221 states have (on average 1.4533993696533094) internal successors, (3228), 2296 states have internal predecessors, (3228), 192 states have call successors, (192), 77 states have call predecessors, (192), 82 states have return successors, (200), 195 states have call predecessors, (200), 192 states have call successors, (200) [2022-10-16 13:21:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3620 transitions. [2022-10-16 13:21:06,193 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3620 transitions. Word has length 67 [2022-10-16 13:21:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:06,193 INFO L495 AbstractCegarLoop]: Abstraction has 2563 states and 3620 transitions. [2022-10-16 13:21:06,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.166666666666666) internal successors, (147), 16 states have internal predecessors, (147), 5 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 13:21:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3620 transitions. [2022-10-16 13:21:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-16 13:21:06,196 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:06,196 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 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] [2022-10-16 13:21:06,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 13:21:06,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 13:21:06,412 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting hfcsusb_probeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:21:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash -551797713, now seen corresponding path program 2 times [2022-10-16 13:21:06,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:06,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632040229] [2022-10-16 13:21:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:06,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:06,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:06,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:21:07,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632040229] [2022-10-16 13:21:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632040229] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850922486] [2022-10-16 13:21:07,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 13:21:07,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:07,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:21:07,007 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:21:07,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 13:21:07,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 13:21:07,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 13:21:07,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2816 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 13:21:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:21:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:21:07,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:21:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 13:21:07,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850922486] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:21:07,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:21:07,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-10-16 13:21:07,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844186143] [2022-10-16 13:21:07,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:21:07,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 13:21:07,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 13:21:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-16 13:21:07,807 INFO L87 Difference]: Start difference. First operand 2563 states and 3620 transitions. Second operand has 14 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:21:13,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:16,120 INFO L93 Difference]: Finished difference Result 12276 states and 18172 transitions. [2022-10-16 13:21:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 13:21:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2022-10-16 13:21:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:16,157 INFO L225 Difference]: With dead ends: 12276 [2022-10-16 13:21:16,157 INFO L226 Difference]: Without dead ends: 9897 [2022-10-16 13:21:16,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-16 13:21:16,170 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 3117 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 703 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 4043 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:16,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 4043 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2117 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-10-16 13:21:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2022-10-16 13:21:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 3175. [2022-10-16 13:21:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 2833 states have (on average 1.4359336392516766) internal successors, (4068), 2908 states have internal predecessors, (4068), 192 states have call successors, (192), 77 states have call predecessors, (192), 82 states have return successors, (200), 195 states have call predecessors, (200), 192 states have call successors, (200) [2022-10-16 13:21:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4460 transitions. [2022-10-16 13:21:16,713 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4460 transitions. Word has length 70 [2022-10-16 13:21:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:16,714 INFO L495 AbstractCegarLoop]: Abstraction has 3175 states and 4460 transitions. [2022-10-16 13:21:16,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:21:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4460 transitions. [2022-10-16 13:21:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-16 13:21:16,719 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:16,719 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-10-16 13:21:16,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 13:21:16,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:16,933 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting hfcsusb_probeErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:21:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1387567106, now seen corresponding path program 1 times [2022-10-16 13:21:16,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:16,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610720766] [2022-10-16 13:21:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:16,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:17,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:17,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:17,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-10-16 13:21:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-16 13:21:18,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:18,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610720766] [2022-10-16 13:21:18,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610720766] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:18,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163776366] [2022-10-16 13:21:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:18,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:21:18,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:21:18,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 13:21:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-16 13:21:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:21:18,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:21:19,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:21:19,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 13:21:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-16 13:21:19,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:21:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-16 13:21:19,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163776366] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:21:19,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:21:19,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2022-10-16 13:21:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170397116] [2022-10-16 13:21:19,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:21:19,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-16 13:21:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-16 13:21:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-10-16 13:21:19,783 INFO L87 Difference]: Start difference. First operand 3175 states and 4460 transitions. Second operand has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 19 states have internal predecessors, (163), 5 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 13:21:27,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:29,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:31,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:33,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:35,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:37,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:39,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:41,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:43,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:49,129 INFO L93 Difference]: Finished difference Result 6489 states and 9170 transitions. [2022-10-16 13:21:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 13:21:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 19 states have internal predecessors, (163), 5 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 75 [2022-10-16 13:21:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:49,141 INFO L225 Difference]: With dead ends: 6489 [2022-10-16 13:21:49,142 INFO L226 Difference]: Without dead ends: 3352 [2022-10-16 13:21:49,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 13:21:49,155 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 959 mSDsluCounter, 5869 mSDsCounter, 0 mSdLazyCounter, 5449 mSolverCounterSat, 261 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 6628 SdHoareTripleChecker+Invalid, 5719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 5449 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.6s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:49,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1019 Valid, 6628 Invalid, 5719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 5449 Invalid, 9 Unknown, 0 Unchecked, 28.6s Time] [2022-10-16 13:21:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2022-10-16 13:21:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 3177. [2022-10-16 13:21:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 2835 states have (on average 1.434920634920635) internal successors, (4068), 2910 states have internal predecessors, (4068), 192 states have call successors, (192), 77 states have call predecessors, (192), 82 states have return successors, (200), 195 states have call predecessors, (200), 192 states have call successors, (200) [2022-10-16 13:21:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4460 transitions. [2022-10-16 13:21:49,571 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4460 transitions. Word has length 75 [2022-10-16 13:21:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:49,572 INFO L495 AbstractCegarLoop]: Abstraction has 3177 states and 4460 transitions. [2022-10-16 13:21:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 19 states have internal predecessors, (163), 5 states have call successors, (12), 8 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 13:21:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4460 transitions. [2022-10-16 13:21:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-16 13:21:49,574 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:49,574 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-10-16 13:21:49,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 13:21:49,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:49,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting hfcsusb_probeErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:21:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash 585475184, now seen corresponding path program 2 times [2022-10-16 13:21:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:49,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517459791] [2022-10-16 13:21:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:50,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:50,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-10-16 13:21:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-10-16 13:21:51,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517459791] [2022-10-16 13:21:51,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517459791] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552802756] [2022-10-16 13:21:51,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 13:21:51,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:51,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:21:51,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:21:51,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 13:21:52,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 13:21:52,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 13:21:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 3247 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 13:21:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:21:52,127 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 13:21:52,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 13:21:52,257 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 13:21:52,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 13:21:53,027 INFO L356 Elim1Store]: treesize reduction 3, result has 89.7 percent of original size [2022-10-16 13:21:53,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 60 [2022-10-16 13:21:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-16 13:21:53,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:21:54,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552802756] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:54,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 13:21:54,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-10-16 13:21:54,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759134341] [2022-10-16 13:21:54,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 13:21:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 13:21:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 13:21:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-10-16 13:21:54,048 INFO L87 Difference]: Start difference. First operand 3177 states and 4460 transitions. Second operand has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 16 states have internal predecessors, (122), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 13:22:03,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:05,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:06,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:08,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:10,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:12,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:14,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:22:20,831 INFO L93 Difference]: Finished difference Result 6582 states and 9330 transitions. [2022-10-16 13:22:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-16 13:22:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 16 states have internal predecessors, (122), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 83 [2022-10-16 13:22:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:22:20,841 INFO L225 Difference]: With dead ends: 6582 [2022-10-16 13:22:20,842 INFO L226 Difference]: Without dead ends: 3443 [2022-10-16 13:22:20,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2022-10-16 13:22:20,853 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 828 mSDsluCounter, 6238 mSDsCounter, 0 mSdLazyCounter, 5846 mSolverCounterSat, 257 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 7004 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 5846 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2022-10-16 13:22:20,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 7004 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 5846 Invalid, 6 Unknown, 0 Unchecked, 25.6s Time] [2022-10-16 13:22:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2022-10-16 13:22:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 3262. [2022-10-16 13:22:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 2920 states have (on average 1.422945205479452) internal successors, (4155), 2995 states have internal predecessors, (4155), 192 states have call successors, (192), 77 states have call predecessors, (192), 82 states have return successors, (200), 195 states have call predecessors, (200), 192 states have call successors, (200) [2022-10-16 13:22:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 4547 transitions. [2022-10-16 13:22:21,272 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 4547 transitions. Word has length 83 [2022-10-16 13:22:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:22:21,272 INFO L495 AbstractCegarLoop]: Abstraction has 3262 states and 4547 transitions. [2022-10-16 13:22:21,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 16 states have internal predecessors, (122), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 13:22:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 4547 transitions. [2022-10-16 13:22:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-16 13:22:21,274 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:22:21,274 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 13:22:21,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 13:22:21,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:22:21,489 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting hfcsusb_probeErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [write_regErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, write_regErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 73 more)] === [2022-10-16 13:22:21,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:22:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash -593330700, now seen corresponding path program 1 times [2022-10-16 13:22:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:22:21,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818308473] [2022-10-16 13:22:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:22:21,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:22:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:22:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:23,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:22:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:23,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 13:22:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:23,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-10-16 13:22:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-16 13:22:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:22:23,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818308473] [2022-10-16 13:22:23,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818308473] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:22:23,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:22:23,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-16 13:22:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526345478] [2022-10-16 13:22:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:22:23,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-16 13:22:23,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:22:23,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-16 13:22:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-10-16 13:22:23,725 INFO L87 Difference]: Start difference. First operand 3262 states and 4547 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 8 states have internal predecessors, (63), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 13:22:29,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:31,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:33,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:35,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:37,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:39,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:41,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []