./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 10:20:06,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 10:20:06,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 10:20:06,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 10:20:06,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 10:20:06,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 10:20:06,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 10:20:06,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 10:20:06,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 10:20:06,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 10:20:06,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 10:20:06,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 10:20:06,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 10:20:06,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 10:20:06,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 10:20:06,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 10:20:06,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 10:20:06,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 10:20:06,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 10:20:06,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 10:20:06,737 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 10:20:06,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 10:20:06,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 10:20:06,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 10:20:06,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 10:20:06,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 10:20:06,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 10:20:06,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 10:20:06,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 10:20:06,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 10:20:06,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 10:20:06,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 10:20:06,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 10:20:06,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 10:20:06,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 10:20:06,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 10:20:06,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 10:20:06,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 10:20:06,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 10:20:06,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 10:20:06,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 10:20:06,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 10:20:06,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 10:20:06,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 10:20:06,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 10:20:06,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 10:20:06,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 10:20:06,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 10:20:06,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 10:20:06,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 10:20:06,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 10:20:06,785 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 10:20:06,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 10:20:06,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 10:20:06,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 10:20:06,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 10:20:06,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 10:20:06,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 10:20:06,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 10:20:06,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 10:20:06,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 10:20:06,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 10:20:06,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 10:20:06,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 10:20:06,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 10:20:06,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 10:20:06,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 10:20:06,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 10:20:06,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 10:20:06,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 10:20:06,788 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 10:20:06,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 10:20:06,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 10:20:06,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2022-07-21 10:20:07,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 10:20:07,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 10:20:07,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 10:20:07,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 10:20:07,080 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 10:20:07,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-21 10:20:07,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02eeca23d/d39dfd9669d2499c938d098ca098afc6/FLAG705325bdd [2022-07-21 10:20:07,690 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 10:20:07,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-21 10:20:07,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02eeca23d/d39dfd9669d2499c938d098ca098afc6/FLAG705325bdd [2022-07-21 10:20:08,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02eeca23d/d39dfd9669d2499c938d098ca098afc6 [2022-07-21 10:20:08,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 10:20:08,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 10:20:08,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 10:20:08,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 10:20:08,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 10:20:08,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:20:08" (1/1) ... [2022-07-21 10:20:08,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219fc19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:08, skipping insertion in model container [2022-07-21 10:20:08,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:20:08" (1/1) ... [2022-07-21 10:20:08,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 10:20:08,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 10:20:08,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-07-21 10:20:09,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 10:20:09,040 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 10:20:09,170 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-07-21 10:20:09,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 10:20:09,232 INFO L208 MainTranslator]: Completed translation [2022-07-21 10:20:09,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09 WrapperNode [2022-07-21 10:20:09,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 10:20:09,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 10:20:09,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 10:20:09,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 10:20:09,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,395 INFO L137 Inliner]: procedures = 191, calls = 1268, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3442 [2022-07-21 10:20:09,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 10:20:09,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 10:20:09,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 10:20:09,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 10:20:09,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 10:20:09,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 10:20:09,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 10:20:09,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 10:20:09,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (1/1) ... [2022-07-21 10:20:09,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 10:20:09,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 10:20:09,608 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) [2022-07-21 10:20:09,622 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 [2022-07-21 10:20:09,634 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-21 10:20:09,634 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-21 10:20:09,634 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-21 10:20:09,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-21 10:20:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-21 10:20:09,635 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-21 10:20:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-21 10:20:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-21 10:20:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-21 10:20:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 10:20:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-21 10:20:09,635 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-21 10:20:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-21 10:20:09,636 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-21 10:20:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-21 10:20:09,636 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-21 10:20:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-21 10:20:09,636 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-21 10:20:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-21 10:20:09,636 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-21 10:20:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-21 10:20:09,637 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-21 10:20:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 10:20:09,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 10:20:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-21 10:20:09,637 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-21 10:20:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-07-21 10:20:09,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-07-21 10:20:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-21 10:20:09,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-21 10:20:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-21 10:20:09,638 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-21 10:20:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-21 10:20:09,638 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-21 10:20:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-21 10:20:09,638 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-21 10:20:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-21 10:20:09,639 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-21 10:20:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 10:20:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-21 10:20:09,639 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-21 10:20:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-21 10:20:09,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-21 10:20:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-21 10:20:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-21 10:20:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-21 10:20:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-21 10:20:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-21 10:20:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-21 10:20:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-07-21 10:20:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-07-21 10:20:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-21 10:20:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-21 10:20:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-21 10:20:09,641 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-21 10:20:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 10:20:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-21 10:20:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-21 10:20:09,642 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-21 10:20:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-21 10:20:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-21 10:20:09,643 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-21 10:20:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-21 10:20:09,643 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-21 10:20:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-21 10:20:09,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-21 10:20:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 10:20:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-21 10:20:09,644 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-21 10:20:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-21 10:20:09,644 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-21 10:20:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 10:20:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 10:20:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-21 10:20:09,645 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-21 10:20:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-21 10:20:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-21 10:20:09,645 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-21 10:20:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-21 10:20:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-21 10:20:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 10:20:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-21 10:20:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-21 10:20:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-21 10:20:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-21 10:20:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-21 10:20:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-21 10:20:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-21 10:20:09,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-21 10:20:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-21 10:20:09,647 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-21 10:20:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-21 10:20:09,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-21 10:20:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-21 10:20:09,648 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-21 10:20:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-21 10:20:09,648 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-21 10:20:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-21 10:20:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-21 10:20:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-21 10:20:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-21 10:20:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 10:20:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 10:20:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-21 10:20:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-21 10:20:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-21 10:20:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-21 10:20:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-21 10:20:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-21 10:20:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-21 10:20:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-21 10:20:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-21 10:20:09,651 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-21 10:20:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-21 10:20:09,651 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-21 10:20:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-21 10:20:09,651 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-21 10:20:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-21 10:20:09,652 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-21 10:20:09,654 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-21 10:20:09,654 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-21 10:20:09,654 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-21 10:20:09,654 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-21 10:20:09,655 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-21 10:20:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-21 10:20:09,655 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-21 10:20:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-21 10:20:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-21 10:20:09,659 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-21 10:20:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-21 10:20:09,660 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-21 10:20:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-21 10:20:09,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-21 10:20:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-21 10:20:09,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-21 10:20:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 10:20:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-07-21 10:20:09,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-07-21 10:20:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-21 10:20:09,661 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-21 10:20:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-21 10:20:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-21 10:20:09,661 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-21 10:20:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-21 10:20:09,661 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-21 10:20:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 10:20:09,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 10:20:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-21 10:20:09,661 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-21 10:20:10,217 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 10:20:10,220 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 10:20:23,245 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 10:20:23,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 10:20:23,262 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 10:20:23,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:20:23 BoogieIcfgContainer [2022-07-21 10:20:23,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 10:20:23,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 10:20:23,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 10:20:23,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 10:20:23,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:20:08" (1/3) ... [2022-07-21 10:20:23,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40caa981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:20:23, skipping insertion in model container [2022-07-21 10:20:23,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:09" (2/3) ... [2022-07-21 10:20:23,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40caa981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:20:23, skipping insertion in model container [2022-07-21 10:20:23,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:20:23" (3/3) ... [2022-07-21 10:20:23,271 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-21 10:20:23,281 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 10:20:23,282 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 10:20:23,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 10:20:23,363 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@44918d22, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@171e6622 [2022-07-21 10:20:23,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 10:20:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2022-07-21 10:20:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 10:20:23,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:20:23,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:20:23,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:20:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:20:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1087819150, now seen corresponding path program 1 times [2022-07-21 10:20:23,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:20:23,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50780279] [2022-07-21 10:20:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:20:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:20:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:23,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:20:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:23,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:20:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:20:23,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:20:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50780279] [2022-07-21 10:20:23,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50780279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:20:23,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:20:23,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:20:23,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720473692] [2022-07-21 10:20:23,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:20:23,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:20:23,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:20:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:20:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:20:23,978 INFO L87 Difference]: Start difference. First operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 10:20:26,015 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 [] [2022-07-21 10:20:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:20:30,302 INFO L93 Difference]: Finished difference Result 4165 states and 6365 transitions. [2022-07-21 10:20:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:20:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-21 10:20:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:20:30,333 INFO L225 Difference]: With dead ends: 4165 [2022-07-21 10:20:30,338 INFO L226 Difference]: Without dead ends: 2887 [2022-07-21 10:20:30,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:20:30,369 INFO L413 NwaCegarLoop]: 2056 mSDtfsCounter, 3067 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 922 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 4247 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-21 10:20:30,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3362 Valid, 4247 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 1393 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-07-21 10:20:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-21 10:20:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2330. [2022-07-21 10:20:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1616 states have (on average 1.3545792079207921) internal successors, (2189), 1674 states have internal predecessors, (2189), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2022-07-21 10:20:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3366 transitions. [2022-07-21 10:20:30,553 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3366 transitions. Word has length 17 [2022-07-21 10:20:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:20:30,553 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3366 transitions. [2022-07-21 10:20:30,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 10:20:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3366 transitions. [2022-07-21 10:20:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 10:20:30,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:20:30,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:20:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 10:20:30,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:20:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:20:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash 636307650, now seen corresponding path program 1 times [2022-07-21 10:20:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:20:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150204035] [2022-07-21 10:20:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:20:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:20:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:30,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:20:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:20:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:20:30,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:20:30,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150204035] [2022-07-21 10:20:30,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150204035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:20:30,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:20:30,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:20:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822972727] [2022-07-21 10:20:30,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:20:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:20:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:20:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:20:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:20:30,763 INFO L87 Difference]: Start difference. First operand 2330 states and 3366 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 10:20:32,813 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 [] [2022-07-21 10:20:37,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:20:37,599 INFO L93 Difference]: Finished difference Result 6873 states and 10148 transitions. [2022-07-21 10:20:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:20:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-07-21 10:20:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:20:37,630 INFO L225 Difference]: With dead ends: 6873 [2022-07-21 10:20:37,631 INFO L226 Difference]: Without dead ends: 5734 [2022-07-21 10:20:37,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:20:37,640 INFO L413 NwaCegarLoop]: 3007 mSDtfsCounter, 2517 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 769 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 5464 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-07-21 10:20:37,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2811 Valid, 5464 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1425 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2022-07-21 10:20:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2022-07-21 10:20:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4620. [2022-07-21 10:20:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 3209 states have (on average 1.3549392334060455) internal successors, (4348), 3319 states have internal predecessors, (4348), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2022-07-21 10:20:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 6678 transitions. [2022-07-21 10:20:37,787 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 6678 transitions. Word has length 18 [2022-07-21 10:20:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:20:37,787 INFO L495 AbstractCegarLoop]: Abstraction has 4620 states and 6678 transitions. [2022-07-21 10:20:37,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 10:20:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 6678 transitions. [2022-07-21 10:20:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 10:20:37,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:20:37,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:20:37,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 10:20:37,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:20:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:20:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash 312341314, now seen corresponding path program 1 times [2022-07-21 10:20:37,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:20:37,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019566984] [2022-07-21 10:20:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:20:37,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:20:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:37,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:20:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:37,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:20:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:37,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 10:20:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:37,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:20:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:20:37,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:20:37,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019566984] [2022-07-21 10:20:37,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019566984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:20:37,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:20:37,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:20:37,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753261630] [2022-07-21 10:20:37,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:20:37,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:20:37,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:20:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:20:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:20:37,998 INFO L87 Difference]: Start difference. First operand 4620 states and 6678 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 10:20:40,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:20:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:20:44,241 INFO L93 Difference]: Finished difference Result 12536 states and 18549 transitions. [2022-07-21 10:20:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:20:44,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-21 10:20:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:20:44,297 INFO L225 Difference]: With dead ends: 12536 [2022-07-21 10:20:44,298 INFO L226 Difference]: Without dead ends: 11382 [2022-07-21 10:20:44,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:20:44,314 INFO L413 NwaCegarLoop]: 2291 mSDtfsCounter, 2930 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 929 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3221 SdHoareTripleChecker+Valid, 4280 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-21 10:20:44,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3221 Valid, 4280 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 1413 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-07-21 10:20:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-07-21 10:20:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 8047. [2022-07-21 10:20:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8047 states, 5595 states have (on average 1.3549597855227882) internal successors, (7581), 5785 states have internal predecessors, (7581), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2022-07-21 10:20:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8047 states to 8047 states and 11633 transitions. [2022-07-21 10:20:44,635 INFO L78 Accepts]: Start accepts. Automaton has 8047 states and 11633 transitions. Word has length 36 [2022-07-21 10:20:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:20:44,635 INFO L495 AbstractCegarLoop]: Abstraction has 8047 states and 11633 transitions. [2022-07-21 10:20:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 10:20:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8047 states and 11633 transitions. [2022-07-21 10:20:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 10:20:44,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:20:44,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:20:44,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 10:20:44,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:20:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:20:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1062377866, now seen corresponding path program 1 times [2022-07-21 10:20:44,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:20:44,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871315831] [2022-07-21 10:20:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:20:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:20:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:45,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:20:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:45,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:20:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:20:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:45,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:20:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:20:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:20:45,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:20:45,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871315831] [2022-07-21 10:20:45,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871315831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:20:45,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:20:45,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 10:20:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782950868] [2022-07-21 10:20:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:20:45,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 10:20:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:20:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 10:20:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-07-21 10:20:45,363 INFO L87 Difference]: Start difference. First operand 8047 states and 11633 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 10:20:47,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:21:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:21:12,818 INFO L93 Difference]: Finished difference Result 23274 states and 34407 transitions. [2022-07-21 10:21:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 10:21:12,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-21 10:21:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:21:12,903 INFO L225 Difference]: With dead ends: 23274 [2022-07-21 10:21:12,903 INFO L226 Difference]: Without dead ends: 17598 [2022-07-21 10:21:12,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-21 10:21:12,934 INFO L413 NwaCegarLoop]: 2563 mSDtfsCounter, 3598 mSDsluCounter, 19754 mSDsCounter, 0 mSdLazyCounter, 13141 mSolverCounterSat, 1517 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3895 SdHoareTripleChecker+Valid, 22317 SdHoareTripleChecker+Invalid, 14659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 13141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2022-07-21 10:21:12,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3895 Valid, 22317 Invalid, 14659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1517 Valid, 13141 Invalid, 1 Unknown, 0 Unchecked, 26.0s Time] [2022-07-21 10:21:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17598 states. [2022-07-21 10:21:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17598 to 11508. [2022-07-21 10:21:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 7999 states have (on average 1.354544318039755) internal successors, (10835), 8269 states have internal predecessors, (10835), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2022-07-21 10:21:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 16633 transitions. [2022-07-21 10:21:13,403 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 16633 transitions. Word has length 38 [2022-07-21 10:21:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:21:13,403 INFO L495 AbstractCegarLoop]: Abstraction has 11508 states and 16633 transitions. [2022-07-21 10:21:13,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 10:21:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 16633 transitions. [2022-07-21 10:21:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 10:21:13,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:21:13,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:21:13,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 10:21:13,407 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:21:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:21:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash -479641513, now seen corresponding path program 1 times [2022-07-21 10:21:13,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:21:13,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192579816] [2022-07-21 10:21:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:21:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:21:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:13,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:21:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:21:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 10:21:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:14,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 10:21:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:14,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:21:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 10:21:14,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:21:14,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192579816] [2022-07-21 10:21:14,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192579816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:21:14,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:21:14,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 10:21:14,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708040261] [2022-07-21 10:21:14,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:21:14,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 10:21:14,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:21:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 10:21:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-21 10:21:14,406 INFO L87 Difference]: Start difference. First operand 11508 states and 16633 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 10:21:16,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:21:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:21:44,361 INFO L93 Difference]: Finished difference Result 18438 states and 27352 transitions. [2022-07-21 10:21:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 10:21:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2022-07-21 10:21:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:21:44,422 INFO L225 Difference]: With dead ends: 18438 [2022-07-21 10:21:44,422 INFO L226 Difference]: Without dead ends: 17321 [2022-07-21 10:21:44,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 10:21:44,434 INFO L413 NwaCegarLoop]: 2202 mSDtfsCounter, 4361 mSDsluCounter, 17878 mSDsCounter, 0 mSdLazyCounter, 14133 mSolverCounterSat, 1911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4649 SdHoareTripleChecker+Valid, 20080 SdHoareTripleChecker+Invalid, 16045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1911 IncrementalHoareTripleChecker+Valid, 14133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2022-07-21 10:21:44,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4649 Valid, 20080 Invalid, 16045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1911 Valid, 14133 Invalid, 1 Unknown, 0 Unchecked, 27.9s Time] [2022-07-21 10:21:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17321 states. [2022-07-21 10:21:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17321 to 10399. [2022-07-21 10:21:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7231 states have (on average 1.3536163739455125) internal successors, (9788), 7475 states have internal predecessors, (9788), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2022-07-21 10:21:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 15016 transitions. [2022-07-21 10:21:44,922 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 15016 transitions. Word has length 45 [2022-07-21 10:21:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:21:44,924 INFO L495 AbstractCegarLoop]: Abstraction has 10399 states and 15016 transitions. [2022-07-21 10:21:44,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 10:21:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 15016 transitions. [2022-07-21 10:21:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 10:21:44,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:21:44,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:21:44,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 10:21:44,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:21:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:21:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash 80113123, now seen corresponding path program 1 times [2022-07-21 10:21:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:21:44,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533445300] [2022-07-21 10:21:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:21:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:21:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:45,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:21:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:45,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:21:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:45,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:21:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:45,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:21:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:21:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 10:21:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:21:45,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:21:45,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533445300] [2022-07-21 10:21:45,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533445300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:21:45,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:21:45,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:21:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717505160] [2022-07-21 10:21:45,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:21:45,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:21:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:21:45,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:21:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:21:45,118 INFO L87 Difference]: Start difference. First operand 10399 states and 15016 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 10:21:47,207 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 [] [2022-07-21 10:21:49,237 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 [] [2022-07-21 10:21:53,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:21:53,464 INFO L93 Difference]: Finished difference Result 15673 states and 23232 transitions. [2022-07-21 10:21:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:21:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2022-07-21 10:21:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:21:53,538 INFO L225 Difference]: With dead ends: 15673 [2022-07-21 10:21:53,539 INFO L226 Difference]: Without dead ends: 15652 [2022-07-21 10:21:53,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:21:53,552 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 2419 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 670 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 5766 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-21 10:21:53,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 5766 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1441 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-07-21 10:21:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2022-07-21 10:21:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 8137. [2022-07-21 10:21:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 5661 states have (on average 1.3511747041158806) internal successors, (7649), 5853 states have internal predecessors, (7649), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-21 10:21:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 11731 transitions. [2022-07-21 10:21:54,047 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 11731 transitions. Word has length 52 [2022-07-21 10:21:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:21:54,047 INFO L495 AbstractCegarLoop]: Abstraction has 8137 states and 11731 transitions. [2022-07-21 10:21:54,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 10:21:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 11731 transitions. [2022-07-21 10:21:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 10:21:54,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:21:54,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:21:54,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 10:21:54,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:21:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:21:54,050 INFO L85 PathProgramCache]: Analyzing trace with hash 139061074, now seen corresponding path program 1 times [2022-07-21 10:21:54,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:21:54,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757948386] [2022-07-21 10:21:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:21:54,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:21:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:21:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:21:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 10:21:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 10:21:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:21:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 10:21:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 10:21:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:21:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 10:21:54,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:21:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757948386] [2022-07-21 10:21:54,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757948386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:21:54,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:21:54,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 10:21:54,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536303814] [2022-07-21 10:21:54,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:21:54,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 10:21:54,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:21:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 10:21:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-21 10:21:54,675 INFO L87 Difference]: Start difference. First operand 8137 states and 11731 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 10:21:56,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:21:58,736 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 [] [2022-07-21 10:22:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:22:20,807 INFO L93 Difference]: Finished difference Result 13968 states and 20655 transitions. [2022-07-21 10:22:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 10:22:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-07-21 10:22:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:22:20,847 INFO L225 Difference]: With dead ends: 13968 [2022-07-21 10:22:20,847 INFO L226 Difference]: Without dead ends: 12854 [2022-07-21 10:22:20,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-07-21 10:22:20,854 INFO L413 NwaCegarLoop]: 3052 mSDtfsCounter, 3169 mSDsluCounter, 21061 mSDsCounter, 0 mSdLazyCounter, 12985 mSolverCounterSat, 1279 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 24113 SdHoareTripleChecker+Invalid, 14266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 12985 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2022-07-21 10:22:20,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3466 Valid, 24113 Invalid, 14266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1279 Valid, 12985 Invalid, 2 Unknown, 0 Unchecked, 24.5s Time] [2022-07-21 10:22:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12854 states. [2022-07-21 10:22:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12854 to 8135. [2022-07-21 10:22:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 5659 states have (on average 1.351122106379219) internal successors, (7646), 5851 states have internal predecessors, (7646), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-21 10:22:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 11728 transitions. [2022-07-21 10:22:21,337 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 11728 transitions. Word has length 53 [2022-07-21 10:22:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:22:21,337 INFO L495 AbstractCegarLoop]: Abstraction has 8135 states and 11728 transitions. [2022-07-21 10:22:21,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 10:22:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 11728 transitions. [2022-07-21 10:22:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 10:22:21,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:22:21,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:22:21,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 10:22:21,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:22:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:22:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -538213409, now seen corresponding path program 1 times [2022-07-21 10:22:21,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:22:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925994482] [2022-07-21 10:22:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:22:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:22:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:21,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:22:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:21,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:22:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:21,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 10:22:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 10:22:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:22,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:22:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:22,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 10:22:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:22,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 10:22:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 10:22:22,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:22:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925994482] [2022-07-21 10:22:22,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925994482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:22:22,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:22:22,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 10:22:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287817291] [2022-07-21 10:22:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:22:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 10:22:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:22:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 10:22:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-21 10:22:22,225 INFO L87 Difference]: Start difference. First operand 8135 states and 11728 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 10:22:24,253 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 [] [2022-07-21 10:22:26,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:22:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:22:42,323 INFO L93 Difference]: Finished difference Result 11758 states and 17237 transitions. [2022-07-21 10:22:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 10:22:42,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2022-07-21 10:22:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:22:42,347 INFO L225 Difference]: With dead ends: 11758 [2022-07-21 10:22:42,348 INFO L226 Difference]: Without dead ends: 7187 [2022-07-21 10:22:42,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-07-21 10:22:42,363 INFO L413 NwaCegarLoop]: 1679 mSDtfsCounter, 961 mSDsluCounter, 13965 mSDsCounter, 0 mSdLazyCounter, 8656 mSolverCounterSat, 372 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 15644 SdHoareTripleChecker+Invalid, 9030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 8656 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-07-21 10:22:42,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 15644 Invalid, 9030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [372 Valid, 8656 Invalid, 2 Unknown, 0 Unchecked, 18.9s Time] [2022-07-21 10:22:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2022-07-21 10:22:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 5809. [2022-07-21 10:22:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4038 states have (on average 1.3506686478454681) internal successors, (5454), 4173 states have internal predecessors, (5454), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2022-07-21 10:22:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8374 transitions. [2022-07-21 10:22:42,733 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8374 transitions. Word has length 56 [2022-07-21 10:22:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:22:42,734 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 8374 transitions. [2022-07-21 10:22:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 10:22:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8374 transitions. [2022-07-21 10:22:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 10:22:42,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:22:42,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:22:42,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 10:22:42,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:22:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:22:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash 762935669, now seen corresponding path program 1 times [2022-07-21 10:22:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:22:42,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673719979] [2022-07-21 10:22:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:22:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:22:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:42,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:22:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:22:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:43,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:22:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:22:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:43,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:22:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 10:22:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:43,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 10:22:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:22:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:22:43,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:22:43,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673719979] [2022-07-21 10:22:43,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673719979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:22:43,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:22:43,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 10:22:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154483744] [2022-07-21 10:22:43,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:22:43,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 10:22:43,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:22:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 10:22:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 10:22:43,068 INFO L87 Difference]: Start difference. First operand 5809 states and 8374 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 10:22:45,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:22:47,145 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 [] [2022-07-21 10:23:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:23:02,964 INFO L93 Difference]: Finished difference Result 9365 states and 13991 transitions. [2022-07-21 10:23:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 10:23:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2022-07-21 10:23:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:23:02,992 INFO L225 Difference]: With dead ends: 9365 [2022-07-21 10:23:02,992 INFO L226 Difference]: Without dead ends: 8228 [2022-07-21 10:23:02,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-21 10:23:02,999 INFO L413 NwaCegarLoop]: 2232 mSDtfsCounter, 3300 mSDsluCounter, 3636 mSDsCounter, 0 mSdLazyCounter, 7863 mSolverCounterSat, 1862 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 5868 SdHoareTripleChecker+Invalid, 9727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1862 IncrementalHoareTripleChecker+Valid, 7863 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2022-07-21 10:23:02,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 5868 Invalid, 9727 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1862 Valid, 7863 Invalid, 2 Unknown, 0 Unchecked, 19.0s Time] [2022-07-21 10:23:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2022-07-21 10:23:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 5798. [2022-07-21 10:23:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5798 states, 4032 states have (on average 1.3504464285714286) internal successors, (5445), 4165 states have internal predecessors, (5445), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-21 10:23:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 8356 transitions. [2022-07-21 10:23:03,413 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 8356 transitions. Word has length 64 [2022-07-21 10:23:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:23:03,413 INFO L495 AbstractCegarLoop]: Abstraction has 5798 states and 8356 transitions. [2022-07-21 10:23:03,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 10:23:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 8356 transitions. [2022-07-21 10:23:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 10:23:03,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:23:03,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:23:03,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 10:23:03,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:23:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:23:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1307494641, now seen corresponding path program 1 times [2022-07-21 10:23:03,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:23:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227258028] [2022-07-21 10:23:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:23:03,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:23:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:03,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:23:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:03,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:23:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:23:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:03,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:23:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:03,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:23:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 10:23:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 10:23:03,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:23:03,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227258028] [2022-07-21 10:23:03,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227258028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:23:03,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:23:03,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 10:23:03,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885760214] [2022-07-21 10:23:03,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:23:03,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 10:23:03,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:23:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 10:23:03,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 10:23:03,621 INFO L87 Difference]: Start difference. First operand 5798 states and 8356 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 10:23:05,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:23:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:23:10,611 INFO L93 Difference]: Finished difference Result 7437 states and 11043 transitions. [2022-07-21 10:23:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 10:23:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-07-21 10:23:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:23:10,630 INFO L225 Difference]: With dead ends: 7437 [2022-07-21 10:23:10,630 INFO L226 Difference]: Without dead ends: 7432 [2022-07-21 10:23:10,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 10:23:10,632 INFO L413 NwaCegarLoop]: 2137 mSDtfsCounter, 1356 mSDsluCounter, 4441 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 679 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1547 SdHoareTripleChecker+Valid, 6578 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-21 10:23:10,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1547 Valid, 6578 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 2425 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-07-21 10:23:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-07-21 10:23:10,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 5792. [2022-07-21 10:23:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 4027 states have (on average 1.3498882542835857) internal successors, (5436), 4159 states have internal predecessors, (5436), 1456 states have call successors, (1456), 313 states have call predecessors, (1456), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-21 10:23:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 8346 transitions. [2022-07-21 10:23:10,992 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 8346 transitions. Word has length 63 [2022-07-21 10:23:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:23:10,992 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 8346 transitions. [2022-07-21 10:23:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-21 10:23:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 8346 transitions. [2022-07-21 10:23:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 10:23:10,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:23:10,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:23:10,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 10:23:10,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:23:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:23:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash -384487029, now seen corresponding path program 1 times [2022-07-21 10:23:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:23:10,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656059080] [2022-07-21 10:23:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:23:10,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:23:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:23:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:23:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:23:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:23:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:23:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 10:23:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 10:23:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 10:23:11,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:23:11,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656059080] [2022-07-21 10:23:11,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656059080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 10:23:11,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952454443] [2022-07-21 10:23:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:23:11,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 10:23:11,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 10:23:11,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 10:23:11,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 10:23:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:12,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 10:23:12,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 10:23:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:23:12,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 10:23:12,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952454443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:23:12,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 10:23:12,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-21 10:23:12,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595495548] [2022-07-21 10:23:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:23:12,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 10:23:12,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:23:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 10:23:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-21 10:23:12,315 INFO L87 Difference]: Start difference. First operand 5792 states and 8346 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 10:23:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:23:13,027 INFO L93 Difference]: Finished difference Result 7744 states and 11292 transitions. [2022-07-21 10:23:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 10:23:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-21 10:23:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:23:13,041 INFO L225 Difference]: With dead ends: 7744 [2022-07-21 10:23:13,041 INFO L226 Difference]: Without dead ends: 4324 [2022-07-21 10:23:13,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-21 10:23:13,050 INFO L413 NwaCegarLoop]: 2124 mSDtfsCounter, 948 mSDsluCounter, 7614 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 9738 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 10:23:13,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 9738 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 10:23:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-07-21 10:23:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3544. [2022-07-21 10:23:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2468 states have (on average 1.342382495948136) internal successors, (3313), 2546 states have internal predecessors, (3313), 880 states have call successors, (880), 198 states have call predecessors, (880), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2022-07-21 10:23:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5072 transitions. [2022-07-21 10:23:13,358 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5072 transitions. Word has length 66 [2022-07-21 10:23:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:23:13,358 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 5072 transitions. [2022-07-21 10:23:13,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 10:23:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5072 transitions. [2022-07-21 10:23:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 10:23:13,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:23:13,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:23:13,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 10:23:13,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 10:23:13,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:23:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:23:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2013478679, now seen corresponding path program 1 times [2022-07-21 10:23:13,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:23:13,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45847964] [2022-07-21 10:23:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:23:13,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:23:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:23:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:23:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:23:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:23:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:23:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 10:23:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-21 10:23:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 10:23:13,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:23:13,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45847964] [2022-07-21 10:23:13,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45847964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:23:13,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:23:13,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 10:23:13,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555386561] [2022-07-21 10:23:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:23:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 10:23:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:23:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 10:23:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 10:23:13,869 INFO L87 Difference]: Start difference. First operand 3544 states and 5072 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 10:23:15,902 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 [] [2022-07-21 10:23:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:23:23,465 INFO L93 Difference]: Finished difference Result 6888 states and 10119 transitions. [2022-07-21 10:23:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 10:23:23,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-07-21 10:23:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:23:23,481 INFO L225 Difference]: With dead ends: 6888 [2022-07-21 10:23:23,481 INFO L226 Difference]: Without dead ends: 4620 [2022-07-21 10:23:23,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 10:23:23,489 INFO L413 NwaCegarLoop]: 2746 mSDtfsCounter, 1604 mSDsluCounter, 7994 mSDsCounter, 0 mSdLazyCounter, 3634 mSolverCounterSat, 785 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 10740 SdHoareTripleChecker+Invalid, 4420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 3634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-07-21 10:23:23,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 10740 Invalid, 4420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 3634 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-07-21 10:23:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2022-07-21 10:23:23,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 3525. [2022-07-21 10:23:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 2456 states have (on average 1.3424267100977199) internal successors, (3297), 2533 states have internal predecessors, (3297), 875 states have call successors, (875), 194 states have call predecessors, (875), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2022-07-21 10:23:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5047 transitions. [2022-07-21 10:23:23,800 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5047 transitions. Word has length 69 [2022-07-21 10:23:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:23:23,800 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 5047 transitions. [2022-07-21 10:23:23,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 10:23:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5047 transitions. [2022-07-21 10:23:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 10:23:23,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:23:23,801 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 10:23:23,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 10:23:23,802 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:23:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:23:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1690739862, now seen corresponding path program 1 times [2022-07-21 10:23:23,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:23:23,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622837691] [2022-07-21 10:23:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:23:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:23:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:23:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:23:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:23:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:23:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:23:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 10:23:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 10:23:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 10:23:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-21 10:23:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 10:23:24,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:23:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622837691] [2022-07-21 10:23:24,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622837691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:23:24,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:23:24,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 10:23:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184928803] [2022-07-21 10:23:24,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:23:24,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 10:23:24,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:23:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 10:23:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-21 10:23:24,287 INFO L87 Difference]: Start difference. First operand 3525 states and 5047 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 10:23:26,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:23:28,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:23:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:23:52,486 INFO L93 Difference]: Finished difference Result 6571 states and 9626 transitions. [2022-07-21 10:23:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 10:23:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2022-07-21 10:23:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:23:52,498 INFO L225 Difference]: With dead ends: 6571 [2022-07-21 10:23:52,498 INFO L226 Difference]: Without dead ends: 4321 [2022-07-21 10:23:52,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-21 10:23:52,504 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 2126 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 13738 mSolverCounterSat, 892 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2366 SdHoareTripleChecker+Valid, 5324 SdHoareTripleChecker+Invalid, 14632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 13738 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-07-21 10:23:52,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2366 Valid, 5324 Invalid, 14632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [892 Valid, 13738 Invalid, 2 Unknown, 0 Unchecked, 27.4s Time] [2022-07-21 10:23:52,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2022-07-21 10:23:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3495. [2022-07-21 10:23:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2434 states have (on average 1.3447000821692687) internal successors, (3273), 2511 states have internal predecessors, (3273), 871 states have call successors, (871), 190 states have call predecessors, (871), 189 states have return successors, (871), 859 states have call predecessors, (871), 868 states have call successors, (871) [2022-07-21 10:23:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5015 transitions. [2022-07-21 10:23:52,751 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5015 transitions. Word has length 71 [2022-07-21 10:23:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:23:52,751 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5015 transitions. [2022-07-21 10:23:52,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 10:23:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5015 transitions. [2022-07-21 10:23:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 10:23:52,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:23:52,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:23:52,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 10:23:52,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:23:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:23:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1250189697, now seen corresponding path program 1 times [2022-07-21 10:23:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:23:52,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018204550] [2022-07-21 10:23:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:23:52,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:23:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:23:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:23:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:23:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:23:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:23:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 10:23:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 10:23:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-21 10:23:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-21 10:23:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:23:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 10:23:52,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:23:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018204550] [2022-07-21 10:23:52,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018204550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:23:52,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:23:52,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 10:23:52,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478553254] [2022-07-21 10:23:52,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:23:52,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 10:23:52,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:23:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 10:23:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:23:52,978 INFO L87 Difference]: Start difference. First operand 3495 states and 5015 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 10:23:55,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:23:57,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:23:59,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 10:24:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:24:07,738 INFO L93 Difference]: Finished difference Result 5712 states and 8436 transitions. [2022-07-21 10:24:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 10:24:07,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 79 [2022-07-21 10:24:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:24:07,753 INFO L225 Difference]: With dead ends: 5712 [2022-07-21 10:24:07,753 INFO L226 Difference]: Without dead ends: 5697 [2022-07-21 10:24:07,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 10:24:07,754 INFO L413 NwaCegarLoop]: 2066 mSDtfsCounter, 4927 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 2060 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5163 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2060 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-07-21 10:24:07,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5163 Valid, 3116 Invalid, 5164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2060 Valid, 3101 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2022-07-21 10:24:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2022-07-21 10:24:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 2372. [2022-07-21 10:24:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1655 states have (on average 1.3371601208459214) internal successors, (2213), 1706 states have internal predecessors, (2213), 585 states have call successors, (585), 131 states have call predecessors, (585), 131 states have return successors, (587), 578 states have call predecessors, (587), 584 states have call successors, (587) [2022-07-21 10:24:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3385 transitions. [2022-07-21 10:24:07,964 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3385 transitions. Word has length 79 [2022-07-21 10:24:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:24:07,965 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3385 transitions. [2022-07-21 10:24:07,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 10:24:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3385 transitions. [2022-07-21 10:24:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 10:24:07,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:24:07,966 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 10:24:07,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 10:24:07,966 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:24:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:24:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1557420679, now seen corresponding path program 1 times [2022-07-21 10:24:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:24:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468579795] [2022-07-21 10:24:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:24:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:24:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 10:24:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 10:24:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 10:24:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:24:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 10:24:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 10:24:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 10:24:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 10:24:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:24:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 10:24:08,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:24:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468579795] [2022-07-21 10:24:08,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468579795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:24:08,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:24:08,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 10:24:08,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361253278] [2022-07-21 10:24:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:24:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 10:24:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:24:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 10:24:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-21 10:24:08,301 INFO L87 Difference]: Start difference. First operand 2372 states and 3385 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 10:24:10,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []