./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 00:02:23,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 00:02:23,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 00:02:23,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 00:02:23,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 00:02:23,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 00:02:23,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 00:02:23,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 00:02:23,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 00:02:23,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 00:02:23,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 00:02:23,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 00:02:23,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 00:02:23,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 00:02:23,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 00:02:23,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 00:02:23,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 00:02:23,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 00:02:23,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 00:02:23,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 00:02:23,290 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 00:02:23,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 00:02:23,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 00:02:23,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 00:02:23,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 00:02:23,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 00:02:23,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 00:02:23,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 00:02:23,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 00:02:23,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 00:02:23,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 00:02:23,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 00:02:23,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 00:02:23,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 00:02:23,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 00:02:23,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 00:02:23,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 00:02:23,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 00:02:23,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 00:02:23,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 00:02:23,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 00:02:23,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 00:02:23,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-20 00:02:23,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 00:02:23,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 00:02:23,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 00:02:23,349 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 00:02:23,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 00:02:23,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 00:02:23,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 00:02:23,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 00:02:23,351 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 00:02:23,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 00:02:23,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 00:02:23,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 00:02:23,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 00:02:23,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 00:02:23,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 00:02:23,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 00:02:23,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 00:02:23,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 00:02:23,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 00:02:23,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 00:02:23,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 00:02:23,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 00:02:23,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 00:02:23,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 00:02:23,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 00:02:23,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 00:02:23,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 00:02:23,357 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 00:02:23,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 00:02:23,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 00:02:23,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2022-07-20 00:02:23,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 00:02:23,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 00:02:23,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 00:02:23,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 00:02:23,670 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 00:02:23,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2022-07-20 00:02:23,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bffa4983/9b4f077abb3d487b9b9766e0cd34ccfe/FLAG11c34b864 [2022-07-20 00:02:24,365 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 00:02:24,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2022-07-20 00:02:24,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bffa4983/9b4f077abb3d487b9b9766e0cd34ccfe/FLAG11c34b864 [2022-07-20 00:02:24,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bffa4983/9b4f077abb3d487b9b9766e0cd34ccfe [2022-07-20 00:02:24,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 00:02:24,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 00:02:24,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 00:02:24,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 00:02:24,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 00:02:24,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:24" (1/1) ... [2022-07-20 00:02:24,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2464505f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:24, skipping insertion in model container [2022-07-20 00:02:24,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:24" (1/1) ... [2022-07-20 00:02:24,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 00:02:24,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 00:02:25,267 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2022-07-20 00:02:25,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 00:02:25,739 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 00:02:25,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2022-07-20 00:02:26,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 00:02:26,097 INFO L208 MainTranslator]: Completed translation [2022-07-20 00:02:26,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26 WrapperNode [2022-07-20 00:02:26,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 00:02:26,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 00:02:26,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 00:02:26,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 00:02:26,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,348 INFO L137 Inliner]: procedures = 203, calls = 1280, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 3595 [2022-07-20 00:02:26,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 00:02:26,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 00:02:26,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 00:02:26,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 00:02:26,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 00:02:26,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 00:02:26,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 00:02:26,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 00:02:26,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (1/1) ... [2022-07-20 00:02:26,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 00:02:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 00:02:26,604 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) [2022-07-20 00:02:26,617 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 [2022-07-20 00:02:26,653 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-20 00:02:26,653 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-20 00:02:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2022-07-20 00:02:26,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2022-07-20 00:02:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-20 00:02:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-20 00:02:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-20 00:02:26,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-20 00:02:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-20 00:02:26,655 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-20 00:02:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-20 00:02:26,655 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-20 00:02:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-20 00:02:26,655 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-20 00:02:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-20 00:02:26,656 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-20 00:02:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-20 00:02:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-20 00:02:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-20 00:02:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-20 00:02:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-20 00:02:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-20 00:02:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-20 00:02:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-20 00:02:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-20 00:02:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-20 00:02:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-20 00:02:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-20 00:02:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 00:02:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-20 00:02:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-20 00:02:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-20 00:02:26,716 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-20 00:02:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-20 00:02:26,717 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-20 00:02:26,717 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-20 00:02:26,717 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-20 00:02:26,717 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-20 00:02:26,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-20 00:02:26,717 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-20 00:02:26,717 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-20 00:02:26,718 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-20 00:02:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 00:02:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 00:02:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-20 00:02:26,718 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-20 00:02:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-20 00:02:26,718 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-20 00:02:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-20 00:02:26,718 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-20 00:02:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-20 00:02:26,718 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-20 00:02:26,718 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-20 00:02:26,718 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-20 00:02:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-20 00:02:26,719 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-20 00:02:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-20 00:02:26,719 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-20 00:02:26,719 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-20 00:02:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-20 00:02:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-20 00:02:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-20 00:02:26,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-20 00:02:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-20 00:02:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-20 00:02:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-20 00:02:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-20 00:02:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-20 00:02:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-20 00:02:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-20 00:02:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-20 00:02:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-20 00:02:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 00:02:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-20 00:02:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-20 00:02:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-20 00:02:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-20 00:02:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-20 00:02:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-20 00:02:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-20 00:02:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-20 00:02:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 00:02:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-20 00:02:26,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-20 00:02:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-20 00:02:26,726 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-20 00:02:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-20 00:02:26,726 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-20 00:02:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-20 00:02:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-20 00:02:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2022-07-20 00:02:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2022-07-20 00:02:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 00:02:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-20 00:02:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-20 00:02:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-20 00:02:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-20 00:02:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-20 00:02:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-20 00:02:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-20 00:02:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-20 00:02:26,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 00:02:26,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 00:02:26,729 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-20 00:02:26,730 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-20 00:02:26,732 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-20 00:02:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-20 00:02:26,733 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-20 00:02:26,733 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-20 00:02:26,733 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-20 00:02:26,734 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-20 00:02:26,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-20 00:02:26,734 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-20 00:02:26,734 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-20 00:02:26,735 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-20 00:02:26,735 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-20 00:02:26,735 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-20 00:02:26,736 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-20 00:02:26,736 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-20 00:02:26,736 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-20 00:02:26,736 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-20 00:02:26,736 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-20 00:02:26,736 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-20 00:02:26,737 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-20 00:02:26,737 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-20 00:02:26,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-20 00:02:26,737 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-20 00:02:26,737 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-20 00:02:26,737 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-20 00:02:26,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-20 00:02:26,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-20 00:02:26,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-20 00:02:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 00:02:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-20 00:02:26,738 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-20 00:02:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 00:02:26,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 00:02:26,738 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-20 00:02:26,739 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-20 00:02:27,312 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 00:02:27,317 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 00:02:27,550 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-20 00:02:42,451 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 00:02:42,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 00:02:42,476 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-20 00:02:42,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:42 BoogieIcfgContainer [2022-07-20 00:02:42,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 00:02:42,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 00:02:42,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 00:02:42,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 00:02:42,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:02:24" (1/3) ... [2022-07-20 00:02:42,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224bb38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:42, skipping insertion in model container [2022-07-20 00:02:42,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:26" (2/3) ... [2022-07-20 00:02:42,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224bb38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:42, skipping insertion in model container [2022-07-20 00:02:42,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:42" (3/3) ... [2022-07-20 00:02:42,490 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2022-07-20 00:02:42,504 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 00:02:42,504 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 00:02:42,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 00:02:42,600 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@98180af, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4dbae3b3 [2022-07-20 00:02:42,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 00:02:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 1328 states, 937 states have (on average 1.4130202774813234) internal successors, (1324), 980 states have internal predecessors, (1324), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) [2022-07-20 00:02:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 00:02:42,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:02:42,628 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:02:42,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:02:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:02:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash -826194177, now seen corresponding path program 1 times [2022-07-20 00:02:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:02:42,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738550774] [2022-07-20 00:02:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:02:42,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:02:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:02:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:02:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:02:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:02:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:02:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:02:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-20 00:02:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 00:02:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 00:02:43,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:02:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738550774] [2022-07-20 00:02:43,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738550774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:02:43,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:02:43,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 00:02:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858935226] [2022-07-20 00:02:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:02:43,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 00:02:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:02:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 00:02:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 00:02:43,464 INFO L87 Difference]: Start difference. First operand has 1328 states, 937 states have (on average 1.4130202774813234) internal successors, (1324), 980 states have internal predecessors, (1324), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 00:02:45,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:02:47,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:02:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:02:54,957 INFO L93 Difference]: Finished difference Result 4152 states and 6323 transitions. [2022-07-20 00:02:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 00:02:54,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2022-07-20 00:02:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:02:55,001 INFO L225 Difference]: With dead ends: 4152 [2022-07-20 00:02:55,002 INFO L226 Difference]: Without dead ends: 2812 [2022-07-20 00:02:55,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 00:02:55,026 INFO L413 NwaCegarLoop]: 2106 mSDtfsCounter, 2405 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 871 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 4098 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 871 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-07-20 00:02:55,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2677 Valid, 4098 Invalid, 2485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [871 Valid, 1612 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2022-07-20 00:02:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2022-07-20 00:02:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2406. [2022-07-20 00:02:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1688 states have (on average 1.3625592417061612) internal successors, (2300), 1748 states have internal predecessors, (2300), 592 states have call successors, (592), 126 states have call predecessors, (592), 125 states have return successors, (579), 573 states have call predecessors, (579), 579 states have call successors, (579) [2022-07-20 00:02:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3471 transitions. [2022-07-20 00:02:55,304 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3471 transitions. Word has length 58 [2022-07-20 00:02:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:02:55,307 INFO L495 AbstractCegarLoop]: Abstraction has 2406 states and 3471 transitions. [2022-07-20 00:02:55,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 00:02:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3471 transitions. [2022-07-20 00:02:55,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 00:02:55,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:02:55,318 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:02:55,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 00:02:55,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:02:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:02:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2130658151, now seen corresponding path program 1 times [2022-07-20 00:02:55,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:02:55,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469986849] [2022-07-20 00:02:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:02:55,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:02:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:02:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:02:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:02:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:02:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:02:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:02:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:02:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:02:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 00:02:55,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:02:55,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469986849] [2022-07-20 00:02:55,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469986849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:02:55,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:02:55,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 00:02:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399731258] [2022-07-20 00:02:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:02:55,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 00:02:55,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:02:55,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 