./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/packet_filter.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/heap-data/packet_filter.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 11:16:24,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 11:16:24,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 11:16:24,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 11:16:24,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 11:16:24,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 11:16:24,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 11:16:24,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 11:16:24,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 11:16:24,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 11:16:24,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 11:16:24,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 11:16:24,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 11:16:24,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 11:16:24,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 11:16:24,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 11:16:24,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 11:16:24,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 11:16:24,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 11:16:24,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 11:16:24,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 11:16:24,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 11:16:24,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 11:16:24,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 11:16:24,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 11:16:24,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 11:16:24,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 11:16:24,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 11:16:24,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 11:16:24,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 11:16:24,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 11:16:24,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 11:16:24,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 11:16:24,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 11:16:24,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 11:16:24,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 11:16:24,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 11:16:24,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 11:16:24,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 11:16:24,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 11:16:24,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 11:16:24,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 11:16:24,915 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 11:16:24,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 11:16:24,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 11:16:24,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 11:16:24,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 11:16:24,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 11:16:24,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 11:16:24,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 11:16:24,918 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 11:16:24,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 11:16:24,918 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 11:16:24,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 11:16:24,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 11:16:24,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 11:16:24,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 11:16:24,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 11:16:24,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 11:16:24,919 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 11:16:24,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 11:16:24,919 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 11:16:24,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 11:16:24,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 11:16:24,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 11:16:24,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 11:16:24,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:16:24,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 11:16:24,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 11:16:24,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 11:16:24,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 11:16:24,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 11:16:24,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 11:16:24,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 11:16:24,921 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 11:16:24,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 11:16:24,922 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 11:16:24,922 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f [2023-02-14 11:16:25,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 11:16:25,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 11:16:25,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 11:16:25,180 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 11:16:25,188 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 11:16:25,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/packet_filter.i [2023-02-14 11:16:26,257 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 11:16:26,435 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 11:16:26,435 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i [2023-02-14 11:16:26,444 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fef93773/4ada70244f434d5fa9e724287131fc0e/FLAGa0800670e [2023-02-14 11:16:26,453 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fef93773/4ada70244f434d5fa9e724287131fc0e [2023-02-14 11:16:26,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 11:16:26,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 11:16:26,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 11:16:26,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 11:16:26,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 11:16:26,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2259e53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26, skipping insertion in model container [2023-02-14 11:16:26,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 11:16:26,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 11:16:26,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_nondet_charp [2023-02-14 11:16:26,660 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2023-02-14 11:16:26,672 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2023-02-14 11:16:26,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:16:26,687 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 11:16:26,734 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_nondet_charp [2023-02-14 11:16:26,744 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2023-02-14 11:16:26,751 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2023-02-14 11:16:26,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:16:26,776 INFO L208 MainTranslator]: Completed translation [2023-02-14 11:16:26,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26 WrapperNode [2023-02-14 11:16:26,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 11:16:26,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 11:16:26,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 11:16:26,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 11:16:26,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,811 INFO L138 Inliner]: procedures = 130, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 156 [2023-02-14 11:16:26,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 11:16:26,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 11:16:26,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 11:16:26,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 11:16:26,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,838 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 11:16:26,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 11:16:26,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 11:16:26,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 11:16:26,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (1/1) ... [2023-02-14 11:16:26,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:16:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:16:26,872 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) [2023-02-14 11:16:26,893 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 [2023-02-14 11:16:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 11:16:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 11:16:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 11:16:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 11:16:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2023-02-14 11:16:26,906 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2023-02-14 11:16:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 11:16:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 11:16:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 11:16:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2023-02-14 11:16:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure send [2023-02-14 11:16:26,907 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2023-02-14 11:16:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 11:16:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 11:16:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 11:16:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 11:16:26,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 11:16:27,054 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 11:16:27,073 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 11:16:27,441 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 11:16:27,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 11:16:27,459 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 11:16:27,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:16:27 BoogieIcfgContainer [2023-02-14 11:16:27,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 11:16:27,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 11:16:27,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 11:16:27,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 11:16:27,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:16:26" (1/3) ... [2023-02-14 11:16:27,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4661b135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:16:27, skipping insertion in model container [2023-02-14 11:16:27,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:16:26" (2/3) ... [2023-02-14 11:16:27,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4661b135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:16:27, skipping insertion in model container [2023-02-14 11:16:27,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:16:27" (3/3) ... [2023-02-14 11:16:27,467 INFO L112 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2023-02-14 11:16:27,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 11:16:27,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-14 11:16:27,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 11:16:27,514 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2778d153, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 11:16:27,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-14 11:16:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 37 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 11:16:27,524 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:27,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:27,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2117090455, now seen corresponding path program 1 times [2023-02-14 11:16:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624405829] [2023-02-14 11:16:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624405829] [2023-02-14 11:16:27,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624405829] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:16:27,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:16:27,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 11:16:27,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914118754] [2023-02-14 11:16:27,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:16:27,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 11:16:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:27,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 11:16:27,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:16:27,684 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 37 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:27,706 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2023-02-14 11:16:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 11:16:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 11:16:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:27,713 INFO L225 Difference]: With dead ends: 72 [2023-02-14 11:16:27,713 INFO L226 Difference]: Without dead ends: 41 [2023-02-14 11:16:27,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 11:16:27,721 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:27,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:16:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-14 11:16:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-14 11:16:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-02-14 11:16:27,752 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2023-02-14 11:16:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:27,752 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-02-14 11:16:27,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-02-14 11:16:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 11:16:27,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:27,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 11:16:27,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1351761174, now seen corresponding path program 1 times [2023-02-14 11:16:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:27,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360814816] [2023-02-14 11:16:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:27,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:27,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360814816] [2023-02-14 11:16:27,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360814816] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:16:27,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:16:27,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:16:27,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731177662] [2023-02-14 11:16:27,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:16:27,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:16:27,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:16:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:16:27,965 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:28,053 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2023-02-14 11:16:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 11:16:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 11:16:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:28,055 INFO L225 Difference]: With dead ends: 75 [2023-02-14 11:16:28,055 INFO L226 Difference]: Without dead ends: 53 [2023-02-14 11:16:28,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:16:28,056 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:28,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 114 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:16:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-14 11:16:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2023-02-14 11:16:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-02-14 11:16:28,063 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 9 [2023-02-14 11:16:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:28,064 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-02-14 11:16:28,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-02-14 11:16:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 11:16:28,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:28,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:28,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 11:16:28,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:28,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2000471293, now seen corresponding path program 1 times [2023-02-14 11:16:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:28,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294208181] [2023-02-14 11:16:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:28,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294208181] [2023-02-14 11:16:28,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294208181] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:16:28,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:16:28,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:16:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812259559] [2023-02-14 11:16:28,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:16:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:16:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:16:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:16:28,160 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:28,230 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-02-14 11:16:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:16:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 11:16:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:28,237 INFO L225 Difference]: With dead ends: 59 [2023-02-14 11:16:28,237 INFO L226 Difference]: Without dead ends: 43 [2023-02-14 11:16:28,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:16:28,239 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:28,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 128 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:16:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-14 11:16:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-14 11:16:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-02-14 11:16:28,246 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 11 [2023-02-14 11:16:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:28,246 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-02-14 11:16:28,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-02-14 11:16:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 11:16:28,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:28,248 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:28,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 11:16:28,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1234633309, now seen corresponding path program 1 times [2023-02-14 11:16:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:28,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455339978] [2023-02-14 11:16:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:16:28,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455339978] [2023-02-14 11:16:28,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455339978] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:16:28,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:16:28,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 11:16:28,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458678052] [2023-02-14 11:16:28,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:16:28,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 11:16:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 11:16:28,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:16:28,299 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:28,307 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-02-14 11:16:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 11:16:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-14 11:16:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:28,308 INFO L225 Difference]: With dead ends: 46 [2023-02-14 11:16:28,308 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 11:16:28,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:16:28,309 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:28,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:16:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 11:16:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-14 11:16:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-14 11:16:28,314 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 14 [2023-02-14 11:16:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:28,314 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-14 11:16:28,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-14 11:16:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 11:16:28,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:28,315 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:28,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 11:16:28,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:28,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1234631387, now seen corresponding path program 1 times [2023-02-14 11:16:28,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:28,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116615582] [2023-02-14 11:16:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:28,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:28,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116615582] [2023-02-14 11:16:28,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116615582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:16:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565522198] [2023-02-14 11:16:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:28,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:16:28,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:16:28,610 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) [2023-02-14 11:16:28,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 11:16:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:28,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-14 11:16:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:16:28,746 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 11:16:28,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 11:16:28,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:28,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:28,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:28,785 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 11:16:28,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 11:16:28,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:16:28,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:16:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:28,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:16:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:28,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565522198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:16:28,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:16:28,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-14 11:16:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975434609] [2023-02-14 11:16:28,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:16:28,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 11:16:28,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 11:16:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:16:28,935 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:29,042 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2023-02-14 11:16:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:16:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-14 11:16:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:29,043 INFO L225 Difference]: With dead ends: 87 [2023-02-14 11:16:29,043 INFO L226 Difference]: Without dead ends: 64 [2023-02-14 11:16:29,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:16:29,044 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:29,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 137 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:16:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-14 11:16:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2023-02-14 11:16:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 43 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-14 11:16:29,053 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2023-02-14 11:16:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:29,053 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-14 11:16:29,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-14 11:16:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 11:16:29,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:29,054 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:29,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 11:16:29,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:16:29,257 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1109742724, now seen corresponding path program 1 times [2023-02-14 11:16:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:29,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817658655] [2023-02-14 11:16:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:29,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817658655] [2023-02-14 11:16:29,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817658655] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:16:29,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894777138] [2023-02-14 11:16:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:29,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:16:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:16:29,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:16:29,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 11:16:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:29,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-14 11:16:29,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:16:29,717 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 11:16:29,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 11:16:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:29,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:29,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:29,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:29,757 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 11:16:29,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 11:16:29,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:16:29,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:16:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:29,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:16:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:29,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894777138] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:16:29,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:16:29,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-14 11:16:29,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581187431] [2023-02-14 11:16:29,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:16:29,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 11:16:29,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:29,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 11:16:29,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:16:29,957 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:30,108 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-02-14 11:16:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 11:16:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 11:16:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:30,109 INFO L225 Difference]: With dead ends: 70 [2023-02-14 11:16:30,109 INFO L226 Difference]: Without dead ends: 54 [2023-02-14 11:16:30,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:16:30,110 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:30,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:16:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-14 11:16:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2023-02-14 11:16:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-02-14 11:16:30,114 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 16 [2023-02-14 11:16:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:30,115 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-02-14 11:16:30,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-02-14 11:16:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 11:16:30,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:30,115 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:30,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 11:16:30,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-14 11:16:30,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1773797748, now seen corresponding path program 1 times [2023-02-14 11:16:30,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:30,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954171208] [2023-02-14 11:16:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:30,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:31,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 11:16:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:31,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:31,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954171208] [2023-02-14 11:16:31,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954171208] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:16:31,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930617379] [2023-02-14 11:16:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:31,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:16:31,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:16:31,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:16:31,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 11:16:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:31,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-14 11:16:31,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:16:31,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-14 11:16:31,491 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-14 11:16:31,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-14 11:16:31,520 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:16:31,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:16:31,549 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:16:31,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:16:31,584 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-14 11:16:31,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 60 [2023-02-14 11:16:31,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:16:31,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:16:31,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 11:16:31,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:16:31,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:16:31,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:16:31,734 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:16:31,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 5 [2023-02-14 11:16:31,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:16:31,754 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:16:31,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2023-02-14 11:16:31,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-14 11:16:32,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:32,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:32,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2023-02-14 11:16:32,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 11:16:32,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:32,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:32,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-02-14 11:16:32,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-02-14 11:16:32,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-14 11:16:32,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 11:16:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:32,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:16:32,419 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-14 11:16:32,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2023-02-14 11:16:32,427 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 11:16:32,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2023-02-14 11:16:32,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-02-14 11:16:32,528 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-14 11:16:32,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2023-02-14 11:16:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:32,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930617379] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:16:32,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:16:32,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 26 [2023-02-14 11:16:32,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992725892] [2023-02-14 11:16:32,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:16:32,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 11:16:32,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:32,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 11:16:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-02-14 11:16:32,608 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:16:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:33,585 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2023-02-14 11:16:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:16:33,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-02-14 11:16:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:33,587 INFO L225 Difference]: With dead ends: 90 [2023-02-14 11:16:33,587 INFO L226 Difference]: Without dead ends: 67 [2023-02-14 11:16:33,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 11:16:33,588 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:33,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 484 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:16:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-14 11:16:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-02-14 11:16:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-02-14 11:16:33,601 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 20 [2023-02-14 11:16:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:33,602 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-02-14 11:16:33,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 25 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:16:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-02-14 11:16:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 11:16:33,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:33,603 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:16:33,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 11:16:33,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:16:33,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash 152213004, now seen corresponding path program 2 times [2023-02-14 11:16:33,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:33,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799763531] [2023-02-14 11:16:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:33,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:16:34,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799763531] [2023-02-14 11:16:34,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799763531] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:16:34,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907146473] [2023-02-14 11:16:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:16:34,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:16:34,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:16:34,143 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:16:34,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 11:16:34,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:16:34,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:16:34,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 11:16:34,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:16:34,271 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 11:16:34,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 11:16:34,305 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-14 11:16:34,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-14 11:16:34,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:34,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:34,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-02-14 11:16:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:34,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:34,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:16:34,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:16:34,423 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-02-14 11:16:34,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-02-14 11:16:34,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:16:34,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:16:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:16:34,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:16:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:16:35,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907146473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:16:35,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:16:35,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-14 11:16:35,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332014571] [2023-02-14 11:16:35,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:16:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 11:16:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:16:35,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 11:16:35,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=68, Unknown=1, NotChecked=0, Total=110 [2023-02-14 11:16:35,548 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:16:35,772 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2023-02-14 11:16:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:16:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-14 11:16:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:16:35,773 INFO L225 Difference]: With dead ends: 98 [2023-02-14 11:16:35,773 INFO L226 Difference]: Without dead ends: 75 [2023-02-14 11:16:35,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=82, Unknown=1, NotChecked=0, Total=132 [2023-02-14 11:16:35,774 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 81 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:16:35,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 162 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:16:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-14 11:16:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2023-02-14 11:16:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 54 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:16:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-02-14 11:16:35,781 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 19 [2023-02-14 11:16:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:16:35,782 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-02-14 11:16:35,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:16:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-02-14 11:16:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 11:16:35,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:16:35,785 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] [2023-02-14 11:16:35,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 11:16:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:16:35,992 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:16:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:16:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 16596088, now seen corresponding path program 1 times [2023-02-14 11:16:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:16:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500283777] [2023-02-14 11:16:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:16:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:16:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 11:16:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:16:57,226 WARN L233 SmtUtils]: Spent 9.71s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:17:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:08,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:17:08,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500283777] [2023-02-14 11:17:08,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500283777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:08,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89296412] [2023-02-14 11:17:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:08,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:17:08,624 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:17:08,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 11:17:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:08,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-14 11:17:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:17:08,773 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 11:17:08,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 11:17:08,853 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-14 11:17:08,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-14 11:17:08,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:17:08,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:17:09,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 11:17:09,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 11:17:09,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 11:17:09,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 18 [2023-02-14 11:17:09,155 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_865 (Array Int Int)) (v_arrayElimArr_8 (Array Int Int)) (v_ArrVal_867 (Array Int Int)) (|v_append_to_queue_~#p.base_18| Int) (append_to_queue_~node~0.base Int) (v_ArrVal_883 (Array Int Int)) (v_ArrVal_871 (Array Int Int))) (and (= (select |c_old(#valid)| |v_append_to_queue_~#p.base_18|) 0) (= (select v_arrayElimArr_8 8) |c_append_to_queue_#in~p.payload.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |v_append_to_queue_~#p.base_18| v_arrayElimArr_8) append_to_queue_~node~0.base v_ArrVal_883) |c_append_to_queue_#in~q.base| v_ArrVal_867) |c_#memory_$Pointer$.base|) (< append_to_queue_~node~0.base |c_#StackHeapBarrier|) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |v_append_to_queue_~#p.base_18| v_ArrVal_876))) (store (store .cse0 append_to_queue_~node~0.base v_ArrVal_865) |c_append_to_queue_#in~q.base| (store (select (store .cse0 append_to_queue_~node~0.base v_ArrVal_871) |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset| 0))) |c_#memory_$Pointer$.offset|))) is different from true [2023-02-14 11:17:09,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,308 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-02-14 11:17:09,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 249 [2023-02-14 11:17:09,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,378 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-02-14 11:17:09,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 58 [2023-02-14 11:17:09,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:09,427 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-14 11:17:09,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 11:17:09,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:09,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-14 11:17:09,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-14 11:17:09,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-02-14 11:17:09,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-02-14 11:17:09,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:09,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:09,678 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:09,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 125 [2023-02-14 11:17:09,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:09,715 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:09,731 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-02-14 11:17:09,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 150 [2023-02-14 11:17:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:09,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 16 [2023-02-14 11:17:09,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:09,862 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-02-14 11:17:09,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 60 [2023-02-14 11:17:10,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:17:10,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-02-14 11:17:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:10,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:17:10,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 11:17:10,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2023-02-14 11:17:10,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-14 11:17:11,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89296412] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:11,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:17:11,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2023-02-14 11:17:11,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838077866] [2023-02-14 11:17:11,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:17:11,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:17:11,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:17:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:17:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=137, Unknown=1, NotChecked=24, Total=210 [2023-02-14 11:17:11,357 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:17:16,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 11:17:19,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 11:17:21,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 11:17:24,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:17:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:17:24,538 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2023-02-14 11:17:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 11:17:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-14 11:17:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:17:24,540 INFO L225 Difference]: With dead ends: 112 [2023-02-14 11:17:24,540 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 11:17:24,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=79, Invalid=266, Unknown=1, NotChecked=34, Total=380 [2023-02-14 11:17:24,540 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 23 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:17:24,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 222 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 211 Invalid, 4 Unknown, 95 Unchecked, 11.3s Time] [2023-02-14 11:17:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 11:17:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2023-02-14 11:17:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 60 states have internal predecessors, (76), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 11:17:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2023-02-14 11:17:24,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 21 [2023-02-14 11:17:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:17:24,548 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2023-02-14 11:17:24,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:17:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2023-02-14 11:17:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 11:17:24,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:17:24,560 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] [2023-02-14 11:17:24,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 11:17:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:24,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:17:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:17:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1658546872, now seen corresponding path program 1 times [2023-02-14 11:17:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:17:24,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253502871] [2023-02-14 11:17:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:24,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:17:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:25,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 11:17:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:25,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:17:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253502871] [2023-02-14 11:17:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253502871] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138647922] [2023-02-14 11:17:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:25,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:25,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:17:25,469 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:17:25,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 11:17:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-14 11:17:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:17:25,739 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-14 11:17:25,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-02-14 11:17:25,800 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-14 11:17:25,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-14 11:17:25,826 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:25,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:25,851 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:25,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:25,881 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-14 11:17:25,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 60 [2023-02-14 11:17:25,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:25,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:25,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:25,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 11:17:25,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:25,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:25,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2023-02-14 11:17:25,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-14 11:17:25,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-02-14 11:17:25,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:26,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:26,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:26,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-02-14 11:17:26,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2023-02-14 11:17:26,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:17:26,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-02-14 11:17:26,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2023-02-14 11:17:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:26,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:17:26,887 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-14 11:17:26,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2023-02-14 11:17:26,902 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 11:17:26,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2023-02-14 11:17:26,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-02-14 11:17:26,995 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-14 11:17:26,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2023-02-14 11:17:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:27,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138647922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:17:27,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:17:27,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2023-02-14 11:17:27,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871640087] [2023-02-14 11:17:27,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:17:27,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 11:17:27,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:17:27,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 11:17:27,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=692, Unknown=2, NotChecked=0, Total=812 [2023-02-14 11:17:27,117 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 29 states, 25 states have (on average 2.04) internal successors, (51), 28 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:17:28,012 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_$Pointer$.offset| |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset|) 0)) (.cse3 (select (select |c_#memory_$Pointer$.base| |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset|))) (let ((.cse4 (and (= .cse3 |c_append_to_queue_#in~q.base|) .cse0 (< .cse3 |c_#StackHeapBarrier|)))) (and (or (and .cse0 (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_15 (Array Int Int)) (v_DerPreprocessor_16 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int))) (let ((.cse2 (select v_DerPreprocessor_19 |c_append_to_queue_#in~q.offset|))) (let ((.cse1 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse2 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse2))) (and (= .cse1 v_DerPreprocessor_18) (= (select v_DerPreprocessor_16 |c_append_to_queue_#in~q.offset|) 0) (= |c_append_to_queue_#in~p.size| (select (select |c_#memory_int| .cse2) 0)) (= .cse2 .cse3) (< .cse2 |c_#StackHeapBarrier|) (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse2 v_DerPreprocessor_15) |c_append_to_queue_#in~q.base| v_DerPreprocessor_16) .cse2 v_DerPreprocessor_15) |c_append_to_queue_#in~q.base| v_DerPreprocessor_16) .cse2) v_DerPreprocessor_15) (= .cse1 (select |c_#memory_$Pointer$.base| .cse2))))))) .cse4 (and .cse0 (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int))) (let ((.cse5 (select v_DerPreprocessor_19 |c_append_to_queue_#in~q.offset|))) (and (not (= .cse5 |c_append_to_queue_#in~q.base|)) (= |c_append_to_queue_#in~p.size| (select (select |c_#memory_int| .cse5) 0)) (= .cse5 .cse3) (< .cse5 |c_#StackHeapBarrier|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse5 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse5) (select |c_#memory_$Pointer$.base| .cse5))))))) (or (and (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int))) (let ((.cse6 (select v_DerPreprocessor_19 |c_append_to_queue_#in~q.offset|))) (and (= |c_append_to_queue_#in~p.size| (select (select |c_#memory_int| .cse6) 0)) (= .cse6 .cse3) (< .cse6 |c_#StackHeapBarrier|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse6 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse6) (select |c_#memory_$Pointer$.base| .cse6))))) .cse0) (and .cse0 (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_16 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int))) (let ((.cse7 (select v_DerPreprocessor_19 |c_append_to_queue_#in~q.offset|))) (and (= (select v_DerPreprocessor_16 |c_append_to_queue_#in~q.offset|) 0) (= |c_append_to_queue_#in~p.size| (select (select |c_#memory_int| .cse7) 0)) (= .cse7 .cse3) (< .cse7 |c_#StackHeapBarrier|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse7 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse7 v_DerPreprocessor_18) |c_append_to_queue_#in~q.base| v_DerPreprocessor_19) .cse7) (select |c_#memory_$Pointer$.base| .cse7)))))) .cse4)))) is different from true [2023-02-14 11:17:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:17:28,570 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2023-02-14 11:17:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 11:17:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.04) internal successors, (51), 28 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-02-14 11:17:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:17:28,575 INFO L225 Difference]: With dead ends: 111 [2023-02-14 11:17:28,575 INFO L226 Difference]: Without dead ends: 109 [2023-02-14 11:17:28,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=1187, Unknown=3, NotChecked=72, Total=1482 [2023-02-14 11:17:28,583 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 93 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:17:28,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 611 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 691 Invalid, 1 Unknown, 6 Unchecked, 1.0s Time] [2023-02-14 11:17:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-14 11:17:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 77. [2023-02-14 11:17:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 66 states have (on average 1.303030303030303) internal successors, (86), 67 states have internal predecessors, (86), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:17:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2023-02-14 11:17:28,622 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 21 [2023-02-14 11:17:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:17:28,622 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2023-02-14 11:17:28,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.04) internal successors, (51), 28 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:17:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2023-02-14 11:17:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 11:17:28,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:17:28,626 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] [2023-02-14 11:17:28,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 11:17:28,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:28,831 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:17:28,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:17:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash -522334197, now seen corresponding path program 1 times [2023-02-14 11:17:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:17:28,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436415055] [2023-02-14 11:17:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:28,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:17:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 11:17:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:29,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:17:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436415055] [2023-02-14 11:17:29,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436415055] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:17:29,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:17:29,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 11:17:29,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830639485] [2023-02-14 11:17:29,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:17:29,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 11:17:29,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:17:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 11:17:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 11:17:29,016 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 11:17:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:17:29,233 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2023-02-14 11:17:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 11:17:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-02-14 11:17:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:17:29,235 INFO L225 Difference]: With dead ends: 104 [2023-02-14 11:17:29,235 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 11:17:29,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:17:29,235 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:17:29,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 181 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:17:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 11:17:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-02-14 11:17:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.267605633802817) internal successors, (90), 72 states have internal predecessors, (90), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:17:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2023-02-14 11:17:29,250 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 22 [2023-02-14 11:17:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:17:29,251 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2023-02-14 11:17:29,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 11:17:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2023-02-14 11:17:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 11:17:29,252 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:17:29,253 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:17:29,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 11:17:29,253 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:17:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:17:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash 207855267, now seen corresponding path program 2 times [2023-02-14 11:17:29,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:17:29,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692276100] [2023-02-14 11:17:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:29,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:17:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:17:29,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692276100] [2023-02-14 11:17:29,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692276100] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:29,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718983797] [2023-02-14 11:17:29,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:17:29,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:29,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:17:29,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:17:29,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 11:17:29,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:17:29,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:17:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 11:17:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:17:29,790 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 11:17:29,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-14 11:17:29,829 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-14 11:17:29,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-14 11:17:29,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:17:29,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:17:29,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-02-14 11:17:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:29,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:17:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:29,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:17:29,911 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 11:17:29,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 11:17:29,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:17:29,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:17:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:17:29,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:17:30,039 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_24| Int) (v_ArrVal_1493 Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_38| Int)) (or (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_1493) |v_ULTIMATE.start_main_~#new_packet~0#1.base_24| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_38|) 0)) (forall ((v_ArrVal_1495 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_1495) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)))) (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_24| Int) (v_ArrVal_1493 Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_38| Int)) (or (forall ((v_ArrVal_1499 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_38| v_ArrVal_1499) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) 0)) (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_1493) |v_ULTIMATE.start_main_~#new_packet~0#1.base_24| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_38|) 0))))) is different from false [2023-02-14 11:17:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-14 11:17:30,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718983797] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:17:30,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:17:30,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-14 11:17:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973131448] [2023-02-14 11:17:30,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:17:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 11:17:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:17:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 11:17:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=56, Unknown=2, NotChecked=16, Total=110 [2023-02-14 11:17:30,329 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:17:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:17:30,592 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2023-02-14 11:17:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 11:17:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-14 11:17:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:17:30,593 INFO L225 Difference]: With dead ends: 99 [2023-02-14 11:17:30,593 INFO L226 Difference]: Without dead ends: 83 [2023-02-14 11:17:30,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=68, Unknown=2, NotChecked=18, Total=132 [2023-02-14 11:17:30,594 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:17:30,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 214 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2023-02-14 11:17:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-14 11:17:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2023-02-14 11:17:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.265625) internal successors, (81), 65 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:17:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2023-02-14 11:17:30,602 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 21 [2023-02-14 11:17:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:17:30,602 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2023-02-14 11:17:30,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:17:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2023-02-14 11:17:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 11:17:30,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:17:30,603 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] [2023-02-14 11:17:30,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 11:17:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:30,803 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:17:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:17:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1270982129, now seen corresponding path program 1 times [2023-02-14 11:17:30,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:17:30,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446030183] [2023-02-14 11:17:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:30,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:17:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 11:17:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:31,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:17:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446030183] [2023-02-14 11:17:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446030183] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509775921] [2023-02-14 11:17:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:17:31,411 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:17:31,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 11:17:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 11:17:31,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:17:31,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-02-14 11:17:31,730 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-14 11:17:31,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-14 11:17:31,756 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:31,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:31,783 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:31,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:31,815 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2023-02-14 11:17:31,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 60 [2023-02-14 11:17:31,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:31,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:31,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 11:17:31,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:31,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:31,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:31,932 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:31,934 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:31,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2023-02-14 11:17:31,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-14 11:17:31,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-02-14 11:17:31,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:32,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-02-14 11:17:32,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:17:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:32,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:17:32,418 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-14 11:17:32,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 92 [2023-02-14 11:17:32,426 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 11:17:32,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 62 [2023-02-14 11:17:32,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-14 11:17:32,555 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-14 11:17:32,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 1 [2023-02-14 11:17:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:32,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509775921] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:17:32,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:17:32,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 22 [2023-02-14 11:17:32,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990257285] [2023-02-14 11:17:32,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:17:32,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 11:17:32,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:17:32,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 11:17:32,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-02-14 11:17:32,631 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 22 states, 19 states have (on average 2.526315789473684) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:17:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:17:33,278 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2023-02-14 11:17:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 11:17:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.526315789473684) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-02-14 11:17:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:17:33,279 INFO L225 Difference]: With dead ends: 98 [2023-02-14 11:17:33,279 INFO L226 Difference]: Without dead ends: 96 [2023-02-14 11:17:33,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-02-14 11:17:33,280 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 117 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:17:33,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 390 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:17:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-14 11:17:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2023-02-14 11:17:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.273972602739726) internal successors, (93), 74 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:17:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2023-02-14 11:17:33,291 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 23 [2023-02-14 11:17:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:17:33,291 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2023-02-14 11:17:33,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.526315789473684) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:17:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2023-02-14 11:17:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 11:17:33,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:17:33,292 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] [2023-02-14 11:17:33,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 11:17:33,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 11:17:33,493 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:17:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:17:33,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1270980207, now seen corresponding path program 1 times [2023-02-14 11:17:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:17:33,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446471043] [2023-02-14 11:17:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:33,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:17:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:34,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 11:17:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:34,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:17:34,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446471043] [2023-02-14 11:17:34,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446471043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:34,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370415087] [2023-02-14 11:17:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:34,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:17:34,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:17:34,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 11:17:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-14 11:17:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:17:34,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-02-14 11:17:34,657 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-14 11:17:34,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-02-14 11:17:34,711 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-14 11:17:34,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-14 11:17:34,737 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:34,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:34,762 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:34,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:34,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:34,804 INFO L321 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2023-02-14 11:17:34,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-02-14 11:17:34,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:34,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 11:17:34,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:34,882 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:34,883 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:34,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 5 [2023-02-14 11:17:34,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:34,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2023-02-14 11:17:34,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-14 11:17:34,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:35,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-02-14 11:17:35,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:17:35,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-02-14 11:17:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:35,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:17:35,515 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-14 11:17:35,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 79 [2023-02-14 11:17:35,522 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 11:17:35,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2023-02-14 11:17:35,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-02-14 11:17:35,632 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2023-02-14 11:17:35,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 1 [2023-02-14 11:17:35,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 11:17:35,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2660 treesize of output 2588 [2023-02-14 11:17:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:36,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370415087] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:17:36,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:17:36,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2023-02-14 11:17:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734605613] [2023-02-14 11:17:36,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:17:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 11:17:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:17:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 11:17:36,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-02-14 11:17:36,251 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 30 states, 27 states have (on average 2.0) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:17:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:17:37,328 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2023-02-14 11:17:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 11:17:37,329 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.0) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-02-14 11:17:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:17:37,330 INFO L225 Difference]: With dead ends: 123 [2023-02-14 11:17:37,330 INFO L226 Difference]: Without dead ends: 111 [2023-02-14 11:17:37,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 11:17:37,331 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 241 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 11:17:37,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 507 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 11:17:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-14 11:17:37,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2023-02-14 11:17:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 74 states have internal predecessors, (92), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:17:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2023-02-14 11:17:37,350 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 23 [2023-02-14 11:17:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:17:37,350 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2023-02-14 11:17:37,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.0) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:17:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2023-02-14 11:17:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 11:17:37,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:17:37,351 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:17:37,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 11:17:37,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 11:17:37,557 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:17:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:17:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1942876957, now seen corresponding path program 1 times [2023-02-14 11:17:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:17:37,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653324935] [2023-02-14 11:17:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:17:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:38,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 11:17:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:38,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:17:38,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653324935] [2023-02-14 11:17:38,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653324935] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:38,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836596300] [2023-02-14 11:17:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:38,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:17:38,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:17:38,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:17:38,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 11:17:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-14 11:17:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:17:39,184 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 11:17:39,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 11:17:39,244 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-14 11:17:39,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-14 11:17:39,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-14 11:17:39,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 11:17:39,469 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2023-02-14 11:17:39,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2023-02-14 11:17:39,495 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:39,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:39,521 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 11:17:39,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 11:17:39,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:39,563 INFO L321 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2023-02-14 11:17:39,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-02-14 11:17:39,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:39,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 11:17:39,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 11:17:39,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:39,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:39,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:39,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-02-14 11:17:39,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 11:17:39,748 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-14 11:17:39,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 144 [2023-02-14 11:17:39,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 110 [2023-02-14 11:17:40,130 INFO L321 Elim1Store]: treesize reduction 249, result has 32.5 percent of original size [2023-02-14 11:17:40,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 128 treesize of output 272 [2023-02-14 11:17:40,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:40,257 INFO L321 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2023-02-14 11:17:40,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 65 [2023-02-14 11:17:40,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-02-14 11:17:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:40,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:17:40,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:40,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-02-14 11:17:40,739 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 11:17:40,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 11:17:40,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:17:40,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-14 11:17:40,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-14 11:17:40,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:17:40,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2023-02-14 11:17:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:17:40,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:17:41,480 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2023-02-14 11:17:41,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 104 treesize of output 126 [2023-02-14 11:17:41,495 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 11:17:41,644 INFO L321 Elim1Store]: treesize reduction 66, result has 62.7 percent of original size [2023-02-14 11:17:41,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 296 treesize of output 362 [2023-02-14 11:17:41,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 191 [2023-02-14 11:17:41,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 258 [2023-02-14 11:17:41,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 11:17:41,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 190 [2023-02-14 11:17:41,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 11:17:41,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 123 [2023-02-14 11:17:43,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836596300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:17:43,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:17:43,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2023-02-14 11:17:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387118665] [2023-02-14 11:17:43,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:17:43,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 11:17:43,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:17:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 11:17:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=1, NotChecked=0, Total=812 [2023-02-14 11:17:43,895 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:17:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:17:46,034 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2023-02-14 11:17:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 11:17:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-14 11:17:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:17:46,035 INFO L225 Difference]: With dead ends: 133 [2023-02-14 11:17:46,035 INFO L226 Difference]: Without dead ends: 110 [2023-02-14 11:17:46,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=328, Invalid=1741, Unknown=1, NotChecked=0, Total=2070 [2023-02-14 11:17:46,036 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:17:46,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 326 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 11:17:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-14 11:17:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2023-02-14 11:17:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 80 states have (on average 1.275) internal successors, (102), 81 states have internal predecessors, (102), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:17:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2023-02-14 11:17:46,064 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 25 [2023-02-14 11:17:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:17:46,064 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2023-02-14 11:17:46,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:17:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2023-02-14 11:17:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 11:17:46,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:17:46,066 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:17:46,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-14 11:17:46,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 11:17:46,275 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:17:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:17:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1557464423, now seen corresponding path program 1 times [2023-02-14 11:17:46,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:17:46,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130100261] [2023-02-14 11:17:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:17:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:17:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:17:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 11:17:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:18:41,268 WARN L233 SmtUtils]: Spent 25.26s on a formula simplification that was a NOOP. DAG size: 181 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:19:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:19:06,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:19:06,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130100261] [2023-02-14 11:19:06,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130100261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:19:06,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424624614] [2023-02-14 11:19:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:19:06,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:19:06,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:19:06,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:19:06,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 11:19:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:19:07,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-14 11:19:07,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:19:07,075 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 11:19:07,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 11:19:07,179 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2023-02-14 11:19:07,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 34 treesize of output 53 [2023-02-14 11:19:07,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:19:07,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:19:07,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 11:19:07,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 11:19:07,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 11:19:07,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 18 [2023-02-14 11:19:07,649 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2835 (Array Int Int)) (v_ArrVal_2833 (Array Int Int)) (v_ArrVal_2831 (Array Int Int)) (|v_append_to_queue_~#p.base_73| Int) (v_ArrVal_2819 (Array Int Int)) (append_to_queue_~node~0.base Int) (v_ArrVal_2834 Int) (v_ArrVal_2822 Int) (v_ArrVal_2827 (Array Int Int)) (v_arrayElimArr_42 (Array Int Int)) (v_ArrVal_2824 Int)) (and (= (select |c_old(#valid)| |v_append_to_queue_~#p.base_73|) 0) (= (store (store (store |c_old(#memory_$Pointer$.base)| |v_append_to_queue_~#p.base_73| v_arrayElimArr_42) append_to_queue_~node~0.base v_ArrVal_2819) |c_append_to_queue_#in~q.base| v_ArrVal_2833) |c_#memory_$Pointer$.base|) (= (select v_arrayElimArr_42 8) |c_append_to_queue_#in~p.payload.base|) (< append_to_queue_~node~0.base |c_#StackHeapBarrier|) (= |c_#valid| (store (store (store |c_old(#valid)| |v_append_to_queue_~#p.base_73| v_ArrVal_2824) append_to_queue_~node~0.base v_ArrVal_2822) |v_append_to_queue_~#p.base_73| v_ArrVal_2834)) (= |c_#memory_$Pointer$.offset| (store (store (store |c_old(#memory_$Pointer$.offset)| |v_append_to_queue_~#p.base_73| v_ArrVal_2831) append_to_queue_~node~0.base v_ArrVal_2835) |c_append_to_queue_#in~q.base| v_ArrVal_2827)))) is different from true [2023-02-14 11:19:07,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,718 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-02-14 11:19:07,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 52 [2023-02-14 11:19:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,748 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-02-14 11:19:07,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2023-02-14 11:19:07,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:07,809 INFO L321 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2023-02-14 11:19:07,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 62 [2023-02-14 11:19:07,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-14 11:19:07,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-02-14 11:19:08,076 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2023-02-14 11:19:08,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 75 treesize of output 105 [2023-02-14 11:19:34,298 WARN L233 SmtUtils]: Spent 22.04s on a formula simplification. DAG size of input: 55 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:19:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 11:19:34,367 INFO L321 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2023-02-14 11:19:34,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 75 [2023-02-14 11:19:34,390 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-02-14 11:19:34,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 62 [2023-02-14 11:19:34,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 11:19:34,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:19:34,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 11:19:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:19:34,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:19:34,956 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_34| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_60| Int) (v_ArrVal_2836 Int)) (or (forall ((v_ArrVal_2837 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_60| v_ArrVal_2837) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_2836) |v_ULTIMATE.start_main_~#new_packet~0#1.base_34| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_60|) 0)))) (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_34| Int) (|v_ULTIMATE.start_receive_~#packet~0#1.base_60| Int) (v_ArrVal_2836 Int)) (or (forall ((v_ArrVal_2839 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_60| v_ArrVal_2839) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (not (= (select (store (store |c_#valid| |c_ULTIMATE.start_main_~#new_packet~0#1.base| v_ArrVal_2836) |v_ULTIMATE.start_main_~#new_packet~0#1.base_34| 1) |v_ULTIMATE.start_receive_~#packet~0#1.base_60|) 0))))) is different from false [2023-02-14 11:19:35,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 11:19:35,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 90 [2023-02-14 11:19:35,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-14 11:19:37,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424624614] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:19:37,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 11:19:37,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2023-02-14 11:19:37,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709723338] [2023-02-14 11:19:37,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 11:19:37,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 11:19:37,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:19:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 11:19:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=221, Unknown=5, NotChecked=66, Total=380 [2023-02-14 11:19:37,551 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:19:52,861 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:20:00,952 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:20:09,051 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 11:20:11,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:13,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:15,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:17,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:25,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:27,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:29,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:31,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:33,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:35,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:37,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:39,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:41,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:43,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 11:20:45,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:47,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:49,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:53,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 11:20:56,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 11:20:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:20:56,153 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2023-02-14 11:20:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 11:20:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-14 11:20:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:20:56,169 INFO L225 Difference]: With dead ends: 151 [2023-02-14 11:20:56,169 INFO L226 Difference]: Without dead ends: 128 [2023-02-14 11:20:56,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 88.2s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=8, NotChecked=90, Total=650 [2023-02-14 11:20:56,169 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 100 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 22 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 45.9s IncrementalHoareTripleChecker+Time [2023-02-14 11:20:56,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 240 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 262 Invalid, 18 Unknown, 98 Unchecked, 45.9s Time] [2023-02-14 11:20:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-14 11:20:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2023-02-14 11:20:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 90 states have internal predecessors, (115), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 11:20:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2023-02-14 11:20:56,184 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 26 [2023-02-14 11:20:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:20:56,184 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2023-02-14 11:20:56,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:20:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2023-02-14 11:20:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 11:20:56,185 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:20:56,185 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:20:56,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 11:20:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 11:20:56,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:20:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:20:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1473268647, now seen corresponding path program 1 times [2023-02-14 11:20:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:20:56,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483627930] [2023-02-14 11:20:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:20:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 11:20:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:20:57,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:20:57,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483627930] [2023-02-14 11:20:57,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483627930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:20:57,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446367640] [2023-02-14 11:20:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:20:57,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:20:57,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:20:57,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:20:57,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 11:20:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:20:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 108 conjunts are in the unsatisfiable core [2023-02-14 11:20:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:20:57,766 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 11:20:57,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 11:20:57,826 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-02-14 11:20:57,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-02-14 11:20:57,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9