./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 f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-f4b24e3 [2022-07-13 11:32:55,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:32:55,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:32:55,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:32:55,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:32:55,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:32:55,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:32:55,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:32:55,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:32:55,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:32:55,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:32:55,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:32:55,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:32:55,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:32:55,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:32:55,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:32:55,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:32:55,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:32:55,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:32:55,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:32:55,703 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:32:55,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:32:55,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:32:55,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:32:55,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:32:55,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:32:55,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:32:55,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:32:55,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:32:55,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:32:55,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:32:55,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:32:55,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:32:55,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:32:55,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:32:55,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:32:55,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:32:55,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:32:55,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:32:55,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:32:55,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:32:55,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:32:55,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:32:55,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:32:55,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:32:55,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:32:55,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:32:55,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:32:55,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:32:55,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:32:55,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:32:55,729 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:32:55,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:32:55,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:32:55,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:32:55,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:32:55,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:32:55,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:32:55,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:32:55,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:32:55,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:32:55,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:32:55,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:32:55,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:32:55,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:32:55,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:32:55,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:32:55,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:32:55,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:32:55,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:32:55,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:32:55,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:32:55,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:32:55,732 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:32:55,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:32:55,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:32:55,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-07-13 11:32:55,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:32:55,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:32:55,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:32:55,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:32:55,919 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:32:55,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-13 11:32:55,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ae370b5/392e8b1f7e9042d9948bb8fef4674b9e/FLAG9e004692a [2022-07-13 11:32:56,470 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:32:56,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-13 11:32:56,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ae370b5/392e8b1f7e9042d9948bb8fef4674b9e/FLAG9e004692a [2022-07-13 11:32:56,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ae370b5/392e8b1f7e9042d9948bb8fef4674b9e [2022-07-13 11:32:57,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:32:57,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:32:57,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:32:57,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:32:57,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:32:57,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:32:57" (1/1) ... [2022-07-13 11:32:57,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d1d908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:57, skipping insertion in model container [2022-07-13 11:32:57,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:32:57" (1/1) ... [2022-07-13 11:32:57,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:32:57,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:32:57,592 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-13 11:32:57,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:32:57,883 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:32:57,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-13 11:32:58,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:32:58,176 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:32:58,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58 WrapperNode [2022-07-13 11:32:58,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:32:58,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:32:58,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:32:58,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:32:58,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,334 INFO L137 Inliner]: procedures = 128, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3086 [2022-07-13 11:32:58,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:32:58,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:32:58,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:32:58,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:32:58,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:32:58,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:32:58,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:32:58,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:32:58,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (1/1) ... [2022-07-13 11:32:58,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:32:58,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:32:58,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 11:32:58,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 11:32:58,696 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-07-13 11:32:58,697 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-07-13 11:32:58,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-13 11:32:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-13 11:32:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-13 11:32:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:32:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-13 11:32:58,698 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-13 11:32:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-13 11:32:58,698 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-13 11:32:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-13 11:32:58,698 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-13 11:32:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:32:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-07-13 11:32:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-07-13 11:32:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-13 11:32:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-13 11:32:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-07-13 11:32:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-07-13 11:32:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-13 11:32:58,700 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-13 11:32:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-13 11:32:58,700 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-13 11:32:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-13 11:32:58,700 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-13 11:32:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-07-13 11:32:58,700 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-07-13 11:32:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:32:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:32:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-07-13 11:32:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-07-13 11:32:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-07-13 11:32:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-07-13 11:32:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 11:32:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 11:32:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-13 11:32:58,702 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-13 11:32:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 11:32:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-07-13 11:32:58,702 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-07-13 11:32:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 11:32:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-13 11:32:58,702 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-13 11:32:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-07-13 11:32:58,703 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-07-13 11:32:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:32:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-07-13 11:32:58,703 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-07-13 11:32:58,703 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-07-13 11:32:58,703 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-07-13 11:32:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-13 11:32:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-13 11:32:58,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-13 11:32:58,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:32:58,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:32:59,107 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:32:59,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:32:59,153 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,163 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-13 11:32:59,163 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-13 11:32:59,204 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,330 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-13 11:32:59,331 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-13 11:32:59,345 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,354 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-13 11:32:59,354 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-13 11:32:59,452 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,476 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-13 11:32:59,476 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-13 11:32:59,477 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,478 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,479 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,571 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-13 11:32:59,571 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-13 11:32:59,571 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-13 11:32:59,571 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-13 11:32:59,572 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-13 11:32:59,572 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-13 11:32:59,573 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,577 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:32:59,578 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,068 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-07-13 11:33:00,069 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-07-13 11:33:00,069 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-13 11:33:00,069 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-13 11:33:00,069 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-07-13 11:33:00,069 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-07-13 11:33:00,093 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,117 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-13 11:33:00,118 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-13 11:33:00,123 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,124 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,125 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,126 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,127 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,129 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,130 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:00,131 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:03,170 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-07-13 11:33:03,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-07-13 11:33:03,172 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-07-13 11:33:03,172 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-07-13 11:33:03,172 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-07-13 11:33:03,181 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:33:03,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:33:03,189 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 11:33:03,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:33:03 BoogieIcfgContainer [2022-07-13 11:33:03,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:33:03,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:33:03,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:33:03,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:33:03,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:32:57" (1/3) ... [2022-07-13 11:33:03,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4726bdee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:33:03, skipping insertion in model container [2022-07-13 11:33:03,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:32:58" (2/3) ... [2022-07-13 11:33:03,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4726bdee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:33:03, skipping insertion in model container [2022-07-13 11:33:03,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:33:03" (3/3) ... [2022-07-13 11:33:03,197 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-07-13 11:33:03,206 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:33:03,206 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:33:03,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:33:03,249 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4e244dcf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3289e355 [2022-07-13 11:33:03,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:33:03,254 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) [2022-07-13 11:33:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:33:03,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:03,260 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] [2022-07-13 11:33:03,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2022-07-13 11:33:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:03,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088945218] [2022-07-13 11:33:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:03,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:03,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:03,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:03,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088945218] [2022-07-13 11:33:03,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088945218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:03,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:03,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:33:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145503219] [2022-07-13 11:33:03,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:03,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:33:03,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:33:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:03,794 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) [2022-07-13 11:33:07,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:07,522 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2022-07-13 11:33:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:33:07,524 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 [2022-07-13 11:33:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:07,534 INFO L225 Difference]: With dead ends: 1174 [2022-07-13 11:33:07,535 INFO L226 Difference]: Without dead ends: 657 [2022-07-13 11:33:07,540 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 [2022-07-13 11:33:07,542 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 400 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 238 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:07,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2156 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 785 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-13 11:33:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-07-13 11:33:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-07-13 11:33:07,596 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) [2022-07-13 11:33:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2022-07-13 11:33:07,600 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2022-07-13 11:33:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:07,600 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2022-07-13 11:33:07,600 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) [2022-07-13 11:33:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2022-07-13 11:33:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 11:33:07,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:07,602 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] [2022-07-13 11:33:07,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:33:07,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2022-07-13 11:33:07,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:07,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501334344] [2022-07-13 11:33:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:07,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:07,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:07,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:07,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501334344] [2022-07-13 11:33:07,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501334344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:07,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:07,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:33:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576374945] [2022-07-13 11:33:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:07,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:33:07,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:33:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:33:07,844 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) [2022-07-13 11:33:11,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:11,905 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2022-07-13 11:33:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:33:11,906 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 [2022-07-13 11:33:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:11,910 INFO L225 Difference]: With dead ends: 1217 [2022-07-13 11:33:11,911 INFO L226 Difference]: Without dead ends: 657 [2022-07-13 11:33:11,913 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 [2022-07-13 11:33:11,915 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 366 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:11,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 2765 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 986 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-07-13 11:33:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-07-13 11:33:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-07-13 11:33:11,946 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) [2022-07-13 11:33:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2022-07-13 11:33:11,951 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2022-07-13 11:33:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:11,952 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2022-07-13 11:33:11,952 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) [2022-07-13 11:33:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2022-07-13 11:33:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 11:33:11,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:11,953 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] [2022-07-13 11:33:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:33:11,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2022-07-13 11:33:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:11,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944055470] [2022-07-13 11:33:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:11,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:12,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944055470] [2022-07-13 11:33:12,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944055470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:12,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:12,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:33:12,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231772887] [2022-07-13 11:33:12,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:12,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:33:12,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:33:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:12,164 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) [2022-07-13 11:33:15,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:16,257 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2022-07-13 11:33:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:33:16,258 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 [2022-07-13 11:33:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:16,264 INFO L225 Difference]: With dead ends: 1542 [2022-07-13 11:33:16,264 INFO L226 Difference]: Without dead ends: 1127 [2022-07-13 11:33:16,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:33:16,266 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 1330 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:16,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 2428 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1032 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-07-13 11:33:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-07-13 11:33:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2022-07-13 11:33:16,300 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) [2022-07-13 11:33:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2022-07-13 11:33:16,306 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2022-07-13 11:33:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:16,307 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2022-07-13 11:33:16,308 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) [2022-07-13 11:33:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2022-07-13 11:33:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 11:33:16,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:16,315 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] [2022-07-13 11:33:16,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:33:16,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2022-07-13 11:33:16,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:16,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097284231] [2022-07-13 11:33:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:16,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:16,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:16,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:16,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:33:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:16,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097284231] [2022-07-13 11:33:16,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097284231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:16,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:16,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:33:16,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504195079] [2022-07-13 11:33:16,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:16,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:33:16,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:16,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:33:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:16,599 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) [2022-07-13 11:33:19,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:20,654 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2022-07-13 11:33:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:33:20,654 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 [2022-07-13 11:33:20,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:20,662 INFO L225 Difference]: With dead ends: 1879 [2022-07-13 11:33:20,662 INFO L226 Difference]: Without dead ends: 1860 [2022-07-13 11:33:20,663 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 [2022-07-13 11:33:20,663 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 1460 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:20,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1530 Valid, 2050 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 823 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-07-13 11:33:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-07-13 11:33:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2022-07-13 11:33:20,706 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) [2022-07-13 11:33:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2022-07-13 11:33:20,713 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2022-07-13 11:33:20,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:20,714 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2022-07-13 11:33:20,714 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) [2022-07-13 11:33:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2022-07-13 11:33:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 11:33:20,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:20,716 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] [2022-07-13 11:33:20,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:33:20,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:20,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2022-07-13 11:33:20,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:20,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856464780] [2022-07-13 11:33:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:20,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:20,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:20,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:20,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:20,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856464780] [2022-07-13 11:33:20,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856464780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:20,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:20,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:33:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532335462] [2022-07-13 11:33:20,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:20,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:33:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:33:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:20,965 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) [2022-07-13 11:33:24,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:24,389 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2022-07-13 11:33:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:33:24,390 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 [2022-07-13 11:33:24,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:24,398 INFO L225 Difference]: With dead ends: 1856 [2022-07-13 11:33:24,398 INFO L226 Difference]: Without dead ends: 1852 [2022-07-13 11:33:24,399 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 [2022-07-13 11:33:24,400 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 467 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 246 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:24,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 2039 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-07-13 11:33:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-07-13 11:33:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2022-07-13 11:33:24,441 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) [2022-07-13 11:33:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2022-07-13 11:33:24,448 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2022-07-13 11:33:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:24,448 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2022-07-13 11:33:24,449 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) [2022-07-13 11:33:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2022-07-13 11:33:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 11:33:24,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:24,451 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] [2022-07-13 11:33:24,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:33:24,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2022-07-13 11:33:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530481507] [2022-07-13 11:33:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:24,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:24,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530481507] [2022-07-13 11:33:24,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530481507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:24,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:24,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:33:24,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253657007] [2022-07-13 11:33:24,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:24,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:33:24,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:33:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:24,605 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) [2022-07-13 11:33:27,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:29,199 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2022-07-13 11:33:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:33:29,199 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 [2022-07-13 11:33:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:29,212 INFO L225 Difference]: With dead ends: 3293 [2022-07-13 11:33:29,213 INFO L226 Difference]: Without dead ends: 3290 [2022-07-13 11:33:29,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:33:29,215 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 925 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 310 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:29,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 2956 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1186 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-07-13 11:33:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2022-07-13 11:33:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2022-07-13 11:33:29,279 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) [2022-07-13 11:33:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2022-07-13 11:33:29,288 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2022-07-13 11:33:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:29,289 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2022-07-13 11:33:29,289 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) [2022-07-13 11:33:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2022-07-13 11:33:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:33:29,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:29,290 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] [2022-07-13 11:33:29,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:33:29,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2022-07-13 11:33:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:29,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338006892] [2022-07-13 11:33:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:29,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:29,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:33:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:33:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338006892] [2022-07-13 11:33:29,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338006892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:29,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:29,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:33:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942100871] [2022-07-13 11:33:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:33:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:33:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:33:29,505 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) [2022-07-13 11:33:33,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:35,341 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2022-07-13 11:33:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 11:33:35,342 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 [2022-07-13 11:33:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:35,361 INFO L225 Difference]: With dead ends: 3942 [2022-07-13 11:33:35,361 INFO L226 Difference]: Without dead ends: 3937 [2022-07-13 11:33:35,365 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 [2022-07-13 11:33:35,365 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 1251 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 602 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:35,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 2907 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1635 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-07-13 11:33:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-07-13 11:33:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2022-07-13 11:33:35,544 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) [2022-07-13 11:33:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2022-07-13 11:33:35,557 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2022-07-13 11:33:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:35,557 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2022-07-13 11:33:35,557 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) [2022-07-13 11:33:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2022-07-13 11:33:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 11:33:35,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:35,559 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] [2022-07-13 11:33:35,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:33:35,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2022-07-13 11:33:35,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690588626] [2022-07-13 11:33:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:35,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:35,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:35,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:35,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690588626] [2022-07-13 11:33:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690588626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:35,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:33:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700100255] [2022-07-13 11:33:35,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:35,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:33:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:33:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:33:35,775 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) [2022-07-13 11:33:39,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:41,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:42,607 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2022-07-13 11:33:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:33:42,608 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 [2022-07-13 11:33:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:42,621 INFO L225 Difference]: With dead ends: 7046 [2022-07-13 11:33:42,621 INFO L226 Difference]: Without dead ends: 4021 [2022-07-13 11:33:42,629 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 [2022-07-13 11:33:42,630 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 2317 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 770 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2365 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:42,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2365 Valid, 2279 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 1165 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-07-13 11:33:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2022-07-13 11:33:42,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2022-07-13 11:33:42,715 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) [2022-07-13 11:33:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2022-07-13 11:33:42,726 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2022-07-13 11:33:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:42,726 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2022-07-13 11:33:42,727 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) [2022-07-13 11:33:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2022-07-13 11:33:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 11:33:42,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:42,728 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] [2022-07-13 11:33:42,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:33:42,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2022-07-13 11:33:42,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:42,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149632193] [2022-07-13 11:33:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:42,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:42,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:42,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:33:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:42,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:42,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149632193] [2022-07-13 11:33:42,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149632193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:42,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:42,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:33:42,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475132703] [2022-07-13 11:33:42,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:42,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:33:42,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:42,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:33:42,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:33:42,866 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) [2022-07-13 11:33:46,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:47,484 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2022-07-13 11:33:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:33:47,485 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 [2022-07-13 11:33:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:47,513 INFO L225 Difference]: With dead ends: 10834 [2022-07-13 11:33:47,514 INFO L226 Difference]: Without dead ends: 7785 [2022-07-13 11:33:47,529 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 [2022-07-13 11:33:47,530 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 2093 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 707 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2722 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:47,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2169 Valid, 2722 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1228 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:33:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2022-07-13 11:33:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2022-07-13 11:33:47,781 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) [2022-07-13 11:33:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2022-07-13 11:33:47,805 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2022-07-13 11:33:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:47,806 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2022-07-13 11:33:47,807 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) [2022-07-13 11:33:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2022-07-13 11:33:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:33:47,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:47,808 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] [2022-07-13 11:33:47,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:33:47,809 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2022-07-13 11:33:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836770910] [2022-07-13 11:33:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:47,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:47,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:33:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:47,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:33:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:48,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836770910] [2022-07-13 11:33:48,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836770910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:48,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:48,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:33:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754216286] [2022-07-13 11:33:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:33:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:33:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:33:48,009 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) [2022-07-13 11:33:51,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:53,986 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2022-07-13 11:33:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 11:33:53,986 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 [2022-07-13 11:33:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:54,007 INFO L225 Difference]: With dead ends: 7819 [2022-07-13 11:33:54,007 INFO L226 Difference]: Without dead ends: 7813 [2022-07-13 11:33:54,010 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 [2022-07-13 11:33:54,010 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2724 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 1105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2785 SdHoareTripleChecker+Valid, 3201 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:54,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2785 Valid, 3201 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 2060 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-07-13 11:33:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2022-07-13 11:33:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2022-07-13 11:33:54,249 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) [2022-07-13 11:33:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2022-07-13 11:33:54,275 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2022-07-13 11:33:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:54,275 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2022-07-13 11:33:54,275 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) [2022-07-13 11:33:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2022-07-13 11:33:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 11:33:54,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:54,277 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] [2022-07-13 11:33:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:33:54,278 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:54,278 INFO L85 PathProgramCache]: Analyzing trace with hash 677869713, now seen corresponding path program 1 times [2022-07-13 11:33:54,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:54,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537222073] [2022-07-13 11:33:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:54,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:33:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:54,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:33:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:54,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:33:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:33:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:54,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537222073] [2022-07-13 11:33:54,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537222073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:54,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:54,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:33:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080199382] [2022-07-13 11:33:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:33:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:33:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:33:54,563 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-07-13 11:33:58,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:00,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:03,560 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2022-07-13 11:34:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 11:34:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 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 49 [2022-07-13 11:34:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:03,583 INFO L225 Difference]: With dead ends: 7815 [2022-07-13 11:34:03,583 INFO L226 Difference]: Without dead ends: 7809 [2022-07-13 11:34:03,587 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 [2022-07-13 11:34:03,588 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2322 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 849 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:03,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2383 Valid, 3546 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 2592 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-07-13 11:34:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2022-07-13 11:34:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2022-07-13 11:34:03,823 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) [2022-07-13 11:34:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2022-07-13 11:34:03,905 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 49 [2022-07-13 11:34:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:03,905 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2022-07-13 11:34:03,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-07-13 11:34:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2022-07-13 11:34:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:34:03,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:03,906 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] [2022-07-13 11:34:03,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:34:03,907 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2022-07-13 11:34:03,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:03,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808143947] [2022-07-13 11:34:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:04,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:04,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:04,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:34:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:04,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:34:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:04,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:04,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808143947] [2022-07-13 11:34:04,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808143947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:04,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:04,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:34:04,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513736591] [2022-07-13 11:34:04,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:04,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:34:04,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:34:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:34:04,109 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) [2022-07-13 11:34:08,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:10,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:11,247 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2022-07-13 11:34:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:34:11,248 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 [2022-07-13 11:34:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:11,314 INFO L225 Difference]: With dead ends: 7824 [2022-07-13 11:34:11,314 INFO L226 Difference]: Without dead ends: 7807 [2022-07-13 11:34:11,321 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 [2022-07-13 11:34:11,336 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 683 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 278 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:11,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 3518 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2135 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-07-13 11:34:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2022-07-13 11:34:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2022-07-13 11:34:11,613 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) [2022-07-13 11:34:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2022-07-13 11:34:11,634 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2022-07-13 11:34:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:11,634 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2022-07-13 11:34:11,635 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) [2022-07-13 11:34:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2022-07-13 11:34:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 11:34:11,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:11,636 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] [2022-07-13 11:34:11,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:34:11,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2022-07-13 11:34:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413563553] [2022-07-13 11:34:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:11,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:11,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:11,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:34:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:11,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:34:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:11,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413563553] [2022-07-13 11:34:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413563553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:11,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:11,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:34:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303025059] [2022-07-13 11:34:11,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:11,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:34:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:11,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:34:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:34:11,839 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) [2022-07-13 11:34:16,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:18,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:19,274 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2022-07-13 11:34:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:34:19,275 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 [2022-07-13 11:34:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:19,328 INFO L225 Difference]: With dead ends: 7822 [2022-07-13 11:34:19,343 INFO L226 Difference]: Without dead ends: 7800 [2022-07-13 11:34:19,348 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 [2022-07-13 11:34:19,349 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 682 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 273 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:19,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 3518 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2129 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-07-13 11:34:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-07-13 11:34:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2022-07-13 11:34:19,637 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) [2022-07-13 11:34:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2022-07-13 11:34:19,663 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2022-07-13 11:34:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:19,663 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2022-07-13 11:34:19,663 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) [2022-07-13 11:34:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2022-07-13 11:34:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 11:34:19,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:19,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:19,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:34:19,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2022-07-13 11:34:19,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:19,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903327969] [2022-07-13 11:34:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:19,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:19,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:34:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903327969] [2022-07-13 11:34:19,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903327969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:19,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:19,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:34:19,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251377655] [2022-07-13 11:34:19,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:19,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:34:19,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:34:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:34:19,880 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) [2022-07-13 11:34:23,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:24,167 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2022-07-13 11:34:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:34:24,168 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 [2022-07-13 11:34:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:24,192 INFO L225 Difference]: With dead ends: 13804 [2022-07-13 11:34:24,192 INFO L226 Difference]: Without dead ends: 8064 [2022-07-13 11:34:24,216 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 [2022-07-13 11:34:24,218 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 411 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 236 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:24,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2070 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 921 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-07-13 11:34:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2022-07-13 11:34:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2022-07-13 11:34:24,468 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) [2022-07-13 11:34:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2022-07-13 11:34:24,495 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2022-07-13 11:34:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:24,496 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2022-07-13 11:34:24,496 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) [2022-07-13 11:34:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2022-07-13 11:34:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:34:24,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:24,498 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] [2022-07-13 11:34:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:34:24,498 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2022-07-13 11:34:24,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:24,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525862403] [2022-07-13 11:34:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:24,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:24,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:24,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 11:34:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:24,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:24,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525862403] [2022-07-13 11:34:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525862403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:24,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:24,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:34:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513629670] [2022-07-13 11:34:24,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:24,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:34:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:34:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:34:24,707 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) [2022-07-13 11:34:28,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:29,421 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2022-07-13 11:34:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:34:29,422 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 [2022-07-13 11:34:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:29,439 INFO L225 Difference]: With dead ends: 8020 [2022-07-13 11:34:29,439 INFO L226 Difference]: Without dead ends: 8002 [2022-07-13 11:34:29,442 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 [2022-07-13 11:34:29,442 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 868 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 374 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:29,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 2803 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1405 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2022-07-13 11:34:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2022-07-13 11:34:29,676 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) [2022-07-13 11:34:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2022-07-13 11:34:29,702 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2022-07-13 11:34:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:29,702 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2022-07-13 11:34:29,703 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) [2022-07-13 11:34:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2022-07-13 11:34:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 11:34:29,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:29,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:34:29,706 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2022-07-13 11:34:29,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:29,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285654083] [2022-07-13 11:34:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:29,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:29,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285654083] [2022-07-13 11:34:29,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285654083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:29,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:29,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:34:29,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959813438] [2022-07-13 11:34:29,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:29,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:34:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:34:29,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:34:29,862 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) [2022-07-13 11:34:33,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:34,216 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2022-07-13 11:34:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:34:34,217 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 [2022-07-13 11:34:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:34,237 INFO L225 Difference]: With dead ends: 11721 [2022-07-13 11:34:34,237 INFO L226 Difference]: Without dead ends: 7953 [2022-07-13 11:34:34,254 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 [2022-07-13 11:34:34,254 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1185 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 352 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:34,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1858 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-07-13 11:34:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2022-07-13 11:34:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2022-07-13 11:34:34,542 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) [2022-07-13 11:34:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2022-07-13 11:34:34,565 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2022-07-13 11:34:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:34,566 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2022-07-13 11:34:34,566 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) [2022-07-13 11:34:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2022-07-13 11:34:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 11:34:34,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:34,569 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] [2022-07-13 11:34:34,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 11:34:34,570 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2022-07-13 11:34:34,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:34,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695462012] [2022-07-13 11:34:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:34,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:34,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:34,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:34:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:34,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:34:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:34,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695462012] [2022-07-13 11:34:34,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695462012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:34,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:34,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:34:34,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957181478] [2022-07-13 11:34:34,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:34,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:34:34,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:34:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:34:34,772 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) [2022-07-13 11:34:38,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:39,720 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2022-07-13 11:34:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:34:39,721 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 [2022-07-13 11:34:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:39,743 INFO L225 Difference]: With dead ends: 8024 [2022-07-13 11:34:39,743 INFO L226 Difference]: Without dead ends: 8008 [2022-07-13 11:34:39,747 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 [2022-07-13 11:34:39,747 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 932 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:39,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 3306 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1743 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-07-13 11:34:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-07-13 11:34:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2022-07-13 11:34:40,082 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) [2022-07-13 11:34:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2022-07-13 11:34:40,106 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2022-07-13 11:34:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:40,107 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2022-07-13 11:34:40,107 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) [2022-07-13 11:34:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2022-07-13 11:34:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:34:40,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:40,108 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] [2022-07-13 11:34:40,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:34:40,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2022-07-13 11:34:40,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:40,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807080636] [2022-07-13 11:34:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:40,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:40,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:40,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807080636] [2022-07-13 11:34:40,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807080636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:40,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:40,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:34:40,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731967308] [2022-07-13 11:34:40,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:40,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:34:40,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:34:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:40,234 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) [2022-07-13 11:34:43,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:45,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:47,385 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2022-07-13 11:34:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:34:47,386 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 [2022-07-13 11:34:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:47,428 INFO L225 Difference]: With dead ends: 10992 [2022-07-13 11:34:47,428 INFO L226 Difference]: Without dead ends: 10979 [2022-07-13 11:34:47,434 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 [2022-07-13 11:34:47,434 INFO L413 NwaCegarLoop]: 1203 mSDtfsCounter, 966 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 308 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:47,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 3004 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1184 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-07-13 11:34:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-07-13 11:34:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2022-07-13 11:34:47,807 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) [2022-07-13 11:34:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2022-07-13 11:34:47,835 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2022-07-13 11:34:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:47,835 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2022-07-13 11:34:47,835 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) [2022-07-13 11:34:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2022-07-13 11:34:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:34:47,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:47,837 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] [2022-07-13 11:34:47,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 11:34:47,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2022-07-13 11:34:47,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:47,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477387044] [2022-07-13 11:34:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:47,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:47,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:47,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:47,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:47,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477387044] [2022-07-13 11:34:47,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477387044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:47,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:47,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:34:47,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893610247] [2022-07-13 11:34:47,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:47,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:34:47,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:47,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:34:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:34:47,994 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) [2022-07-13 11:34:51,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:52,288 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2022-07-13 11:34:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:34:52,289 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 [2022-07-13 11:34:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:52,313 INFO L225 Difference]: With dead ends: 13163 [2022-07-13 11:34:52,313 INFO L226 Difference]: Without dead ends: 8839 [2022-07-13 11:34:52,329 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 [2022-07-13 11:34:52,331 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 1171 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 333 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:52,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1866 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 853 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-07-13 11:34:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2022-07-13 11:34:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2022-07-13 11:34:52,732 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) [2022-07-13 11:34:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2022-07-13 11:34:52,754 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2022-07-13 11:34:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:52,755 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2022-07-13 11:34:52,756 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) [2022-07-13 11:34:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2022-07-13 11:34:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 11:34:52,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:52,759 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] [2022-07-13 11:34:52,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 11:34:52,759 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2022-07-13 11:34:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478365532] [2022-07-13 11:34:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:52,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:52,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:52,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:52,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:34:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478365532] [2022-07-13 11:34:52,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478365532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:52,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:52,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:34:52,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089620608] [2022-07-13 11:34:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:34:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:34:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:34:52,915 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) [2022-07-13 11:34:56,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:57,358 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2022-07-13 11:34:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:34:57,358 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 [2022-07-13 11:34:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:57,374 INFO L225 Difference]: With dead ends: 7691 [2022-07-13 11:34:57,374 INFO L226 Difference]: Without dead ends: 7673 [2022-07-13 11:34:57,377 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 [2022-07-13 11:34:57,378 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 861 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 371 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:57,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 2812 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1401 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-07-13 11:34:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2022-07-13 11:34:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2022-07-13 11:34:57,661 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) [2022-07-13 11:34:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2022-07-13 11:34:57,682 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2022-07-13 11:34:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:57,683 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2022-07-13 11:34:57,683 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) [2022-07-13 11:34:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2022-07-13 11:34:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 11:34:57,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:57,684 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] [2022-07-13 11:34:57,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 11:34:57,685 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2022-07-13 11:34:57,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:57,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192724093] [2022-07-13 11:34:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:57,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:57,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:34:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:57,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:34:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:34:57,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192724093] [2022-07-13 11:34:57,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192724093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:57,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:57,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:34:57,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544510409] [2022-07-13 11:34:57,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:34:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:34:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:34:57,872 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) [2022-07-13 11:35:01,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:03,256 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2022-07-13 11:35:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:35:03,256 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 [2022-07-13 11:35:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:03,277 INFO L225 Difference]: With dead ends: 9126 [2022-07-13 11:35:03,277 INFO L226 Difference]: Without dead ends: 9122 [2022-07-13 11:35:03,282 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 [2022-07-13 11:35:03,283 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 1660 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 535 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:03,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 2790 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-13 11:35:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2022-07-13 11:35:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2022-07-13 11:35:03,718 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) [2022-07-13 11:35:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2022-07-13 11:35:03,738 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2022-07-13 11:35:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:03,738 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2022-07-13 11:35:03,739 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) [2022-07-13 11:35:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2022-07-13 11:35:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 11:35:03,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:03,742 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] [2022-07-13 11:35:03,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 11:35:03,743 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:03,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:03,743 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2022-07-13 11:35:03,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:03,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136835073] [2022-07-13 11:35:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:03,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:03,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:03,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:03,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136835073] [2022-07-13 11:35:03,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136835073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:03,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:03,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:35:03,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920153481] [2022-07-13 11:35:03,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:35:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:35:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:35:03,894 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) [2022-07-13 11:35:07,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:08,729 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2022-07-13 11:35:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:35:08,730 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 [2022-07-13 11:35:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:08,747 INFO L225 Difference]: With dead ends: 7650 [2022-07-13 11:35:08,747 INFO L226 Difference]: Without dead ends: 7607 [2022-07-13 11:35:08,750 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 [2022-07-13 11:35:08,751 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 410 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:08,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 3663 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1440 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-07-13 11:35:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-07-13 11:35:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2022-07-13 11:35:09,165 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) [2022-07-13 11:35:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2022-07-13 11:35:09,184 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2022-07-13 11:35:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:09,184 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2022-07-13 11:35:09,184 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) [2022-07-13 11:35:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2022-07-13 11:35:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:35:09,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:09,186 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] [2022-07-13 11:35:09,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 11:35:09,186 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:09,186 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2022-07-13 11:35:09,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:09,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087833966] [2022-07-13 11:35:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:09,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:09,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:09,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:09,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:35:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:09,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 11:35:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:09,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087833966] [2022-07-13 11:35:09,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087833966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:09,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:09,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:35:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108894006] [2022-07-13 11:35:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:09,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:35:09,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:35:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:35:09,434 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) [2022-07-13 11:35:13,357 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:14,594 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2022-07-13 11:35:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:35:14,595 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 [2022-07-13 11:35:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:14,612 INFO L225 Difference]: With dead ends: 13421 [2022-07-13 11:35:14,612 INFO L226 Difference]: Without dead ends: 7857 [2022-07-13 11:35:14,626 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 [2022-07-13 11:35:14,627 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 381 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 229 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:14,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 3070 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1699 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-07-13 11:35:14,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2022-07-13 11:35:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2022-07-13 11:35:14,929 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) [2022-07-13 11:35:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2022-07-13 11:35:14,947 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2022-07-13 11:35:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:14,947 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2022-07-13 11:35:14,947 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) [2022-07-13 11:35:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2022-07-13 11:35:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:35:14,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:14,949 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] [2022-07-13 11:35:14,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 11:35:14,949 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2022-07-13 11:35:14,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:14,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045792958] [2022-07-13 11:35:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:14,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:15,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:15,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:15,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:35:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:15,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 11:35:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:15,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045792958] [2022-07-13 11:35:15,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045792958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:15,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:15,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:35:15,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356600720] [2022-07-13 11:35:15,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:15,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:35:15,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:35:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:35:15,186 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) [2022-07-13 11:35:19,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:20,877 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2022-07-13 11:35:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:35:20,877 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 [2022-07-13 11:35:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:20,894 INFO L225 Difference]: With dead ends: 7755 [2022-07-13 11:35:20,895 INFO L226 Difference]: Without dead ends: 7741 [2022-07-13 11:35:20,898 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 [2022-07-13 11:35:20,899 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 908 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 473 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 4150 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:20,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 4150 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2878 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-07-13 11:35:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2022-07-13 11:35:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2022-07-13 11:35:21,310 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) [2022-07-13 11:35:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2022-07-13 11:35:21,330 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2022-07-13 11:35:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:21,330 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2022-07-13 11:35:21,330 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) [2022-07-13 11:35:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2022-07-13 11:35:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 11:35:21,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:21,332 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] [2022-07-13 11:35:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 11:35:21,332 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:21,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2022-07-13 11:35:21,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:21,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606926983] [2022-07-13 11:35:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:21,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:21,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:21,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:21,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:35:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:21,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:35:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:21,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:21,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 11:35:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:21,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:21,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606926983] [2022-07-13 11:35:21,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606926983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:21,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:21,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:35:21,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295650928] [2022-07-13 11:35:21,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:21,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:35:21,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:35:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:35:21,542 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) [2022-07-13 11:35:25,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:27,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:29,157 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2022-07-13 11:35:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 11:35:29,157 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 [2022-07-13 11:35:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:29,209 INFO L225 Difference]: With dead ends: 10875 [2022-07-13 11:35:29,210 INFO L226 Difference]: Without dead ends: 7624 [2022-07-13 11:35:29,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:35:29,223 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 914 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 401 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:29,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 3000 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1730 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-07-13 11:35:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2022-07-13 11:35:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2022-07-13 11:35:29,534 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) [2022-07-13 11:35:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2022-07-13 11:35:29,554 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2022-07-13 11:35:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:29,554 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2022-07-13 11:35:29,554 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) [2022-07-13 11:35:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2022-07-13 11:35:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 11:35:29,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:29,556 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] [2022-07-13 11:35:29,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 11:35:29,556 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2022-07-13 11:35:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:29,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095562201] [2022-07-13 11:35:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:29,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:29,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:29,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:35:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:29,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:35:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:29,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:29,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095562201] [2022-07-13 11:35:29,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095562201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:29,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:29,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:35:29,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674799711] [2022-07-13 11:35:29,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:29,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:35:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:35:29,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:35:29,762 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) [2022-07-13 11:35:33,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:34,273 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2022-07-13 11:35:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:35:34,274 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 [2022-07-13 11:35:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:34,293 INFO L225 Difference]: With dead ends: 13105 [2022-07-13 11:35:34,293 INFO L226 Difference]: Without dead ends: 7568 [2022-07-13 11:35:34,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:35:34,309 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 439 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 294 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:34,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1822 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 814 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-07-13 11:35:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2022-07-13 11:35:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2022-07-13 11:35:34,741 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) [2022-07-13 11:35:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2022-07-13 11:35:34,771 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2022-07-13 11:35:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:34,771 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2022-07-13 11:35:34,772 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) [2022-07-13 11:35:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2022-07-13 11:35:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 11:35:34,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:34,786 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] [2022-07-13 11:35:34,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 11:35:34,786 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2022-07-13 11:35:34,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:34,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189078966] [2022-07-13 11:35:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:34,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:34,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:34,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:34,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 11:35:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:34,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189078966] [2022-07-13 11:35:34,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189078966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:34,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:34,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:35:34,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667696774] [2022-07-13 11:35:34,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:34,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:35:34,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:35:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:35:34,970 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) [2022-07-13 11:35:40,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:41,864 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2022-07-13 11:35:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 11:35:41,865 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 [2022-07-13 11:35:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:41,885 INFO L225 Difference]: With dead ends: 7477 [2022-07-13 11:35:41,885 INFO L226 Difference]: Without dead ends: 7459 [2022-07-13 11:35:41,891 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 [2022-07-13 11:35:41,892 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 861 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 372 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:41,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 3778 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2503 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-07-13 11:35:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2022-07-13 11:35:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2022-07-13 11:35:42,330 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) [2022-07-13 11:35:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2022-07-13 11:35:42,357 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2022-07-13 11:35:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:42,357 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2022-07-13 11:35:42,357 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) [2022-07-13 11:35:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2022-07-13 11:35:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 11:35:42,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:42,359 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] [2022-07-13 11:35:42,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 11:35:42,360 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2022-07-13 11:35:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:42,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382373961] [2022-07-13 11:35:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:42,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:42,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:35:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:35:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:42,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:42,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382373961] [2022-07-13 11:35:42,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382373961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:42,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:42,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:35:42,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558768036] [2022-07-13 11:35:42,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:42,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:35:42,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:42,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:35:42,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:35:42,572 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) [2022-07-13 11:35:48,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:49,608 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2022-07-13 11:35:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:35:49,609 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 [2022-07-13 11:35:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:49,628 INFO L225 Difference]: With dead ends: 10441 [2022-07-13 11:35:49,628 INFO L226 Difference]: Without dead ends: 7793 [2022-07-13 11:35:49,639 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 [2022-07-13 11:35:49,640 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 909 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:49,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 1969 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1161 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-07-13 11:35:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-07-13 11:35:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2022-07-13 11:35:49,990 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) [2022-07-13 11:35:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2022-07-13 11:35:50,011 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2022-07-13 11:35:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:50,011 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2022-07-13 11:35:50,011 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) [2022-07-13 11:35:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2022-07-13 11:35:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 11:35:50,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:50,013 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] [2022-07-13 11:35:50,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 11:35:50,013 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2022-07-13 11:35:50,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:50,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452646253] [2022-07-13 11:35:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:50,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:50,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:35:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:50,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 11:35:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:50,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-13 11:35:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:50,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:50,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452646253] [2022-07-13 11:35:50,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452646253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:50,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:50,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:35:50,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611702409] [2022-07-13 11:35:50,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:50,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:35:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:50,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:35:50,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:35:50,263 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) [2022-07-13 11:35:53,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:56,172 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2022-07-13 11:35:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 11:35:56,173 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 [2022-07-13 11:35:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:56,186 INFO L225 Difference]: With dead ends: 9490 [2022-07-13 11:35:56,186 INFO L226 Difference]: Without dead ends: 5437 [2022-07-13 11:35:56,197 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 [2022-07-13 11:35:56,201 INFO L413 NwaCegarLoop]: 990 mSDtfsCounter, 2801 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2861 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:56,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2861 Valid, 2936 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1932 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-07-13 11:35:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2022-07-13 11:35:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2022-07-13 11:35:56,514 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) [2022-07-13 11:35:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2022-07-13 11:35:56,523 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2022-07-13 11:35:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:56,524 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2022-07-13 11:35:56,524 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) [2022-07-13 11:35:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2022-07-13 11:35:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 11:35:56,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:56,525 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] [2022-07-13 11:35:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 11:35:56,526 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2022-07-13 11:35:56,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:56,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136759037] [2022-07-13 11:35:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:56,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:35:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:56,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:35:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:56,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:35:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:56,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 11:35:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:35:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:56,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136759037] [2022-07-13 11:35:56,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136759037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:56,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:56,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:35:56,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547363520] [2022-07-13 11:35:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:56,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:35:56,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:35:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:35:56,679 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) [2022-07-13 11:36:00,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:02,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:03,414 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2022-07-13 11:36:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:36:03,415 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 [2022-07-13 11:36:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:03,426 INFO L225 Difference]: With dead ends: 7882 [2022-07-13 11:36:03,426 INFO L226 Difference]: Without dead ends: 5395 [2022-07-13 11:36:03,432 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 [2022-07-13 11:36:03,433 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 793 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:03,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 2260 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1567 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-07-13 11:36:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-07-13 11:36:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2022-07-13 11:36:03,785 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) [2022-07-13 11:36:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2022-07-13 11:36:03,795 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2022-07-13 11:36:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:03,795 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2022-07-13 11:36:03,795 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) [2022-07-13 11:36:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2022-07-13 11:36:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 11:36:03,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:03,797 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] [2022-07-13 11:36:03,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 11:36:03,797 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2022-07-13 11:36:03,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:03,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956310905] [2022-07-13 11:36:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:03,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:03,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:03,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 11:36:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:03,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 11:36:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:03,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 11:36:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:03,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 11:36:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:03,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:03,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956310905] [2022-07-13 11:36:03,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956310905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:03,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:03,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:36:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278739787] [2022-07-13 11:36:03,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:36:03,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:36:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:36:03,970 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) [2022-07-13 11:36:08,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:09,114 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2022-07-13 11:36:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 11:36:09,115 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 [2022-07-13 11:36:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:09,131 INFO L225 Difference]: With dead ends: 7928 [2022-07-13 11:36:09,131 INFO L226 Difference]: Without dead ends: 5377 [2022-07-13 11:36:09,138 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 [2022-07-13 11:36:09,139 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 1397 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 611 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:09,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2224 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-07-13 11:36:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2022-07-13 11:36:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2022-07-13 11:36:09,526 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) [2022-07-13 11:36:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2022-07-13 11:36:09,537 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2022-07-13 11:36:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:09,538 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2022-07-13 11:36:09,538 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) [2022-07-13 11:36:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2022-07-13 11:36:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 11:36:09,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:09,539 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] [2022-07-13 11:36:09,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 11:36:09,540 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:09,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2022-07-13 11:36:09,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:09,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754912821] [2022-07-13 11:36:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:09,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:09,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:09,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 11:36:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:09,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 11:36:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:09,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754912821] [2022-07-13 11:36:09,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754912821] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:09,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:09,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:36:09,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543861481] [2022-07-13 11:36:09,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:36:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:36:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:36:09,795 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) [2022-07-13 11:36:13,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:15,025 INFO L93 Difference]: Finished difference Result 5300 states and 8024 transitions. [2022-07-13 11:36:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:36:15,026 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 [2022-07-13 11:36:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:15,034 INFO L225 Difference]: With dead ends: 5300 [2022-07-13 11:36:15,034 INFO L226 Difference]: Without dead ends: 5280 [2022-07-13 11:36:15,035 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 [2022-07-13 11:36:15,035 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 947 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 467 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 2997 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:15,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 2997 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1691 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-13 11:36:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-07-13 11:36:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4422. [2022-07-13 11:36:15,281 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) [2022-07-13 11:36:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6567 transitions. [2022-07-13 11:36:15,290 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6567 transitions. Word has length 68 [2022-07-13 11:36:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:15,291 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 6567 transitions. [2022-07-13 11:36:15,291 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) [2022-07-13 11:36:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6567 transitions. [2022-07-13 11:36:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 11:36:15,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:15,292 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] [2022-07-13 11:36:15,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-13 11:36:15,293 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2022-07-13 11:36:15,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:15,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194851591] [2022-07-13 11:36:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:15,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:15,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:15,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:36:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:15,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 11:36:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:15,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194851591] [2022-07-13 11:36:15,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194851591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:15,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:15,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:36:15,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037990884] [2022-07-13 11:36:15,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:15,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:36:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:36:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:36:15,546 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) [2022-07-13 11:36:19,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:20,746 INFO L93 Difference]: Finished difference Result 5362 states and 8158 transitions. [2022-07-13 11:36:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:36:20,747 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 [2022-07-13 11:36:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:20,759 INFO L225 Difference]: With dead ends: 5362 [2022-07-13 11:36:20,759 INFO L226 Difference]: Without dead ends: 5346 [2022-07-13 11:36:20,761 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 [2022-07-13 11:36:20,762 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 959 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:20,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 3405 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2101 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-07-13 11:36:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2022-07-13 11:36:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4427. [2022-07-13 11:36:21,040 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) [2022-07-13 11:36:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6576 transitions. [2022-07-13 11:36:21,049 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6576 transitions. Word has length 69 [2022-07-13 11:36:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:21,049 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6576 transitions. [2022-07-13 11:36:21,049 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) [2022-07-13 11:36:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6576 transitions. [2022-07-13 11:36:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 11:36:21,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:21,051 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] [2022-07-13 11:36:21,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 11:36:21,051 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2022-07-13 11:36:21,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:21,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108656872] [2022-07-13 11:36:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:21,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:21,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:21,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:36:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:21,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 11:36:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:21,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:21,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108656872] [2022-07-13 11:36:21,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108656872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:21,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:21,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:36:21,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639169786] [2022-07-13 11:36:21,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:21,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:36:21,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:36:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:36:21,307 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) [2022-07-13 11:36:25,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:27,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:28,141 INFO L93 Difference]: Finished difference Result 9525 states and 14480 transitions. [2022-07-13 11:36:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:36:28,142 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 [2022-07-13 11:36:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:28,154 INFO L225 Difference]: With dead ends: 9525 [2022-07-13 11:36:28,154 INFO L226 Difference]: Without dead ends: 5473 [2022-07-13 11:36:28,162 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 [2022-07-13 11:36:28,163 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 382 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 120 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:28,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2613 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1363 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-07-13 11:36:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2022-07-13 11:36:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4455. [2022-07-13 11:36:28,449 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) [2022-07-13 11:36:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 6604 transitions. [2022-07-13 11:36:28,458 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 6604 transitions. Word has length 69 [2022-07-13 11:36:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:28,458 INFO L495 AbstractCegarLoop]: Abstraction has 4455 states and 6604 transitions. [2022-07-13 11:36:28,459 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) [2022-07-13 11:36:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 6604 transitions. [2022-07-13 11:36:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 11:36:28,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:28,460 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] [2022-07-13 11:36:28,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-13 11:36:28,460 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2022-07-13 11:36:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71756601] [2022-07-13 11:36:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:28,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:28,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:36:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:28,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 11:36:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:28,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:28,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71756601] [2022-07-13 11:36:28,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71756601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:28,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:28,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:36:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203884903] [2022-07-13 11:36:28,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:28,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:36:28,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:28,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:36:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:36:28,721 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) [2022-07-13 11:36:32,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:33,326 INFO L93 Difference]: Finished difference Result 9445 states and 14286 transitions. [2022-07-13 11:36:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:36:33,327 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 [2022-07-13 11:36:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:33,338 INFO L225 Difference]: With dead ends: 9445 [2022-07-13 11:36:33,338 INFO L226 Difference]: Without dead ends: 5384 [2022-07-13 11:36:33,345 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 [2022-07-13 11:36:33,345 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 539 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 402 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:33,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 3241 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1588 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-13 11:36:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2022-07-13 11:36:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4434. [2022-07-13 11:36:33,625 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) [2022-07-13 11:36:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6545 transitions. [2022-07-13 11:36:33,636 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6545 transitions. Word has length 69 [2022-07-13 11:36:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:33,637 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6545 transitions. [2022-07-13 11:36:33,637 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) [2022-07-13 11:36:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6545 transitions. [2022-07-13 11:36:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 11:36:33,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:33,638 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] [2022-07-13 11:36:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 11:36:33,639 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2022-07-13 11:36:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103796446] [2022-07-13 11:36:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:33,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:33,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:36:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:33,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 11:36:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:36:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:33,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103796446] [2022-07-13 11:36:33,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103796446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:33,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:33,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:36:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137457088] [2022-07-13 11:36:33,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:36:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:36:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:36:33,877 INFO L87 Difference]: Start difference. First operand 4434 states and 6545 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:36:36,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:40,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:42,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:44,150 INFO L93 Difference]: Finished difference Result 8059 states and 12189 transitions. [2022-07-13 11:36:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:36:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-07-13 11:36:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:44,170 INFO L225 Difference]: With dead ends: 8059 [2022-07-13 11:36:44,171 INFO L226 Difference]: Without dead ends: 5579 [2022-07-13 11:36:44,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:36:44,176 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 871 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 380 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 3211 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:44,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 3211 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2168 Invalid, 3 Unknown, 0 Unchecked, 9.7s Time] [2022-07-13 11:36:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2022-07-13 11:36:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 4492. [2022-07-13 11:36:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 3816 states have (on average 1.44916142557652) internal successors, (5530), 3940 states have internal predecessors, (5530), 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) [2022-07-13 11:36:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 6634 transitions. [2022-07-13 11:36:44,525 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 6634 transitions. Word has length 71 [2022-07-13 11:36:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:44,526 INFO L495 AbstractCegarLoop]: Abstraction has 4492 states and 6634 transitions. [2022-07-13 11:36:44,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:36:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 6634 transitions. [2022-07-13 11:36:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 11:36:44,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:44,528 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] [2022-07-13 11:36:44,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-13 11:36:44,528 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2022-07-13 11:36:44,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:44,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741933415] [2022-07-13 11:36:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:44,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:44,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:36:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:36:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:44,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741933415] [2022-07-13 11:36:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741933415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:44,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:44,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:36:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407061773] [2022-07-13 11:36:44,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:44,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:36:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:36:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:36:44,759 INFO L87 Difference]: Start difference. First operand 4492 states and 6634 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) [2022-07-13 11:36:48,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:49,692 INFO L93 Difference]: Finished difference Result 9698 states and 14628 transitions. [2022-07-13 11:36:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:36:49,694 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 [2022-07-13 11:36:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:49,704 INFO L225 Difference]: With dead ends: 9698 [2022-07-13 11:36:49,705 INFO L226 Difference]: Without dead ends: 5600 [2022-07-13 11:36:49,712 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 [2022-07-13 11:36:49,713 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 486 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 320 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:49,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 2734 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1331 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-07-13 11:36:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2022-07-13 11:36:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 4504. [2022-07-13 11:36:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 3828 states have (on average 1.4477533960292581) internal successors, (5542), 3940 states have internal predecessors, (5542), 465 states have call successors, (465), 161 states have call predecessors, (465), 210 states have return successors, (639), 417 states have call predecessors, (639), 448 states have call successors, (639) [2022-07-13 11:36:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6646 transitions. [2022-07-13 11:36:50,044 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6646 transitions. Word has length 70 [2022-07-13 11:36:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:50,045 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 6646 transitions. [2022-07-13 11:36:50,045 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) [2022-07-13 11:36:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6646 transitions. [2022-07-13 11:36:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 11:36:50,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:50,046 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] [2022-07-13 11:36:50,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 11:36:50,047 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash 965591191, now seen corresponding path program 1 times [2022-07-13 11:36:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:50,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059516695] [2022-07-13 11:36:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:50,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:50,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:50,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 11:36:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:50,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:50,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059516695] [2022-07-13 11:36:50,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059516695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:50,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:50,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:36:50,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664596729] [2022-07-13 11:36:50,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:50,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:36:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:50,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:36:50,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:36:50,263 INFO L87 Difference]: Start difference. First operand 4504 states and 6646 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) [2022-07-13 11:36:55,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:36:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:36:56,312 INFO L93 Difference]: Finished difference Result 5384 states and 8102 transitions. [2022-07-13 11:36:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:36:56,317 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 69 [2022-07-13 11:36:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:36:56,325 INFO L225 Difference]: With dead ends: 5384 [2022-07-13 11:36:56,325 INFO L226 Difference]: Without dead ends: 5362 [2022-07-13 11:36:56,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:36:56,327 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 871 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 359 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 4188 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:36:56,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 4188 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2836 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-07-13 11:36:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2022-07-13 11:36:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4499. [2022-07-13 11:36:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 3824 states have (on average 1.4479602510460252) internal successors, (5537), 3936 states have internal predecessors, (5537), 464 states have call successors, (464), 161 states have call predecessors, (464), 210 states have return successors, (638), 416 states have call predecessors, (638), 447 states have call successors, (638) [2022-07-13 11:36:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 6639 transitions. [2022-07-13 11:36:56,607 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 6639 transitions. Word has length 69 [2022-07-13 11:36:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:36:56,607 INFO L495 AbstractCegarLoop]: Abstraction has 4499 states and 6639 transitions. [2022-07-13 11:36:56,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-13 11:36:56,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 6639 transitions. [2022-07-13 11:36:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 11:36:56,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:36:56,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:36:56,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-13 11:36:56,609 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:36:56,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:36:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2005419428, now seen corresponding path program 1 times [2022-07-13 11:36:56,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:36:56,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100331096] [2022-07-13 11:36:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:36:56,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:36:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:36:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:56,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:36:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:56,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 11:36:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:56,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 11:36:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:56,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 11:36:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:36:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:36:56,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:36:56,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100331096] [2022-07-13 11:36:56,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100331096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:36:56,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:36:56,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:36:56,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308069022] [2022-07-13 11:36:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:36:56,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:36:56,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:36:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:36:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:36:56,804 INFO L87 Difference]: Start difference. First operand 4499 states and 6639 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:37:01,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:03,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:04,816 INFO L93 Difference]: Finished difference Result 9671 states and 14461 transitions. [2022-07-13 11:37:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:37:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 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 [2022-07-13 11:37:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:04,828 INFO L225 Difference]: With dead ends: 9671 [2022-07-13 11:37:04,829 INFO L226 Difference]: Without dead ends: 5575 [2022-07-13 11:37:04,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:37:04,837 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 917 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 215 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:04,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 2195 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1447 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-07-13 11:37:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2022-07-13 11:37:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 4515. [2022-07-13 11:37:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4515 states, 3840 states have (on average 1.44609375) internal successors, (5553), 3952 states have internal predecessors, (5553), 464 states have call successors, (464), 161 states have call predecessors, (464), 210 states have return successors, (638), 416 states have call predecessors, (638), 447 states have call successors, (638) [2022-07-13 11:37:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 6655 transitions. [2022-07-13 11:37:05,158 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 6655 transitions. Word has length 71 [2022-07-13 11:37:05,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:05,158 INFO L495 AbstractCegarLoop]: Abstraction has 4515 states and 6655 transitions. [2022-07-13 11:37:05,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:37:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 6655 transitions. [2022-07-13 11:37:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 11:37:05,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:05,160 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] [2022-07-13 11:37:05,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-13 11:37:05,160 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash 885604175, now seen corresponding path program 1 times [2022-07-13 11:37:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511313091] [2022-07-13 11:37:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:05,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:37:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:05,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:37:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:05,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 11:37:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:05,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511313091] [2022-07-13 11:37:05,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511313091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:05,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:05,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:37:05,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052855106] [2022-07-13 11:37:05,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:05,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:37:05,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:37:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:37:05,437 INFO L87 Difference]: Start difference. First operand 4515 states and 6655 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) [2022-07-13 11:37:10,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:37:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:37:11,764 INFO L93 Difference]: Finished difference Result 5407 states and 8123 transitions. [2022-07-13 11:37:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:37:11,765 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 69 [2022-07-13 11:37:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:37:11,775 INFO L225 Difference]: With dead ends: 5407 [2022-07-13 11:37:11,775 INFO L226 Difference]: Without dead ends: 5386 [2022-07-13 11:37:11,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:37:11,777 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 871 mSDsluCounter, 3479 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 357 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 4126 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:37:11,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 4126 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2822 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-07-13 11:37:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2022-07-13 11:37:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 4511. [2022-07-13 11:37:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3837 states have (on average 1.4461819129528277) internal successors, (5549), 3949 states have internal predecessors, (5549), 463 states have call successors, (463), 161 states have call predecessors, (463), 210 states have return successors, (637), 415 states have call predecessors, (637), 446 states have call successors, (637) [2022-07-13 11:37:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6649 transitions. [2022-07-13 11:37:12,155 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6649 transitions. Word has length 69 [2022-07-13 11:37:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:37:12,156 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6649 transitions. [2022-07-13 11:37:12,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-13 11:37:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6649 transitions. [2022-07-13 11:37:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 11:37:12,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:37:12,157 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] [2022-07-13 11:37:12,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-13 11:37:12,158 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:37:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:37:12,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1081372361, now seen corresponding path program 1 times [2022-07-13 11:37:12,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:37:12,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16783894] [2022-07-13 11:37:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:37:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:37:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:12,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 11:37:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:12,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 11:37:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:12,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:37:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:12,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:37:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:37:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:37:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:37:12,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16783894] [2022-07-13 11:37:12,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16783894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:37:12,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:37:12,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:37:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898127857] [2022-07-13 11:37:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:37:12,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:37:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:37:12,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:37:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:37:12,355 INFO L87 Difference]: Start difference. First operand 4511 states and 6649 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 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)