00:02:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 00:02:55,814 INFO L87 Difference]: Start difference. First operand 2406 states and 3471 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 00:02:57,852 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 [] [2022-07-20 00:03:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:03:06,635 INFO L93 Difference]: Finished difference Result 6388 states and 9553 transitions. [2022-07-20 00:03:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 00:03:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2022-07-20 00:03:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:03:06,688 INFO L225 Difference]: With dead ends: 6388 [2022-07-20 00:03:06,689 INFO L226 Difference]: Without dead ends: 6364 [2022-07-20 00:03:06,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 00:03:06,697 INFO L413 NwaCegarLoop]: 1955 mSDtfsCounter, 4253 mSDsluCounter, 2188 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 1977 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4573 SdHoareTripleChecker+Valid, 4143 SdHoareTripleChecker+Invalid, 3861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1977 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-07-20 00:03:06,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4573 Valid, 4143 Invalid, 3861 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1977 Valid, 1883 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2022-07-20 00:03:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6364 states. [2022-07-20 00:03:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6364 to 4728. [2022-07-20 00:03:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 3325 states have (on average 1.3621052631578947) internal successors, (4529), 3433 states have internal predecessors, (4529), 1158 states have call successors, (1158), 247 states have call predecessors, (1158), 244 states have return successors, (1146), 1131 states have call predecessors, (1146), 1146 states have call successors, (1146) [2022-07-20 00:03:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 6833 transitions. [2022-07-20 00:03:06,935 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 6833 transitions. Word has length 56 [2022-07-20 00:03:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:03:06,936 INFO L495 AbstractCegarLoop]: Abstraction has 4728 states and 6833 transitions. [2022-07-20 00:03:06,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 00:03:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 6833 transitions. [2022-07-20 00:03:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 00:03:06,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:03:06,938 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:03:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 00:03:06,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:03:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:03:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1626874934, now seen corresponding path program 1 times [2022-07-20 00:03:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:03:06,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946666354] [2022-07-20 00:03:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:03:06,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:03:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:03:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:03:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:03:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:03:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:03:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:03:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:03:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 00:03:07,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:03:07,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946666354] [2022-07-20 00:03:07,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946666354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:03:07,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:03:07,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 00:03:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343663622] [2022-07-20 00:03:07,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:03:07,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 00:03:07,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:03:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 00:03:07,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 00:03:07,323 INFO L87 Difference]: Start difference. First operand 4728 states and 6833 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 00:03:09,356 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 [] [2022-07-20 00:03:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:03:17,755 INFO L93 Difference]: Finished difference Result 17375 states and 25771 transitions. [2022-07-20 00:03:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 00:03:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2022-07-20 00:03:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:03:17,840 INFO L225 Difference]: With dead ends: 17375 [2022-07-20 00:03:17,841 INFO L226 Difference]: Without dead ends: 12662 [2022-07-20 00:03:17,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 00:03:17,869 INFO L413 NwaCegarLoop]: 2152 mSDtfsCounter, 3521 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 1108 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3838 SdHoareTripleChecker+Valid, 5094 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1108 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-07-20 00:03:17,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3838 Valid, 5094 Invalid, 3553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1108 Valid, 2444 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-07-20 00:03:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2022-07-20 00:03:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 9387. [2022-07-20 00:03:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 6610 states have (on average 1.3629349470499244) internal successors, (9009), 6818 states have internal predecessors, (9009), 2294 states have call successors, (2294), 487 states have call predecessors, (2294), 482 states have return successors, (2276), 2249 states have call predecessors, (2276), 2276 states have call successors, (2276) [2022-07-20 00:03:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 13579 transitions. [2022-07-20 00:03:18,329 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 13579 transitions. Word has length 57 [2022-07-20 00:03:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:03:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 9387 states and 13579 transitions. [2022-07-20 00:03:18,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 00:03:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 13579 transitions. [2022-07-20 00:03:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 00:03:18,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:03:18,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:03:18,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 00:03:18,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:03:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:03:18,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1151289838, now seen corresponding path program 1 times [2022-07-20 00:03:18,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:03:18,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308768152] [2022-07-20 00:03:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:03:18,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:03:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:03:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:03:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:03:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:03:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:03:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:03:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:03:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 00:03:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:03:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 00:03:18,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:03:18,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308768152] [2022-07-20 00:03:18,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308768152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:03:18,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:03:18,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 00:03:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839384198] [2022-07-20 00:03:18,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:03:18,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 00:03:18,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:03:18,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 00:03:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 00:03:18,698 INFO L87 Difference]: Start difference. First operand 9387 states and 13579 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 00:03:20,729 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 [] [2022-07-20 00:03:22,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:03:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:03:32,242 INFO L93 Difference]: Finished difference Result 34642 states and 51390 transitions. [2022-07-20 00:03:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 00:03:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2022-07-20 00:03:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:03:32,434 INFO L225 Difference]: With dead ends: 34642 [2022-07-20 00:03:32,434 INFO L226 Difference]: Without dead ends: 25267 [2022-07-20 00:03:32,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 00:03:32,502 INFO L413 NwaCegarLoop]: 1986 mSDtfsCounter, 3533 mSDsluCounter, 2740 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 1163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3850 SdHoareTripleChecker+Valid, 4726 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-07-20 00:03:32,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3850 Valid, 4726 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 2456 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2022-07-20 00:03:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25267 states. [2022-07-20 00:03:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25267 to 18698. [2022-07-20 00:03:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18698 states, 13181 states have (on average 1.3634018663227372) internal successors, (17971), 13585 states have internal predecessors, (17971), 4558 states have call successors, (4558), 966 states have call predecessors, (4558), 958 states have return successors, (4538), 4482 states have call predecessors, (4538), 4538 states have call successors, (4538) [2022-07-20 00:03:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18698 states to 18698 states and 27067 transitions. [2022-07-20 00:03:33,541 INFO L78 Accepts]: Start accepts. Automaton has 18698 states and 27067 transitions. Word has length 75 [2022-07-20 00:03:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:03:33,543 INFO L495 AbstractCegarLoop]: Abstraction has 18698 states and 27067 transitions. [2022-07-20 00:03:33,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 00:03:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18698 states and 27067 transitions. [2022-07-20 00:03:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 00:03:33,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:03:33,547 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:03:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 00:03:33,547 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:03:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:03:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1212646870, now seen corresponding path program 1 times [2022-07-20 00:03:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:03:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757353415] [2022-07-20 00:03:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:03:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:03:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:03:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:03:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:03:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:03:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:03:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:03:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:03:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-20 00:03:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:03:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:03:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 00:03:34,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:03:34,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757353415] [2022-07-20 00:03:34,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757353415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:03:34,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:03:34,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-20 00:03:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109314445] [2022-07-20 00:03:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:03:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 00:03:34,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:03:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 00:03:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-20 00:03:34,843 INFO L87 Difference]: Start difference. First operand 18698 states and 27067 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-20 00:03:36,878 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 [] [2022-07-20 00:04:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:04:08,463 INFO L93 Difference]: Finished difference Result 65778 states and 98173 transitions. [2022-07-20 00:04:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 00:04:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-07-20 00:04:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:04:08,870 INFO L225 Difference]: With dead ends: 65778 [2022-07-20 00:04:08,870 INFO L226 Difference]: Without dead ends: 47095 [2022-07-20 00:04:08,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 00:04:08,957 INFO L413 NwaCegarLoop]: 2192 mSDtfsCounter, 5207 mSDsluCounter, 16529 mSDsCounter, 0 mSdLazyCounter, 13576 mSolverCounterSat, 2380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5593 SdHoareTripleChecker+Valid, 18721 SdHoareTripleChecker+Invalid, 15957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2380 IncrementalHoareTripleChecker+Valid, 13576 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-07-20 00:04:08,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5593 Valid, 18721 Invalid, 15957 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2380 Valid, 13576 Invalid, 1 Unknown, 0 Unchecked, 31.2s Time] [2022-07-20 00:04:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47095 states. [2022-07-20 00:04:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47095 to 32538. [2022-07-20 00:04:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32538 states, 22927 states have (on average 1.3639813320539103) internal successors, (31272), 23638 states have internal predecessors, (31272), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7813 states have call predecessors, (7954), 7912 states have call successors, (7954) [2022-07-20 00:04:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32538 states to 32538 states and 47158 transitions. [2022-07-20 00:04:10,564 INFO L78 Accepts]: Start accepts. Automaton has 32538 states and 47158 transitions. Word has length 77 [2022-07-20 00:04:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:04:10,565 INFO L495 AbstractCegarLoop]: Abstraction has 32538 states and 47158 transitions. [2022-07-20 00:04:10,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-20 00:04:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 32538 states and 47158 transitions. [2022-07-20 00:04:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 00:04:10,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:04:10,570 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:04:10,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 00:04:10,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:04:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:04:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1467384912, now seen corresponding path program 1 times [2022-07-20 00:04:10,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:04:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469359270] [2022-07-20 00:04:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:04:10,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:04:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:04:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:04:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:04:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:04:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:04:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:04:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:04:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-20 00:04:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:04:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-20 00:04:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-20 00:04:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 00:04:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:04:10,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469359270] [2022-07-20 00:04:10,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469359270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:04:10,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:04:10,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 00:04:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117577329] [2022-07-20 00:04:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:04:10,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 00:04:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:04:10,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 00:04:10,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 00:04:10,887 INFO L87 Difference]: Start difference. First operand 32538 states and 47158 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 00:04:12,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:04:14,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:04:16,986 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 [] [2022-07-20 00:04:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:04:26,316 INFO L93 Difference]: Finished difference Result 76464 states and 112983 transitions. [2022-07-20 00:04:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 00:04:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2022-07-20 00:04:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:04:26,554 INFO L225 Difference]: With dead ends: 76464 [2022-07-20 00:04:26,554 INFO L226 Difference]: Without dead ends: 43941 [2022-07-20 00:04:26,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 00:04:26,664 INFO L413 NwaCegarLoop]: 3329 mSDtfsCounter, 2702 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 821 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3013 SdHoareTripleChecker+Valid, 7442 SdHoareTripleChecker+Invalid, 3642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-07-20 00:04:26,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3013 Valid, 7442 Invalid, 3642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 2818 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2022-07-20 00:04:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43941 states. [2022-07-20 00:04:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43941 to 32519. [2022-07-20 00:04:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32519 states, 22908 states have (on average 1.3635847738781213) internal successors, (31237), 23621 states have internal predecessors, (31237), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7811 states have call predecessors, (7954), 7912 states have call successors, (7954) [2022-07-20 00:04:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32519 states to 32519 states and 47123 transitions. [2022-07-20 00:04:28,014 INFO L78 Accepts]: Start accepts. Automaton has 32519 states and 47123 transitions. Word has length 92 [2022-07-20 00:04:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:04:28,015 INFO L495 AbstractCegarLoop]: Abstraction has 32519 states and 47123 transitions. [2022-07-20 00:04:28,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 00:04:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32519 states and 47123 transitions. [2022-07-20 00:04:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-20 00:04:28,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:04:28,019 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:04:28,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 00:04:28,019 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:04:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:04:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -430904096, now seen corresponding path program 1 times [2022-07-20 00:04:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:04:28,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482324790] [2022-07-20 00:04:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:04:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:04:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:04:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:04:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:04:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:04:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:04:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:04:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:04:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:04:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 00:04:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:04:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 00:04:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:28,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 00:04:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:29,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:04:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:04:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 00:04:29,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:04:29,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482324790] [2022-07-20 00:04:29,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482324790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:04:29,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:04:29,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-20 00:04:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063573394] [2022-07-20 00:04:29,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:04:29,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 00:04:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:04:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 00:04:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-20 00:04:29,371 INFO L87 Difference]: Start difference. First operand 32519 states and 47123 transitions. Second operand has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 00:04:31,403 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 [] [2022-07-20 00:05:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:05:07,435 INFO L93 Difference]: Finished difference Result 98229 states and 146160 transitions. [2022-07-20 00:05:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 00:05:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 98 [2022-07-20 00:05:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:05:07,715 INFO L225 Difference]: With dead ends: 98229 [2022-07-20 00:05:07,715 INFO L226 Difference]: Without dead ends: 65725 [2022-07-20 00:05:07,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 00:05:07,816 INFO L413 NwaCegarLoop]: 2166 mSDtfsCounter, 5698 mSDsluCounter, 18124 mSDsCounter, 0 mSdLazyCounter, 14832 mSolverCounterSat, 2628 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6080 SdHoareTripleChecker+Valid, 20290 SdHoareTripleChecker+Invalid, 17461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2628 IncrementalHoareTripleChecker+Valid, 14832 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.9s IncrementalHoareTripleChecker+Time [2022-07-20 00:05:07,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6080 Valid, 20290 Invalid, 17461 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2628 Valid, 14832 Invalid, 1 Unknown, 0 Unchecked, 33.9s Time] [2022-07-20 00:05:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65725 states. [2022-07-20 00:05:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65725 to 38339. [2022-07-20 00:05:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38339 states, 27008 states have (on average 1.3634848933649288) internal successors, (36825), 27850 states have internal predecessors, (36825), 9350 states have call successors, (9350), 1976 states have call predecessors, (9350), 1980 states have return successors, (9378), 9205 states have call predecessors, (9378), 9330 states have call successors, (9378) [2022-07-20 00:05:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38339 states to 38339 states and 55553 transitions. [2022-07-20 00:05:10,179 INFO L78 Accepts]: Start accepts. Automaton has 38339 states and 55553 transitions. Word has length 98 [2022-07-20 00:05:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:05:10,180 INFO L495 AbstractCegarLoop]: Abstraction has 38339 states and 55553 transitions. [2022-07-20 00:05:10,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-20 00:05:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38339 states and 55553 transitions. [2022-07-20 00:05:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 00:05:10,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:05:10,186 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:05:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 00:05:10,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:05:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:05:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1168379698, now seen corresponding path program 1 times [2022-07-20 00:05:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:05:10,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102432919] [2022-07-20 00:05:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:05:10,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:05:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:05:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:05:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:05:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:05:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:05:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:05:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:05:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:05:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-20 00:05:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:05:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 00:05:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:10,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-20 00:05:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:11,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:05:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:11,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-20 00:05:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:11,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-20 00:05:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:05:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 00:05:11,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:05:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102432919] [2022-07-20 00:05:11,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102432919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:05:11,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:05:11,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-20 00:05:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601006163] [2022-07-20 00:05:11,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:05:11,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 00:05:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:05:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 00:05:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-20 00:05:11,242 INFO L87 Difference]: Start difference. First operand 38339 states and 55553 transitions. Second operand has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-20 00:05:13,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:05:15,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:06:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 00:06:06,409 INFO L93 Difference]: Finished difference Result 83896 states and 123849 transitions. [2022-07-20 00:06:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 00:06:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 110 [2022-07-20 00:06:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 00:06:06,607 INFO L225 Difference]: With dead ends: 83896 [2022-07-20 00:06:06,608 INFO L226 Difference]: Without dead ends: 45572 [2022-07-20 00:06:06,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 00:06:06,701 INFO L413 NwaCegarLoop]: 3511 mSDtfsCounter, 3793 mSDsluCounter, 29601 mSDsCounter, 0 mSdLazyCounter, 18930 mSolverCounterSat, 1726 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4118 SdHoareTripleChecker+Valid, 33112 SdHoareTripleChecker+Invalid, 20658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1726 IncrementalHoareTripleChecker+Valid, 18930 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.7s IncrementalHoareTripleChecker+Time [2022-07-20 00:06:06,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4118 Valid, 33112 Invalid, 20658 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1726 Valid, 18930 Invalid, 2 Unknown, 0 Unchecked, 50.7s Time] [2022-07-20 00:06:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45572 states. [2022-07-20 00:06:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45572 to 33462. [2022-07-20 00:06:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33462 states, 23551 states have (on average 1.3642308182242793) internal successors, (32129), 24286 states have internal predecessors, (32129), 8183 states have call successors, (8183), 1722 states have call predecessors, (8183), 1727 states have return successors, (8213), 8062 states have call predecessors, (8213), 8171 states have call successors, (8213) [2022-07-20 00:06:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33462 states to 33462 states and 48525 transitions. [2022-07-20 00:06:09,023 INFO L78 Accepts]: Start accepts. Automaton has 33462 states and 48525 transitions. Word has length 110 [2022-07-20 00:06:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 00:06:09,023 INFO L495 AbstractCegarLoop]: Abstraction has 33462 states and 48525 transitions. [2022-07-20 00:06:09,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-20 00:06:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 33462 states and 48525 transitions. [2022-07-20 00:06:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-20 00:06:09,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 00:06:09,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 00:06:09,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 00:06:09,054 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 00:06:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 00:06:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1791551026, now seen corresponding path program 1 times [2022-07-20 00:06:09,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 00:06:09,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964189370] [2022-07-20 00:06:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 00:06:09,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 00:06:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 00:06:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 00:06:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 00:06:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-20 00:06:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 00:06:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 00:06:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 00:06:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-20 00:06:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-20 00:06:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-20 00:06:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-20 00:06:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-20 00:06:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 00:06:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 00:06:09,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 00:06:09,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964189370] [2022-07-20 00:06:09,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964189370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 00:06:09,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 00:06:09,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 00:06:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9853152] [2022-07-20 00:06:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 00:06:09,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 00:06:09,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 00:06:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 00:06:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-20 00:06:09,619 INFO L87 Difference]: Start difference. First operand 33462 states and 48525 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-20 00:06:11,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 00:06:13,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []