./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-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-1.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 cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:22:59,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:22:59,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:22:59,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:22:59,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:22:59,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:22:59,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:22:59,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:22:59,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:22:59,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:22:59,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:22:59,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:22:59,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:22:59,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:22:59,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:22:59,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:22:59,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:22:59,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:22:59,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:22:59,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:22:59,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:22:59,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:22:59,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:22:59,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:22:59,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:22:59,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:22:59,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:22:59,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:22:59,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:22:59,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:22:59,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:22:59,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:22:59,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:22:59,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:22:59,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:22:59,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:22:59,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:22:59,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:22:59,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:22:59,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:22:59,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:22:59,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:22:59,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:22:59,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:22:59,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:22:59,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:22:59,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:22:59,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:22:59,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:22:59,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:22:59,920 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:22:59,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:22:59,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:22:59,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:22:59,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:22:59,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:22:59,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:22:59,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:22:59,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:22:59,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:22:59,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:22:59,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:22:59,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:22:59,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:22:59,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:22:59,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:22:59,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:22:59,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:22:59,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:22:59,924 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:22:59,924 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:22:59,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:22:59,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:22:59,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2021-12-22 14:23:00,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:23:00,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:23:00,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:23:00,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:23:00,155 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:23:00,155 INFO L432 ainManager$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-1.i [2021-12-22 14:23:00,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90b992fd/2e558e7ad0294c1b867e80ebe9a083c3/FLAGe2cc51c9b [2021-12-22 14:23:00,689 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:23:00,690 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-1.i [2021-12-22 14:23:00,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90b992fd/2e558e7ad0294c1b867e80ebe9a083c3/FLAGe2cc51c9b [2021-12-22 14:23:00,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90b992fd/2e558e7ad0294c1b867e80ebe9a083c3 [2021-12-22 14:23:00,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:23:00,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:23:00,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:23:00,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:23:00,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:23:00,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:23:00" (1/1) ... [2021-12-22 14:23:00,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50842e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:00, skipping insertion in model container [2021-12-22 14:23:00,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:23:00" (1/1) ... [2021-12-22 14:23:00,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:23:01,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:23:01,804 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-1.i[158757,158770] [2021-12-22 14:23:01,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:23:01,873 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:23:02,052 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-1.i[158757,158770] [2021-12-22 14:23:02,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:23:02,106 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:23:02,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02 WrapperNode [2021-12-22 14:23:02,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:23:02,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:23:02,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:23:02,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:23:02,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,258 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-22 14:23:02,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:23:02,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:23:02,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:23:02,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:23:02,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:23:02,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:23:02,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:23:02,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:23:02,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (1/1) ... [2021-12-22 14:23:02,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:23:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:23:02,473 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) [2021-12-22 14:23:02,478 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 [2021-12-22 14:23:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-22 14:23:02,503 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-22 14:23:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-22 14:23:02,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-22 14:23:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-22 14:23:02,504 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-22 14:23:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:23:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:23:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:23:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:23:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-22 14:23:02,505 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-22 14:23:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-22 14:23:02,505 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-22 14:23:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:23:02,505 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:23:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-22 14:23:02,505 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-22 14:23:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-22 14:23:02,505 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-22 14:23:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-22 14:23:02,506 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-22 14:23:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:23:02,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:23:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-22 14:23:02,506 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-22 14:23:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-22 14:23:02,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-22 14:23:02,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-22 14:23:02,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-22 14:23:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-22 14:23:02,507 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-22 14:23:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-22 14:23:02,507 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-22 14:23:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-22 14:23:02,507 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-22 14:23:02,507 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-22 14:23:02,508 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-22 14:23:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:23:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-22 14:23:02,508 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-22 14:23:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:23:02,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:23:02,508 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-22 14:23:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-22 14:23:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-22 14:23:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-22 14:23:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-22 14:23:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-22 14:23:02,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-22 14:23:02,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-22 14:23:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:23:02,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:23:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-22 14:23:02,510 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-22 14:23:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:23:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-22 14:23:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-22 14:23:02,511 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-22 14:23:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-22 14:23:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-22 14:23:02,512 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-22 14:23:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-22 14:23:02,512 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-22 14:23:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-22 14:23:02,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-22 14:23:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:23:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-22 14:23:02,513 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-22 14:23:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-22 14:23:02,513 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-22 14:23:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:23:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:23:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-22 14:23:02,514 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-22 14:23:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-22 14:23:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-22 14:23:02,514 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-22 14:23:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-22 14:23:02,514 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-22 14:23:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:23:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-22 14:23:02,514 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-22 14:23:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-22 14:23:02,515 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-22 14:23:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-22 14:23:02,515 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-22 14:23:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-22 14:23:02,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-22 14:23:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-22 14:23:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-22 14:23:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-22 14:23:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-22 14:23:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-22 14:23:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-22 14:23:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 14:23:02,517 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 14:23:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-22 14:23:02,517 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-22 14:23:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-22 14:23:02,518 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-22 14:23:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:23:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:23:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-22 14:23:02,518 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-22 14:23:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-22 14:23:02,518 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-22 14:23:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-22 14:23:02,518 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-22 14:23:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-22 14:23:02,519 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-22 14:23:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-22 14:23:02,519 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-22 14:23:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-22 14:23:02,519 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-22 14:23:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-22 14:23:02,520 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-22 14:23:02,520 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-22 14:23:02,520 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-22 14:23:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-22 14:23:02,522 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-22 14:23:02,522 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-22 14:23:02,522 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-22 14:23:02,523 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-22 14:23:02,524 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-22 14:23:02,524 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-22 14:23:02,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-22 14:23:02,524 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-22 14:23:02,528 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-22 14:23:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-22 14:23:02,528 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-22 14:23:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-22 14:23:02,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-22 14:23:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-22 14:23:02,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-22 14:23:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:23:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-22 14:23:02,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-22 14:23:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-22 14:23:02,529 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-22 14:23:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:23:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-22 14:23:02,530 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-22 14:23:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-22 14:23:02,530 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-22 14:23:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:23:02,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:23:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-22 14:23:02,530 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-22 14:23:03,005 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:23:03,007 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:23:15,787 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:23:15,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:23:15,799 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 14:23:15,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:23:15 BoogieIcfgContainer [2021-12-22 14:23:15,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:23:15,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:23:15,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:23:15,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:23:15,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:23:00" (1/3) ... [2021-12-22 14:23:15,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178d4254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:23:15, skipping insertion in model container [2021-12-22 14:23:15,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:23:02" (2/3) ... [2021-12-22 14:23:15,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178d4254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:23:15, skipping insertion in model container [2021-12-22 14:23:15,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:23:15" (3/3) ... [2021-12-22 14:23:15,813 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-22 14:23:15,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:23:15,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:23:15,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:23:15,873 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 [2021-12-22 14:23:15,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:23:15,912 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) [2021-12-22 14:23:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 14:23:15,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:15,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:23:15,916 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-22 14:23:15,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:15,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665855364] [2021-12-22 14:23:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:15,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:16,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:16,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:16,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:16,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665855364] [2021-12-22 14:23:16,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665855364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:16,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:16,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:23:16,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052502817] [2021-12-22 14:23:16,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:16,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:23:16,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:23:16,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:23:16,530 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) [2021-12-22 14:23:18,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:23:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:23:23,298 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-22 14:23:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:23:23,300 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 [2021-12-22 14:23:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:23:23,336 INFO L225 Difference]: With dead ends: 3954 [2021-12-22 14:23:23,337 INFO L226 Difference]: Without dead ends: 2729 [2021-12-22 14:23:23,351 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 [2021-12-22 14:23:23,354 INFO L933 BasicCegarLoop]: 2078 mSDtfsCounter, 2721 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3015 SdHoareTripleChecker+Valid, 4331 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:23:23,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3015 Valid, 4331 Invalid, 2031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 1118 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-12-22 14:23:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-22 14:23:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-22 14:23:23,531 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) [2021-12-22 14:23:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-22 14:23:23,547 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-22 14:23:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:23:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-22 14:23:23,548 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) [2021-12-22 14:23:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-22 14:23:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 14:23:23,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:23,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:23:23,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:23:23,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-22 14:23:23,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:23,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686863242] [2021-12-22 14:23:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:23,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:23,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:23,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:23,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686863242] [2021-12-22 14:23:23,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686863242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:23,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:23,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:23:23,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156252508] [2021-12-22 14:23:23,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:23,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:23:23,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:23:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:23:23,755 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) [2021-12-22 14:23:25,780 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 [] [2021-12-22 14:23:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:23:30,816 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-22 14:23:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:23:30,817 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 [2021-12-22 14:23:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:23:30,846 INFO L225 Difference]: With dead ends: 6504 [2021-12-22 14:23:30,847 INFO L226 Difference]: Without dead ends: 5418 [2021-12-22 14:23:30,854 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 [2021-12-22 14:23:30,855 INFO L933 BasicCegarLoop]: 2801 mSDtfsCounter, 2384 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 790 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 5387 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:23:30,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2676 Valid, 5387 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1138 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-12-22 14:23:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-22 14:23:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-22 14:23:31,008 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) [2021-12-22 14:23:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-22 14:23:31,026 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-22 14:23:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:23:31,027 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-22 14:23:31,027 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) [2021-12-22 14:23:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-22 14:23:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 14:23:31,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:31,028 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] [2021-12-22 14:23:31,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:23:31,029 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:31,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-22 14:23:31,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:31,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799950625] [2021-12-22 14:23:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:31,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:31,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:31,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:31,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 14:23:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:31,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:23:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:31,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:31,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799950625] [2021-12-22 14:23:31,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799950625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:31,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:23:31,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777153856] [2021-12-22 14:23:31,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:31,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:23:31,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:23:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:23:31,262 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) [2021-12-22 14:23:33,287 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 [] [2021-12-22 14:23:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:23:37,800 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-22 14:23:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:23:37,801 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 [2021-12-22 14:23:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:23:37,874 INFO L225 Difference]: With dead ends: 11851 [2021-12-22 14:23:37,875 INFO L226 Difference]: Without dead ends: 10750 [2021-12-22 14:23:37,890 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 [2021-12-22 14:23:37,893 INFO L933 BasicCegarLoop]: 2258 mSDtfsCounter, 2626 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2917 SdHoareTripleChecker+Valid, 4408 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:23:37,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2917 Valid, 4408 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1131 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-12-22 14:23:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-22 14:23:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-22 14:23:38,184 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) [2021-12-22 14:23:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-22 14:23:38,214 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-22 14:23:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:23:38,214 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-22 14:23:38,214 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) [2021-12-22 14:23:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-22 14:23:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 14:23:38,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:23:38,220 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] [2021-12-22 14:23:38,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:23:38,220 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:23:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:23:38,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-22 14:23:38,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:23:38,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089689791] [2021-12-22 14:23:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:23:38,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:23:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:38,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:23:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:38,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:23:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:38,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 14:23:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:39,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:23:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:23:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:23:39,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:23:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089689791] [2021-12-22 14:23:39,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089689791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:23:39,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:23:39,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 14:23:39,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315029411] [2021-12-22 14:23:39,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:23:39,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 14:23:39,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:23:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 14:23:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-22 14:23:39,161 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) [2021-12-22 14:23:41,191 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 [] [2021-12-22 14:24:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:24:00,678 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2021-12-22 14:24:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 14:24:00,678 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 [2021-12-22 14:24:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:24:00,757 INFO L225 Difference]: With dead ends: 22061 [2021-12-22 14:24:00,757 INFO L226 Difference]: Without dead ends: 16650 [2021-12-22 14:24:00,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-12-22 14:24:00,782 INFO L933 BasicCegarLoop]: 2611 mSDtfsCounter, 3303 mSDsluCounter, 24798 mSDsCounter, 0 mSdLazyCounter, 8553 mSolverCounterSat, 1476 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 27409 SdHoareTripleChecker+Invalid, 10030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1476 IncrementalHoareTripleChecker+Valid, 8553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:24:00,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3602 Valid, 27409 Invalid, 10030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1476 Valid, 8553 Invalid, 1 Unknown, 0 Unchecked, 19.9s Time] [2021-12-22 14:24:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2021-12-22 14:24:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2021-12-22 14:24:01,189 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) [2021-12-22 14:24:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2021-12-22 14:24:01,245 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2021-12-22 14:24:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:24:01,245 INFO L470 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2021-12-22 14:24:01,246 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) [2021-12-22 14:24:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2021-12-22 14:24:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 14:24:01,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:24:01,249 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] [2021-12-22 14:24:01,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:24:01,250 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:24:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:24:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2021-12-22 14:24:01,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:24:01,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312087846] [2021-12-22 14:24:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:24:01,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:24:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:24:02,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:24:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:24:02,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:24:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:24:02,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:24:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:24:02,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:24:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:24:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:24:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:24:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:24:02,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:24:02,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312087846] [2021-12-22 14:24:02,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312087846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:24:02,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:24:02,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-22 14:24:02,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086460013] [2021-12-22 14:24:02,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:24:02,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 14:24:02,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:24:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 14:24:02,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-12-22 14:24:02,585 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)