./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/ntdrivers/floppy.i.cil-3.c -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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:26:22,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:26:22,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:26:22,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:26:22,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:26:22,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:26:22,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:26:22,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:26:22,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:26:22,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:26:22,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:26:22,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:26:22,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:26:22,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:26:22,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:26:22,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:26:22,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:26:22,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:26:22,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:26:22,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:26:22,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:26:22,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:26:22,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:26:22,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:26:22,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:26:22,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:26:22,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:26:22,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:26:22,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:26:22,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:26:22,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:26:22,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:26:22,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:26:22,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:26:22,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:26:22,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:26:22,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:26:22,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:26:22,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:26:22,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:26:22,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:26:22,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:26:22,815 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:26:22,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:26:22,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:26:22,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:26:22,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:26:22,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:26:22,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:26:22,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:26:22,817 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:26:22,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:26:22,817 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:26:22,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:26:22,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:26:22,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:26:22,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:26:22,820 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:26:22,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2023-02-15 19:26:23,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:26:23,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:26:23,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:26:23,044 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:26:23,045 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:26:23,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-15 19:26:24,014 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:26:24,438 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:26:24,438 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-15 19:26:24,463 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca054742/ffc4a93c2adb4c73918d7578a01fd38b/FLAG1f441b612 [2023-02-15 19:26:24,485 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca054742/ffc4a93c2adb4c73918d7578a01fd38b [2023-02-15 19:26:24,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:26:24,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:26:24,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:26:24,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:26:24,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:26:24,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:26:24" (1/1) ... [2023-02-15 19:26:24,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4886b36c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:24, skipping insertion in model container [2023-02-15 19:26:24,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:26:24" (1/1) ... [2023-02-15 19:26:24,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:26:24,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:26:24,983 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/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-02-15 19:26:25,017 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-15 19:26:25,024 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-15 19:26:25,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:26:25,384 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:26:25,434 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/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-02-15 19:26:25,441 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-15 19:26:25,442 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-15 19:26:25,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:26:25,644 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:26:25,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25 WrapperNode [2023-02-15 19:26:25,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:26:25,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:26:25,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:26:25,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:26:25,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,797 INFO L138 Inliner]: procedures = 128, calls = 2895, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3094 [2023-02-15 19:26:25,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:26:25,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:26:25,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:26:25,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:26:25,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,942 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:26:25,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:26:25,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:26:25,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:26:25,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (1/1) ... [2023-02-15 19:26:25,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:26:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:26:26,005 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) [2023-02-15 19:26:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2023-02-15 19:26:26,030 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2023-02-15 19:26:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-15 19:26:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-15 19:26:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-15 19:26:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 19:26:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-15 19:26:26,031 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-15 19:26:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2023-02-15 19:26:26,031 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2023-02-15 19:26:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2023-02-15 19:26:26,031 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2023-02-15 19:26:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 19:26:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2023-02-15 19:26:26,031 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2023-02-15 19:26:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-15 19:26:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-15 19:26:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2023-02-15 19:26:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2023-02-15 19:26:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-15 19:26:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-15 19:26:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-15 19:26:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-15 19:26:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2023-02-15 19:26:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2023-02-15 19:26:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2023-02-15 19:26:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2023-02-15 19:26:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 19:26:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:26:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2023-02-15 19:26:26,034 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2023-02-15 19:26:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2023-02-15 19:26:26,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2023-02-15 19:26:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 19:26:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 19:26:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-15 19:26:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-15 19:26:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 19:26:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2023-02-15 19:26:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2023-02-15 19:26:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 19:26:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-15 19:26:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-15 19:26:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-02-15 19:26:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-02-15 19:26:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:26:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-02-15 19:26:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-02-15 19:26:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2023-02-15 19:26:26,037 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2023-02-15 19:26:26,020 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 [2023-02-15 19:26:26,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-15 19:26:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-15 19:26:26,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-15 19:26:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:26:26,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:26:26,411 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:26:26,412 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:26:26,458 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,466 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-15 19:26:26,466 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-15 19:26:26,468 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,551 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-15 19:26:26,551 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-15 19:26:26,577 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,595 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-15 19:26:26,595 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-15 19:26:26,678 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,698 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2023-02-15 19:26:26,698 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2023-02-15 19:26:26,699 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,701 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,701 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,788 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2023-02-15 19:26:26,788 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-15 19:26:26,788 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-15 19:26:26,788 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2023-02-15 19:26:26,788 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2023-02-15 19:26:26,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2023-02-15 19:26:26,792 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,797 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:26,798 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,241 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2023-02-15 19:26:27,242 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2023-02-15 19:26:27,242 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2023-02-15 19:26:27,242 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2023-02-15 19:26:27,242 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2023-02-15 19:26:27,242 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2023-02-15 19:26:27,261 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,278 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-15 19:26:27,278 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-15 19:26:27,282 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,282 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,283 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,284 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,284 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,285 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,286 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:27,287 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2023-02-15 19:26:30,501 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2023-02-15 19:26:30,502 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2023-02-15 19:26:30,502 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2023-02-15 19:26:30,502 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2023-02-15 19:26:30,502 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2023-02-15 19:26:30,502 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2023-02-15 19:26:30,512 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:26:30,519 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:26:30,519 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 19:26:30,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:26:30 BoogieIcfgContainer [2023-02-15 19:26:30,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:26:30,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:26:30,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:26:30,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:26:30,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:26:24" (1/3) ... [2023-02-15 19:26:30,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69402614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:26:30, skipping insertion in model container [2023-02-15 19:26:30,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:26:25" (2/3) ... [2023-02-15 19:26:30,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69402614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:26:30, skipping insertion in model container [2023-02-15 19:26:30,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:26:30" (3/3) ... [2023-02-15 19:26:30,526 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2023-02-15 19:26:30,536 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:26:30,536 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:26:30,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:26:30,574 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;@5255c62f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:26:30,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:26:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2023-02-15 19:26:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 19:26:30,584 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:26:30,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:26:30,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:26:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:26:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2023-02-15 19:26:30,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:26:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103568073] [2023-02-15 19:26:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:26:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:26:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:31,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:26:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:31,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:26:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:26:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:26:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103568073] [2023-02-15 19:26:31,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103568073] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:26:31,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:26:31,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:26:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107736391] [2023-02-15 19:26:31,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:26:31,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:26:31,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:26:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:26:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:26:31,208 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:26:35,194 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 [] [2023-02-15 19:26:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:26:35,441 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2023-02-15 19:26:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:26:35,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-15 19:26:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:26:35,452 INFO L225 Difference]: With dead ends: 1174 [2023-02-15 19:26:35,453 INFO L226 Difference]: Without dead ends: 657 [2023-02-15 19:26:35,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:26:35,466 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 419 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 219 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:26:35,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 2054 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 887 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-15 19:26:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-15 19:26:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-15 19:26:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-15 19:26:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2023-02-15 19:26:35,552 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2023-02-15 19:26:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:26:35,553 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2023-02-15 19:26:35,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:26:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2023-02-15 19:26:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 19:26:35,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:26:35,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:26:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:26:35,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:26:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:26:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2023-02-15 19:26:35,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:26:35,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697942313] [2023-02-15 19:26:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:26:35,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:26:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:26:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:35,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:26:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:26:35,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:26:35,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697942313] [2023-02-15 19:26:35,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697942313] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:26:35,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:26:35,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:26:35,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991004721] [2023-02-15 19:26:35,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:26:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:26:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:26:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:26:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:26:35,840 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:39,496 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 [] [2023-02-15 19:26:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:26:39,710 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2023-02-15 19:26:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:26:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-15 19:26:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:26:39,715 INFO L225 Difference]: With dead ends: 1217 [2023-02-15 19:26:39,715 INFO L226 Difference]: Without dead ends: 657 [2023-02-15 19:26:39,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:26:39,718 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 381 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 213 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-15 19:26:39,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 2663 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1088 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-02-15 19:26:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-15 19:26:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-15 19:26:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-15 19:26:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2023-02-15 19:26:39,755 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2023-02-15 19:26:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:26:39,756 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2023-02-15 19:26:39,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2023-02-15 19:26:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 19:26:39,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:26:39,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:26:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 19:26:39,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:26:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:26:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2023-02-15 19:26:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:26:39,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044410077] [2023-02-15 19:26:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:26:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:26:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:40,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:26:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:40,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:26:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:26:40,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:26:40,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044410077] [2023-02-15 19:26:40,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044410077] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:26:40,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:26:40,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:26:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580419248] [2023-02-15 19:26:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:26:40,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:26:40,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:26:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:26:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:26:40,178 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:43,780 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 [] [2023-02-15 19:26:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:26:44,681 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2023-02-15 19:26:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:26:44,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-02-15 19:26:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:26:44,687 INFO L225 Difference]: With dead ends: 1542 [2023-02-15 19:26:44,687 INFO L226 Difference]: Without dead ends: 1127 [2023-02-15 19:26:44,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:26:44,689 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 1376 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:26:44,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2308 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1152 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-02-15 19:26:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-02-15 19:26:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2023-02-15 19:26:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2023-02-15 19:26:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2023-02-15 19:26:44,750 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2023-02-15 19:26:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:26:44,750 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2023-02-15 19:26:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2023-02-15 19:26:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 19:26:44,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:26:44,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:26:44,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 19:26:44,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:26:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:26:44,758 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2023-02-15 19:26:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:26:44,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357786566] [2023-02-15 19:26:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:26:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:26:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:45,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:26:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:45,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:26:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:45,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:26:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:26:45,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:26:45,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357786566] [2023-02-15 19:26:45,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357786566] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:26:45,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:26:45,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:26:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204722782] [2023-02-15 19:26:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:26:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:26:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:26:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:26:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:26:45,100 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 19:26:48,163 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 [] [2023-02-15 19:26:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:26:48,914 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2023-02-15 19:26:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:26:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2023-02-15 19:26:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:26:48,922 INFO L225 Difference]: With dead ends: 1879 [2023-02-15 19:26:48,923 INFO L226 Difference]: Without dead ends: 1860 [2023-02-15 19:26:48,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:26:48,925 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 1502 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 364 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-15 19:26:48,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 1947 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 926 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-15 19:26:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2023-02-15 19:26:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2023-02-15 19:26:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2023-02-15 19:26:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2023-02-15 19:26:49,049 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2023-02-15 19:26:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:26:49,049 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2023-02-15 19:26:49,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 19:26:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2023-02-15 19:26:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 19:26:49,050 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:26:49,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:26:49,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 19:26:49,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:26:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:26:49,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2023-02-15 19:26:49,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:26:49,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527847497] [2023-02-15 19:26:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:26:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:26:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:49,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:26:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:49,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:26:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:26:49,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:26:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527847497] [2023-02-15 19:26:49,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527847497] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:26:49,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:26:49,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:26:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364869907] [2023-02-15 19:26:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:26:49,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:26:49,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:26:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:26:49,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:26:49,216 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:52,416 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 [] [2023-02-15 19:26:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:26:52,741 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2023-02-15 19:26:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:26:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-02-15 19:26:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:26:52,749 INFO L225 Difference]: With dead ends: 1856 [2023-02-15 19:26:52,749 INFO L226 Difference]: Without dead ends: 1852 [2023-02-15 19:26:52,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:26:52,750 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 492 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 221 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:26:52,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1939 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 871 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-02-15 19:26:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2023-02-15 19:26:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2023-02-15 19:26:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2023-02-15 19:26:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2023-02-15 19:26:52,798 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2023-02-15 19:26:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:26:52,799 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2023-02-15 19:26:52,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2023-02-15 19:26:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 19:26:52,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:26:52,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:26:52,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 19:26:52,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:26:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:26:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2023-02-15 19:26:52,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:26:52,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428602893] [2023-02-15 19:26:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:26:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:26:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:52,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:26:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:52,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:26:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:26:52,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:26:52,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428602893] [2023-02-15 19:26:52,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428602893] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:26:52,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:26:52,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:26:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951953619] [2023-02-15 19:26:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:26:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:26:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:26:52,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:26:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:26:52,961 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:56,402 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 [] [2023-02-15 19:26:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:26:57,547 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2023-02-15 19:26:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:26:57,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-15 19:26:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:26:57,559 INFO L225 Difference]: With dead ends: 3293 [2023-02-15 19:26:57,571 INFO L226 Difference]: Without dead ends: 3290 [2023-02-15 19:26:57,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:26:57,574 INFO L413 NwaCegarLoop]: 1008 mSDtfsCounter, 958 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:26:57,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 2787 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1355 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 19:26:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2023-02-15 19:26:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2023-02-15 19:26:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2023-02-15 19:26:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2023-02-15 19:26:57,671 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2023-02-15 19:26:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:26:57,672 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2023-02-15 19:26:57,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:26:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2023-02-15 19:26:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 19:26:57,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:26:57,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:26:57,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 19:26:57,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:26:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:26:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2023-02-15 19:26:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:26:57,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076819121] [2023-02-15 19:26:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:26:57,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:26:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:26:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:57,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:26:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:57,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:26:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:57,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 19:26:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:26:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:26:57,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:26:57,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076819121] [2023-02-15 19:26:57,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076819121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:26:57,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:26:57,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:26:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313257732] [2023-02-15 19:26:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:26:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:26:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:26:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:26:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:26:57,875 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:27:01,579 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 [] [2023-02-15 19:27:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:02,996 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2023-02-15 19:27:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 19:27:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-02-15 19:27:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:03,012 INFO L225 Difference]: With dead ends: 3942 [2023-02-15 19:27:03,012 INFO L226 Difference]: Without dead ends: 3937 [2023-02-15 19:27:03,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-15 19:27:03,014 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 1306 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 545 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:03,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 2694 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 1848 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 19:27:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2023-02-15 19:27:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2023-02-15 19:27:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2023-02-15 19:27:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2023-02-15 19:27:03,145 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2023-02-15 19:27:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:03,145 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2023-02-15 19:27:03,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:27:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2023-02-15 19:27:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 19:27:03,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:03,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:03,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 19:27:03,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2023-02-15 19:27:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:03,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995855429] [2023-02-15 19:27:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:03,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:03,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:03,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995855429] [2023-02-15 19:27:03,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995855429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:03,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:03,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:27:03,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547342278] [2023-02-15 19:27:03,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:03,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:27:03,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:03,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:27:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:27:03,454 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:27:06,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:08,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:09,573 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2023-02-15 19:27:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:27:09,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2023-02-15 19:27:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:09,588 INFO L225 Difference]: With dead ends: 7046 [2023-02-15 19:27:09,588 INFO L226 Difference]: Without dead ends: 4021 [2023-02-15 19:27:09,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:27:09,597 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 2405 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 682 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:09,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 2159 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 1285 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2023-02-15 19:27:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2023-02-15 19:27:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2023-02-15 19:27:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2023-02-15 19:27:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2023-02-15 19:27:09,758 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2023-02-15 19:27:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:09,758 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2023-02-15 19:27:09,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:27:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2023-02-15 19:27:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 19:27:09,760 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:09,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 19:27:09,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2023-02-15 19:27:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243783246] [2023-02-15 19:27:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:09,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:09,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:09,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:09,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 19:27:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:09,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:09,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243783246] [2023-02-15 19:27:09,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243783246] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:09,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:09,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:27:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196138977] [2023-02-15 19:27:09,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:09,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:27:09,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:27:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:27:09,921 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 19:27:13,293 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 [] [2023-02-15 19:27:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:14,766 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2023-02-15 19:27:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:27:14,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-02-15 19:27:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:14,855 INFO L225 Difference]: With dead ends: 10834 [2023-02-15 19:27:14,855 INFO L226 Difference]: Without dead ends: 7785 [2023-02-15 19:27:14,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:27:14,868 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 2172 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 628 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:14,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 2569 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1381 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 19:27:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2023-02-15 19:27:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2023-02-15 19:27:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-15 19:27:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2023-02-15 19:27:15,281 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2023-02-15 19:27:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:15,283 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2023-02-15 19:27:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 19:27:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2023-02-15 19:27:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 19:27:15,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:15,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:15,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 19:27:15,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2023-02-15 19:27:15,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930001894] [2023-02-15 19:27:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:15,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:15,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 19:27:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:15,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 19:27:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:15,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:15,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930001894] [2023-02-15 19:27:15,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930001894] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:15,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:15,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:27:15,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596588017] [2023-02-15 19:27:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:15,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:27:15,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:27:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:27:15,620 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:27:19,376 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 [] [2023-02-15 19:27:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:21,533 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2023-02-15 19:27:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 19:27:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-02-15 19:27:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:21,551 INFO L225 Difference]: With dead ends: 7819 [2023-02-15 19:27:21,552 INFO L226 Difference]: Without dead ends: 7813 [2023-02-15 19:27:21,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-15 19:27:21,555 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2829 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 998 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2892 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:21,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2892 Valid, 2985 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2276 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2023-02-15 19:27:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2023-02-15 19:27:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2023-02-15 19:27:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-15 19:27:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2023-02-15 19:27:21,877 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2023-02-15 19:27:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:21,877 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2023-02-15 19:27:21,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:27:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2023-02-15 19:27:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 19:27:21,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:21,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:21,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 19:27:21,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1807638448, now seen corresponding path program 1 times [2023-02-15 19:27:21,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:21,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128554473] [2023-02-15 19:27:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:22,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:22,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:27:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:22,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 19:27:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:22,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:22,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128554473] [2023-02-15 19:27:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128554473] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:22,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:22,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:27:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330415807] [2023-02-15 19:27:22,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:27:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:27:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:27:22,181 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:27:27,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:29,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:31,630 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2023-02-15 19:27:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 19:27:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-02-15 19:27:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:31,647 INFO L225 Difference]: With dead ends: 7815 [2023-02-15 19:27:31,647 INFO L226 Difference]: Without dead ends: 7809 [2023-02-15 19:27:31,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-15 19:27:31,650 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2414 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 754 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:31,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2476 Valid, 3330 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 2808 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2023-02-15 19:27:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2023-02-15 19:27:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2023-02-15 19:27:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-15 19:27:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2023-02-15 19:27:31,986 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 50 [2023-02-15 19:27:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:31,986 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2023-02-15 19:27:31,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:27:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2023-02-15 19:27:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 19:27:31,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:31,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:31,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 19:27:31,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2023-02-15 19:27:31,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:31,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141750454] [2023-02-15 19:27:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:31,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:32,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 19:27:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 19:27:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:32,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141750454] [2023-02-15 19:27:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141750454] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:32,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:32,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:27:32,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742008021] [2023-02-15 19:27:32,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:32,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:27:32,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:32,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:27:32,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:27:32,266 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:27:36,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:38,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:39,384 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2023-02-15 19:27:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:27:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-02-15 19:27:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:39,403 INFO L225 Difference]: With dead ends: 7824 [2023-02-15 19:27:39,403 INFO L226 Difference]: Without dead ends: 7807 [2023-02-15 19:27:39,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:27:39,408 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 717 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 242 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:39,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 3381 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2272 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-02-15 19:27:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2023-02-15 19:27:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2023-02-15 19:27:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2023-02-15 19:27:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2023-02-15 19:27:39,749 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2023-02-15 19:27:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:39,749 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2023-02-15 19:27:39,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:27:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2023-02-15 19:27:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 19:27:39,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:39,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:39,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 19:27:39,751 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:39,751 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2023-02-15 19:27:39,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:39,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357624060] [2023-02-15 19:27:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:39,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:39,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:39,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:27:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:40,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 19:27:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:40,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357624060] [2023-02-15 19:27:40,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357624060] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:40,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:40,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:27:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515276309] [2023-02-15 19:27:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:40,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:27:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:27:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:27:40,063 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:27:44,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:46,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:27:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:47,768 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2023-02-15 19:27:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:27:47,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-02-15 19:27:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:47,789 INFO L225 Difference]: With dead ends: 7822 [2023-02-15 19:27:47,790 INFO L226 Difference]: Without dead ends: 7800 [2023-02-15 19:27:47,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:27:47,795 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 715 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 238 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:47,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 3381 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2266 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2023-02-15 19:27:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2023-02-15 19:27:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2023-02-15 19:27:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2023-02-15 19:27:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2023-02-15 19:27:48,162 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2023-02-15 19:27:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:48,163 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2023-02-15 19:27:48,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:27:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2023-02-15 19:27:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:27:48,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:48,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:48,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 19:27:48,165 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2023-02-15 19:27:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:48,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028921785] [2023-02-15 19:27:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:48,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:48,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:48,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:48,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:27:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:48,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:48,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028921785] [2023-02-15 19:27:48,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028921785] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:48,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:48,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:27:48,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747275923] [2023-02-15 19:27:48,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:48,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:27:48,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:27:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:27:48,395 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:27:52,327 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 [] [2023-02-15 19:27:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:53,257 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2023-02-15 19:27:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:27:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-15 19:27:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:53,279 INFO L225 Difference]: With dead ends: 13804 [2023-02-15 19:27:53,279 INFO L226 Difference]: Without dead ends: 8064 [2023-02-15 19:27:53,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:27:53,303 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 434 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:53,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1981 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1010 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 19:27:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2023-02-15 19:27:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2023-02-15 19:27:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2023-02-15 19:27:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2023-02-15 19:27:53,684 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2023-02-15 19:27:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:53,685 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2023-02-15 19:27:53,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:27:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2023-02-15 19:27:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 19:27:53,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:53,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:53,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 19:27:53,687 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2023-02-15 19:27:53,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:53,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494827657] [2023-02-15 19:27:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:53,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:53,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:53,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:53,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 19:27:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:53,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494827657] [2023-02-15 19:27:53,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494827657] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:53,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:53,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:27:53,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26252061] [2023-02-15 19:27:53,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:53,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:27:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:27:53,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:27:53,884 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:27:57,857 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 [] [2023-02-15 19:27:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:27:58,904 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2023-02-15 19:27:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 19:27:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-02-15 19:27:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:27:58,931 INFO L225 Difference]: With dead ends: 8020 [2023-02-15 19:27:58,931 INFO L226 Difference]: Without dead ends: 8002 [2023-02-15 19:27:58,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:27:58,938 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 907 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 335 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 2676 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:27:58,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 2676 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1532 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 19:27:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2023-02-15 19:27:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2023-02-15 19:27:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2023-02-15 19:27:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2023-02-15 19:27:59,384 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2023-02-15 19:27:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:27:59,384 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2023-02-15 19:27:59,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:27:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2023-02-15 19:27:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:27:59,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:27:59,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:27:59,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 19:27:59,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:27:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:27:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2023-02-15 19:27:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:27:59,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982440616] [2023-02-15 19:27:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:27:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:27:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:59,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:27:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:59,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:27:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:27:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:27:59,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:27:59,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982440616] [2023-02-15 19:27:59,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982440616] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:27:59,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:27:59,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:27:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135946672] [2023-02-15 19:27:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:27:59,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:27:59,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:27:59,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:27:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:27:59,694 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:28:03,238 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 [] [2023-02-15 19:28:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:04,068 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2023-02-15 19:28:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 19:28:04,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2023-02-15 19:28:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:04,085 INFO L225 Difference]: With dead ends: 11721 [2023-02-15 19:28:04,086 INFO L226 Difference]: Without dead ends: 7953 [2023-02-15 19:28:04,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:28:04,101 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1226 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 311 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:04,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1759 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1005 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-15 19:28:04,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2023-02-15 19:28:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2023-02-15 19:28:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2023-02-15 19:28:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2023-02-15 19:28:04,508 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2023-02-15 19:28:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:04,508 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2023-02-15 19:28:04,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:28:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2023-02-15 19:28:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 19:28:04,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:04,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:04,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 19:28:04,510 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2023-02-15 19:28:04,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:04,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121930779] [2023-02-15 19:28:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:04,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:04,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:04,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:28:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:04,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 19:28:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:04,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:04,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121930779] [2023-02-15 19:28:04,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121930779] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:04,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:04,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:28:04,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433589134] [2023-02-15 19:28:04,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:04,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:28:04,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:28:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:28:04,801 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:28:08,661 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 [] [2023-02-15 19:28:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:09,678 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2023-02-15 19:28:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:28:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2023-02-15 19:28:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:09,696 INFO L225 Difference]: With dead ends: 8024 [2023-02-15 19:28:09,697 INFO L226 Difference]: Without dead ends: 8008 [2023-02-15 19:28:09,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:28:09,700 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 978 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 430 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:09,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 3182 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1867 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 19:28:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2023-02-15 19:28:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2023-02-15 19:28:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2023-02-15 19:28:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2023-02-15 19:28:10,112 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2023-02-15 19:28:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:10,112 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2023-02-15 19:28:10,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:28:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2023-02-15 19:28:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 19:28:10,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:10,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 19:28:10,116 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2023-02-15 19:28:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:10,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389591784] [2023-02-15 19:28:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:10,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:10,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:10,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389591784] [2023-02-15 19:28:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389591784] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:10,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:28:10,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167666591] [2023-02-15 19:28:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:10,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:28:10,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:28:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:28:10,257 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:28:13,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:28:15,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:28:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:17,676 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2023-02-15 19:28:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:28:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-15 19:28:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:17,703 INFO L225 Difference]: With dead ends: 10992 [2023-02-15 19:28:17,704 INFO L226 Difference]: Without dead ends: 10979 [2023-02-15 19:28:17,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:28:17,710 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 998 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 276 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:17,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 2831 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1357 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-02-15 19:28:17,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2023-02-15 19:28:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2023-02-15 19:28:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2023-02-15 19:28:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2023-02-15 19:28:18,266 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2023-02-15 19:28:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:18,266 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2023-02-15 19:28:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:28:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2023-02-15 19:28:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 19:28:18,268 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:18,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 19:28:18,269 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2023-02-15 19:28:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228731943] [2023-02-15 19:28:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:18,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:18,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228731943] [2023-02-15 19:28:18,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228731943] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:18,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:18,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:28:18,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835107006] [2023-02-15 19:28:18,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:18,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:28:18,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:28:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:28:18,589 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:28:22,534 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 [] [2023-02-15 19:28:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:23,462 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2023-02-15 19:28:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 19:28:23,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-02-15 19:28:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:23,487 INFO L225 Difference]: With dead ends: 13163 [2023-02-15 19:28:23,487 INFO L226 Difference]: Without dead ends: 8839 [2023-02-15 19:28:23,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:28:23,517 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1208 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 296 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:23,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1759 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 19:28:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2023-02-15 19:28:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2023-02-15 19:28:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2023-02-15 19:28:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2023-02-15 19:28:23,986 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2023-02-15 19:28:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:23,986 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2023-02-15 19:28:23,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:28:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2023-02-15 19:28:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 19:28:23,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:23,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:23,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 19:28:23,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2023-02-15 19:28:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:23,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820534559] [2023-02-15 19:28:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:24,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:24,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:28:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:24,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820534559] [2023-02-15 19:28:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820534559] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:24,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:28:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24023387] [2023-02-15 19:28:24,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:28:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:28:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:28:24,181 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:28:27,994 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 [] [2023-02-15 19:28:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:28,943 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2023-02-15 19:28:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 19:28:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-15 19:28:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:28,960 INFO L225 Difference]: With dead ends: 7691 [2023-02-15 19:28:28,960 INFO L226 Difference]: Without dead ends: 7673 [2023-02-15 19:28:28,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:28:28,964 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 900 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 332 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:28,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 2682 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1531 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 19:28:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2023-02-15 19:28:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2023-02-15 19:28:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2023-02-15 19:28:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2023-02-15 19:28:29,388 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2023-02-15 19:28:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:29,389 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2023-02-15 19:28:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:28:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2023-02-15 19:28:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 19:28:29,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:29,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:29,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 19:28:29,391 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2023-02-15 19:28:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:29,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301762138] [2023-02-15 19:28:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:29,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:29,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301762138] [2023-02-15 19:28:29,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301762138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:29,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:29,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:28:29,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87756125] [2023-02-15 19:28:29,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:29,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:28:29,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:29,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:28:29,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:28:29,610 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:28:33,194 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 [] [2023-02-15 19:28:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:35,624 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2023-02-15 19:28:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:28:35,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-02-15 19:28:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:35,646 INFO L225 Difference]: With dead ends: 9126 [2023-02-15 19:28:35,646 INFO L226 Difference]: Without dead ends: 9122 [2023-02-15 19:28:35,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:28:35,651 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 1708 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 487 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:35,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 2616 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1436 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-02-15 19:28:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2023-02-15 19:28:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2023-02-15 19:28:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2023-02-15 19:28:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2023-02-15 19:28:36,201 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2023-02-15 19:28:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:36,201 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2023-02-15 19:28:36,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 19:28:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2023-02-15 19:28:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 19:28:36,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:36,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:36,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 19:28:36,203 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2023-02-15 19:28:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:36,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265085244] [2023-02-15 19:28:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:36,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:36,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265085244] [2023-02-15 19:28:36,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265085244] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:36,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:36,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 19:28:36,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655701509] [2023-02-15 19:28:36,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:36,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 19:28:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 19:28:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:28:36,438 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:28:40,156 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 [] [2023-02-15 19:28:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:41,163 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2023-02-15 19:28:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 19:28:41,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-15 19:28:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:41,201 INFO L225 Difference]: With dead ends: 7650 [2023-02-15 19:28:41,201 INFO L226 Difference]: Without dead ends: 7607 [2023-02-15 19:28:41,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:28:41,206 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 423 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 179 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:41,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 3564 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1539 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-15 19:28:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2023-02-15 19:28:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2023-02-15 19:28:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2023-02-15 19:28:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2023-02-15 19:28:41,721 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2023-02-15 19:28:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:41,721 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2023-02-15 19:28:41,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 19:28:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2023-02-15 19:28:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 19:28:41,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:41,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:41,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 19:28:41,723 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:41,723 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2023-02-15 19:28:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:41,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74416061] [2023-02-15 19:28:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:41,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:28:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:42,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 19:28:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:42,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74416061] [2023-02-15 19:28:42,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74416061] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:42,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:42,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:28:42,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194957723] [2023-02-15 19:28:42,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:28:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:28:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:28:42,077 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:28:46,297 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 [] [2023-02-15 19:28:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:47,535 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2023-02-15 19:28:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 19:28:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2023-02-15 19:28:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:47,552 INFO L225 Difference]: With dead ends: 13421 [2023-02-15 19:28:47,553 INFO L226 Difference]: Without dead ends: 7857 [2023-02-15 19:28:47,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:28:47,569 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 401 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 208 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:47,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2978 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1791 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 19:28:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2023-02-15 19:28:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2023-02-15 19:28:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5807 states have (on average 1.4756328568968486) internal successors, (8569), 6017 states have internal predecessors, (8569), 749 states have call successors, (749), 230 states have call predecessors, (749), 296 states have return successors, (1233), 636 states have call predecessors, (1233), 736 states have call successors, (1233) [2023-02-15 19:28:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2023-02-15 19:28:48,026 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2023-02-15 19:28:48,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:48,028 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2023-02-15 19:28:48,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:28:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2023-02-15 19:28:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 19:28:48,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:48,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:48,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 19:28:48,054 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2023-02-15 19:28:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:48,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979453907] [2023-02-15 19:28:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:48,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:48,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:48,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:48,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:28:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:48,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 19:28:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:48,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979453907] [2023-02-15 19:28:48,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979453907] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:48,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-15 19:28:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533184830] [2023-02-15 19:28:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:48,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 19:28:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 19:28:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:28:48,777 INFO L87 Difference]: Start difference. First operand 6853 states and 10551 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:28:54,519 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 [] [2023-02-15 19:28:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:28:55,833 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2023-02-15 19:28:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 19:28:55,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-02-15 19:28:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:28:55,853 INFO L225 Difference]: With dead ends: 7755 [2023-02-15 19:28:55,853 INFO L226 Difference]: Without dead ends: 7741 [2023-02-15 19:28:55,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-02-15 19:28:55,859 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 952 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 4024 SdHoareTripleChecker+Invalid, 3431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:28:55,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 4024 Invalid, 3431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3004 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2023-02-15 19:28:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2023-02-15 19:28:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2023-02-15 19:28:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 5808 states have (on average 1.475550964187328) internal successors, (8570), 6019 states have internal predecessors, (8570), 749 states have call successors, (749), 230 states have call predecessors, (749), 297 states have return successors, (1248), 636 states have call predecessors, (1248), 736 states have call successors, (1248) [2023-02-15 19:28:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2023-02-15 19:28:56,345 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2023-02-15 19:28:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:28:56,345 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2023-02-15 19:28:56,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:28:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2023-02-15 19:28:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 19:28:56,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:28:56,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:28:56,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 19:28:56,348 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:28:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:28:56,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2023-02-15 19:28:56,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:28:56,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952491573] [2023-02-15 19:28:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:28:56,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:28:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:56,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:28:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:56,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:28:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:56,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 19:28:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:28:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:56,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 19:28:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:28:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:28:56,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:28:56,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952491573] [2023-02-15 19:28:56,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952491573] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:28:56,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:28:56,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:28:56,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037141272] [2023-02-15 19:28:56,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:28:56,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:28:56,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:28:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:28:56,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:28:56,630 INFO L87 Difference]: Start difference. First operand 6855 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 19:29:00,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:29:02,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:29:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:05,508 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2023-02-15 19:29:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 19:29:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2023-02-15 19:29:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:05,528 INFO L225 Difference]: With dead ends: 10875 [2023-02-15 19:29:05,528 INFO L226 Difference]: Without dead ends: 7624 [2023-02-15 19:29:05,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:29:05,540 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 965 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 347 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:05,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 2829 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1901 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2023-02-15 19:29:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2023-02-15 19:29:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2023-02-15 19:29:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5693 states have (on average 1.476725803618479) internal successors, (8407), 5908 states have internal predecessors, (8407), 738 states have call successors, (738), 227 states have call predecessors, (738), 291 states have return successors, (1189), 617 states have call predecessors, (1189), 717 states have call successors, (1189) [2023-02-15 19:29:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2023-02-15 19:29:06,051 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2023-02-15 19:29:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:06,052 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2023-02-15 19:29:06,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 19:29:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2023-02-15 19:29:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 19:29:06,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:06,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:06,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 19:29:06,073 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:06,073 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2023-02-15 19:29:06,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:06,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19179173] [2023-02-15 19:29:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:06,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:06,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:29:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:06,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:06,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 19:29:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:06,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19179173] [2023-02-15 19:29:06,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19179173] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:06,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:06,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:29:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077267337] [2023-02-15 19:29:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:06,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:29:06,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:29:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:29:06,311 INFO L87 Difference]: Start difference. First operand 6723 states and 10334 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 19:29:10,164 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 [] [2023-02-15 19:29:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:11,197 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2023-02-15 19:29:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:29:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2023-02-15 19:29:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:11,217 INFO L225 Difference]: With dead ends: 13105 [2023-02-15 19:29:11,217 INFO L226 Difference]: Without dead ends: 7568 [2023-02-15 19:29:11,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:29:11,233 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 466 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 265 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:11,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1730 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 19:29:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2023-02-15 19:29:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2023-02-15 19:29:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 5601 states have (on average 1.4767005891805034) internal successors, (8271), 5826 states have internal predecessors, (8271), 744 states have call successors, (744), 227 states have call predecessors, (744), 283 states have return successors, (1184), 605 states have call predecessors, (1184), 723 states have call successors, (1184) [2023-02-15 19:29:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2023-02-15 19:29:11,756 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2023-02-15 19:29:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:11,756 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2023-02-15 19:29:11,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 19:29:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2023-02-15 19:29:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 19:29:11,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:11,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:11,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 19:29:11,758 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2023-02-15 19:29:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:11,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291898460] [2023-02-15 19:29:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:11,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:12,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 19:29:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:12,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:12,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291898460] [2023-02-15 19:29:12,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291898460] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:12,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:12,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 19:29:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668455293] [2023-02-15 19:29:12,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 19:29:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 19:29:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:29:12,039 INFO L87 Difference]: Start difference. First operand 6629 states and 10199 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:29:16,634 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 [] [2023-02-15 19:29:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:18,049 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2023-02-15 19:29:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 19:29:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2023-02-15 19:29:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:18,064 INFO L225 Difference]: With dead ends: 7477 [2023-02-15 19:29:18,064 INFO L226 Difference]: Without dead ends: 7459 [2023-02-15 19:29:18,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-02-15 19:29:18,069 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 902 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 331 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:18,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 3651 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2630 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-02-15 19:29:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2023-02-15 19:29:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2023-02-15 19:29:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5598 states have (on average 1.476777420507324) internal successors, (8267), 5823 states have internal predecessors, (8267), 743 states have call successors, (743), 227 states have call predecessors, (743), 283 states have return successors, (1183), 604 states have call predecessors, (1183), 722 states have call successors, (1183) [2023-02-15 19:29:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2023-02-15 19:29:18,607 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2023-02-15 19:29:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:18,608 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2023-02-15 19:29:18,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:29:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2023-02-15 19:29:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 19:29:18,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:18,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:18,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 19:29:18,610 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:18,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2023-02-15 19:29:18,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:18,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468610344] [2023-02-15 19:29:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:18,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:18,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:29:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:18,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:29:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:18,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:18,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468610344] [2023-02-15 19:29:18,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468610344] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:18,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:18,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:29:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366167624] [2023-02-15 19:29:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:29:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:29:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:29:18,807 INFO L87 Difference]: Start difference. First operand 6625 states and 10193 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:29:22,831 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 [] [2023-02-15 19:29:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:24,110 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2023-02-15 19:29:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:29:24,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2023-02-15 19:29:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:24,129 INFO L225 Difference]: With dead ends: 10441 [2023-02-15 19:29:24,130 INFO L226 Difference]: Without dead ends: 7793 [2023-02-15 19:29:24,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:29:24,139 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 954 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 358 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:24,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1842 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1288 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 19:29:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2023-02-15 19:29:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2023-02-15 19:29:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 5810 states have (on average 1.4731497418244406) internal successors, (8559), 6043 states have internal predecessors, (8559), 743 states have call successors, (743), 227 states have call predecessors, (743), 293 states have return successors, (1198), 606 states have call predecessors, (1198), 722 states have call successors, (1198) [2023-02-15 19:29:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2023-02-15 19:29:24,647 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2023-02-15 19:29:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:24,647 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2023-02-15 19:29:24,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:29:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2023-02-15 19:29:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 19:29:24,650 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:24,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:24,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 19:29:24,650 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2023-02-15 19:29:24,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:24,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511586555] [2023-02-15 19:29:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:24,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:24,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:29:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:24,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-15 19:29:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:24,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 19:29:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:24,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511586555] [2023-02-15 19:29:24,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511586555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:24,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:24,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:29:24,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660860555] [2023-02-15 19:29:24,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:24,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:29:24,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:29:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:29:24,930 INFO L87 Difference]: Start difference. First operand 6847 states and 10500 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 19:29:28,511 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 [] [2023-02-15 19:29:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:31,228 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2023-02-15 19:29:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 19:29:31,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-02-15 19:29:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:31,254 INFO L225 Difference]: With dead ends: 9490 [2023-02-15 19:29:31,255 INFO L226 Difference]: Without dead ends: 5437 [2023-02-15 19:29:31,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-02-15 19:29:31,266 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 2908 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 796 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2968 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:31,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2968 Valid, 2703 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 2165 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-02-15 19:29:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2023-02-15 19:29:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2023-02-15 19:29:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 3785 states have (on average 1.4544253632760897) internal successors, (5505), 3908 states have internal predecessors, (5505), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2023-02-15 19:29:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2023-02-15 19:29:31,677 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2023-02-15 19:29:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:31,677 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2023-02-15 19:29:31,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 19:29:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2023-02-15 19:29:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 19:29:31,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:31,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:31,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 19:29:31,683 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:31,683 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2023-02-15 19:29:31,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:31,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280760290] [2023-02-15 19:29:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:31,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:31,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:29:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:31,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 19:29:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:31,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:31,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280760290] [2023-02-15 19:29:31,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280760290] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:31,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:31,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:29:31,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861327941] [2023-02-15 19:29:31,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:31,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:29:31,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:31,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:29:31,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:29:31,913 INFO L87 Difference]: Start difference. First operand 4456 states and 6623 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:29:36,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:29:38,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:29:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:40,026 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2023-02-15 19:29:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:29:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-15 19:29:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:40,038 INFO L225 Difference]: With dead ends: 7882 [2023-02-15 19:29:40,038 INFO L226 Difference]: Without dead ends: 5395 [2023-02-15 19:29:40,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:29:40,044 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 837 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 140 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:40,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 2133 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1694 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2023-02-15 19:29:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2023-02-15 19:29:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2023-02-15 19:29:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3761 states have (on average 1.4557298590800318) internal successors, (5475), 3884 states have internal predecessors, (5475), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2023-02-15 19:29:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2023-02-15 19:29:40,432 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2023-02-15 19:29:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:40,433 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2023-02-15 19:29:40,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:29:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2023-02-15 19:29:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 19:29:40,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:40,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-15 19:29:40,435 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2023-02-15 19:29:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078627150] [2023-02-15 19:29:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:40,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:40,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:40,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:29:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:40,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-15 19:29:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:40,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-15 19:29:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:40,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-15 19:29:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:40,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:40,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078627150] [2023-02-15 19:29:40,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078627150] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:40,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:40,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:29:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794320935] [2023-02-15 19:29:40,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:29:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:29:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:29:40,641 INFO L87 Difference]: Start difference. First operand 4432 states and 6593 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 19:29:44,879 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 [] [2023-02-15 19:29:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:45,977 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2023-02-15 19:29:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 19:29:45,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2023-02-15 19:29:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:45,989 INFO L225 Difference]: With dead ends: 7928 [2023-02-15 19:29:45,989 INFO L226 Difference]: Without dead ends: 5377 [2023-02-15 19:29:45,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-15 19:29:45,995 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1469 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 539 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:45,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 2092 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1394 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-02-15 19:29:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2023-02-15 19:29:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2023-02-15 19:29:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3755 states have (on average 1.4561917443408787) internal successors, (5468), 3877 states have internal predecessors, (5468), 464 states have call successors, (464), 161 states have call predecessors, (464), 203 states have return successors, (638), 399 states have call predecessors, (638), 447 states have call successors, (638) [2023-02-15 19:29:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2023-02-15 19:29:46,343 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2023-02-15 19:29:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:46,344 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2023-02-15 19:29:46,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 19:29:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2023-02-15 19:29:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 19:29:46,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:46,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 19:29:46,346 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:46,346 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2023-02-15 19:29:46,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:46,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070364720] [2023-02-15 19:29:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:46,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:46,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:46,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:46,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 19:29:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:46,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 19:29:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:46,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:46,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070364720] [2023-02-15 19:29:46,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070364720] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:46,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:46,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:29:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431717571] [2023-02-15 19:29:46,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:29:46,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:29:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:29:46,621 INFO L87 Difference]: Start difference. First operand 4423 states and 6570 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:29:51,474 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 [] [2023-02-15 19:29:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:29:52,657 INFO L93 Difference]: Finished difference Result 5300 states and 8024 transitions. [2023-02-15 19:29:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:29:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-15 19:29:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:29:52,667 INFO L225 Difference]: With dead ends: 5300 [2023-02-15 19:29:52,667 INFO L226 Difference]: Without dead ends: 5280 [2023-02-15 19:29:52,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:29:52,669 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 993 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 419 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:29:52,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 2870 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1818 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2023-02-15 19:29:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2023-02-15 19:29:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4422. [2023-02-15 19:29:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 3755 states have (on average 1.455925432756325) internal successors, (5467), 3876 states have internal predecessors, (5467), 463 states have call successors, (463), 161 states have call predecessors, (463), 203 states have return successors, (637), 399 states have call predecessors, (637), 446 states have call successors, (637) [2023-02-15 19:29:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6567 transitions. [2023-02-15 19:29:53,027 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6567 transitions. Word has length 68 [2023-02-15 19:29:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:29:53,028 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 6567 transitions. [2023-02-15 19:29:53,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:29:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6567 transitions. [2023-02-15 19:29:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 19:29:53,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:29:53,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:29:53,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 19:29:53,030 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:29:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:29:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2023-02-15 19:29:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:29:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909366233] [2023-02-15 19:29:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:29:53,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:29:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:53,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:29:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:29:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:29:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:53,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 19:29:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:29:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:29:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:29:53,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909366233] [2023-02-15 19:29:53,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909366233] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:29:53,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:29:53,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 19:29:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230401561] [2023-02-15 19:29:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:29:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 19:29:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:29:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 19:29:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:29:53,472 INFO L87 Difference]: Start difference. First operand 4422 states and 6567 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:29:59,071 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 [] [2023-02-15 19:30:00,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:30:00,240 INFO L93 Difference]: Finished difference Result 5362 states and 8158 transitions. [2023-02-15 19:30:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 19:30:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2023-02-15 19:30:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:30:00,252 INFO L225 Difference]: With dead ends: 5362 [2023-02-15 19:30:00,252 INFO L226 Difference]: Without dead ends: 5346 [2023-02-15 19:30:00,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-15 19:30:00,257 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 998 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 427 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:30:00,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 3289 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 2228 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2023-02-15 19:30:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2023-02-15 19:30:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4427. [2023-02-15 19:30:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 3758 states have (on average 1.456093666844066) internal successors, (5472), 3880 states have internal predecessors, (5472), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-15 19:30:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6576 transitions. [2023-02-15 19:30:00,664 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6576 transitions. Word has length 69 [2023-02-15 19:30:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:30:00,665 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6576 transitions. [2023-02-15 19:30:00,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:30:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6576 transitions. [2023-02-15 19:30:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 19:30:00,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:30:00,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:30:00,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 19:30:00,667 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:30:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:30:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2023-02-15 19:30:00,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:30:00,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567918606] [2023-02-15 19:30:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:30:00,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:30:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:00,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:30:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:00,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:30:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:00,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:30:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 19:30:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:30:01,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:30:01,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567918606] [2023-02-15 19:30:01,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567918606] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:30:01,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:30:01,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 19:30:01,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874993707] [2023-02-15 19:30:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:30:01,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 19:30:01,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:30:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 19:30:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:30:01,013 INFO L87 Difference]: Start difference. First operand 4427 states and 6576 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:30:05,033 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 [] [2023-02-15 19:30:07,043 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 [] [2023-02-15 19:30:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:30:08,183 INFO L93 Difference]: Finished difference Result 9525 states and 14480 transitions. [2023-02-15 19:30:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:30:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-02-15 19:30:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:30:08,195 INFO L225 Difference]: With dead ends: 9525 [2023-02-15 19:30:08,195 INFO L226 Difference]: Without dead ends: 5473 [2023-02-15 19:30:08,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:30:08,201 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 405 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 94 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-02-15 19:30:08,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2523 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1453 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2023-02-15 19:30:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2023-02-15 19:30:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4455. [2023-02-15 19:30:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 3786 states have (on average 1.4527205493924986) internal successors, (5500), 3908 states have internal predecessors, (5500), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-15 19:30:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 6604 transitions. [2023-02-15 19:30:08,613 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 6604 transitions. Word has length 69 [2023-02-15 19:30:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:30:08,613 INFO L495 AbstractCegarLoop]: Abstraction has 4455 states and 6604 transitions. [2023-02-15 19:30:08,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:30:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 6604 transitions. [2023-02-15 19:30:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 19:30:08,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:30:08,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:30:08,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 19:30:08,615 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:30:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:30:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2023-02-15 19:30:08,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:30:08,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249610487] [2023-02-15 19:30:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:30:08,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:30:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:08,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:30:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:08,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:30:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:08,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:30:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 19:30:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:30:09,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:30:09,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249610487] [2023-02-15 19:30:09,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249610487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:30:09,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:30:09,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 19:30:09,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461100068] [2023-02-15 19:30:09,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:30:09,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 19:30:09,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:30:09,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 19:30:09,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:30:09,002 INFO L87 Difference]: Start difference. First operand 4455 states and 6604 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:30:12,831 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 [] [2023-02-15 19:30:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:30:13,917 INFO L93 Difference]: Finished difference Result 9445 states and 14286 transitions. [2023-02-15 19:30:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:30:13,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-02-15 19:30:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:30:13,927 INFO L225 Difference]: With dead ends: 9445 [2023-02-15 19:30:13,928 INFO L226 Difference]: Without dead ends: 5384 [2023-02-15 19:30:13,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:30:13,935 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 570 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 366 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:30:13,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 3151 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1678 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-02-15 19:30:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2023-02-15 19:30:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4434. [2023-02-15 19:30:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 3772 states have (on average 1.4544008483563096) internal successors, (5486), 3894 states have internal predecessors, (5486), 465 states have call successors, (465), 161 states have call predecessors, (465), 196 states have return successors, (594), 393 states have call predecessors, (594), 448 states have call successors, (594) [2023-02-15 19:30:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6545 transitions. [2023-02-15 19:30:14,311 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6545 transitions. Word has length 69 [2023-02-15 19:30:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:30:14,311 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6545 transitions. [2023-02-15 19:30:14,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:30:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6545 transitions. [2023-02-15 19:30:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 19:30:14,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:30:14,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:30:14,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-15 19:30:14,313 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:30:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:30:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2023-02-15 19:30:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:30:14,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792371094] [2023-02-15 19:30:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:30:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:30:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:14,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:30:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:14,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:30:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:14,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:30:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:14,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 19:30:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:30:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:30:14,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:30:14,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792371094] [2023-02-15 19:30:14,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792371094] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:30:14,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:30:14,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 19:30:14,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120922264] [2023-02-15 19:30:14,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:30:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 19:30:14,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:30:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 19:30:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:30:14,772 INFO L87 Difference]: Start difference. First operand 4434 states and 6545 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 19:30:20,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:30:22,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 19:30:24,049 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 [] [2023-02-15 19:30:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:30:25,808 INFO L93 Difference]: Finished difference Result 7973 states and 11989 transitions. [2023-02-15 19:30:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 19:30:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-02-15 19:30:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:30:25,819 INFO L225 Difference]: With dead ends: 7973 [2023-02-15 19:30:25,819 INFO L226 Difference]: Without dead ends: 5482 [2023-02-15 19:30:25,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-02-15 19:30:25,826 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 812 mSDsluCounter, 3273 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 158 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 3799 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:30:25,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 3799 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3068 Invalid, 3 Unknown, 0 Unchecked, 10.3s Time] [2023-02-15 19:30:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2023-02-15 19:30:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 4492. [2023-02-15 19:30:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 3830 states have (on average 1.4527415143603133) internal successors, (5564), 3952 states have internal predecessors, (5564), 465 states have call successors, (465), 161 states have call predecessors, (465), 196 states have return successors, (594), 393 states have call predecessors, (594), 448 states have call successors, (594) [2023-02-15 19:30:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 6623 transitions. [2023-02-15 19:30:26,240 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 6623 transitions. Word has length 71 [2023-02-15 19:30:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:30:26,240 INFO L495 AbstractCegarLoop]: Abstraction has 4492 states and 6623 transitions. [2023-02-15 19:30:26,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 19:30:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 6623 transitions. [2023-02-15 19:30:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 19:30:26,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:30:26,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:30:26,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-15 19:30:26,242 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:30:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:30:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2023-02-15 19:30:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:30:26,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043706262] [2023-02-15 19:30:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:30:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:30:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:26,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:30:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:26,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:30:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:26,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 19:30:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:26,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:30:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:30:26,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:30:26,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043706262] [2023-02-15 19:30:26,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043706262] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:30:26,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:30:26,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:30:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567538452] [2023-02-15 19:30:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:30:26,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:30:26,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:30:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:30:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:30:26,609 INFO L87 Difference]: Start difference. First operand 4492 states and 6623 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:30:30,321 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 [] [2023-02-15 19:30:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:30:31,447 INFO L93 Difference]: Finished difference Result 9696 states and 14684 transitions. [2023-02-15 19:30:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 19:30:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2023-02-15 19:30:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:30:31,457 INFO L225 Difference]: With dead ends: 9696 [2023-02-15 19:30:31,458 INFO L226 Difference]: Without dead ends: 5598 [2023-02-15 19:30:31,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:30:31,464 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 425 mSDsluCounter, 2188 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 201 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2741 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:30:31,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 2741 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1544 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 19:30:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5598 states. [2023-02-15 19:30:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5598 to 4532. [2023-02-15 19:30:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4532 states, 3856 states have (on average 1.4496887966804979) internal successors, (5590), 3980 states have internal predecessors, (5590), 465 states have call successors, (465), 161 states have call predecessors, (465), 210 states have return successors, (639), 405 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-15 19:30:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 6694 transitions. [2023-02-15 19:30:31,853 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 6694 transitions. Word has length 70 [2023-02-15 19:30:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:30:31,853 INFO L495 AbstractCegarLoop]: Abstraction has 4532 states and 6694 transitions. [2023-02-15 19:30:31,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:30:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 6694 transitions. [2023-02-15 19:30:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 19:30:31,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:30:31,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:30:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-15 19:30:31,856 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:30:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:30:31,856 INFO L85 PathProgramCache]: Analyzing trace with hash 965591191, now seen corresponding path program 1 times [2023-02-15 19:30:31,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:30:31,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284817768] [2023-02-15 19:30:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:30:31,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:30:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:32,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:30:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:32,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:30:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:32,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 19:30:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:30:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:30:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:30:32,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284817768] [2023-02-15 19:30:32,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284817768] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:30:32,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:30:32,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 19:30:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051514004] [2023-02-15 19:30:32,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:30:32,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 19:30:32,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:30:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 19:30:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:30:32,173 INFO L87 Difference]: Start difference. First operand 4532 states and 6694 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)