./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 7e1ff0e6 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-?-7e1ff0e [2023-02-14 22:36:12,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:36:12,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:36:12,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:36:12,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:36:12,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:36:12,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:36:12,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:36:12,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:36:12,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:36:12,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:36:12,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:36:12,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:36:12,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:36:12,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:36:12,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:36:12,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:36:12,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:36:12,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:36:12,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:36:12,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:36:12,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:36:12,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:36:12,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:36:12,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:36:12,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:36:12,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:36:12,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:36:12,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:36:12,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:36:12,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:36:12,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:36:12,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:36:12,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:36:12,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:36:12,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:36:12,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:36:12,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:36:12,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:36:12,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:36:12,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:36:12,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:36:12,508 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:36:12,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:36:12,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:36:12,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:36:12,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:36:12,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:36:12,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:36:12,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:36:12,514 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:36:12,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:36:12,514 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:36:12,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:36:12,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:36:12,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:36:12,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:36:12,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:36:12,516 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:36:12,517 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2023-02-14 22:36:12,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:36:12,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:36:12,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:36:12,700 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:36:12,700 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:36:12,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-14 22:36:13,612 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:36:14,039 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:36:14,040 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-14 22:36:14,071 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b617a60/24778314aa554511a6a6408735e4f381/FLAG2e65cdcd4 [2023-02-14 22:36:14,085 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b617a60/24778314aa554511a6a6408735e4f381 [2023-02-14 22:36:14,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:36:14,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:36:14,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:36:14,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:36:14,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:36:14,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:36:14" (1/1) ... [2023-02-14 22:36:14,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad4e23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:14, skipping insertion in model container [2023-02-14 22:36:14,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:36:14" (1/1) ... [2023-02-14 22:36:14,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:36:14,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:36:14,649 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-02-14 22:36:14,673 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-14 22:36:14,681 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-14 22:36:14,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:36:14,944 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:36:14,997 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-02-14 22:36:15,007 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-14 22:36:15,010 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-14 22:36:15,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:36:15,249 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:36:15,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15 WrapperNode [2023-02-14 22:36:15,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:36:15,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:36:15,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:36:15,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:36:15,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,405 INFO L138 Inliner]: procedures = 128, calls = 2895, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3094 [2023-02-14 22:36:15,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:36:15,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:36:15,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:36:15,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:36:15,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,553 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:36:15,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:36:15,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:36:15,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:36:15,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (1/1) ... [2023-02-14 22:36:15,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:36:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:36:15,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 22:36:15,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 22:36:15,666 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2023-02-14 22:36:15,666 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2023-02-14 22:36:15,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-14 22:36:15,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-14 22:36:15,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-14 22:36:15,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 22:36:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-14 22:36:15,667 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-14 22:36:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2023-02-14 22:36:15,667 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2023-02-14 22:36:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2023-02-14 22:36:15,667 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2023-02-14 22:36:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 22:36:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2023-02-14 22:36:15,667 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2023-02-14 22:36:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-14 22:36:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-14 22:36:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2023-02-14 22:36:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2023-02-14 22:36:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-14 22:36:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-14 22:36:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-14 22:36:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-14 22:36:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2023-02-14 22:36:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2023-02-14 22:36:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2023-02-14 22:36:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2023-02-14 22:36:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:36:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:36:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2023-02-14 22:36:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2023-02-14 22:36:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2023-02-14 22:36:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2023-02-14 22:36:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 22:36:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 22:36:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-14 22:36:15,671 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-14 22:36:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 22:36:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2023-02-14 22:36:15,671 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2023-02-14 22:36:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 22:36:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-14 22:36:15,671 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-14 22:36:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-02-14 22:36:15,672 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-02-14 22:36:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:36:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-02-14 22:36:15,673 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-02-14 22:36:15,673 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2023-02-14 22:36:15,673 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2023-02-14 22:36:15,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-14 22:36:15,674 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-14 22:36:15,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-14 22:36:15,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:36:15,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:36:16,035 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:36:16,037 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:36:16,069 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,082 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-14 22:36:16,082 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-14 22:36:16,083 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,208 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-14 22:36:16,208 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-14 22:36:16,222 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,231 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-14 22:36:16,231 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-14 22:36:16,284 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,298 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2023-02-14 22:36:16,299 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2023-02-14 22:36:16,299 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,300 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,300 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,382 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2023-02-14 22:36:16,382 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-14 22:36:16,382 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-14 22:36:16,382 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2023-02-14 22:36:16,382 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2023-02-14 22:36:16,382 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2023-02-14 22:36:16,383 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,386 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,387 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,662 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2023-02-14 22:36:16,662 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2023-02-14 22:36:16,662 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2023-02-14 22:36:16,662 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2023-02-14 22:36:16,662 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2023-02-14 22:36:16,662 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2023-02-14 22:36:16,683 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,702 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-14 22:36:16,702 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-14 22:36:16,706 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,706 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,707 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,708 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,708 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,710 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,710 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:16,711 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2023-02-14 22:36:19,671 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2023-02-14 22:36:19,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2023-02-14 22:36:19,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2023-02-14 22:36:19,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2023-02-14 22:36:19,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2023-02-14 22:36:19,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2023-02-14 22:36:19,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2023-02-14 22:36:19,682 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:36:19,689 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:36:19,690 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-14 22:36:19,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:36:19 BoogieIcfgContainer [2023-02-14 22:36:19,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:36:19,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:36:19,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:36:19,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:36:19,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:36:14" (1/3) ... [2023-02-14 22:36:19,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712fef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:36:19, skipping insertion in model container [2023-02-14 22:36:19,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:36:15" (2/3) ... [2023-02-14 22:36:19,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712fef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:36:19, skipping insertion in model container [2023-02-14 22:36:19,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:36:19" (3/3) ... [2023-02-14 22:36:19,697 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2023-02-14 22:36:19,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:36:19,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:36:19,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:36:19,747 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e4c2a33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:36:19,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:36:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2023-02-14 22:36:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 22:36:19,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:19,759 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] [2023-02-14 22:36:19,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:19,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:19,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2023-02-14 22:36:19,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:19,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322845904] [2023-02-14 22:36:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:19,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:20,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:20,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:20,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322845904] [2023-02-14 22:36:20,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322845904] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:20,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:20,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:20,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780347347] [2023-02-14 22:36:20,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:20,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:20,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:20,244 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:36:23,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:23,939 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2023-02-14 22:36:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:36:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-14 22:36:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:24,002 INFO L225 Difference]: With dead ends: 1174 [2023-02-14 22:36:24,002 INFO L226 Difference]: Without dead ends: 657 [2023-02-14 22:36:24,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:36:24,015 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 419 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 219 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:24,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 2054 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 887 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-02-14 22:36:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-14 22:36:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-14 22:36:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-14 22:36:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2023-02-14 22:36:24,082 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2023-02-14 22:36:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:24,082 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2023-02-14 22:36:24,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:36:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2023-02-14 22:36:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 22:36:24,084 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:24,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 22:36:24,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2023-02-14 22:36:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483284054] [2023-02-14 22:36:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:24,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:24,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:24,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483284054] [2023-02-14 22:36:24,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483284054] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:24,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:24,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:36:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136046247] [2023-02-14 22:36:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:24,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:36:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:36:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:36:24,327 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:28,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:28,206 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2023-02-14 22:36:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:36:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-14 22:36:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:28,213 INFO L225 Difference]: With dead ends: 1217 [2023-02-14 22:36:28,213 INFO L226 Difference]: Without dead ends: 657 [2023-02-14 22:36:28,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:36:28,215 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 381 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 213 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:28,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 2663 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1088 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-02-14 22:36:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-14 22:36:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-14 22:36:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-14 22:36:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2023-02-14 22:36:28,264 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2023-02-14 22:36:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:28,264 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2023-02-14 22:36:28,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2023-02-14 22:36:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 22:36:28,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:28,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 22:36:28,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2023-02-14 22:36:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214417643] [2023-02-14 22:36:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:28,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:28,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214417643] [2023-02-14 22:36:28,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214417643] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:28,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:28,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037961816] [2023-02-14 22:36:28,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:28,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:28,698 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:32,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:33,269 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2023-02-14 22:36:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:36:33,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-02-14 22:36:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:33,274 INFO L225 Difference]: With dead ends: 1542 [2023-02-14 22:36:33,274 INFO L226 Difference]: Without dead ends: 1127 [2023-02-14 22:36:33,276 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 [2023-02-14 22:36:33,278 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 1376 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:33,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2308 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1152 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-14 22:36:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-02-14 22:36:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2023-02-14 22:36:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2023-02-14 22:36:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2023-02-14 22:36:33,321 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2023-02-14 22:36:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:33,322 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2023-02-14 22:36:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2023-02-14 22:36:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 22:36:33,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:33,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:33,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 22:36:33,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2023-02-14 22:36:33,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:33,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364453808] [2023-02-14 22:36:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:33,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:33,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:36:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:33,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:33,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364453808] [2023-02-14 22:36:33,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364453808] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:33,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:33,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:33,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178665853] [2023-02-14 22:36:33,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:33,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:33,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:33,697 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:36:37,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:37,798 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2023-02-14 22:36:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:36:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2023-02-14 22:36:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:37,805 INFO L225 Difference]: With dead ends: 1879 [2023-02-14 22:36:37,805 INFO L226 Difference]: Without dead ends: 1860 [2023-02-14 22:36:37,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:36:37,807 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 1502 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 364 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:37,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 1947 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 926 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-14 22:36:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2023-02-14 22:36:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2023-02-14 22:36:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2023-02-14 22:36:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2023-02-14 22:36:37,856 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2023-02-14 22:36:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:37,857 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2023-02-14 22:36:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:36:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2023-02-14 22:36:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 22:36:37,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:37,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 22:36:37,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2023-02-14 22:36:37,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:37,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487827484] [2023-02-14 22:36:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:37,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:38,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:38,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:38,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:38,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487827484] [2023-02-14 22:36:38,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487827484] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:38,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:38,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:38,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350351760] [2023-02-14 22:36:38,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:38,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:38,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:38,057 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:41,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:41,753 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2023-02-14 22:36:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:36:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-02-14 22:36:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:41,760 INFO L225 Difference]: With dead ends: 1856 [2023-02-14 22:36:41,760 INFO L226 Difference]: Without dead ends: 1852 [2023-02-14 22:36:41,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:36:41,761 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 492 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 221 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:41,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1939 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 871 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-02-14 22:36:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2023-02-14 22:36:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2023-02-14 22:36:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2023-02-14 22:36:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2023-02-14 22:36:41,805 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2023-02-14 22:36:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:41,805 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2023-02-14 22:36:41,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2023-02-14 22:36:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 22:36:41,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:41,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 22:36:41,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2023-02-14 22:36:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057241321] [2023-02-14 22:36:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:41,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:41,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:41,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057241321] [2023-02-14 22:36:41,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057241321] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:41,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:41,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:36:41,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131654222] [2023-02-14 22:36:41,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:41,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:36:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:36:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:36:41,945 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:45,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:47,654 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2023-02-14 22:36:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:36:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-14 22:36:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:47,669 INFO L225 Difference]: With dead ends: 3293 [2023-02-14 22:36:47,669 INFO L226 Difference]: Without dead ends: 3290 [2023-02-14 22:36:47,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:36:47,671 INFO L413 NwaCegarLoop]: 1008 mSDtfsCounter, 958 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:47,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 2787 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1355 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-02-14 22:36:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2023-02-14 22:36:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2023-02-14 22:36:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2023-02-14 22:36:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2023-02-14 22:36:47,761 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2023-02-14 22:36:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:47,762 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2023-02-14 22:36:47,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:36:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2023-02-14 22:36:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 22:36:47,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:47,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:47,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 22:36:47,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2023-02-14 22:36:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:47,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843807819] [2023-02-14 22:36:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:47,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:48,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:48,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:48,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:36:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 22:36:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:48,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843807819] [2023-02-14 22:36:48,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843807819] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:48,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:48,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:36:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336165468] [2023-02-14 22:36:48,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:36:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:36:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:36:48,135 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:36:52,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:36:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:36:54,353 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2023-02-14 22:36:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 22:36:54,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-02-14 22:36:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:36:54,367 INFO L225 Difference]: With dead ends: 3942 [2023-02-14 22:36:54,367 INFO L226 Difference]: Without dead ends: 3937 [2023-02-14 22:36:54,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-14 22:36:54,370 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 1306 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 545 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-02-14 22:36:54,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 2694 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 1848 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2023-02-14 22:36:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2023-02-14 22:36:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2023-02-14 22:36:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2023-02-14 22:36:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2023-02-14 22:36:54,483 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2023-02-14 