./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 13:00:26,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 13:00:26,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 13:00:26,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 13:00:26,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 13:00:26,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 13:00:26,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 13:00:26,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 13:00:26,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 13:00:26,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 13:00:26,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 13:00:26,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 13:00:26,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 13:00:26,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 13:00:26,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 13:00:26,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 13:00:26,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 13:00:26,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 13:00:26,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 13:00:26,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 13:00:26,980 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 13:00:26,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 13:00:26,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 13:00:26,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 13:00:26,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 13:00:26,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 13:00:26,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 13:00:26,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 13:00:26,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 13:00:26,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 13:00:26,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 13:00:26,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 13:00:26,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 13:00:26,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 13:00:26,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 13:00:26,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 13:00:26,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 13:00:26,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 13:00:26,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 13:00:26,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 13:00:26,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 13:00:26,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 13:00:27,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-12 13:00:27,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 13:00:27,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 13:00:27,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 13:00:27,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 13:00:27,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 13:00:27,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 13:00:27,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 13:00:27,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 13:00:27,017 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 13:00:27,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 13:00:27,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 13:00:27,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 13:00:27,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 13:00:27,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 13:00:27,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 13:00:27,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 13:00:27,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 13:00:27,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 13:00:27,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 13:00:27,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 13:00:27,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 13:00:27,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 13:00:27,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 13:00:27,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 13:00:27,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 13:00:27,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 13:00:27,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 13:00:27,020 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 13:00:27,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 13:00:27,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 13:00:27,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2022-07-12 13:00:27,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 13:00:27,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 13:00:27,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 13:00:27,253 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 13:00:27,254 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 13:00:27,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2022-07-12 13:00:27,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854e91331/0580503e13f8441592c7137064a27bbe/FLAGfec0bc2bb [2022-07-12 13:00:27,855 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 13:00:27,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2022-07-12 13:00:27,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854e91331/0580503e13f8441592c7137064a27bbe/FLAGfec0bc2bb [2022-07-12 13:00:28,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854e91331/0580503e13f8441592c7137064a27bbe [2022-07-12 13:00:28,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 13:00:28,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 13:00:28,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 13:00:28,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 13:00:28,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 13:00:28,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 01:00:28" (1/1) ... [2022-07-12 13:00:28,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e1e22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:28, skipping insertion in model container [2022-07-12 13:00:28,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 01:00:28" (1/1) ... [2022-07-12 13:00:28,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 13:00:28,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 13:00:28,848 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-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2022-07-12 13:00:29,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 13:00:29,219 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 13:00:29,284 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-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2022-07-12 13:00:29,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 13:00:29,460 INFO L208 MainTranslator]: Completed translation [2022-07-12 13:00:29,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29 WrapperNode [2022-07-12 13:00:29,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 13:00:29,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 13:00:29,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 13:00:29,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 13:00:29,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,666 INFO L137 Inliner]: procedures = 203, calls = 1280, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 3595 [2022-07-12 13:00:29,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 13:00:29,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 13:00:29,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 13:00:29,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 13:00:29,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 13:00:29,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 13:00:29,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 13:00:29,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 13:00:29,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (1/1) ... [2022-07-12 13:00:29,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 13:00:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 13:00:29,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 13:00:29,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 13:00:29,932 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-12 13:00:29,932 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-12 13:00:29,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2022-07-12 13:00:29,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2022-07-12 13:00:29,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-12 13:00:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-12 13:00:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-12 13:00:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-12 13:00:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-12 13:00:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-12 13:00:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-12 13:00:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-12 13:00:29,933 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-12 13:00:29,933 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-12 13:00:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-12 13:00:29,934 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-12 13:00:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 13:00:29,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 13:00:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-12 13:00:29,934 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-12 13:00:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-12 13:00:29,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-12 13:00:29,934 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-12 13:00:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-12 13:00:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-12 13:00:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-12 13:00:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-12 13:00:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-12 13:00:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-12 13:00:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-12 13:00:29,935 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-12 13:00:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-12 13:00:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 13:00:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 13:00:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-12 13:00:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-12 13:00:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-12 13:00:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-12 13:00:29,936 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-12 13:00:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-12 13:00:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 13:00:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-12 13:00:29,937 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-12 13:00:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 13:00:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-12 13:00:29,937 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-12 13:00:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-12 13:00:29,938 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-12 13:00:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-12 13:00:29,938 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-12 13:00:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-12 13:00:29,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-12 13:00:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-12 13:00:29,938 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-12 13:00:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-12 13:00:29,939 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-12 13:00:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 13:00:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 13:00:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-12 13:00:29,940 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-12 13:00:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-12 13:00:29,940 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-12 13:00:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-12 13:00:29,941 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-12 13:00:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-12 13:00:29,941 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-12 13:00:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-12 13:00:29,941 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-12 13:00:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-12 13:00:29,942 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-12 13:00:29,942 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-12 13:00:29,942 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-12 13:00:29,942 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-12 13:00:29,942 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-12 13:00:29,942 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-12 13:00:29,943 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-12 13:00:29,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-12 13:00:29,943 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-12 13:00:29,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-12 13:00:29,943 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-12 13:00:29,943 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-12 13:00:29,943 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-12 13:00:29,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-12 13:00:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-12 13:00:29,944 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-12 13:00:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-12 13:00:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 13:00:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-12 13:00:29,944 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-12 13:00:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-12 13:00:29,945 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-12 13:00:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-12 13:00:29,945 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-12 13:00:29,945 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-12 13:00:29,945 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-12 13:00:29,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 13:00:29,946 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-12 13:00:29,946 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-12 13:00:29,946 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-12 13:00:29,946 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-12 13:00:29,947 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-12 13:00:29,947 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-12 13:00:29,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-12 13:00:29,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-12 13:00:29,947 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2022-07-12 13:00:29,947 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2022-07-12 13:00:29,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 13:00:29,947 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-12 13:00:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-12 13:00:29,948 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-12 13:00:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-12 13:00:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-12 13:00:29,948 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-12 13:00:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-12 13:00:29,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-12 13:00:29,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 13:00:29,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 13:00:29,949 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-12 13:00:29,950 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-12 13:00:29,951 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-12 13:00:29,951 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-12 13:00:29,951 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-12 13:00:29,952 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-12 13:00:29,952 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-12 13:00:29,953 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-12 13:00:29,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-12 13:00:29,953 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-12 13:00:29,953 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-12 13:00:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-12 13:00:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-12 13:00:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-12 13:00:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-12 13:00:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-12 13:00:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-12 13:00:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-12 13:00:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-12 13:00:29,957 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-12 13:00:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-12 13:00:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-12 13:00:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-12 13:00:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-12 13:00:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-12 13:00:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-12 13:00:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-12 13:00:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-12 13:00:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-12 13:00:29,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 13:00:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-12 13:00:29,959 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-12 13:00:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 13:00:29,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 13:00:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-12 13:00:29,959 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-12 13:00:30,450 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 13:00:30,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 13:00:30,598 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-12 13:00:43,759 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 13:00:43,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 13:00:43,777 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 13:00:43,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 01:00:43 BoogieIcfgContainer [2022-07-12 13:00:43,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 13:00:43,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 13:00:43,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 13:00:43,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 13:00:43,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 01:00:28" (1/3) ... [2022-07-12 13:00:43,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34246303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 01:00:43, skipping insertion in model container [2022-07-12 13:00:43,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:00:29" (2/3) ... [2022-07-12 13:00:43,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34246303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 01:00:43, skipping insertion in model container [2022-07-12 13:00:43,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 01:00:43" (3/3) ... [2022-07-12 13:00:43,788 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2022-07-12 13:00:43,798 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 13:00:43,798 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 13:00:43,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 13:00:43,872 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c2b4c5e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ed8d702 [2022-07-12 13:00:43,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 13:00:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 1328 states, 937 states have (on average 1.4130202774813234) internal successors, (1324), 980 states have internal predecessors, (1324), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) [2022-07-12 13:00:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 13:00:43,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:00:43,900 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:00:43,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:00:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:00:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash -826194177, now seen corresponding path program 1 times [2022-07-12 13:00:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:00:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011264511] [2022-07-12 13:00:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:00:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:00:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:00:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:00:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:00:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:00:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:00:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:00:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-12 13:00:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-12 13:00:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:00:44,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:00:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011264511] [2022-07-12 13:00:44,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011264511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:00:44,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:00:44,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 13:00:44,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559551741] [2022-07-12 13:00:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:00:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 13:00:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:00:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 13:00:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 13:00:44,554 INFO L87 Difference]: Start difference. First operand has 1328 states, 937 states have (on average 1.4130202774813234) internal successors, (1324), 980 states have internal predecessors, (1324), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 13:00:46,592 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 [] [2022-07-12 13:00:48,618 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 [] [2022-07-12 13:00:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:00:54,643 INFO L93 Difference]: Finished difference Result 4152 states and 6323 transitions. [2022-07-12 13:00:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 13:00:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2022-07-12 13:00:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:00:54,697 INFO L225 Difference]: With dead ends: 4152 [2022-07-12 13:00:54,698 INFO L226 Difference]: Without dead ends: 2812 [2022-07-12 13:00:54,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 13:00:54,714 INFO L413 NwaCegarLoop]: 2108 mSDtfsCounter, 2405 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 871 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 4104 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 871 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-07-12 13:00:54,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2677 Valid, 4104 Invalid, 2485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [871 Valid, 1612 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2022-07-12 13:00:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2022-07-12 13:00:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2406. [2022-07-12 13:00:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1688 states have (on average 1.3625592417061612) internal successors, (2300), 1748 states have internal predecessors, (2300), 592 states have call successors, (592), 126 states have call predecessors, (592), 125 states have return successors, (579), 573 states have call predecessors, (579), 579 states have call successors, (579) [2022-07-12 13:00:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3471 transitions. [2022-07-12 13:00:54,891 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3471 transitions. Word has length 58 [2022-07-12 13:00:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:00:54,893 INFO L495 AbstractCegarLoop]: Abstraction has 2406 states and 3471 transitions. [2022-07-12 13:00:54,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 13:00:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3471 transitions. [2022-07-12 13:00:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 13:00:54,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:00:54,900 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:00:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 13:00:54,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:00:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:00:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2130658151, now seen corresponding path program 1 times [2022-07-12 13:00:54,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:00:54,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437139756] [2022-07-12 13:00:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:00:54,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:00:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:00:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:00:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:00:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:00:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:00:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:00:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:00:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:00:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:00:55,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:00:55,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437139756] [2022-07-12 13:00:55,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437139756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:00:55,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:00:55,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 13:00:55,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386744444] [2022-07-12 13:00:55,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:00:55,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 13:00:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:00:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 13:00:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 13:00:55,370 INFO L87 Difference]: Start difference. First operand 2406 states and 3471 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 13:00:57,396 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 [] [2022-07-12 13:01:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:01:04,055 INFO L93 Difference]: Finished difference Result 6388 states and 9553 transitions. [2022-07-12 13:01:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 13:01:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2022-07-12 13:01:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:01:04,092 INFO L225 Difference]: With dead ends: 6388 [2022-07-12 13:01:04,092 INFO L226 Difference]: Without dead ends: 6364 [2022-07-12 13:01:04,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 13:01:04,099 INFO L413 NwaCegarLoop]: 1955 mSDtfsCounter, 4253 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 1978 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4573 SdHoareTripleChecker+Valid, 4144 SdHoareTripleChecker+Invalid, 3859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1978 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-07-12 13:01:04,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4573 Valid, 4144 Invalid, 3859 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1978 Valid, 1880 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-07-12 13:01:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6364 states. [2022-07-12 13:01:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6364 to 4728. [2022-07-12 13:01:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 3325 states have (on average 1.3621052631578947) internal successors, (4529), 3433 states have internal predecessors, (4529), 1158 states have call successors, (1158), 247 states have call predecessors, (1158), 244 states have return successors, (1146), 1131 states have call predecessors, (1146), 1146 states have call successors, (1146) [2022-07-12 13:01:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 6833 transitions. [2022-07-12 13:01:04,309 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 6833 transitions. Word has length 56 [2022-07-12 13:01:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:01:04,309 INFO L495 AbstractCegarLoop]: Abstraction has 4728 states and 6833 transitions. [2022-07-12 13:01:04,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 13:01:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 6833 transitions. [2022-07-12 13:01:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 13:01:04,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:01:04,311 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:01:04,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 13:01:04,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:01:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:01:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1626874934, now seen corresponding path program 1 times [2022-07-12 13:01:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:01:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723416481] [2022-07-12 13:01:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:01:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:01:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:01:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:01:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:01:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:01:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:01:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:01:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:01:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:01:04,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:01:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723416481] [2022-07-12 13:01:04,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723416481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:01:04,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:01:04,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 13:01:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088671842] [2022-07-12 13:01:04,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:01:04,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 13:01:04,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:01:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 13:01:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 13:01:04,615 INFO L87 Difference]: Start difference. First operand 4728 states and 6833 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 13:01:06,639 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 [] [2022-07-12 13:01:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:01:14,308 INFO L93 Difference]: Finished difference Result 17375 states and 25771 transitions. [2022-07-12 13:01:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 13:01:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2022-07-12 13:01:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:01:14,368 INFO L225 Difference]: With dead ends: 17375 [2022-07-12 13:01:14,368 INFO L226 Difference]: Without dead ends: 12662 [2022-07-12 13:01:14,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 13:01:14,392 INFO L413 NwaCegarLoop]: 2149 mSDtfsCounter, 3521 mSDsluCounter, 2937 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 1108 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3840 SdHoareTripleChecker+Valid, 5086 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1108 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-07-12 13:01:14,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3840 Valid, 5086 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1108 Valid, 2442 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2022-07-12 13:01:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2022-07-12 13:01:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 9387. [2022-07-12 13:01:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 6610 states have (on average 1.3629349470499244) internal successors, (9009), 6818 states have internal predecessors, (9009), 2294 states have call successors, (2294), 487 states have call predecessors, (2294), 482 states have return successors, (2276), 2249 states have call predecessors, (2276), 2276 states have call successors, (2276) [2022-07-12 13:01:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 13579 transitions. [2022-07-12 13:01:14,710 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 13579 transitions. Word has length 57 [2022-07-12 13:01:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:01:14,711 INFO L495 AbstractCegarLoop]: Abstraction has 9387 states and 13579 transitions. [2022-07-12 13:01:14,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 13:01:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 13579 transitions. [2022-07-12 13:01:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 13:01:14,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:01:14,715 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:01:14,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 13:01:14,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:01:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:01:14,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1151289838, now seen corresponding path program 1 times [2022-07-12 13:01:14,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:01:14,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966543800] [2022-07-12 13:01:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:01:14,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:01:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:01:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:01:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:01:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:01:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:01:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:01:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:01:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-12 13:01:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:01:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:01:14,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:01:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966543800] [2022-07-12 13:01:14,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966543800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:01:14,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:01:14,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 13:01:14,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976392224] [2022-07-12 13:01:14,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:01:14,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 13:01:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:01:14,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 13:01:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 13:01:14,989 INFO L87 Difference]: Start difference. First operand 9387 states and 13579 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 13:01:17,016 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 [] [2022-07-12 13:01:19,041 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 [] [2022-07-12 13:01:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:01:26,902 INFO L93 Difference]: Finished difference Result 34642 states and 51390 transitions. [2022-07-12 13:01:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 13:01:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2022-07-12 13:01:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:01:27,022 INFO L225 Difference]: With dead ends: 34642 [2022-07-12 13:01:27,022 INFO L226 Difference]: Without dead ends: 25267 [2022-07-12 13:01:27,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 13:01:27,059 INFO L413 NwaCegarLoop]: 1985 mSDtfsCounter, 3533 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 1162 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3851 SdHoareTripleChecker+Valid, 4718 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1162 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-07-12 13:01:27,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3851 Valid, 4718 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1162 Valid, 2462 Invalid, 2 Unknown, 0 Unchecked, 11.2s Time] [2022-07-12 13:01:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25267 states. [2022-07-12 13:01:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25267 to 18698. [2022-07-12 13:01:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18698 states, 13181 states have (on average 1.3634018663227372) internal successors, (17971), 13585 states have internal predecessors, (17971), 4558 states have call successors, (4558), 966 states have call predecessors, (4558), 958 states have return successors, (4538), 4482 states have call predecessors, (4538), 4538 states have call successors, (4538) [2022-07-12 13:01:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18698 states to 18698 states and 27067 transitions. [2022-07-12 13:01:27,847 INFO L78 Accepts]: Start accepts. Automaton has 18698 states and 27067 transitions. Word has length 75 [2022-07-12 13:01:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:01:27,848 INFO L495 AbstractCegarLoop]: Abstraction has 18698 states and 27067 transitions. [2022-07-12 13:01:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 13:01:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 18698 states and 27067 transitions. [2022-07-12 13:01:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-12 13:01:27,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:01:27,853 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:01:27,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 13:01:27,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:01:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:01:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1212646870, now seen corresponding path program 1 times [2022-07-12 13:01:27,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:01:27,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797728099] [2022-07-12 13:01:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:01:27,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:01:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:01:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:01:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:01:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:01:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:01:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:01:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:01:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-12 13:01:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:01:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:01:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:01:28,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:01:28,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797728099] [2022-07-12 13:01:28,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797728099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:01:28,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:01:28,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 13:01:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527663462] [2022-07-12 13:01:28,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:01:28,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 13:01:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:01:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 13:01:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-12 13:01:28,958 INFO L87 Difference]: Start difference. First operand 18698 states and 27067 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-12 13:01:30,984 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 [] [2022-07-12 13:02:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:02:03,073 INFO L93 Difference]: Finished difference Result 65778 states and 98173 transitions. [2022-07-12 13:02:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 13:02:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-07-12 13:02:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:02:03,315 INFO L225 Difference]: With dead ends: 65778 [2022-07-12 13:02:03,315 INFO L226 Difference]: Without dead ends: 47095 [2022-07-12 13:02:03,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 13:02:03,382 INFO L413 NwaCegarLoop]: 2194 mSDtfsCounter, 5207 mSDsluCounter, 16550 mSDsCounter, 0 mSdLazyCounter, 13578 mSolverCounterSat, 2380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5592 SdHoareTripleChecker+Valid, 18744 SdHoareTripleChecker+Invalid, 15959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2380 IncrementalHoareTripleChecker+Valid, 13578 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2022-07-12 13:02:03,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5592 Valid, 18744 Invalid, 15959 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2380 Valid, 13578 Invalid, 1 Unknown, 0 Unchecked, 31.7s Time] [2022-07-12 13:02:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47095 states. [2022-07-12 13:02:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47095 to 32538. [2022-07-12 13:02:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32538 states, 22927 states have (on average 1.3639813320539103) internal successors, (31272), 23638 states have internal predecessors, (31272), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7813 states have call predecessors, (7954), 7912 states have call successors, (7954) [2022-07-12 13:02:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32538 states to 32538 states and 47158 transitions. [2022-07-12 13:02:04,660 INFO L78 Accepts]: Start accepts. Automaton has 32538 states and 47158 transitions. Word has length 77 [2022-07-12 13:02:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:02:04,661 INFO L495 AbstractCegarLoop]: Abstraction has 32538 states and 47158 transitions. [2022-07-12 13:02:04,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-12 13:02:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 32538 states and 47158 transitions. [2022-07-12 13:02:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 13:02:04,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:02:04,665 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:02:04,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 13:02:04,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:02:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:02:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1467384912, now seen corresponding path program 1 times [2022-07-12 13:02:04,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:02:04,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237646176] [2022-07-12 13:02:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:02:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:02:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:02:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:02:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:02:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:02:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:02:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:02:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:02:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-12 13:02:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:02:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-12 13:02:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-12 13:02:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:02:05,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:02:05,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237646176] [2022-07-12 13:02:05,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237646176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:02:05,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:02:05,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 13:02:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254210411] [2022-07-12 13:02:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:02:05,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 13:02:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:02:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 13:02:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 13:02:05,183 INFO L87 Difference]: Start difference. First operand 32538 states and 47158 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 13:02:07,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 13:02:09,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 13:02:11,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 13:02:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:02:20,165 INFO L93 Difference]: Finished difference Result 76464 states and 112983 transitions. [2022-07-12 13:02:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 13:02:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2022-07-12 13:02:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:02:20,410 INFO L225 Difference]: With dead ends: 76464 [2022-07-12 13:02:20,411 INFO L226 Difference]: Without dead ends: 43941 [2022-07-12 13:02:20,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 13:02:20,493 INFO L413 NwaCegarLoop]: 3330 mSDtfsCounter, 2702 mSDsluCounter, 4115 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 820 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3011 SdHoareTripleChecker+Valid, 7445 SdHoareTripleChecker+Invalid, 3643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-07-12 13:02:20,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3011 Valid, 7445 Invalid, 3643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 2820 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2022-07-12 13:02:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43941 states. [2022-07-12 13:02:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43941 to 32519. [2022-07-12 13:02:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32519 states, 22908 states have (on average 1.3635847738781213) internal successors, (31237), 23621 states have internal predecessors, (31237), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7811 states have call predecessors, (7954), 7912 states have call successors, (7954) [2022-07-12 13:02:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32519 states to 32519 states and 47123 transitions. [2022-07-12 13:02:21,745 INFO L78 Accepts]: Start accepts. Automaton has 32519 states and 47123 transitions. Word has length 92 [2022-07-12 13:02:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:02:21,745 INFO L495 AbstractCegarLoop]: Abstraction has 32519 states and 47123 transitions. [2022-07-12 13:02:21,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 13:02:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 32519 states and 47123 transitions. [2022-07-12 13:02:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-12 13:02:21,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:02:21,749 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:02:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 13:02:21,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:02:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:02:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -430904096, now seen corresponding path program 1 times [2022-07-12 13:02:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:02:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698717043] [2022-07-12 13:02:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:02:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:02:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:02:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:02:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:02:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:02:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:02:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:02:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:02:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:02:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 13:02:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:02:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 13:02:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-12 13:02:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:02:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:02:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 13:02:22,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:02:22,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698717043] [2022-07-12 13:02:22,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698717043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:02:22,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:02:22,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 13:02:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387370578] [2022-07-12 13:02:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:02:22,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 13:02:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:02:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 13:02:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-12 13:02:22,880 INFO L87 Difference]: Start difference. First operand 32519 states and 47123 transitions. Second operand has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-12 13:02:24,910 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 [] [2022-07-12 13:02:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:02:59,074 INFO L93 Difference]: Finished difference Result 98229 states and 146160 transitions. [2022-07-12 13:02:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 13:02:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 98 [2022-07-12 13:02:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:02:59,372 INFO L225 Difference]: With dead ends: 98229 [2022-07-12 13:02:59,372 INFO L226 Difference]: Without dead ends: 65725 [2022-07-12 13:02:59,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 13:02:59,471 INFO L413 NwaCegarLoop]: 2169 mSDtfsCounter, 5698 mSDsluCounter, 18157 mSDsCounter, 0 mSdLazyCounter, 14835 mSolverCounterSat, 2628 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6077 SdHoareTripleChecker+Valid, 20326 SdHoareTripleChecker+Invalid, 17464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2628 IncrementalHoareTripleChecker+Valid, 14835 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2022-07-12 13:02:59,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6077 Valid, 20326 Invalid, 17464 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2628 Valid, 14835 Invalid, 1 Unknown, 0 Unchecked, 32.3s Time] [2022-07-12 13:02:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65725 states. [2022-07-12 13:03:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65725 to 38339. [2022-07-12 13:03:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38339 states, 27008 states have (on average 1.3634848933649288) internal successors, (36825), 27850 states have internal predecessors, (36825), 9350 states have call successors, (9350), 1976 states have call predecessors, (9350), 1980 states have return successors, (9378), 9205 states have call predecessors, (9378), 9330 states have call successors, (9378) [2022-07-12 13:03:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38339 states to 38339 states and 55553 transitions. [2022-07-12 13:03:01,386 INFO L78 Accepts]: Start accepts. Automaton has 38339 states and 55553 transitions. Word has length 98 [2022-07-12 13:03:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:03:01,387 INFO L495 AbstractCegarLoop]: Abstraction has 38339 states and 55553 transitions. [2022-07-12 13:03:01,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-12 13:03:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 38339 states and 55553 transitions. [2022-07-12 13:03:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-12 13:03:01,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:03:01,391 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:03:01,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 13:03:01,392 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:03:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:03:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1168379698, now seen corresponding path program 1 times [2022-07-12 13:03:01,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:03:01,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974869494] [2022-07-12 13:03:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:03:01,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:03:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:03:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:03:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:03:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:03:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:03:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:03:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:01,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:03:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:03:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 13:03:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:03:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 13:03:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 13:03:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:03:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 13:03:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-12 13:03:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 13:03:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:03:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974869494] [2022-07-12 13:03:02,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974869494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:03:02,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:03:02,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 13:03:02,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413911768] [2022-07-12 13:03:02,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:03:02,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 13:03:02,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:03:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 13:03:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-12 13:03:02,675 INFO L87 Difference]: Start difference. First operand 38339 states and 55553 transitions. Second operand has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-12 13:03:04,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 13:03:06,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 13:03:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:03:48,494 INFO L93 Difference]: Finished difference Result 83896 states and 123849 transitions. [2022-07-12 13:03:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 13:03:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 110 [2022-07-12 13:03:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:03:48,691 INFO L225 Difference]: With dead ends: 83896 [2022-07-12 13:03:48,692 INFO L226 Difference]: Without dead ends: 45572 [2022-07-12 13:03:48,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 13:03:48,797 INFO L413 NwaCegarLoop]: 3508 mSDtfsCounter, 3793 mSDsluCounter, 29564 mSDsCounter, 0 mSdLazyCounter, 18931 mSolverCounterSat, 1726 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4121 SdHoareTripleChecker+Valid, 33072 SdHoareTripleChecker+Invalid, 20659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1726 IncrementalHoareTripleChecker+Valid, 18931 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.1s IncrementalHoareTripleChecker+Time [2022-07-12 13:03:48,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4121 Valid, 33072 Invalid, 20659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1726 Valid, 18931 Invalid, 2 Unknown, 0 Unchecked, 42.1s Time] [2022-07-12 13:03:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45572 states. [2022-07-12 13:03:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45572 to 33462. [2022-07-12 13:03:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33462 states, 23551 states have (on average 1.3642308182242793) internal successors, (32129), 24286 states have internal predecessors, (32129), 8183 states have call successors, (8183), 1722 states have call predecessors, (8183), 1727 states have return successors, (8213), 8062 states have call predecessors, (8213), 8171 states have call successors, (8213) [2022-07-12 13:03:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33462 states to 33462 states and 48525 transitions. [2022-07-12 13:03:50,610 INFO L78 Accepts]: Start accepts. Automaton has 33462 states and 48525 transitions. Word has length 110 [2022-07-12 13:03:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:03:50,610 INFO L495 AbstractCegarLoop]: Abstraction has 33462 states and 48525 transitions. [2022-07-12 13:03:50,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-12 13:03:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 33462 states and 48525 transitions. [2022-07-12 13:03:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-12 13:03:50,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:03:50,615 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:03:50,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 13:03:50,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:03:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:03:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1791551026, now seen corresponding path program 1 times [2022-07-12 13:03:50,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:03:50,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897652721] [2022-07-12 13:03:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:03:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:03:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:03:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:03:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:03:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:03:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:03:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:03:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:03:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-12 13:03:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:03:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-12 13:03:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-12 13:03:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-12 13:03:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:03:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:03:51,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:03:51,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897652721] [2022-07-12 13:03:51,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897652721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:03:51,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:03:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 13:03:51,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762593643] [2022-07-12 13:03:51,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:03:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 13:03:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:03:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 13:03:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-12 13:03:51,242 INFO L87 Difference]: Start difference. First operand 33462 states and 48525 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-12 13:03:53,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 13:03:55,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 13:04:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:04:20,016 INFO L93 Difference]: Finished difference Result 73425 states and 108602 transitions. [2022-07-12 13:04:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 13:04:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 104 [2022-07-12 13:04:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:04:20,211 INFO L225 Difference]: With dead ends: 73425 [2022-07-12 13:04:20,211 INFO L226 Difference]: Without dead ends: 39978 [2022-07-12 13:04:20,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-12 13:04:20,296 INFO L413 NwaCegarLoop]: 2032 mSDtfsCounter, 3571 mSDsluCounter, 3581 mSDsCounter, 0 mSdLazyCounter, 9506 mSolverCounterSat, 1611 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3828 SdHoareTripleChecker+Valid, 5613 SdHoareTripleChecker+Invalid, 11119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1611 IncrementalHoareTripleChecker+Valid, 9506 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-07-12 13:04:20,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3828 Valid, 5613 Invalid, 11119 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1611 Valid, 9506 Invalid, 2 Unknown, 0 Unchecked, 26.2s Time] [2022-07-12 13:04:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39978 states. [2022-07-12 13:04:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39978 to 26578. [2022-07-12 13:04:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26578 states, 18706 states have (on average 1.363733561424142) internal successors, (25510), 19287 states have internal predecessors, (25510), 6495 states have call successors, (6495), 1374 states have call predecessors, (6495), 1376 states have return successors, (6518), 6399 states have call predecessors, (6518), 6485 states have call successors, (6518) [2022-07-12 13:04:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26578 states to 26578 states and 38523 transitions. [2022-07-12 13:04:21,823 INFO L78 Accepts]: Start accepts. Automaton has 26578 states and 38523 transitions. Word has length 104 [2022-07-12 13:04:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:04:21,824 INFO L495 AbstractCegarLoop]: Abstraction has 26578 states and 38523 transitions. [2022-07-12 13:04:21,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-12 13:04:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 26578 states and 38523 transitions. [2022-07-12 13:04:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-12 13:04:21,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:04:21,829 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:04:21,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 13:04:21,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:04:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:04:21,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1536552188, now seen corresponding path program 1 times [2022-07-12 13:04:21,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:04:21,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434538768] [2022-07-12 13:04:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:04:21,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:04:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:04:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:04:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:04:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:04:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:04:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:04:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:04:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-12 13:04:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:04:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-12 13:04:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-12 13:04:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-12 13:04:22,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:04:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434538768] [2022-07-12 13:04:22,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434538768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 13:04:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038904808] [2022-07-12 13:04:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:04:22,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 13:04:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 13:04:22,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 13:04:22,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 13:04:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 13:04:23,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 13:04:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 13:04:23,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 13:04:23,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038904808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:04:23,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 13:04:23,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-07-12 13:04:23,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003558394] [2022-07-12 13:04:23,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:04:23,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 13:04:23,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:04:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 13:04:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-07-12 13:04:23,382 INFO L87 Difference]: Start difference. First operand 26578 states and 38523 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 13:04:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 13:04:24,857 INFO L93 Difference]: Finished difference Result 27719 states and 40333 transitions. [2022-07-12 13:04:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 13:04:24,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2022-07-12 13:04:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 13:04:24,925 INFO L225 Difference]: With dead ends: 27719 [2022-07-12 13:04:24,926 INFO L226 Difference]: Without dead ends: 16188 [2022-07-12 13:04:24,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-07-12 13:04:24,965 INFO L413 NwaCegarLoop]: 2188 mSDtfsCounter, 1460 mSDsluCounter, 8177 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 10365 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 13:04:24,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 10365 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 13:04:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2022-07-12 13:04:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 15107. [2022-07-12 13:04:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15107 states, 10636 states have (on average 1.361602106054908) internal successors, (14482), 10964 states have internal predecessors, (14482), 3682 states have call successors, (3682), 787 states have call predecessors, (3682), 788 states have return successors, (3692), 3628 states have call predecessors, (3692), 3674 states have call successors, (3692) [2022-07-12 13:04:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15107 states to 15107 states and 21856 transitions. [2022-07-12 13:04:25,917 INFO L78 Accepts]: Start accepts. Automaton has 15107 states and 21856 transitions. Word has length 104 [2022-07-12 13:04:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 13:04:25,918 INFO L495 AbstractCegarLoop]: Abstraction has 15107 states and 21856 transitions. [2022-07-12 13:04:25,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 13:04:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 15107 states and 21856 transitions. [2022-07-12 13:04:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-12 13:04:25,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 13:04:25,923 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 13:04:25,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 13:04:26,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 13:04:26,140 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 13:04:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 13:04:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1756565895, now seen corresponding path program 1 times [2022-07-12 13:04:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 13:04:26,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151855481] [2022-07-12 13:04:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 13:04:26,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 13:04:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 13:04:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 13:04:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-12 13:04:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 13:04:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-12 13:04:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 13:04:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 13:04:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-12 13:04:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 13:04:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-12 13:04:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-12 13:04:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 13:04:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-12 13:04:26,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 13:04:26,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151855481] [2022-07-12 13:04:26,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151855481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 13:04:26,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 13:04:26,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 13:04:26,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980450491] [2022-07-12 13:04:26,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 13:04:26,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 13:04:26,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 13:04:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 13:04:26,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-07-12 13:04:26,658 INFO L87 Difference]: Start difference. First operand 15107 states and 21856 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 9 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-12 13:04:28,682 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 []