./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 23:26:33,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 23:26:33,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 23:26:33,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 23:26:33,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 23:26:33,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 23:26:33,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 23:26:33,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 23:26:33,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 23:26:33,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 23:26:33,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 23:26:33,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 23:26:33,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 23:26:33,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 23:26:33,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 23:26:33,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 23:26:33,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 23:26:33,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 23:26:33,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 23:26:34,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 23:26:34,001 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 23:26:34,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 23:26:34,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 23:26:34,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 23:26:34,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 23:26:34,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 23:26:34,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 23:26:34,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 23:26:34,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 23:26:34,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 23:26:34,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 23:26:34,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 23:26:34,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 23:26:34,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 23:26:34,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 23:26:34,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 23:26:34,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 23:26:34,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 23:26:34,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 23:26:34,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 23:26:34,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 23:26:34,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 23:26:34,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-13 23:26:34,053 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 23:26:34,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 23:26:34,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 23:26:34,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 23:26:34,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 23:26:34,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 23:26:34,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 23:26:34,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 23:26:34,056 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 23:26:34,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 23:26:34,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 23:26:34,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 23:26:34,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 23:26:34,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 23:26:34,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 23:26:34,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 23:26:34,058 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 23:26:34,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 23:26:34,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 23:26:34,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 23:26:34,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 23:26:34,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 23:26:34,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 23:26:34,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 23:26:34,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 23:26:34,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 23:26:34,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 23:26:34,060 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 23:26:34,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 23:26:34,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 23:26:34,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2022-07-13 23:26:34,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 23:26:34,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 23:26:34,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 23:26:34,342 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 23:26:34,343 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 23:26:34,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-13 23:26:34,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc702ac9/e56f3c3d1be341c19a01754769ef0dfd/FLAGf9f5a1092 [2022-07-13 23:26:35,108 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 23:26:35,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-13 23:26:35,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc702ac9/e56f3c3d1be341c19a01754769ef0dfd/FLAGf9f5a1092 [2022-07-13 23:26:35,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdc702ac9/e56f3c3d1be341c19a01754769ef0dfd [2022-07-13 23:26:35,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 23:26:35,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 23:26:35,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 23:26:35,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 23:26:35,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 23:26:35,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:35" (1/1) ... [2022-07-13 23:26:35,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5465c7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:35, skipping insertion in model container [2022-07-13 23:26:35,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:35" (1/1) ... [2022-07-13 23:26:35,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 23:26:35,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 23:26:36,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-07-13 23:26:36,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 23:26:36,793 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 23:26:37,058 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-07-13 23:26:37,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 23:26:37,104 INFO L208 MainTranslator]: Completed translation [2022-07-13 23:26:37,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37 WrapperNode [2022-07-13 23:26:37,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 23:26:37,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 23:26:37,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 23:26:37,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 23:26:37,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,284 INFO L137 Inliner]: procedures = 191, calls = 1268, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3442 [2022-07-13 23:26:37,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 23:26:37,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 23:26:37,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 23:26:37,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 23:26:37,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 23:26:37,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 23:26:37,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 23:26:37,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 23:26:37,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (1/1) ... [2022-07-13 23:26:37,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 23:26:37,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 23:26:37,489 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) [2022-07-13 23:26:37,519 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 [2022-07-13 23:26:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-13 23:26:37,539 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-13 23:26:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-13 23:26:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-13 23:26:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-13 23:26:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-13 23:26:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-13 23:26:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-13 23:26:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-13 23:26:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 23:26:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-13 23:26:37,541 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-13 23:26:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-13 23:26:37,541 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-13 23:26:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-13 23:26:37,541 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-13 23:26:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-13 23:26:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-13 23:26:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-13 23:26:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-13 23:26:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-13 23:26:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-13 23:26:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-13 23:26:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-13 23:26:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-13 23:26:37,595 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-13 23:26:37,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-07-13 23:26:37,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-07-13 23:26:37,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-13 23:26:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-13 23:26:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-13 23:26:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-13 23:26:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-13 23:26:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-13 23:26:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-13 23:26:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-13 23:26:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-13 23:26:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-13 23:26:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 23:26:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-13 23:26:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-13 23:26:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-13 23:26:37,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-13 23:26:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-13 23:26:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-13 23:26:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-07-13 23:26:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-13 23:26:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-13 23:26:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 23:26:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-13 23:26:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-13 23:26:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-13 23:26:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-13 23:26:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-13 23:26:37,598 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-13 23:26:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-13 23:26:37,599 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-13 23:26:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 23:26:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 23:26:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-13 23:26:37,599 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-13 23:26:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-13 23:26:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-13 23:26:37,601 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-13 23:26:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-13 23:26:37,601 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-13 23:26:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 23:26:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-13 23:26:37,602 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-13 23:26:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-13 23:26:37,602 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-13 23:26:37,602 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-13 23:26:37,603 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-13 23:26:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-13 23:26:37,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-13 23:26:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-13 23:26:37,604 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-13 23:26:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-13 23:26:37,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-13 23:26:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-13 23:26:37,604 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-13 23:26:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-13 23:26:37,605 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-13 23:26:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-13 23:26:37,605 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-13 23:26:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-13 23:26:37,606 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-13 23:26:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 23:26:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-13 23:26:37,606 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-13 23:26:37,607 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-13 23:26:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-13 23:26:37,607 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-13 23:26:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-13 23:26:37,607 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-13 23:26:37,607 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-13 23:26:37,607 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-13 23:26:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-13 23:26:37,608 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-13 23:26:37,608 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-13 23:26:37,608 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-13 23:26:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-13 23:26:37,609 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-13 23:26:37,609 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-13 23:26:37,610 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-13 23:26:37,612 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-13 23:26:37,613 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-13 23:26:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-13 23:26:37,613 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-13 23:26:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-13 23:26:37,614 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-13 23:26:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-13 23:26:37,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-13 23:26:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-13 23:26:37,615 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-13 23:26:37,616 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-13 23:26:37,616 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-13 23:26:37,616 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-13 23:26:37,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-13 23:26:37,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-13 23:26:37,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-13 23:26:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 23:26:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-07-13 23:26:37,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-07-13 23:26:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-13 23:26:37,617 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-13 23:26:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-13 23:26:37,617 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-13 23:26:37,618 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-13 23:26:37,618 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-13 23:26:37,618 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-13 23:26:37,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 23:26:37,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 23:26:37,618 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-13 23:26:37,618 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-13 23:26:38,202 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 23:26:38,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 23:26:53,038 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 23:26:53,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 23:26:53,061 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 23:26:53,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:53 BoogieIcfgContainer [2022-07-13 23:26:53,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 23:26:53,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 23:26:53,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 23:26:53,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 23:26:53,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:26:35" (1/3) ... [2022-07-13 23:26:53,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5146db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:53, skipping insertion in model container [2022-07-13 23:26:53,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:37" (2/3) ... [2022-07-13 23:26:53,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5146db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:53, skipping insertion in model container [2022-07-13 23:26:53,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:53" (3/3) ... [2022-07-13 23:26:53,073 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-13 23:26:53,086 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 23:26:53,087 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 23:26:53,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 23:26:53,197 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@5cc743eb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37350df [2022-07-13 23:26:53,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 23:26:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2022-07-13 23:26:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 23:26:53,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:26:53,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:26:53,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:26:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:26:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1087819150, now seen corresponding path program 1 times [2022-07-13 23:26:53,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:26:53,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504762301] [2022-07-13 23:26:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:26:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:26:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:26:53,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:26:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:26:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:26:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:26:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:26:53,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:26:53,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504762301] [2022-07-13 23:26:53,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504762301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:26:53,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:26:53,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:26:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036100241] [2022-07-13 23:26:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:26:53,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:26:53,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:26:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:26:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:26:53,988 INFO L87 Difference]: Start difference. First operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:26:56,042 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 [] [2022-07-13 23:27:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:02,049 INFO L93 Difference]: Finished difference Result 4165 states and 6365 transitions. [2022-07-13 23:27:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:27:02,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-13 23:27:02,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:02,096 INFO L225 Difference]: With dead ends: 4165 [2022-07-13 23:27:02,096 INFO L226 Difference]: Without dead ends: 2887 [2022-07-13 23:27:02,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:27:02,115 INFO L413 NwaCegarLoop]: 2053 mSDtfsCounter, 3067 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 923 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:02,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 4239 Invalid, 2316 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [923 Valid, 1392 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2022-07-13 23:27:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-13 23:27:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2330. [2022-07-13 23:27:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1616 states have (on average 1.3545792079207921) internal successors, (2189), 1674 states have internal predecessors, (2189), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2022-07-13 23:27:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3366 transitions. [2022-07-13 23:27:02,376 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3366 transitions. Word has length 17 [2022-07-13 23:27:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:02,377 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3366 transitions. [2022-07-13 23:27:02,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:27:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3366 transitions. [2022-07-13 23:27:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 23:27:02,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:02,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:02,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 23:27:02,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash 636307650, now seen corresponding path program 1 times [2022-07-13 23:27:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:02,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129896915] [2022-07-13 23:27:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:02,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:02,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:27:02,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129896915] [2022-07-13 23:27:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129896915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:02,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:02,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:27:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181965473] [2022-07-13 23:27:02,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:02,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:27:02,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:02,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:27:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:27:02,685 INFO L87 Difference]: Start difference. First operand 2330 states and 3366 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:27:04,719 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 [] [2022-07-13 23:27:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:11,660 INFO L93 Difference]: Finished difference Result 6873 states and 10148 transitions. [2022-07-13 23:27:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:27:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-07-13 23:27:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:11,707 INFO L225 Difference]: With dead ends: 6873 [2022-07-13 23:27:11,707 INFO L226 Difference]: Without dead ends: 5734 [2022-07-13 23:27:11,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:27:11,729 INFO L413 NwaCegarLoop]: 3008 mSDtfsCounter, 2517 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 770 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 5467 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:11,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2811 Valid, 5467 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 1424 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-07-13 23:27:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2022-07-13 23:27:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4620. [2022-07-13 23:27:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 3209 states have (on average 1.3549392334060455) internal successors, (4348), 3319 states have internal predecessors, (4348), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2022-07-13 23:27:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 6678 transitions. [2022-07-13 23:27:11,938 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 6678 transitions. Word has length 18 [2022-07-13 23:27:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:11,939 INFO L495 AbstractCegarLoop]: Abstraction has 4620 states and 6678 transitions. [2022-07-13 23:27:11,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:27:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 6678 transitions. [2022-07-13 23:27:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 23:27:11,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:11,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:11,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 23:27:11,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 312341314, now seen corresponding path program 1 times [2022-07-13 23:27:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:11,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196023582] [2022-07-13 23:27:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:12,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:12,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 23:27:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:12,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:27:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:27:12,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196023582] [2022-07-13 23:27:12,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196023582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:12,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:12,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:27:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591897133] [2022-07-13 23:27:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:27:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:27:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:27:12,311 INFO L87 Difference]: Start difference. First operand 4620 states and 6678 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 23:27:14,342 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 [] [2022-07-13 23:27:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:19,833 INFO L93 Difference]: Finished difference Result 12536 states and 18549 transitions. [2022-07-13 23:27:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:27:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-13 23:27:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:19,919 INFO L225 Difference]: With dead ends: 12536 [2022-07-13 23:27:19,919 INFO L226 Difference]: Without dead ends: 11382 [2022-07-13 23:27:19,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:27:19,937 INFO L413 NwaCegarLoop]: 2293 mSDtfsCounter, 2930 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 928 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3219 SdHoareTripleChecker+Valid, 4284 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:19,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3219 Valid, 4284 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 1414 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2022-07-13 23:27:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-07-13 23:27:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 8047. [2022-07-13 23:27:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8047 states, 5595 states have (on average 1.3549597855227882) internal successors, (7581), 5785 states have internal predecessors, (7581), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2022-07-13 23:27:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8047 states to 8047 states and 11633 transitions. [2022-07-13 23:27:20,354 INFO L78 Accepts]: Start accepts. Automaton has 8047 states and 11633 transitions. Word has length 36 [2022-07-13 23:27:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:20,355 INFO L495 AbstractCegarLoop]: Abstraction has 8047 states and 11633 transitions. [2022-07-13 23:27:20,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 23:27:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 8047 states and 11633 transitions. [2022-07-13 23:27:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 23:27:20,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:20,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:20,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 23:27:20,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:20,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:20,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1062377866, now seen corresponding path program 1 times [2022-07-13 23:27:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:20,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560377853] [2022-07-13 23:27:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:20,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:20,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:27:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:21,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:27:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:27:21,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:21,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560377853] [2022-07-13 23:27:21,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560377853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:21,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:21,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 23:27:21,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53712650] [2022-07-13 23:27:21,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 23:27:21,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 23:27:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-07-13 23:27:21,395 INFO L87 Difference]: Start difference. First operand 8047 states and 11633 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 23:27:23,430 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 [] [2022-07-13 23:27:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:55,353 INFO L93 Difference]: Finished difference Result 23274 states and 34407 transitions. [2022-07-13 23:27:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 23:27:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-13 23:27:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:55,457 INFO L225 Difference]: With dead ends: 23274 [2022-07-13 23:27:55,458 INFO L226 Difference]: Without dead ends: 17598 [2022-07-13 23:27:55,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-13 23:27:55,490 INFO L413 NwaCegarLoop]: 2559 mSDtfsCounter, 3598 mSDsluCounter, 19708 mSDsCounter, 0 mSdLazyCounter, 13141 mSolverCounterSat, 1517 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3897 SdHoareTripleChecker+Valid, 22267 SdHoareTripleChecker+Invalid, 14659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 13141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.4s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:55,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3897 Valid, 22267 Invalid, 14659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1517 Valid, 13141 Invalid, 1 Unknown, 0 Unchecked, 32.4s Time] [2022-07-13 23:27:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17598 states. [2022-07-13 23:27:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17598 to 11508. [2022-07-13 23:27:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 7999 states have (on average 1.354544318039755) internal successors, (10835), 8269 states have internal predecessors, (10835), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2022-07-13 23:27:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 16633 transitions. [2022-07-13 23:27:56,095 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 16633 transitions. Word has length 38 [2022-07-13 23:27:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:56,096 INFO L495 AbstractCegarLoop]: Abstraction has 11508 states and 16633 transitions. [2022-07-13 23:27:56,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 23:27:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 16633 transitions. [2022-07-13 23:27:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 23:27:56,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:56,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 23:27:56,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash -479641513, now seen corresponding path program 1 times [2022-07-13 23:27:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:56,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366509951] [2022-07-13 23:27:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:56,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:56,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 23:27:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 23:27:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:57,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:27:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 23:27:57,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:57,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366509951] [2022-07-13 23:27:57,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366509951] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:57,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:57,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 23:27:57,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607873401] [2022-07-13 23:27:57,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:57,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 23:27:57,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 23:27:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-13 23:27:57,355 INFO L87 Difference]: Start difference. First operand 11508 states and 16633 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 23:27:59,389 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 [] [2022-07-13 23:28:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:28:36,415 INFO L93 Difference]: Finished difference Result 18438 states and 27352 transitions. [2022-07-13 23:28:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 23:28:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2022-07-13 23:28:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:28:36,508 INFO L225 Difference]: With dead ends: 18438 [2022-07-13 23:28:36,508 INFO L226 Difference]: Without dead ends: 17321 [2022-07-13 23:28:36,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 23:28:36,526 INFO L413 NwaCegarLoop]: 2202 mSDtfsCounter, 4361 mSDsluCounter, 17878 mSDsCounter, 0 mSdLazyCounter, 14133 mSolverCounterSat, 1911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4649 SdHoareTripleChecker+Valid, 20080 SdHoareTripleChecker+Invalid, 16045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1911 IncrementalHoareTripleChecker+Valid, 14133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time [2022-07-13 23:28:36,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4649 Valid, 20080 Invalid, 16045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1911 Valid, 14133 Invalid, 1 Unknown, 0 Unchecked, 36.8s Time] [2022-07-13 23:28:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17321 states. [2022-07-13 23:28:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17321 to 10399. [2022-07-13 23:28:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7231 states have (on average 1.3536163739455125) internal successors, (9788), 7475 states have internal predecessors, (9788), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2022-07-13 23:28:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 15016 transitions. [2022-07-13 23:28:37,217 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 15016 transitions. Word has length 45 [2022-07-13 23:28:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:28:37,218 INFO L495 AbstractCegarLoop]: Abstraction has 10399 states and 15016 transitions. [2022-07-13 23:28:37,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 23:28:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 15016 transitions. [2022-07-13 23:28:37,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 23:28:37,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:28:37,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:28:37,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 23:28:37,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:28:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:28:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash 80113123, now seen corresponding path program 1 times [2022-07-13 23:28:37,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:28:37,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906665351] [2022-07-13 23:28:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:28:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:28:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:37,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:28:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:28:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:28:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:37,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:28:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:37,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:28:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:37,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 23:28:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:28:37,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:28:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906665351] [2022-07-13 23:28:37,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906665351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:28:37,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:28:37,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:28:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534883080] [2022-07-13 23:28:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:28:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:28:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:28:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:28:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:28:37,494 INFO L87 Difference]: Start difference. First operand 10399 states and 15016 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 23:28:39,526 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 [] [2022-07-13 23:28:41,595 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 [] [2022-07-13 23:28:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:28:46,520 INFO L93 Difference]: Finished difference Result 15673 states and 23232 transitions. [2022-07-13 23:28:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:28:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2022-07-13 23:28:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:28:46,619 INFO L225 Difference]: With dead ends: 15673 [2022-07-13 23:28:46,619 INFO L226 Difference]: Without dead ends: 15652 [2022-07-13 23:28:46,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:28:46,636 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 2419 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 670 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 5766 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-07-13 23:28:46,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 5766 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1441 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2022-07-13 23:28:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2022-07-13 23:28:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 8137. [2022-07-13 23:28:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 5661 states have (on average 1.3511747041158806) internal successors, (7649), 5853 states have internal predecessors, (7649), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-13 23:28:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 11731 transitions. [2022-07-13 23:28:47,289 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 11731 transitions. Word has length 52 [2022-07-13 23:28:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:28:47,289 INFO L495 AbstractCegarLoop]: Abstraction has 8137 states and 11731 transitions. [2022-07-13 23:28:47,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 23:28:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 11731 transitions. [2022-07-13 23:28:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 23:28:47,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:28:47,291 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 23:28:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 23:28:47,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:28:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:28:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 139061074, now seen corresponding path program 1 times [2022-07-13 23:28:47,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:28:47,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102206146] [2022-07-13 23:28:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:28:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:28:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:28:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:28:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 23:28:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 23:28:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:28:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 23:28:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 23:28:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 23:28:48,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:28:48,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102206146] [2022-07-13 23:28:48,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102206146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:28:48,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:28:48,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 23:28:48,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138396019] [2022-07-13 23:28:48,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:28:48,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 23:28:48,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:28:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 23:28:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-13 23:28:48,415 INFO L87 Difference]: Start difference. First operand 8137 states and 11731 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 23:28:50,447 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 [] [2022-07-13 23:28:52,492 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 [] [2022-07-13 23:29:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:29:19,030 INFO L93 Difference]: Finished difference Result 13968 states and 20655 transitions. [2022-07-13 23:29:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 23:29:19,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-07-13 23:29:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:29:19,106 INFO L225 Difference]: With dead ends: 13968 [2022-07-13 23:29:19,107 INFO L226 Difference]: Without dead ends: 12854 [2022-07-13 23:29:19,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-07-13 23:29:19,123 INFO L413 NwaCegarLoop]: 3052 mSDtfsCounter, 3169 mSDsluCounter, 21061 mSDsCounter, 0 mSdLazyCounter, 12985 mSolverCounterSat, 1279 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 24113 SdHoareTripleChecker+Invalid, 14266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 12985 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2022-07-13 23:29:19,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3466 Valid, 24113 Invalid, 14266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1279 Valid, 12985 Invalid, 2 Unknown, 0 Unchecked, 28.9s Time] [2022-07-13 23:29:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12854 states. [2022-07-13 23:29:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12854 to 8135. [2022-07-13 23:29:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 5659 states have (on average 1.351122106379219) internal successors, (7646), 5851 states have internal predecessors, (7646), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-13 23:29:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 11728 transitions. [2022-07-13 23:29:19,887 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 11728 transitions. Word has length 53 [2022-07-13 23:29:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:29:19,887 INFO L495 AbstractCegarLoop]: Abstraction has 8135 states and 11728 transitions. [2022-07-13 23:29:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 23:29:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 11728 transitions. [2022-07-13 23:29:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 23:29:19,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:29:19,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:29:19,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 23:29:19,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:29:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:29:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -538213409, now seen corresponding path program 1 times [2022-07-13 23:29:19,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:29:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575360665] [2022-07-13 23:29:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:29:19,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:29:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:20,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:29:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:29:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 23:29:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:20,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 23:29:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:21,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:29:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:21,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 23:29:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 23:29:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 23:29:21,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:29:21,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575360665] [2022-07-13 23:29:21,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575360665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:29:21,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:29:21,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 23:29:21,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605427816] [2022-07-13 23:29:21,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:29:21,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 23:29:21,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:29:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 23:29:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-13 23:29:21,245 INFO L87 Difference]: Start difference. First operand 8135 states and 11728 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 23:29:23,280 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 [] [2022-07-13 23:29:25,354 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 [] [2022-07-13 23:29:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:29:52,056 INFO L93 Difference]: Finished difference Result 11758 states and 17237 transitions. [2022-07-13 23:29:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 23:29:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2022-07-13 23:29:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:29:52,090 INFO L225 Difference]: With dead ends: 11758 [2022-07-13 23:29:52,090 INFO L226 Difference]: Without dead ends: 7187 [2022-07-13 23:29:52,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-07-13 23:29:52,113 INFO L413 NwaCegarLoop]: 1679 mSDtfsCounter, 961 mSDsluCounter, 13966 mSDsCounter, 0 mSdLazyCounter, 8656 mSolverCounterSat, 372 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 15645 SdHoareTripleChecker+Invalid, 9030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 8656 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2022-07-13 23:29:52,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 15645 Invalid, 9030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [372 Valid, 8656 Invalid, 2 Unknown, 0 Unchecked, 29.1s Time] [2022-07-13 23:29:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2022-07-13 23:29:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 5809. [2022-07-13 23:29:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4038 states have (on average 1.3506686478454681) internal successors, (5454), 4173 states have internal predecessors, (5454), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2022-07-13 23:29:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8374 transitions. [2022-07-13 23:29:52,645 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8374 transitions. Word has length 56 [2022-07-13 23:29:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:29:52,646 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 8374 transitions. [2022-07-13 23:29:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 23:29:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8374 transitions. [2022-07-13 23:29:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 23:29:52,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:29:52,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:29:52,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 23:29:52,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:29:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:29:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash 762935669, now seen corresponding path program 1 times [2022-07-13 23:29:52,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:29:52,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119393095] [2022-07-13 23:29:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:29:52,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:29:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:29:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:29:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:29:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:29:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:29:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 23:29:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-13 23:29:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:29:53,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:29:53,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119393095] [2022-07-13 23:29:53,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119393095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:29:53,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:29:53,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 23:29:53,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355864417] [2022-07-13 23:29:53,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:29:53,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 23:29:53,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:29:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 23:29:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 23:29:53,182 INFO L87 Difference]: Start difference. First operand 5809 states and 8374 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:29:55,215 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 [] [2022-07-13 23:29:57,259 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 [] [2022-07-13 23:30:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:30:24,283 INFO L93 Difference]: Finished difference Result 9365 states and 13991 transitions. [2022-07-13 23:30:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 23:30:24,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2022-07-13 23:30:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:30:24,320 INFO L225 Difference]: With dead ends: 9365 [2022-07-13 23:30:24,320 INFO L226 Difference]: Without dead ends: 8228 [2022-07-13 23:30:24,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-13 23:30:24,331 INFO L413 NwaCegarLoop]: 2232 mSDtfsCounter, 3300 mSDsluCounter, 3636 mSDsCounter, 0 mSdLazyCounter, 7874 mSolverCounterSat, 1861 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3536 SdHoareTripleChecker+Valid, 5868 SdHoareTripleChecker+Invalid, 9737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1861 IncrementalHoareTripleChecker+Valid, 7874 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-07-13 23:30:24,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3536 Valid, 5868 Invalid, 9737 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1861 Valid, 7874 Invalid, 2 Unknown, 0 Unchecked, 29.9s Time] [2022-07-13 23:30:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2022-07-13 23:30:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 5798. [2022-07-13 23:30:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5798 states, 4032 states have (on average 1.3504464285714286) internal successors, (5445), 4165 states have internal predecessors, (5445), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-13 23:30:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 8356 transitions. [2022-07-13 23:30:24,947 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 8356 transitions. Word has length 64 [2022-07-13 23:30:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:30:24,948 INFO L495 AbstractCegarLoop]: Abstraction has 5798 states and 8356 transitions. [2022-07-13 23:30:24,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:30:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 8356 transitions. [2022-07-13 23:30:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 23:30:24,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:30:24,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:30:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 23:30:24,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:30:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:30:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1307494641, now seen corresponding path program 1 times [2022-07-13 23:30:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:30:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688096951] [2022-07-13 23:30:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:30:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:30:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:25,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:30:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:25,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:30:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:25,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:30:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:25,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:30:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:25,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:30:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:25,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 23:30:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 23:30:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:30:25,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688096951] [2022-07-13 23:30:25,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688096951] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:30:25,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:30:25,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 23:30:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642653944] [2022-07-13 23:30:25,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:30:25,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 23:30:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:30:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 23:30:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 23:30:25,284 INFO L87 Difference]: Start difference. First operand 5798 states and 8356 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 23:30:27,323 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 []