22:36:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:36:54,483 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2023-02-14 22:36:54,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:36:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2023-02-14 22:36:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 22:36:54,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:36:54,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:36:54,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 22:36:54,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:36:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:36:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2023-02-14 22:36:54,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:36:54,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352257564] [2023-02-14 22:36:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:36:54,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:36:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:54,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:36:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:36:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:36:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:36:54,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:36:54,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352257564] [2023-02-14 22:36:54,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352257564] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:36:54,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:36:54,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:36:54,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629073055] [2023-02-14 22:36:54,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:36:54,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:36:54,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:36:54,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:36:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:36:54,837 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:36:58,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:00,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:01,745 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2023-02-14 22:37:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:37:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2023-02-14 22:37:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:01,759 INFO L225 Difference]: With dead ends: 7046 [2023-02-14 22:37:01,759 INFO L226 Difference]: Without dead ends: 4021 [2023-02-14 22:37:01,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:37:01,767 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 2405 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 681 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:01,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 2159 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 1285 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2023-02-14 22:37:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2023-02-14 22:37:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2023-02-14 22:37:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2023-02-14 22:37:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2023-02-14 22:37:01,885 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2023-02-14 22:37:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:01,886 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2023-02-14 22:37:01,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:37:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2023-02-14 22:37:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 22:37:01,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:01,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:37:01,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 22:37:01,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:01,888 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2023-02-14 22:37:01,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:01,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172595255] [2023-02-14 22:37:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:01,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:02,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:02,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:02,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 22:37:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:02,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:02,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172595255] [2023-02-14 22:37:02,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172595255] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:02,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:02,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:37:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31318377] [2023-02-14 22:37:02,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:37:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:37:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:37:02,053 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:37:05,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:06,625 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2023-02-14 22:37:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:37:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-02-14 22:37:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:06,673 INFO L225 Difference]: With dead ends: 10834 [2023-02-14 22:37:06,674 INFO L226 Difference]: Without dead ends: 7785 [2023-02-14 22:37:06,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:37:06,693 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 2172 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 628 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:06,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 2569 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1381 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-14 22:37:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2023-02-14 22:37:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2023-02-14 22:37:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-14 22:37:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2023-02-14 22:37:07,047 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2023-02-14 22:37:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:07,047 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2023-02-14 22:37:07,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:37:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2023-02-14 22:37:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 22:37:07,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:07,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:37:07,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 22:37:07,049 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2023-02-14 22:37:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:07,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630631747] [2023-02-14 22:37:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:07,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:07,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:07,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:07,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 22:37:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:07,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 22:37:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:07,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630631747] [2023-02-14 22:37:07,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630631747] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:07,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:07,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:37:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802850311] [2023-02-14 22:37:07,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:37:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:37:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:37:07,517 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:37:11,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:14,405 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2023-02-14 22:37:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 22:37:14,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-02-14 22:37:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:14,425 INFO L225 Difference]: With dead ends: 7819 [2023-02-14 22:37:14,425 INFO L226 Difference]: Without dead ends: 7813 [2023-02-14 22:37:14,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-14 22:37:14,429 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2829 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 998 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2892 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:14,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2892 Valid, 2985 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2276 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2023-02-14 22:37:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2023-02-14 22:37:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2023-02-14 22:37:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-14 22:37:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2023-02-14 22:37:14,804 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2023-02-14 22:37:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:14,805 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2023-02-14 22:37:14,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:37:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2023-02-14 22:37:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:37:14,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:14,807 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] [2023-02-14 22:37:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-14 22:37:14,807 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 677869713, now seen corresponding path program 1 times [2023-02-14 22:37:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:14,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920266220] [2023-02-14 22:37:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 22:37:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 22:37:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:15,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:15,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920266220] [2023-02-14 22:37:15,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920266220] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:15,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:15,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:37:15,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11502129] [2023-02-14 22:37:15,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:15,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:37:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:15,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:37:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:37:15,181 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) [2023-02-14 22:37:20,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:22,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:24,558 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2023-02-14 22:37:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 22:37:24,559 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 [2023-02-14 22:37:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:24,576 INFO L225 Difference]: With dead ends: 7815 [2023-02-14 22:37:24,576 INFO L226 Difference]: Without dead ends: 7809 [2023-02-14 22:37:24,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-14 22:37:24,579 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2415 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 754 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:24,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2476 Valid, 3330 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 2808 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2023-02-14 22:37:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2023-02-14 22:37:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2023-02-14 22:37:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-14 22:37:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2023-02-14 22:37:24,933 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 49 [2023-02-14 22:37:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:24,934 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2023-02-14 22:37:24,934 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) [2023-02-14 22:37:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2023-02-14 22:37:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 22:37:24,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:24,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:37:24,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 22:37:24,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2023-02-14 22:37:24,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:24,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104282264] [2023-02-14 22:37:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:25,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:25,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:25,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:37:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:25,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 22:37:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104282264] [2023-02-14 22:37:25,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104282264] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:25,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:25,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:37:25,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148911383] [2023-02-14 22:37:25,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:25,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:37:25,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:25,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:37:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:37:25,230 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:37:29,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:31,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:32,802 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2023-02-14 22:37:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:37:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-02-14 22:37:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:32,820 INFO L225 Difference]: With dead ends: 7824 [2023-02-14 22:37:32,820 INFO L226 Difference]: Without dead ends: 7807 [2023-02-14 22:37:32,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:37:32,825 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 716 mSDsluCounter, 2880 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 240 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:32,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 3470 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2282 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-02-14 22:37:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2023-02-14 22:37:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2023-02-14 22:37:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2023-02-14 22:37:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2023-02-14 22:37:33,157 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 51 [2023-02-14 22:37:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:33,157 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2023-02-14 22:37:33,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:37:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2023-02-14 22:37:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 22:37:33,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:33,160 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] [2023-02-14 22:37:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-14 22:37:33,160 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2023-02-14 22:37:33,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:33,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332091986] [2023-02-14 22:37:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:33,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:33,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:33,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 22:37:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:33,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 22:37:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:33,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332091986] [2023-02-14 22:37:33,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332091986] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:33,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:33,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:37:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936440344] [2023-02-14 22:37:33,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:37:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:37:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:37:33,494 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:37:37,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:39,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:40,787 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2023-02-14 22:37:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:37:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-02-14 22:37:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:40,832 INFO L225 Difference]: With dead ends: 7822 [2023-02-14 22:37:40,848 INFO L226 Difference]: Without dead ends: 7800 [2023-02-14 22:37:40,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:37:40,855 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 716 mSDsluCounter, 2802 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 238 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:40,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 3376 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2264 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2023-02-14 22:37:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2023-02-14 22:37:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2023-02-14 22:37:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2023-02-14 22:37:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2023-02-14 22:37:41,268 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 50 [2023-02-14 22:37:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:41,269 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2023-02-14 22:37:41,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:37:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2023-02-14 22:37:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:37:41,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:41,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:37:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-14 22:37:41,271 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2023-02-14 22:37:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751742325] [2023-02-14 22:37:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:41,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:41,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:41,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:37:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:41,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:41,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751742325] [2023-02-14 22:37:41,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751742325] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:41,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:41,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:37:41,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586477107] [2023-02-14 22:37:41,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:41,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:37:41,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:37:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:37:41,496 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:37:45,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:46,619 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2023-02-14 22:37:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:37:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-14 22:37:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:46,640 INFO L225 Difference]: With dead ends: 13804 [2023-02-14 22:37:46,640 INFO L226 Difference]: Without dead ends: 8064 [2023-02-14 22:37:46,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:37:46,666 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 434 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:46,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1981 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1010 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-02-14 22:37:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2023-02-14 22:37:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2023-02-14 22:37:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2023-02-14 22:37:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2023-02-14 22:37:47,138 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2023-02-14 22:37:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:47,139 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2023-02-14 22:37:47,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:37:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2023-02-14 22:37:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 22:37:47,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:47,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:37:47,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-14 22:37:47,141 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2023-02-14 22:37:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:47,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023760185] [2023-02-14 22:37:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:47,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:47,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:47,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:47,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-14 22:37:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:47,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023760185] [2023-02-14 22:37:47,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023760185] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:47,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:47,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:37:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125150505] [2023-02-14 22:37:47,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:47,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:37:47,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:47,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:37:47,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:37:47,355 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:37:51,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:52,511 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2023-02-14 22:37:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:37:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-02-14 22:37:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:52,529 INFO L225 Difference]: With dead ends: 8020 [2023-02-14 22:37:52,529 INFO L226 Difference]: Without dead ends: 8002 [2023-02-14 22:37:52,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:37:52,534 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 907 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 335 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 2676 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:52,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 2676 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1532 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2023-02-14 22:37:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2023-02-14 22:37:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2023-02-14 22:37:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2023-02-14 22:37:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2023-02-14 22:37:52,929 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2023-02-14 22:37:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:52,930 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2023-02-14 22:37:52,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:37:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2023-02-14 22:37:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:37:52,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:52,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:37:52,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-14 22:37:52,931 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2023-02-14 22:37:52,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:52,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460469084] [2023-02-14 22:37:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:53,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:53,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460469084] [2023-02-14 22:37:53,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460469084] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:53,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:53,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:37:53,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211111290] [2023-02-14 22:37:53,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:53,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:37:53,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:37:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:37:53,168 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:37:56,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:37:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:37:57,646 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2023-02-14 22:37:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:37:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2023-02-14 22:37:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:37:57,663 INFO L225 Difference]: With dead ends: 11721 [2023-02-14 22:37:57,663 INFO L226 Difference]: Without dead ends: 7953 [2023-02-14 22:37:57,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:37:57,680 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1226 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 311 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:37:57,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1759 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1005 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-14 22:37:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2023-02-14 22:37:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2023-02-14 22:37:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2023-02-14 22:37:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2023-02-14 22:37:58,154 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2023-02-14 22:37:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:37:58,155 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2023-02-14 22:37:58,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:37:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2023-02-14 22:37:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 22:37:58,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:37:58,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:37:58,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 22:37:58,157 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:37:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:37:58,157 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2023-02-14 22:37:58,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:37:58,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915474731] [2023-02-14 22:37:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:37:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:37:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:58,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:37:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:58,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:37:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:58,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:37:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-14 22:37:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:37:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:37:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:37:58,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915474731] [2023-02-14 22:37:58,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915474731] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:37:58,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:37:58,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:37:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630555240] [2023-02-14 22:37:58,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:37:58,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:37:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:37:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:37:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:37:58,426 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:38:01,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:02,999 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2023-02-14 22:38:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:38:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2023-02-14 22:38:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:03,019 INFO L225 Difference]: With dead ends: 8024 [2023-02-14 22:38:03,019 INFO L226 Difference]: Without dead ends: 8008 [2023-02-14 22:38:03,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:38:03,023 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 978 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 430 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:03,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 3182 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1867 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-14 22:38:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2023-02-14 22:38:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2023-02-14 22:38:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2023-02-14 22:38:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2023-02-14 22:38:03,483 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2023-02-14 22:38:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:03,484 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2023-02-14 22:38:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:38:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2023-02-14 22:38:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 22:38:03,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:03,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:03,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-14 22:38:03,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:03,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2023-02-14 22:38:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:03,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271483597] [2023-02-14 22:38:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:03,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:03,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271483597] [2023-02-14 22:38:03,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271483597] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:03,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:03,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:38:03,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381861073] [2023-02-14 22:38:03,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:03,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:38:03,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:03,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:38:03,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:38:03,629 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:38:06,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:09,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:10,896 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2023-02-14 22:38:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:38:10,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-14 22:38:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:10,918 INFO L225 Difference]: With dead ends: 10992 [2023-02-14 22:38:10,919 INFO L226 Difference]: Without dead ends: 10979 [2023-02-14 22:38:10,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:38:10,922 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 998 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 276 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:10,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 2831 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1357 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2023-02-14 22:38:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2023-02-14 22:38:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2023-02-14 22:38:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2023-02-14 22:38:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2023-02-14 22:38:11,432 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2023-02-14 22:38:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:11,433 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2023-02-14 22:38:11,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:38:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2023-02-14 22:38:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 22:38:11,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:11,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-14 22:38:11,435 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2023-02-14 22:38:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:11,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501064499] [2023-02-14 22:38:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:11,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:11,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:11,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501064499] [2023-02-14 22:38:11,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501064499] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:11,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:11,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:38:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592976717] [2023-02-14 22:38:11,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:11,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:38:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:38:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:38:11,647 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:38:15,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:16,225 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2023-02-14 22:38:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:38:16,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-02-14 22:38:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:16,246 INFO L225 Difference]: With dead ends: 13163 [2023-02-14 22:38:16,246 INFO L226 Difference]: Without dead ends: 8839 [2023-02-14 22:38:16,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:38:16,260 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1208 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 296 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:16,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1759 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-14 22:38:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2023-02-14 22:38:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2023-02-14 22:38:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2023-02-14 22:38:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2023-02-14 22:38:16,667 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2023-02-14 22:38:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:16,668 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2023-02-14 22:38:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:38:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2023-02-14 22:38:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 22:38:16,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:16,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:16,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-14 22:38:16,669 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2023-02-14 22:38:16,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:16,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594806334] [2023-02-14 22:38:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:16,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:16,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:38:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:16,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:16,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594806334] [2023-02-14 22:38:16,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594806334] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:16,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:16,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:38:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370079693] [2023-02-14 22:38:16,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:16,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:38:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:38:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:38:16,889 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:38:20,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:21,895 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2023-02-14 22:38:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:38:21,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-14 22:38:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:21,917 INFO L225 Difference]: With dead ends: 7691 [2023-02-14 22:38:21,918 INFO L226 Difference]: Without dead ends: 7673 [2023-02-14 22:38:21,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:38:21,923 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 900 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 332 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:21,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 2682 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1531 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-14 22:38:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2023-02-14 22:38:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2023-02-14 22:38:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2023-02-14 22:38:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2023-02-14 22:38:22,400 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2023-02-14 22:38:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:22,400 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2023-02-14 22:38:22,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:38:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2023-02-14 22:38:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 22:38:22,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:22,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:22,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-14 22:38:22,402 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2023-02-14 22:38:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909636676] [2023-02-14 22:38:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:22,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:22,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:22,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:22,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:22,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909636676] [2023-02-14 22:38:22,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909636676] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:22,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:22,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:38:22,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451646922] [2023-02-14 22:38:22,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:22,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:38:22,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:22,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:38:22,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:38:22,652 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:38:25,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:27,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:29,442 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2023-02-14 22:38:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:38:29,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-02-14 22:38:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:29,466 INFO L225 Difference]: With dead ends: 9126 [2023-02-14 22:38:29,466 INFO L226 Difference]: Without dead ends: 9122 [2023-02-14 22:38:29,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:38:29,471 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 1708 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 487 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:29,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 2616 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1436 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2023-02-14 22:38:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2023-02-14 22:38:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2023-02-14 22:38:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2023-02-14 22:38:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2023-02-14 22:38:29,970 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2023-02-14 22:38:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:29,970 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2023-02-14 22:38:29,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 22:38:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2023-02-14 22:38:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 22:38:29,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:29,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:29,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-14 22:38:29,972 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2023-02-14 22:38:29,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:29,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896419329] [2023-02-14 22:38:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:30,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:30,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:30,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:30,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896419329] [2023-02-14 22:38:30,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896419329] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:30,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:30,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 22:38:30,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028802227] [2023-02-14 22:38:30,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:30,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 22:38:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 22:38:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:38:30,239 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:38:34,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:35,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:35,410 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2023-02-14 22:38:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 22:38:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-14 22:38:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:35,430 INFO L225 Difference]: With dead ends: 7650 [2023-02-14 22:38:35,430 INFO L226 Difference]: Without dead ends: 7607 [2023-02-14 22:38:35,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:38:35,433 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 423 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 179 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:35,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 3564 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1539 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-02-14 22:38:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2023-02-14 22:38:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2023-02-14 22:38:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2023-02-14 22:38:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2023-02-14 22:38:35,884 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2023-02-14 22:38:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:35,884 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2023-02-14 22:38:35,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 22:38:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2023-02-14 22:38:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 22:38:35,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:35,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:35,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-14 22:38:35,886 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:35,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:35,887 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2023-02-14 22:38:35,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:35,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872075205] [2023-02-14 22:38:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:36,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:36,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:38:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:38:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:36,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872075205] [2023-02-14 22:38:36,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872075205] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:36,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:36,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:38:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688513335] [2023-02-14 22:38:36,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:36,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:38:36,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:38:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:38:36,230 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:38:40,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:41,939 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2023-02-14 22:38:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:38:41,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2023-02-14 22:38:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:41,956 INFO L225 Difference]: With dead ends: 13421 [2023-02-14 22:38:41,956 INFO L226 Difference]: Without dead ends: 7857 [2023-02-14 22:38:41,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:38:41,968 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 401 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 208 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:41,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2978 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1791 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2023-02-14 22:38:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2023-02-14 22:38:42,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2023-02-14 22:38:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5807 states have (on average 1.4756328568968486) internal successors, (8569), 6017 states have internal predecessors, (8569), 749 states have call successors, (749), 230 states have call predecessors, (749), 296 states have return successors, (1233), 636 states have call predecessors, (1233), 736 states have call successors, (1233) [2023-02-14 22:38:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2023-02-14 22:38:42,428 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2023-02-14 22:38:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:42,428 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2023-02-14 22:38:42,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:38:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2023-02-14 22:38:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 22:38:42,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:42,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:42,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-14 22:38:42,430 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2023-02-14 22:38:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:42,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202790347] [2023-02-14 22:38:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:42,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:38:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 22:38:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:42,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:42,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202790347] [2023-02-14 22:38:42,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202790347] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:42,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:42,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-14 22:38:42,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268531760] [2023-02-14 22:38:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:42,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:38:42,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:38:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:38:42,847 INFO L87 Difference]: Start difference. First operand 6853 states and 10551 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:38:47,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:48,784 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2023-02-14 22:38:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 22:38:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-02-14 22:38:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:48,799 INFO L225 Difference]: With dead ends: 7755 [2023-02-14 22:38:48,800 INFO L226 Difference]: Without dead ends: 7741 [2023-02-14 22:38:48,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-02-14 22:38:48,803 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 952 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 4024 SdHoareTripleChecker+Invalid, 3431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:48,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 4024 Invalid, 3431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3004 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-02-14 22:38:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2023-02-14 22:38:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2023-02-14 22:38:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 5808 states have (on average 1.475550964187328) internal successors, (8570), 6019 states have internal predecessors, (8570), 749 states have call successors, (749), 230 states have call predecessors, (749), 297 states have return successors, (1248), 636 states have call predecessors, (1248), 736 states have call successors, (1248) [2023-02-14 22:38:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2023-02-14 22:38:49,303 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2023-02-14 22:38:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:38:49,303 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2023-02-14 22:38:49,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:38:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2023-02-14 22:38:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 22:38:49,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:38:49,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:38:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-14 22:38:49,305 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:38:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:38:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2023-02-14 22:38:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:38:49,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119648686] [2023-02-14 22:38:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:38:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:38:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:49,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:49,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:38:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:38:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:49,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:38:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:38:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:49,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:38:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:38:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:38:49,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:38:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119648686] [2023-02-14 22:38:49,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119648686] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:38:49,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:38:49,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:38:49,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411434771] [2023-02-14 22:38:49,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:38:49,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:38:49,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:38:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:38:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:38:49,547 INFO L87 Difference]: Start difference. First operand 6855 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 22:38:54,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:56,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:38:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:38:59,770 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2023-02-14 22:38:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 22:38:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2023-02-14 22:38:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:38:59,796 INFO L225 Difference]: With dead ends: 10875 [2023-02-14 22:38:59,797 INFO L226 Difference]: Without dead ends: 7624 [2023-02-14 22:38:59,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:38:59,806 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 965 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 347 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:38:59,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 2829 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1901 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2023-02-14 22:38:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2023-02-14 22:39:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2023-02-14 22:39:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5693 states have (on average 1.476725803618479) internal successors, (8407), 5908 states have internal predecessors, (8407), 738 states have call successors, (738), 227 states have call predecessors, (738), 291 states have return successors, (1189), 617 states have call predecessors, (1189), 717 states have call successors, (1189) [2023-02-14 22:39:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2023-02-14 22:39:00,299 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2023-02-14 22:39:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:00,300 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2023-02-14 22:39:00,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 22:39:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2023-02-14 22:39:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-14 22:39:00,301 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:00,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-14 22:39:00,302 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2023-02-14 22:39:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:00,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80608653] [2023-02-14 22:39:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:00,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:00,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:39:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:00,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-14 22:39:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:00,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:00,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80608653] [2023-02-14 22:39:00,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80608653] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:00,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:00,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:39:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368014043] [2023-02-14 22:39:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:00,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:39:00,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:00,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:39:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:39:00,568 INFO L87 Difference]: Start difference. First operand 6723 states and 10334 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 22:39:04,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:05,638 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2023-02-14 22:39:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:39:05,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2023-02-14 22:39:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:05,679 INFO L225 Difference]: With dead ends: 13105 [2023-02-14 22:39:05,679 INFO L226 Difference]: Without dead ends: 7568 [2023-02-14 22:39:05,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:39:05,693 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 466 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 265 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:05,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1730 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-14 22:39:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2023-02-14 22:39:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2023-02-14 22:39:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 5601 states have (on average 1.4767005891805034) internal successors, (8271), 5826 states have internal predecessors, (8271), 744 states have call successors, (744), 227 states have call predecessors, (744), 283 states have return successors, (1184), 605 states have call predecessors, (1184), 723 states have call successors, (1184) [2023-02-14 22:39:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2023-02-14 22:39:06,201 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2023-02-14 22:39:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:06,201 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2023-02-14 22:39:06,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-14 22:39:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2023-02-14 22:39:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 22:39:06,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:06,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:06,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-14 22:39:06,204 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2023-02-14 22:39:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:06,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080328979] [2023-02-14 22:39:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:06,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:06,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-14 22:39:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:06,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:06,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080328979] [2023-02-14 22:39:06,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080328979] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:06,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:06,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 22:39:06,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97437904] [2023-02-14 22:39:06,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:06,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 22:39:06,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 22:39:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:39:06,507 INFO L87 Difference]: Start difference. First operand 6629 states and 10199 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:39:11,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:13,178 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2023-02-14 22:39:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 22:39:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2023-02-14 22:39:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:13,191 INFO L225 Difference]: With dead ends: 7477 [2023-02-14 22:39:13,191 INFO L226 Difference]: Without dead ends: 7459 [2023-02-14 22:39:13,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-02-14 22:39:13,194 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 902 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 331 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:13,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 3651 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2630 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2023-02-14 22:39:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2023-02-14 22:39:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2023-02-14 22:39:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5598 states have (on average 1.476777420507324) internal successors, (8267), 5823 states have internal predecessors, (8267), 743 states have call successors, (743), 227 states have call predecessors, (743), 283 states have return successors, (1183), 604 states have call predecessors, (1183), 722 states have call successors, (1183) [2023-02-14 22:39:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2023-02-14 22:39:13,709 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2023-02-14 22:39:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:13,709 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2023-02-14 22:39:13,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:39:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2023-02-14 22:39:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 22:39:13,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:13,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:13,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-14 22:39:13,711 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2023-02-14 22:39:13,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:13,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908745864] [2023-02-14 22:39:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:13,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:13,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:13,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:39:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:13,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:39:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:13,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:13,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908745864] [2023-02-14 22:39:13,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908745864] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:13,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:13,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:39:13,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216912879] [2023-02-14 22:39:13,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:13,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:39:13,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:39:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:39:13,890 INFO L87 Difference]: Start difference. First operand 6625 states and 10193 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:17,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:18,752 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2023-02-14 22:39:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:39:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2023-02-14 22:39:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:18,771 INFO L225 Difference]: With dead ends: 10441 [2023-02-14 22:39:18,771 INFO L226 Difference]: Without dead ends: 7793 [2023-02-14 22:39:18,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:39:18,854 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 954 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 358 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:18,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1842 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1288 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-14 22:39:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2023-02-14 22:39:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2023-02-14 22:39:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 5810 states have (on average 1.4731497418244406) internal successors, (8559), 6043 states have internal predecessors, (8559), 743 states have call successors, (743), 227 states have call predecessors, (743), 293 states have return successors, (1198), 606 states have call predecessors, (1198), 722 states have call successors, (1198) [2023-02-14 22:39:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2023-02-14 22:39:19,388 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2023-02-14 22:39:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:19,389 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2023-02-14 22:39:19,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2023-02-14 22:39:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 22:39:19,392 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:19,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:19,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-14 22:39:19,392 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2023-02-14 22:39:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:19,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626957584] [2023-02-14 22:39:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:19,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:39:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-14 22:39:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:19,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-14 22:39:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:19,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:19,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626957584] [2023-02-14 22:39:19,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626957584] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:19,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:19,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:39:19,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179816953] [2023-02-14 22:39:19,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:19,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:39:19,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:19,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:39:19,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:39:19,639 INFO L87 Difference]: Start difference. First operand 6847 states and 10500 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 22:39:23,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:25,818 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2023-02-14 22:39:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 22:39:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-02-14 22:39:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:25,836 INFO L225 Difference]: With dead ends: 9490 [2023-02-14 22:39:25,836 INFO L226 Difference]: Without dead ends: 5437 [2023-02-14 22:39:25,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-02-14 22:39:25,845 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 2908 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 796 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2968 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:25,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2968 Valid, 2703 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 2165 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2023-02-14 22:39:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2023-02-14 22:39:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2023-02-14 22:39:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 3785 states have (on average 1.4544253632760897) internal successors, (5505), 3908 states have internal predecessors, (5505), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2023-02-14 22:39:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2023-02-14 22:39:26,191 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2023-02-14 22:39:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:26,192 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2023-02-14 22:39:26,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 22:39:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2023-02-14 22:39:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 22:39:26,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:26,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:26,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-14 22:39:26,193 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2023-02-14 22:39:26,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:26,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352847241] [2023-02-14 22:39:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:26,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:26,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:26,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:26,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:39:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 22:39:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:26,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:26,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352847241] [2023-02-14 22:39:26,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352847241] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:26,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:26,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:39:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452684008] [2023-02-14 22:39:26,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:39:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:39:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:39:26,451 INFO L87 Difference]: Start difference. First operand 4456 states and 6623 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:30,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:32,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:33,339 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2023-02-14 22:39:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:39:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-14 22:39:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:33,351 INFO L225 Difference]: With dead ends: 7882 [2023-02-14 22:39:33,351 INFO L226 Difference]: Without dead ends: 5395 [2023-02-14 22:39:33,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:39:33,358 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 837 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 140 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:33,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 2133 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1694 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2023-02-14 22:39:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2023-02-14 22:39:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2023-02-14 22:39:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3761 states have (on average 1.4557298590800318) internal successors, (5475), 3884 states have internal predecessors, (5475), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2023-02-14 22:39:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2023-02-14 22:39:33,753 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2023-02-14 22:39:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:33,753 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2023-02-14 22:39:33,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2023-02-14 22:39:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 22:39:33,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:33,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:33,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-14 22:39:33,758 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:33,758 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2023-02-14 22:39:33,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:33,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727582397] [2023-02-14 22:39:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:33,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:33,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:33,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:33,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:39:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-14 22:39:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:33,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-14 22:39:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-14 22:39:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:33,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727582397] [2023-02-14 22:39:33,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727582397] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:33,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:33,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:39:33,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064308042] [2023-02-14 22:39:33,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:33,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:39:33,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:33,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:39:33,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:39:33,946 INFO L87 Difference]: Start difference. First operand 4432 states and 6593 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 22:39:37,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:38,469 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2023-02-14 22:39:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 22:39:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2023-02-14 22:39:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:38,481 INFO L225 Difference]: With dead ends: 7928 [2023-02-14 22:39:38,481 INFO L226 Difference]: Without dead ends: 5377 [2023-02-14 22:39:38,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-14 22:39:38,487 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1469 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 539 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:38,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 2092 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1394 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-02-14 22:39:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2023-02-14 22:39:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2023-02-14 22:39:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3755 states have (on average 1.4561917443408787) internal successors, (5468), 3877 states have internal predecessors, (5468), 464 states have call successors, (464), 161 states have call predecessors, (464), 203 states have return successors, (638), 399 states have call predecessors, (638), 447 states have call successors, (638) [2023-02-14 22:39:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2023-02-14 22:39:38,901 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2023-02-14 22:39:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:38,902 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2023-02-14 22:39:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 22:39:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2023-02-14 22:39:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 22:39:38,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:38,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:38,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-14 22:39:38,903 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2023-02-14 22:39:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609121092] [2023-02-14 22:39:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:39,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:39,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:39,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-14 22:39:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:39,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-14 22:39:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:39,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:39,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609121092] [2023-02-14 22:39:39,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609121092] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:39,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:39,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:39:39,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585303827] [2023-02-14 22:39:39,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:39,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:39:39,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:39:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:39:39,258 INFO L87 Difference]: Start difference. First operand 4423 states and 6570 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:43,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:45,083 INFO L93 Difference]: Finished difference Result 5300 states and 8024 transitions. [2023-02-14 22:39:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:39:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-14 22:39:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:45,092 INFO L225 Difference]: With dead ends: 5300 [2023-02-14 22:39:45,092 INFO L226 Difference]: Without dead ends: 5280 [2023-02-14 22:39:45,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:39:45,098 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 993 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 419 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:45,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 2870 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1818 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-02-14 22:39:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2023-02-14 22:39:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4422. [2023-02-14 22:39:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 3755 states have (on average 1.455925432756325) internal successors, (5467), 3876 states have internal predecessors, (5467), 463 states have call successors, (463), 161 states have call predecessors, (463), 203 states have return successors, (637), 399 states have call predecessors, (637), 446 states have call successors, (637) [2023-02-14 22:39:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6567 transitions. [2023-02-14 22:39:45,448 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6567 transitions. Word has length 68 [2023-02-14 22:39:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:45,448 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 6567 transitions. [2023-02-14 22:39:45,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6567 transitions. [2023-02-14 22:39:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 22:39:45,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:45,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:45,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-14 22:39:45,451 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:45,451 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2023-02-14 22:39:45,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:45,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96659899] [2023-02-14 22:39:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:45,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:45,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:39:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:45,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 22:39:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:45,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:45,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96659899] [2023-02-14 22:39:45,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96659899] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:45,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:45,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 22:39:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081951690] [2023-02-14 22:39:45,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:45,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 22:39:45,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 22:39:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:39:45,863 INFO L87 Difference]: Start difference. First operand 4422 states and 6567 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:50,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:51,433 INFO L93 Difference]: Finished difference Result 5362 states and 8158 transitions. [2023-02-14 22:39:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 22:39:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2023-02-14 22:39:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:51,445 INFO L225 Difference]: With dead ends: 5362 [2023-02-14 22:39:51,446 INFO L226 Difference]: Without dead ends: 5346 [2023-02-14 22:39:51,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-14 22:39:51,449 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 998 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 427 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:51,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 3289 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 2228 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-02-14 22:39:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2023-02-14 22:39:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4427. [2023-02-14 22:39:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 3758 states have (on average 1.456093666844066) internal successors, (5472), 3880 states have internal predecessors, (5472), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-14 22:39:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6576 transitions. [2023-02-14 22:39:51,831 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6576 transitions. Word has length 69 [2023-02-14 22:39:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:51,831 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6576 transitions. [2023-02-14 22:39:51,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 22:39:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6576 transitions. [2023-02-14 22:39:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 22:39:51,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:51,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:51,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-14 22:39:51,833 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2023-02-14 22:39:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:51,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635432984] [2023-02-14 22:39:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:51,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:52,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:52,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:52,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:39:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:52,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:39:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:52,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:52,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635432984] [2023-02-14 22:39:52,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635432984] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:52,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:52,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 22:39:52,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713138434] [2023-02-14 22:39:52,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:52,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 22:39:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 22:39:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:39:52,195 INFO L87 Difference]: Start difference. First operand 4427 states and 6576 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:39:55,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:57,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:39:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:39:59,022 INFO L93 Difference]: Finished difference Result 9525 states and 14480 transitions. [2023-02-14 22:39:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:39:59,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-02-14 22:39:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:39:59,035 INFO L225 Difference]: With dead ends: 9525 [2023-02-14 22:39:59,036 INFO L226 Difference]: Without dead ends: 5473 [2023-02-14 22:39:59,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:39:59,045 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 405 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 94 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:39:59,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2523 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1453 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-02-14 22:39:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2023-02-14 22:39:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4455. [2023-02-14 22:39:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 3786 states have (on average 1.4527205493924986) internal successors, (5500), 3908 states have internal predecessors, (5500), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-14 22:39:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 6604 transitions. [2023-02-14 22:39:59,483 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 6604 transitions. Word has length 69 [2023-02-14 22:39:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:39:59,483 INFO L495 AbstractCegarLoop]: Abstraction has 4455 states and 6604 transitions. [2023-02-14 22:39:59,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:39:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 6604 transitions. [2023-02-14 22:39:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 22:39:59,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:39:59,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:39:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-14 22:39:59,485 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:39:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:39:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2023-02-14 22:39:59,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:39:59,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202075556] [2023-02-14 22:39:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:39:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:39:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:39:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:59,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:39:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:39:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:39:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:39:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:39:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:39:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202075556] [2023-02-14 22:39:59,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202075556] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:39:59,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:39:59,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 22:39:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632776410] [2023-02-14 22:39:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:39:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 22:39:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:39:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 22:39:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:39:59,863 INFO L87 Difference]: Start difference. First operand 4455 states and 6604 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:40:03,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:40:04,724 INFO L93 Difference]: Finished difference Result 9445 states and 14286 transitions. [2023-02-14 22:40:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:40:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-02-14 22:40:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:40:04,733 INFO L225 Difference]: With dead ends: 9445 [2023-02-14 22:40:04,734 INFO L226 Difference]: Without dead ends: 5384 [2023-02-14 22:40:04,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:40:04,740 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 570 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 366 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:40:04,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 3151 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1678 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-14 22:40:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2023-02-14 22:40:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4434. [2023-02-14 22:40:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 3772 states have (on average 1.4544008483563096) internal successors, (5486), 3894 states have internal predecessors, (5486), 465 states have call successors, (465), 161 states have call predecessors, (465), 196 states have return successors, (594), 393 states have call predecessors, (594), 448 states have call successors, (594) [2023-02-14 22:40:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6545 transitions. [2023-02-14 22:40:05,164 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6545 transitions. Word has length 69 [2023-02-14 22:40:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:40:05,164 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6545 transitions. [2023-02-14 22:40:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:40:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6545 transitions. [2023-02-14 22:40:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 22:40:05,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:40:05,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:40:05,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-14 22:40:05,166 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:40:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:40:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2023-02-14 22:40:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:40:05,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657822336] [2023-02-14 22:40:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:40:05,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:40:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:40:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:05,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:40:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:40:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:05,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:40:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:05,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:40:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:40:05,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:40:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657822336] [2023-02-14 22:40:05,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657822336] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:40:05,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:40:05,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-14 22:40:05,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604531302] [2023-02-14 22:40:05,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:40:05,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:40:05,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:40:05,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:40:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:40:05,596 INFO L87 Difference]: Start difference. First operand 4434 states and 6545 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 22:40:11,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:13,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:40:15,311 INFO L93 Difference]: Finished difference Result 8059 states and 12189 transitions. [2023-02-14 22:40:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 22:40:15,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-02-14 22:40:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:40:15,323 INFO L225 Difference]: With dead ends: 8059 [2023-02-14 22:40:15,324 INFO L226 Difference]: Without dead ends: 5579 [2023-02-14 22:40:15,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-02-14 22:40:15,330 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 863 mSDsluCounter, 3644 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 244 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 3415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:40:15,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 4171 Invalid, 3415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3169 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2023-02-14 22:40:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2023-02-14 22:40:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 4492. [2023-02-14 22:40:15,799 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) [2023-02-14 22:40:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 6634 transitions. [2023-02-14 22:40:15,809 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 6634 transitions. Word has length 71 [2023-02-14 22:40:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:40:15,809 INFO L495 AbstractCegarLoop]: Abstraction has 4492 states and 6634 transitions. [2023-02-14 22:40:15,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 22:40:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 6634 transitions. [2023-02-14 22:40:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 22:40:15,811 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:40:15,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:40:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-14 22:40:15,811 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:40:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:40:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2023-02-14 22:40:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:40:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879513844] [2023-02-14 22:40:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:40:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:40:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:15,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:40:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:40:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:16,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:40:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:16,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:40:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:40:16,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:40:16,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879513844] [2023-02-14 22:40:16,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879513844] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:40:16,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:40:16,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:40:16,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027705674] [2023-02-14 22:40:16,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:40:16,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:40:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:40:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:40:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:40:16,132 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) [2023-02-14 22:40:20,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:22,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:40:23,724 INFO L93 Difference]: Finished difference Result 9698 states and 14628 transitions. [2023-02-14 22:40:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:40:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2023-02-14 22:40:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:40:23,735 INFO L225 Difference]: With dead ends: 9698 [2023-02-14 22:40:23,735 INFO L226 Difference]: Without dead ends: 5600 [2023-02-14 22:40:23,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:40:23,742 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 413 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 125 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-02-14 22:40:23,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 2859 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1794 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2023-02-14 22:40:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2023-02-14 22:40:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 4504. [2023-02-14 22:40:24,133 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) [2023-02-14 22:40:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6646 transitions. [2023-02-14 22:40:24,142 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6646 transitions. Word has length 70 [2023-02-14 22:40:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:40:24,143 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 6646 transitions. [2023-02-14 22:40:24,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 22:40:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6646 transitions. [2023-02-14 22:40:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 22:40:24,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:40:24,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:40:24,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-14 22:40:24,156 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:40:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:40:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 965591191, now seen corresponding path program 1 times [2023-02-14 22:40:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:40:24,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979317070] [2023-02-14 22:40:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:40:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:40:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:24,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:40:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:24,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:40:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:24,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-14 22:40:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:40:24,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:40:24,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979317070] [2023-02-14 22:40:24,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979317070] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:40:24,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:40:24,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-14 22:40:24,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647929283] [2023-02-14 22:40:24,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:40:24,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 22:40:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:40:24,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 22:40:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:40:24,483 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) [2023-02-14 22:40:29,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-14 22:40:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:40:30,792 INFO L93 Difference]: Finished difference Result 5384 states and 8102 transitions. [2023-02-14 22:40:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 22:40:30,792 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 [2023-02-14 22:40:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:40:30,803 INFO L225 Difference]: With dead ends: 5384 [2023-02-14 22:40:30,803 INFO L226 Difference]: Without dead ends: 5362 [2023-02-14 22:40:30,805 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 [2023-02-14 22:40:30,806 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 911 mSDsluCounter, 3519 mSDsCounter, 0 mSdLazyCounter, 2954 mSolverCounterSat, 324 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 4046 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2954 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-02-14 22:40:30,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 4046 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2954 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2023-02-14 22:40:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2023-02-14 22:40:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4499. [2023-02-14 22:40:31,238 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) [2023-02-14 22:40:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 6639 transitions. [2023-02-14 22:40:31,248 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 6639 transitions. Word has length 69 [2023-02-14 22:40:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:40:31,248 INFO L495 AbstractCegarLoop]: Abstraction has 4499 states and 6639 transitions. [2023-02-14 22:40:31,248 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) [2023-02-14 22:40:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 6639 transitions. [2023-02-14 22:40:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 22:40:31,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:40:31,250 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] [2023-02-14 22:40:31,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-14 22:40:31,250 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:40:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:40:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2005419428, now seen corresponding path program 1 times [2023-02-14 22:40:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:40:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109274932] [2023-02-14 22:40:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:40:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:40:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:40:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:40:31,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:40:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat