./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:28:51,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:28:51,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:28:51,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:28:51,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:28:51,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:28:51,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:28:51,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:28:51,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:28:51,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:28:51,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:28:51,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:28:51,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:28:51,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:28:51,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:28:51,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:28:51,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:28:51,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:28:51,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:28:51,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:28:51,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:28:51,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:28:51,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:28:51,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:28:51,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:28:51,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:28:51,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:28:51,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:28:51,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:28:51,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:28:51,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:28:51,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:28:51,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:28:51,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:28:51,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:28:51,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:28:51,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:28:51,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:28:51,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:28:51,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:28:51,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:28:51,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:28:51,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:28:51,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:28:51,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:28:51,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:28:51,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:28:51,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:28:51,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:28:51,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:28:51,447 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:28:51,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:28:51,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:28:51,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:28:51,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:28:51,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:28:51,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:28:51,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:28:51,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:28:51,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:28:51,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:28:51,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:28:51,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:28:51,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:28:51,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:28:51,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:28:51,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:28:51,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:28:51,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:28:51,458 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:28:51,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:28:51,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:28:51,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:28:51,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2021-12-14 17:28:51,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:28:51,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:28:51,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:28:51,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:28:51,631 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:28:51,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-14 17:28:51,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b9b37d3/f0a06b1b7a384fdcb6363fa558180671/FLAG87345e3d4 [2021-12-14 17:28:52,269 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:28:52,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-14 17:28:52,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b9b37d3/f0a06b1b7a384fdcb6363fa558180671/FLAG87345e3d4 [2021-12-14 17:28:52,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b9b37d3/f0a06b1b7a384fdcb6363fa558180671 [2021-12-14 17:28:52,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:28:52,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:28:52,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:28:52,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:28:52,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:28:52,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:52" (1/1) ... [2021-12-14 17:28:52,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bac0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:52, skipping insertion in model container [2021-12-14 17:28:52,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:52" (1/1) ... [2021-12-14 17:28:52,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:28:52,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:28:53,530 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-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-12-14 17:28:53,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:28:53,583 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:28:53,745 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-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-12-14 17:28:53,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:28:53,801 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:28:53,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53 WrapperNode [2021-12-14 17:28:53,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:28:53,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:28:53,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:28:53,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:28:53,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:53,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:53,969 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-14 17:28:53,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:28:53,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:28:53,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:28:53,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:28:53,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:53,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:54,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:54,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:54,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:54,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:54,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:54,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:28:54,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:28:54,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:28:54,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:28:54,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (1/1) ... [2021-12-14 17:28:54,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:28:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:28:54,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:28:54,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:28:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-14 17:28:54,231 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-14 17:28:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-14 17:28:54,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-14 17:28:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-14 17:28:54,232 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-14 17:28:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:28:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:28:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:28:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:28:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-14 17:28:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-14 17:28:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-14 17:28:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-14 17:28:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:28:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:28:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-14 17:28:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-14 17:28:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-14 17:28:54,234 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-14 17:28:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-14 17:28:54,234 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-14 17:28:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:28:54,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:28:54,234 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-14 17:28:54,234 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-14 17:28:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-14 17:28:54,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-14 17:28:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-14 17:28:54,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-14 17:28:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-14 17:28:54,235 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-14 17:28:54,235 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-14 17:28:54,235 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-14 17:28:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-14 17:28:54,236 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-14 17:28:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-14 17:28:54,236 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-14 17:28:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:28:54,236 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-14 17:28:54,236 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-14 17:28:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:28:54,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:28:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-14 17:28:54,237 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-14 17:28:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-14 17:28:54,237 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-14 17:28:54,237 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-14 17:28:54,237 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-14 17:28:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-14 17:28:54,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-14 17:28:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:28:54,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:28:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-14 17:28:54,238 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-14 17:28:54,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:28:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-14 17:28:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-14 17:28:54,239 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-14 17:28:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-14 17:28:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-14 17:28:54,239 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-14 17:28:54,239 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-14 17:28:54,239 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-14 17:28:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-14 17:28:54,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-14 17:28:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:28:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-14 17:28:54,240 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-14 17:28:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-14 17:28:54,240 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-14 17:28:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:28:54,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:28:54,241 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-14 17:28:54,241 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-14 17:28:54,241 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-14 17:28:54,241 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-14 17:28:54,241 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-14 17:28:54,241 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-14 17:28:54,242 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-14 17:28:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:28:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-14 17:28:54,242 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-14 17:28:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-14 17:28:54,242 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-14 17:28:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-14 17:28:54,242 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-14 17:28:54,243 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-14 17:28:54,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-14 17:28:54,243 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-14 17:28:54,243 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-14 17:28:54,243 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-14 17:28:54,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-14 17:28:54,243 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-14 17:28:54,243 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-14 17:28:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-14 17:28:54,244 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-14 17:28:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-14 17:28:54,244 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-14 17:28:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-14 17:28:54,244 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-14 17:28:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:28:54,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:28:54,245 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-14 17:28:54,245 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-14 17:28:54,245 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-14 17:28:54,245 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-14 17:28:54,245 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-14 17:28:54,245 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-14 17:28:54,245 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-14 17:28:54,245 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-14 17:28:54,246 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-14 17:28:54,246 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-14 17:28:54,246 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-14 17:28:54,246 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-14 17:28:54,246 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-14 17:28:54,246 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-14 17:28:54,246 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:28:54,246 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:28:54,247 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-14 17:28:54,247 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-14 17:28:54,247 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-14 17:28:54,247 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-14 17:28:54,247 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-14 17:28:54,247 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-14 17:28:54,247 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-14 17:28:54,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-14 17:28:54,248 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-14 17:28:54,248 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-14 17:28:54,248 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-14 17:28:54,248 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-14 17:28:54,248 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-14 17:28:54,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-14 17:28:54,248 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-14 17:28:54,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-14 17:28:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:28:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-14 17:28:54,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-14 17:28:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-14 17:28:54,249 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-14 17:28:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:28:54,249 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-14 17:28:54,249 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-14 17:28:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-14 17:28:54,250 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-14 17:28:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:28:54,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:28:54,250 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-14 17:28:54,250 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-14 17:28:54,669 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:28:54,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:29:06,921 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:29:06,936 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:29:06,936 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 17:29:06,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:29:06 BoogieIcfgContainer [2021-12-14 17:29:06,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:29:06,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:29:06,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:29:06,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:29:06,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:28:52" (1/3) ... [2021-12-14 17:29:06,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c76289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:29:06, skipping insertion in model container [2021-12-14 17:29:06,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:53" (2/3) ... [2021-12-14 17:29:06,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c76289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:29:06, skipping insertion in model container [2021-12-14 17:29:06,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:29:06" (3/3) ... [2021-12-14 17:29:06,945 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-14 17:29:06,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:29:06,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:29:06,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:29:06,989 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:29:06,989 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:29:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2021-12-14 17:29:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 17:29:07,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:07,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:07,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-14 17:29:07,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:07,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408466280] [2021-12-14 17:29:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:07,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:07,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:07,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408466280] [2021-12-14 17:29:07,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408466280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:07,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:07,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:29:07,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792280946] [2021-12-14 17:29:07,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:07,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:29:07,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:29:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:29:07,574 INFO L87 Difference]: Start difference. First operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:09,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:29:13,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:29:13,658 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-14 17:29:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:29:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 17 [2021-12-14 17:29:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:29:13,689 INFO L225 Difference]: With dead ends: 3954 [2021-12-14 17:29:13,689 INFO L226 Difference]: Without dead ends: 2729 [2021-12-14 17:29:13,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:29:13,716 INFO L933 BasicCegarLoop]: 2079 mSDtfsCounter, 2721 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3015 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:29:13,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3015 Valid, 4334 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 1118 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-12-14 17:29:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-14 17:29:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-14 17:29:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1510 states have (on average 1.3543046357615893) internal successors, (2045), 1568 states have internal predecessors, (2045), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2021-12-14 17:29:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-14 17:29:13,894 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-14 17:29:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:29:13,895 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-14 17:29:13,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-14 17:29:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 17:29:13,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:13,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:13,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:29:13,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-14 17:29:13,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:13,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686875435] [2021-12-14 17:29:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:13,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:14,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:14,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:14,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686875435] [2021-12-14 17:29:14,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686875435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:14,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:14,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:29:14,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825647112] [2021-12-14 17:29:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:14,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:29:14,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:29:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:29:14,115 INFO L87 Difference]: Start difference. First operand 2224 states and 3222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:16,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:29:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:29:19,624 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-14 17:29:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:29:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 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 18 [2021-12-14 17:29:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:29:19,652 INFO L225 Difference]: With dead ends: 6504 [2021-12-14 17:29:19,652 INFO L226 Difference]: Without dead ends: 5418 [2021-12-14 17:29:19,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:29:19,665 INFO L933 BasicCegarLoop]: 2798 mSDtfsCounter, 2384 mSDsluCounter, 2582 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 5380 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:29:19,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2678 Valid, 5380 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 1137 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-12-14 17:29:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-14 17:29:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-14 17:29:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 2997 states have (on average 1.3546880213546881) internal successors, (4060), 3107 states have internal predecessors, (4060), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2021-12-14 17:29:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-14 17:29:19,804 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-14 17:29:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:29:19,804 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-14 17:29:19,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 17:29:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-14 17:29:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 17:29:19,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:19,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:19,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:29:19,806 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:19,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-14 17:29:19,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:19,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509836061] [2021-12-14 17:29:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:19,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:29:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:29:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:20,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509836061] [2021-12-14 17:29:20,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509836061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:20,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:20,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:29:20,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208717568] [2021-12-14 17:29:20,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:20,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:29:20,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:29:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:29:20,063 INFO L87 Difference]: Start difference. First operand 4408 states and 6390 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:29:22,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:29:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:29:26,083 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-14 17:29:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:29:26,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 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 36 [2021-12-14 17:29:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:29:26,203 INFO L225 Difference]: With dead ends: 11851 [2021-12-14 17:29:26,204 INFO L226 Difference]: Without dead ends: 10750 [2021-12-14 17:29:26,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:29:26,213 INFO L933 BasicCegarLoop]: 2262 mSDtfsCounter, 2626 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2916 SdHoareTripleChecker+Valid, 4419 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:29:26,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2916 Valid, 4419 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-12-14 17:29:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-14 17:29:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-14 17:29:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 5224 states have (on average 1.354709035222052) internal successors, (7077), 5414 states have internal predecessors, (7077), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2021-12-14 17:29:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-14 17:29:26,467 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-14 17:29:26,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:29:26,468 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-14 17:29:26,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 17:29:26,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-14 17:29:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 17:29:26,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:26,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:29:26,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:29:26,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:26,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-14 17:29:26,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:26,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63053305] [2021-12-14 17:29:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:26,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:26,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:26,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:29:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:27,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:29:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 17:29:27,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:27,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63053305] [2021-12-14 17:29:27,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63053305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:27,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:27,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-14 17:29:27,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818709144] [2021-12-14 17:29:27,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:27,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:29:27,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:29:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:29:27,141 INFO L87 Difference]: Start difference. First operand 7676 states and 11129 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 17:29:29,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:29:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:29:45,023 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2021-12-14 17:29:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 17:29:45,023 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-12-14 17:29:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:29:45,142 INFO L225 Difference]: With dead ends: 22061 [2021-12-14 17:29:45,142 INFO L226 Difference]: Without dead ends: 16650 [2021-12-14 17:29:45,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-12-14 17:29:45,180 INFO L933 BasicCegarLoop]: 2612 mSDtfsCounter, 3303 mSDsluCounter, 24809 mSDsCounter, 0 mSdLazyCounter, 8542 mSolverCounterSat, 1477 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3601 SdHoareTripleChecker+Valid, 27421 SdHoareTripleChecker+Invalid, 10020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 8542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:29:45,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3601 Valid, 27421 Invalid, 10020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1477 Valid, 8542 Invalid, 1 Unknown, 0 Unchecked, 16.7s Time] [2021-12-14 17:29:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2021-12-14 17:29:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2021-12-14 17:29:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10978 states, 7469 states have (on average 1.3542642924086223) internal successors, (10115), 7739 states have internal predecessors, (10115), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2021-12-14 17:29:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2021-12-14 17:29:45,722 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2021-12-14 17:29:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:29:45,723 INFO L470 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2021-12-14 17:29:45,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 17:29:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2021-12-14 17:29:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 17:29:45,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:29:45,725 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:29:45,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:29:45,726 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:29:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:29:45,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2021-12-14 17:29:45,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:29:45,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595276547] [2021-12-14 17:29:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:29:45,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:29:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:46,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:29:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:46,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:29:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:29:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:46,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:29:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:29:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:29:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 17:29:46,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:29:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595276547] [2021-12-14 17:29:46,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595276547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:29:46,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:29:46,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-14 17:29:46,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400197917] [2021-12-14 17:29:46,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:29:46,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 17:29:46,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:29:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 17:29:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:29:46,813 INFO L87 Difference]: Start difference. First operand 10978 states and 15913 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 17:29:48,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []