./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.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 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:29:23,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:29:23,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:29:23,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:29:23,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:29:23,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:29:23,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:29:23,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:29:23,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:29:23,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:29:23,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:29:23,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:29:23,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:29:23,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:29:23,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:29:23,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:29:23,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:29:23,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:29:23,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:29:23,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:29:23,310 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:29:23,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:29:23,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:29:23,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:29:23,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:29:23,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:29:23,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:29:23,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:29:23,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:29:23,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:29:23,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:29:23,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:29:23,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:29:23,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:29:23,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:29:23,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:29:23,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:29:23,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:29:23,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:29:23,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:29:23,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:29:23,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:29:23,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:29:23,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:29:23,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:29:23,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:29:23,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:29:23,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:29:23,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:29:23,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:29:23,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:29:23,351 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:29:23,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:29:23,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:29:23,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:29:23,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:29:23,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:29:23,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:29:23,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:29:23,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:29:23,353 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:29:23,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:29:23,353 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:29:23,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:29:23,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:29:23,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:29:23,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:29:23,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:29:23,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:29:23,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:29:23,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:29:23,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:29:23,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:29:23,355 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:29:23,355 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:29:23,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:29:23,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe [2022-07-13 11:29:23,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:29:23,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:29:23,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:29:23,555 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:29:23,555 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:29:23,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-07-13 11:29:23,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9425e381e/5e32845be44d45b8a6420b880b5b14ca/FLAG2fdf8a457 [2022-07-13 11:29:24,015 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:29:24,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-07-13 11:29:24,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9425e381e/5e32845be44d45b8a6420b880b5b14ca/FLAG2fdf8a457 [2022-07-13 11:29:24,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9425e381e/5e32845be44d45b8a6420b880b5b14ca [2022-07-13 11:29:24,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:29:24,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:29:24,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:29:24,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:29:24,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:29:24,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4f5eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24, skipping insertion in model container [2022-07-13 11:29:24,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:29:24,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:29:24,565 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-07-13 11:29:24,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:29:24,725 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:29:24,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-07-13 11:29:24,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:29:24,806 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:29:24,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24 WrapperNode [2022-07-13 11:29:24,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:29:24,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:29:24,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:29:24,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:29:24,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,899 INFO L137 Inliner]: procedures = 41, calls = 107, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 1581 [2022-07-13 11:29:24,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:29:24,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:29:24,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:29:24,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:29:24,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:29:24,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:29:24,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:29:24,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:29:24,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (1/1) ... [2022-07-13 11:29:24,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:29:24,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:29:24,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 11:29:25,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 11:29:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-07-13 11:29:25,032 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-07-13 11:29:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:29:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-07-13 11:29:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-07-13 11:29:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-13 11:29:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-13 11:29:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-07-13 11:29:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-07-13 11:29:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-13 11:29:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-13 11:29:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-13 11:29:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-13 11:29:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-07-13 11:29:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-07-13 11:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-07-13 11:29:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-07-13 11:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-07-13 11:29:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-07-13 11:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-13 11:29:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-13 11:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-13 11:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-13 11:29:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-07-13 11:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-07-13 11:29:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:29:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-07-13 11:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-07-13 11:29:25,242 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:29:25,243 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:29:25,357 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,406 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-07-13 11:29:25,406 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-07-13 11:29:25,456 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,474 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-13 11:29:25,474 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-13 11:29:25,479 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,480 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,484 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,488 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,497 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,499 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,501 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:29:25,877 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: CdAudioPnp_#res#1 := 0; [2022-07-13 11:29:25,877 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume !false; [2022-07-13 11:29:25,878 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##257: assume false; [2022-07-13 11:29:25,878 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##286: assume !false; [2022-07-13 11:29:25,878 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##285: assume false; [2022-07-13 11:29:25,878 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2022-07-13 11:29:25,878 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2022-07-13 11:29:25,878 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##133: assume false; [2022-07-13 11:29:25,878 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##134: assume !false; [2022-07-13 11:29:25,879 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2022-07-13 11:29:25,879 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2022-07-13 11:29:25,879 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-07-13 11:29:25,880 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-07-13 11:29:25,880 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##331: assume false; [2022-07-13 11:29:25,880 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##332: assume !false; [2022-07-13 11:29:25,909 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:29:25,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:29:25,929 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:29:25,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:29:25 BoogieIcfgContainer [2022-07-13 11:29:25,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:29:25,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:29:25,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:29:25,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:29:25,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:29:24" (1/3) ... [2022-07-13 11:29:25,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1bbed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:29:25, skipping insertion in model container [2022-07-13 11:29:25,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:29:24" (2/3) ... [2022-07-13 11:29:25,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1bbed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:29:25, skipping insertion in model container [2022-07-13 11:29:25,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:29:25" (3/3) ... [2022-07-13 11:29:25,942 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-07-13 11:29:25,951 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:29:25,952 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:29:25,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:29:25,993 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a5c305, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@dbe8f1b [2022-07-13 11:29:25,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:29:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-13 11:29:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 11:29:26,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:26,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:26,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:26,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1469618272, now seen corresponding path program 1 times [2022-07-13 11:29:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:26,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817056883] [2022-07-13 11:29:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:26,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:26,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:26,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817056883] [2022-07-13 11:29:26,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817056883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:26,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:26,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:29:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761632664] [2022-07-13 11:29:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:26,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:26,154 INFO L87 Difference]: Start difference. First operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:26,333 INFO L93 Difference]: Finished difference Result 809 states and 1294 transitions. [2022-07-13 11:29:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 11:29:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:26,352 INFO L225 Difference]: With dead ends: 809 [2022-07-13 11:29:26,353 INFO L226 Difference]: Without dead ends: 461 [2022-07-13 11:29:26,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:26,359 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 8 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:26,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1351 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-07-13 11:29:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-07-13 11:29:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 362 states have (on average 1.4751381215469612) internal successors, (534), 378 states have internal predecessors, (534), 86 states have call successors, (86), 13 states have call predecessors, (86), 12 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-07-13 11:29:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 691 transitions. [2022-07-13 11:29:26,481 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 691 transitions. Word has length 13 [2022-07-13 11:29:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:26,481 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 691 transitions. [2022-07-13 11:29:26,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 691 transitions. [2022-07-13 11:29:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 11:29:26,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:26,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:26,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:29:26,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1712840026, now seen corresponding path program 1 times [2022-07-13 11:29:26,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:26,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849509091] [2022-07-13 11:29:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:26,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:26,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849509091] [2022-07-13 11:29:26,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849509091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:26,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:26,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:29:26,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883835243] [2022-07-13 11:29:26,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:26,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:26,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:26,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:26,531 INFO L87 Difference]: Start difference. First operand 461 states and 691 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:26,705 INFO L93 Difference]: Finished difference Result 702 states and 1030 transitions. [2022-07-13 11:29:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:26,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-13 11:29:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:26,710 INFO L225 Difference]: With dead ends: 702 [2022-07-13 11:29:26,710 INFO L226 Difference]: Without dead ends: 597 [2022-07-13 11:29:26,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:26,712 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 566 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:26,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1046 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-13 11:29:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 579. [2022-07-13 11:29:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 466 states have (on average 1.4356223175965666) internal successors, (669), 468 states have internal predecessors, (669), 92 states have call successors, (92), 21 states have call predecessors, (92), 20 states have return successors, (97), 91 states have call predecessors, (97), 81 states have call successors, (97) [2022-07-13 11:29:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 858 transitions. [2022-07-13 11:29:26,736 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 858 transitions. Word has length 15 [2022-07-13 11:29:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:26,737 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 858 transitions. [2022-07-13 11:29:26,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 858 transitions. [2022-07-13 11:29:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 11:29:26,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:26,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:26,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:29:26,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1723202730, now seen corresponding path program 1 times [2022-07-13 11:29:26,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:26,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882523326] [2022-07-13 11:29:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:26,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:26,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:26,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882523326] [2022-07-13 11:29:26,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882523326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:26,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:26,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:29:26,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836445536] [2022-07-13 11:29:26,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:26,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:26,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:26,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:26,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:26,812 INFO L87 Difference]: Start difference. First operand 579 states and 858 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:26,873 INFO L93 Difference]: Finished difference Result 858 states and 1241 transitions. [2022-07-13 11:29:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 11:29:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:26,881 INFO L225 Difference]: With dead ends: 858 [2022-07-13 11:29:26,895 INFO L226 Difference]: Without dead ends: 723 [2022-07-13 11:29:26,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:26,897 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 605 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:26,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 853 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-07-13 11:29:26,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 687. [2022-07-13 11:29:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 564 states have (on average 1.4326241134751774) internal successors, (808), 562 states have internal predecessors, (808), 93 states have call successors, (93), 26 states have call predecessors, (93), 29 states have return successors, (110), 98 states have call predecessors, (110), 85 states have call successors, (110) [2022-07-13 11:29:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1011 transitions. [2022-07-13 11:29:26,924 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1011 transitions. Word has length 19 [2022-07-13 11:29:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:26,924 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1011 transitions. [2022-07-13 11:29:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1011 transitions. [2022-07-13 11:29:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 11:29:26,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:26,926 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] [2022-07-13 11:29:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:29:26,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash 981092466, now seen corresponding path program 1 times [2022-07-13 11:29:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605867734] [2022-07-13 11:29:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:26,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:26,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605867734] [2022-07-13 11:29:26,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605867734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:26,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:26,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:29:26,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618656244] [2022-07-13 11:29:26,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:26,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:26,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:26,972 INFO L87 Difference]: Start difference. First operand 687 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:27,117 INFO L93 Difference]: Finished difference Result 1290 states and 1958 transitions. [2022-07-13 11:29:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 11:29:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:27,127 INFO L225 Difference]: With dead ends: 1290 [2022-07-13 11:29:27,128 INFO L226 Difference]: Without dead ends: 1057 [2022-07-13 11:29:27,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:27,139 INFO L413 NwaCegarLoop]: 1006 mSDtfsCounter, 338 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:27,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1622 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-07-13 11:29:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 819. [2022-07-13 11:29:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 673 states have (on average 1.4338781575037147) internal successors, (965), 670 states have internal predecessors, (965), 106 states have call successors, (106), 34 states have call predecessors, (106), 39 states have return successors, (172), 114 states have call predecessors, (172), 98 states have call successors, (172) [2022-07-13 11:29:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1243 transitions. [2022-07-13 11:29:27,189 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1243 transitions. Word has length 21 [2022-07-13 11:29:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:27,189 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1243 transitions. [2022-07-13 11:29:27,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1243 transitions. [2022-07-13 11:29:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 11:29:27,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:27,200 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] [2022-07-13 11:29:27,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:29:27,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 110549048, now seen corresponding path program 1 times [2022-07-13 11:29:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:27,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657027056] [2022-07-13 11:29:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657027056] [2022-07-13 11:29:27,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657027056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:27,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:27,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147161685] [2022-07-13 11:29:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:27,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:27,306 INFO L87 Difference]: Start difference. First operand 819 states and 1243 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:27,606 INFO L93 Difference]: Finished difference Result 1372 states and 2088 transitions. [2022-07-13 11:29:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:29:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 11:29:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:27,610 INFO L225 Difference]: With dead ends: 1372 [2022-07-13 11:29:27,610 INFO L226 Difference]: Without dead ends: 829 [2022-07-13 11:29:27,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:27,615 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 1027 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:27,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 869 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-13 11:29:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 807. [2022-07-13 11:29:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 663 states have (on average 1.4283559577677225) internal successors, (947), 660 states have internal predecessors, (947), 104 states have call successors, (104), 32 states have call predecessors, (104), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2022-07-13 11:29:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1219 transitions. [2022-07-13 11:29:27,647 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1219 transitions. Word has length 22 [2022-07-13 11:29:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:27,648 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1219 transitions. [2022-07-13 11:29:27,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1219 transitions. [2022-07-13 11:29:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 11:29:27,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:27,651 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] [2022-07-13 11:29:27,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:29:27,651 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash -401986644, now seen corresponding path program 1 times [2022-07-13 11:29:27,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:27,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767078809] [2022-07-13 11:29:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:27,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:27,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:27,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767078809] [2022-07-13 11:29:27,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767078809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:27,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:27,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:29:27,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939812276] [2022-07-13 11:29:27,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:27,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:27,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:27,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:27,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:27,705 INFO L87 Difference]: Start difference. First operand 807 states and 1219 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:27,769 INFO L93 Difference]: Finished difference Result 810 states and 1221 transitions. [2022-07-13 11:29:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 11:29:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:27,772 INFO L225 Difference]: With dead ends: 810 [2022-07-13 11:29:27,772 INFO L226 Difference]: Without dead ends: 806 [2022-07-13 11:29:27,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:27,774 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 22 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:27,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1252 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-07-13 11:29:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-07-13 11:29:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 663 states have (on average 1.4253393665158371) internal successors, (945), 659 states have internal predecessors, (945), 103 states have call successors, (103), 32 states have call predecessors, (103), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2022-07-13 11:29:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1216 transitions. [2022-07-13 11:29:27,801 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1216 transitions. Word has length 23 [2022-07-13 11:29:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:27,802 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1216 transitions. [2022-07-13 11:29:27,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1216 transitions. [2022-07-13 11:29:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 11:29:27,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:27,803 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] [2022-07-13 11:29:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:29:27,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1420935661, now seen corresponding path program 1 times [2022-07-13 11:29:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:27,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120200463] [2022-07-13 11:29:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:27,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120200463] [2022-07-13 11:29:27,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120200463] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:27,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:27,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:27,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335705035] [2022-07-13 11:29:27,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:27,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:27,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:27,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:27,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:27,836 INFO L87 Difference]: Start difference. First operand 806 states and 1216 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:27,914 INFO L93 Difference]: Finished difference Result 1220 states and 1776 transitions. [2022-07-13 11:29:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:29:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-13 11:29:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:27,917 INFO L225 Difference]: With dead ends: 1220 [2022-07-13 11:29:27,918 INFO L226 Difference]: Without dead ends: 806 [2022-07-13 11:29:27,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:27,919 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 318 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:27,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1941 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-07-13 11:29:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 681. [2022-07-13 11:29:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 559 states have (on average 1.407871198568873) internal successors, (787), 557 states have internal predecessors, (787), 88 states have call successors, (88), 28 states have call predecessors, (88), 33 states have return successors, (109), 95 states have call predecessors, (109), 81 states have call successors, (109) [2022-07-13 11:29:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 984 transitions. [2022-07-13 11:29:27,940 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 984 transitions. Word has length 28 [2022-07-13 11:29:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:27,940 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 984 transitions. [2022-07-13 11:29:27,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 984 transitions. [2022-07-13 11:29:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 11:29:27,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:27,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:27,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:29:27,942 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1565251403, now seen corresponding path program 1 times [2022-07-13 11:29:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:27,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644397246] [2022-07-13 11:29:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:27,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644397246] [2022-07-13 11:29:27,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644397246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:27,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:27,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:29:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138047829] [2022-07-13 11:29:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:27,967 INFO L87 Difference]: Start difference. First operand 681 states and 984 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:28,002 INFO L93 Difference]: Finished difference Result 764 states and 1091 transitions. [2022-07-13 11:29:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 11:29:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:28,005 INFO L225 Difference]: With dead ends: 764 [2022-07-13 11:29:28,005 INFO L226 Difference]: Without dead ends: 746 [2022-07-13 11:29:28,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:28,006 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 628 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:28,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 716 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-07-13 11:29:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 703. [2022-07-13 11:29:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 579 states have (on average 1.4162348877374784) internal successors, (820), 584 states have internal predecessors, (820), 88 states have call successors, (88), 29 states have call predecessors, (88), 35 states have return successors, (104), 89 states have call predecessors, (104), 82 states have call successors, (104) [2022-07-13 11:29:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1012 transitions. [2022-07-13 11:29:28,028 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1012 transitions. Word has length 29 [2022-07-13 11:29:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:28,028 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 1012 transitions. [2022-07-13 11:29:28,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1012 transitions. [2022-07-13 11:29:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 11:29:28,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:28,030 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] [2022-07-13 11:29:28,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:29:28,031 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash 18714975, now seen corresponding path program 1 times [2022-07-13 11:29:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:28,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154982088] [2022-07-13 11:29:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:28,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:28,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 11:29:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:28,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154982088] [2022-07-13 11:29:28,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154982088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:28,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:28,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172967735] [2022-07-13 11:29:28,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:28,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:28,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:28,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:28,058 INFO L87 Difference]: Start difference. First operand 703 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:28,234 INFO L93 Difference]: Finished difference Result 999 states and 1443 transitions. [2022-07-13 11:29:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:29:28,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-07-13 11:29:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:28,237 INFO L225 Difference]: With dead ends: 999 [2022-07-13 11:29:28,238 INFO L226 Difference]: Without dead ends: 772 [2022-07-13 11:29:28,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:28,239 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 254 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:28,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1774 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-07-13 11:29:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 686. [2022-07-13 11:29:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4113475177304964) internal successors, (796), 571 states have internal predecessors, (796), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2022-07-13 11:29:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 983 transitions. [2022-07-13 11:29:28,262 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 983 transitions. Word has length 35 [2022-07-13 11:29:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:28,262 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 983 transitions. [2022-07-13 11:29:28,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 983 transitions. [2022-07-13 11:29:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 11:29:28,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:28,264 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] [2022-07-13 11:29:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:29:28,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1008894227, now seen corresponding path program 1 times [2022-07-13 11:29:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:28,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667129809] [2022-07-13 11:29:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:28,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667129809] [2022-07-13 11:29:28,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667129809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:28,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:28,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912310940] [2022-07-13 11:29:28,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:28,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:28,295 INFO L87 Difference]: Start difference. First operand 686 states and 983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:28,485 INFO L93 Difference]: Finished difference Result 744 states and 1056 transitions. [2022-07-13 11:29:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:29:28,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-13 11:29:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:28,488 INFO L225 Difference]: With dead ends: 744 [2022-07-13 11:29:28,489 INFO L226 Difference]: Without dead ends: 702 [2022-07-13 11:29:28,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:28,490 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 691 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:28,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1101 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-07-13 11:29:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 686. [2022-07-13 11:29:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4078014184397163) internal successors, (794), 571 states have internal predecessors, (794), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2022-07-13 11:29:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 981 transitions. [2022-07-13 11:29:28,513 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 981 transitions. Word has length 32 [2022-07-13 11:29:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:28,513 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 981 transitions. [2022-07-13 11:29:28,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 981 transitions. [2022-07-13 11:29:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 11:29:28,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:28,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:28,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:29:28,515 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1838861437, now seen corresponding path program 1 times [2022-07-13 11:29:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906942488] [2022-07-13 11:29:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:28,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:28,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:29:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:28,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:28,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906942488] [2022-07-13 11:29:28,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906942488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:28,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:28,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:28,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880151425] [2022-07-13 11:29:28,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:28,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:28,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:28,538 INFO L87 Difference]: Start difference. First operand 686 states and 981 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:28,714 INFO L93 Difference]: Finished difference Result 771 states and 1109 transitions. [2022-07-13 11:29:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:29:28,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-07-13 11:29:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:28,717 INFO L225 Difference]: With dead ends: 771 [2022-07-13 11:29:28,717 INFO L226 Difference]: Without dead ends: 711 [2022-07-13 11:29:28,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:28,718 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 703 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:28,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1254 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-07-13 11:29:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 675. [2022-07-13 11:29:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 557 states have (on average 1.4093357271095153) internal successors, (785), 564 states have internal predecessors, (785), 85 states have call successors, (85), 26 states have call predecessors, (85), 32 states have return successors, (98), 84 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-13 11:29:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 968 transitions. [2022-07-13 11:29:28,744 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 968 transitions. Word has length 36 [2022-07-13 11:29:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:28,744 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 968 transitions. [2022-07-13 11:29:28,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 968 transitions. [2022-07-13 11:29:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 11:29:28,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:28,746 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] [2022-07-13 11:29:28,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:29:28,746 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:28,747 INFO L85 PathProgramCache]: Analyzing trace with hash 138801832, now seen corresponding path program 1 times [2022-07-13 11:29:28,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:28,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910439805] [2022-07-13 11:29:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:28,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:28,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:28,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910439805] [2022-07-13 11:29:28,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910439805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:28,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:28,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:29:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271374459] [2022-07-13 11:29:28,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:28,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:28,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:28,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:28,769 INFO L87 Difference]: Start difference. First operand 675 states and 968 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:28,833 INFO L93 Difference]: Finished difference Result 832 states and 1184 transitions. [2022-07-13 11:29:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-13 11:29:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:28,836 INFO L225 Difference]: With dead ends: 832 [2022-07-13 11:29:28,837 INFO L226 Difference]: Without dead ends: 821 [2022-07-13 11:29:28,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:29:28,837 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 132 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:28,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1374 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-07-13 11:29:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 723. [2022-07-13 11:29:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 601 states have (on average 1.3860232945091515) internal successors, (833), 601 states have internal predecessors, (833), 85 states have call successors, (85), 26 states have call predecessors, (85), 36 states have return successors, (109), 95 states have call predecessors, (109), 79 states have call successors, (109) [2022-07-13 11:29:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1027 transitions. [2022-07-13 11:29:28,864 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1027 transitions. Word has length 34 [2022-07-13 11:29:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:28,864 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 1027 transitions. [2022-07-13 11:29:28,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1027 transitions. [2022-07-13 11:29:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 11:29:28,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:28,866 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] [2022-07-13 11:29:28,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:29:28,866 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -298326298, now seen corresponding path program 1 times [2022-07-13 11:29:28,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:28,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058947141] [2022-07-13 11:29:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:28,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:28,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058947141] [2022-07-13 11:29:28,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058947141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:28,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:28,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:28,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502001534] [2022-07-13 11:29:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:28,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:28,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:28,898 INFO L87 Difference]: Start difference. First operand 723 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:29,097 INFO L93 Difference]: Finished difference Result 751 states and 1058 transitions. [2022-07-13 11:29:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:29:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-13 11:29:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:29,100 INFO L225 Difference]: With dead ends: 751 [2022-07-13 11:29:29,100 INFO L226 Difference]: Without dead ends: 704 [2022-07-13 11:29:29,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:29,101 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 671 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:29,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1100 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:29,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-07-13 11:29:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 694. [2022-07-13 11:29:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 575 states have (on average 1.391304347826087) internal successors, (800), 581 states have internal predecessors, (800), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-13 11:29:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 983 transitions. [2022-07-13 11:29:29,126 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 983 transitions. Word has length 34 [2022-07-13 11:29:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:29,126 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 983 transitions. [2022-07-13 11:29:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 983 transitions. [2022-07-13 11:29:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 11:29:29,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:29,128 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] [2022-07-13 11:29:29,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:29:29,128 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 452395434, now seen corresponding path program 1 times [2022-07-13 11:29:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:29,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432762623] [2022-07-13 11:29:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:29,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:29,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432762623] [2022-07-13 11:29:29,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432762623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:29,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:29,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:29,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382498911] [2022-07-13 11:29:29,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:29,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:29,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:29,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:29,166 INFO L87 Difference]: Start difference. First operand 694 states and 983 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:29,433 INFO L93 Difference]: Finished difference Result 792 states and 1125 transitions. [2022-07-13 11:29:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:29:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 11:29:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:29,436 INFO L225 Difference]: With dead ends: 792 [2022-07-13 11:29:29,436 INFO L226 Difference]: Without dead ends: 788 [2022-07-13 11:29:29,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:29,437 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 752 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:29,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1179 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-07-13 11:29:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 696. [2022-07-13 11:29:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 577 states have (on average 1.389948006932409) internal successors, (802), 583 states have internal predecessors, (802), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-13 11:29:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 985 transitions. [2022-07-13 11:29:29,468 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 985 transitions. Word has length 35 [2022-07-13 11:29:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:29,468 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 985 transitions. [2022-07-13 11:29:29,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 985 transitions. [2022-07-13 11:29:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 11:29:29,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:29,469 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] [2022-07-13 11:29:29,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:29:29,470 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:29,470 INFO L85 PathProgramCache]: Analyzing trace with hash 452672264, now seen corresponding path program 1 times [2022-07-13 11:29:29,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:29,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156305674] [2022-07-13 11:29:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:29,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:29,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156305674] [2022-07-13 11:29:29,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156305674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:29,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:29,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:29:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519012226] [2022-07-13 11:29:29,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:29,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:29:29,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:29:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:29:29,497 INFO L87 Difference]: Start difference. First operand 696 states and 985 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:29,572 INFO L93 Difference]: Finished difference Result 709 states and 998 transitions. [2022-07-13 11:29:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:29:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 11:29:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:29,575 INFO L225 Difference]: With dead ends: 709 [2022-07-13 11:29:29,575 INFO L226 Difference]: Without dead ends: 679 [2022-07-13 11:29:29,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:29,576 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 38 mSDsluCounter, 2545 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:29,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3193 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-07-13 11:29:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2022-07-13 11:29:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 560 states have (on average 1.3964285714285714) internal successors, (782), 566 states have internal predecessors, (782), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-13 11:29:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 965 transitions. [2022-07-13 11:29:29,604 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 965 transitions. Word has length 35 [2022-07-13 11:29:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:29,604 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 965 transitions. [2022-07-13 11:29:29,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:29:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 965 transitions. [2022-07-13 11:29:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 11:29:29,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:29,605 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] [2022-07-13 11:29:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:29:29,606 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1733603893, now seen corresponding path program 1 times [2022-07-13 11:29:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:29,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182739669] [2022-07-13 11:29:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:29,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 11:29:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:29,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182739669] [2022-07-13 11:29:29,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182739669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:29,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:29,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:29:29,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854385808] [2022-07-13 11:29:29,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:29,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:29:29,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:29:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:29:29,630 INFO L87 Difference]: Start difference. First operand 679 states and 965 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:29,823 INFO L93 Difference]: Finished difference Result 717 states and 1030 transitions. [2022-07-13 11:29:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:29:29,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-07-13 11:29:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:29,826 INFO L225 Difference]: With dead ends: 717 [2022-07-13 11:29:29,826 INFO L226 Difference]: Without dead ends: 710 [2022-07-13 11:29:29,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:29,827 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 150 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:29,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1540 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-07-13 11:29:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2022-07-13 11:29:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3909249563699826) internal successors, (797), 579 states have internal predecessors, (797), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-13 11:29:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 980 transitions. [2022-07-13 11:29:29,857 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 980 transitions. Word has length 37 [2022-07-13 11:29:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:29,858 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 980 transitions. [2022-07-13 11:29:29,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 980 transitions. [2022-07-13 11:29:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 11:29:29,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:29,869 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] [2022-07-13 11:29:29,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 11:29:29,869 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -190291046, now seen corresponding path program 1 times [2022-07-13 11:29:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:29,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124431438] [2022-07-13 11:29:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:29,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:29,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 11:29:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124431438] [2022-07-13 11:29:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124431438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:29,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:29,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:29:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556517950] [2022-07-13 11:29:29,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:29:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:29:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:29:29,921 INFO L87 Difference]: Start difference. First operand 692 states and 980 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:30,225 INFO L93 Difference]: Finished difference Result 716 states and 1026 transitions. [2022-07-13 11:29:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-07-13 11:29:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:30,228 INFO L225 Difference]: With dead ends: 716 [2022-07-13 11:29:30,228 INFO L226 Difference]: Without dead ends: 710 [2022-07-13 11:29:30,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:30,229 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 780 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:30,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1451 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-07-13 11:29:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2022-07-13 11:29:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3891797556719023) internal successors, (796), 579 states have internal predecessors, (796), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-13 11:29:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 979 transitions. [2022-07-13 11:29:30,260 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 979 transitions. Word has length 39 [2022-07-13 11:29:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:30,260 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 979 transitions. [2022-07-13 11:29:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 979 transitions. [2022-07-13 11:29:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 11:29:30,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:30,261 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] [2022-07-13 11:29:30,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:29:30,262 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1290991354, now seen corresponding path program 1 times [2022-07-13 11:29:30,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951550656] [2022-07-13 11:29:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:30,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 11:29:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:30,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:30,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951550656] [2022-07-13 11:29:30,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951550656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:30,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:30,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:29:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893649435] [2022-07-13 11:29:30,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:30,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:29:30,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:29:30,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:30,304 INFO L87 Difference]: Start difference. First operand 692 states and 979 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:30,621 INFO L93 Difference]: Finished difference Result 731 states and 1044 transitions. [2022-07-13 11:29:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:29:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-07-13 11:29:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:30,624 INFO L225 Difference]: With dead ends: 731 [2022-07-13 11:29:30,624 INFO L226 Difference]: Without dead ends: 699 [2022-07-13 11:29:30,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:30,625 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 158 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 3958 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:30,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 3958 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-07-13 11:29:30,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 683. [2022-07-13 11:29:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3710247349823321) internal successors, (776), 572 states have internal predecessors, (776), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2022-07-13 11:29:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 955 transitions. [2022-07-13 11:29:30,656 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 955 transitions. Word has length 40 [2022-07-13 11:29:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:30,656 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 955 transitions. [2022-07-13 11:29:30,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 955 transitions. [2022-07-13 11:29:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 11:29:30,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:30,658 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] [2022-07-13 11:29:30,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 11:29:30,658 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:30,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1689117095, now seen corresponding path program 1 times [2022-07-13 11:29:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:30,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204299361] [2022-07-13 11:29:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:30,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204299361] [2022-07-13 11:29:30,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204299361] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:30,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:30,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:29:30,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055468646] [2022-07-13 11:29:30,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:30,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:29:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:30,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:29:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:30,696 INFO L87 Difference]: Start difference. First operand 683 states and 955 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:31,129 INFO L93 Difference]: Finished difference Result 764 states and 1068 transitions. [2022-07-13 11:29:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:29:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-07-13 11:29:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:31,132 INFO L225 Difference]: With dead ends: 764 [2022-07-13 11:29:31,132 INFO L226 Difference]: Without dead ends: 728 [2022-07-13 11:29:31,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:31,133 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 789 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:31,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 1511 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:29:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-07-13 11:29:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 683. [2022-07-13 11:29:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3692579505300353) internal successors, (775), 572 states have internal predecessors, (775), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2022-07-13 11:29:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 954 transitions. [2022-07-13 11:29:31,178 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 954 transitions. Word has length 41 [2022-07-13 11:29:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:31,178 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 954 transitions. [2022-07-13 11:29:31,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 954 transitions. [2022-07-13 11:29:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 11:29:31,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:31,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:31,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 11:29:31,180 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash -90091863, now seen corresponding path program 1 times [2022-07-13 11:29:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561070122] [2022-07-13 11:29:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:31,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 11:29:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:31,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:31,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561070122] [2022-07-13 11:29:31,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561070122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:31,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:31,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:29:31,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63989868] [2022-07-13 11:29:31,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:31,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:29:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:29:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:31,207 INFO L87 Difference]: Start difference. First operand 683 states and 954 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:31,576 INFO L93 Difference]: Finished difference Result 890 states and 1253 transitions. [2022-07-13 11:29:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-13 11:29:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:31,579 INFO L225 Difference]: With dead ends: 890 [2022-07-13 11:29:31,579 INFO L226 Difference]: Without dead ends: 678 [2022-07-13 11:29:31,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:31,580 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 252 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:31,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1790 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-07-13 11:29:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 662. [2022-07-13 11:29:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 548 states have (on average 1.364963503649635) internal successors, (748), 553 states have internal predecessors, (748), 82 states have call successors, (82), 26 states have call predecessors, (82), 31 states have return successors, (94), 82 states have call predecessors, (94), 77 states have call successors, (94) [2022-07-13 11:29:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 924 transitions. [2022-07-13 11:29:31,608 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 924 transitions. Word has length 43 [2022-07-13 11:29:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:31,609 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 924 transitions. [2022-07-13 11:29:31,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 924 transitions. [2022-07-13 11:29:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 11:29:31,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:31,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 11:29:31,611 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1421107692, now seen corresponding path program 1 times [2022-07-13 11:29:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:31,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975046418] [2022-07-13 11:29:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:31,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:31,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:31,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:31,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975046418] [2022-07-13 11:29:31,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975046418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:31,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:31,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:29:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064921016] [2022-07-13 11:29:31,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:31,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:29:31,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:29:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:29:31,702 INFO L87 Difference]: Start difference. First operand 662 states and 924 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:32,282 INFO L93 Difference]: Finished difference Result 692 states and 978 transitions. [2022-07-13 11:29:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:29:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-13 11:29:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:32,285 INFO L225 Difference]: With dead ends: 692 [2022-07-13 11:29:32,285 INFO L226 Difference]: Without dead ends: 676 [2022-07-13 11:29:32,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:32,286 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 98 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4437 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:32,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 4437 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:29:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-13 11:29:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2022-07-13 11:29:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 547 states have (on average 1.363802559414991) internal successors, (746), 552 states have internal predecessors, (746), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2022-07-13 11:29:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 920 transitions. [2022-07-13 11:29:32,311 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 920 transitions. Word has length 43 [2022-07-13 11:29:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:32,312 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 920 transitions. [2022-07-13 11:29:32,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 920 transitions. [2022-07-13 11:29:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:29:32,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:32,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:32,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 11:29:32,313 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash 531963361, now seen corresponding path program 1 times [2022-07-13 11:29:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:32,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641667920] [2022-07-13 11:29:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:32,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:32,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:32,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:32,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641667920] [2022-07-13 11:29:32,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641667920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:32,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:32,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 11:29:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147137670] [2022-07-13 11:29:32,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:32,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 11:29:32,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 11:29:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:29:32,396 INFO L87 Difference]: Start difference. First operand 660 states and 920 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:33,172 INFO L93 Difference]: Finished difference Result 712 states and 998 transitions. [2022-07-13 11:29:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:29:33,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-13 11:29:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:33,176 INFO L225 Difference]: With dead ends: 712 [2022-07-13 11:29:33,176 INFO L226 Difference]: Without dead ends: 691 [2022-07-13 11:29:33,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:29:33,177 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 171 mSDsluCounter, 4453 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5034 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:33,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 5034 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:29:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-07-13 11:29:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 659. [2022-07-13 11:29:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 546 states have (on average 1.3461538461538463) internal successors, (735), 551 states have internal predecessors, (735), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2022-07-13 11:29:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 909 transitions. [2022-07-13 11:29:33,204 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 909 transitions. Word has length 44 [2022-07-13 11:29:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:33,204 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 909 transitions. [2022-07-13 11:29:33,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 909 transitions. [2022-07-13 11:29:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:29:33,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:33,206 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] [2022-07-13 11:29:33,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 11:29:33,206 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:33,206 INFO L85 PathProgramCache]: Analyzing trace with hash -927803137, now seen corresponding path program 1 times [2022-07-13 11:29:33,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:33,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190830628] [2022-07-13 11:29:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 11:29:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:33,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:33,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190830628] [2022-07-13 11:29:33,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190830628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:33,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:33,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:29:33,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527552002] [2022-07-13 11:29:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:29:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:29:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:29:33,295 INFO L87 Difference]: Start difference. First operand 659 states and 909 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:33,871 INFO L93 Difference]: Finished difference Result 688 states and 962 transitions. [2022-07-13 11:29:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:29:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-07-13 11:29:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:33,874 INFO L225 Difference]: With dead ends: 688 [2022-07-13 11:29:33,874 INFO L226 Difference]: Without dead ends: 672 [2022-07-13 11:29:33,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:33,874 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 98 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:33,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 4293 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:29:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-07-13 11:29:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 656. [2022-07-13 11:29:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 544 states have (on average 1.3455882352941178) internal successors, (732), 549 states have internal predecessors, (732), 80 states have call successors, (80), 26 states have call predecessors, (80), 31 states have return successors, (92), 80 states have call predecessors, (92), 75 states have call successors, (92) [2022-07-13 11:29:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 904 transitions. [2022-07-13 11:29:33,903 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 904 transitions. Word has length 44 [2022-07-13 11:29:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:33,904 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 904 transitions. [2022-07-13 11:29:33,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 904 transitions. [2022-07-13 11:29:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 11:29:33,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:33,905 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] [2022-07-13 11:29:33,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 11:29:33,906 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:33,906 INFO L85 PathProgramCache]: Analyzing trace with hash 116231593, now seen corresponding path program 1 times [2022-07-13 11:29:33,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:33,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205535288] [2022-07-13 11:29:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 11:29:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:33,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205535288] [2022-07-13 11:29:33,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205535288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:33,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:33,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:29:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361512802] [2022-07-13 11:29:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:29:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:29:33,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:33,955 INFO L87 Difference]: Start difference. First operand 656 states and 904 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:34,301 INFO L93 Difference]: Finished difference Result 727 states and 1001 transitions. [2022-07-13 11:29:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:29:34,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-13 11:29:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:34,304 INFO L225 Difference]: With dead ends: 727 [2022-07-13 11:29:34,304 INFO L226 Difference]: Without dead ends: 660 [2022-07-13 11:29:34,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:29:34,304 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 218 mSDsluCounter, 3592 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4163 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:34,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 4163 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-07-13 11:29:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 644. [2022-07-13 11:29:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 535 states have (on average 1.3401869158878505) internal successors, (717), 540 states have internal predecessors, (717), 77 states have call successors, (77), 26 states have call predecessors, (77), 31 states have return successors, (89), 77 states have call predecessors, (89), 72 states have call successors, (89) [2022-07-13 11:29:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 883 transitions. [2022-07-13 11:29:34,329 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 883 transitions. Word has length 44 [2022-07-13 11:29:34,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:34,330 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 883 transitions. [2022-07-13 11:29:34,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 883 transitions. [2022-07-13 11:29:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 11:29:34,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:34,331 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] [2022-07-13 11:29:34,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 11:29:34,331 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash 39637354, now seen corresponding path program 1 times [2022-07-13 11:29:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722249776] [2022-07-13 11:29:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:34,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:34,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:34,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:34,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722249776] [2022-07-13 11:29:34,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722249776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:34,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:34,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:29:34,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086729065] [2022-07-13 11:29:34,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:34,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:29:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:29:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:29:34,379 INFO L87 Difference]: Start difference. First operand 644 states and 883 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:34,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:34,686 INFO L93 Difference]: Finished difference Result 789 states and 1125 transitions. [2022-07-13 11:29:34,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:29:34,687 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-13 11:29:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:34,689 INFO L225 Difference]: With dead ends: 789 [2022-07-13 11:29:34,689 INFO L226 Difference]: Without dead ends: 695 [2022-07-13 11:29:34,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:34,690 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 134 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:34,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 2206 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-13 11:29:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 651. [2022-07-13 11:29:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 540 states have (on average 1.3407407407407408) internal successors, (724), 546 states have internal predecessors, (724), 78 states have call successors, (78), 26 states have call predecessors, (78), 32 states have return successors, (96), 78 states have call predecessors, (96), 73 states have call successors, (96) [2022-07-13 11:29:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 898 transitions. [2022-07-13 11:29:34,716 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 898 transitions. Word has length 45 [2022-07-13 11:29:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:34,716 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 898 transitions. [2022-07-13 11:29:34,716 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 898 transitions. [2022-07-13 11:29:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 11:29:34,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:34,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 11:29:34,718 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -469835736, now seen corresponding path program 1 times [2022-07-13 11:29:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:34,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315677728] [2022-07-13 11:29:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:34,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:34,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:34,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315677728] [2022-07-13 11:29:34,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315677728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:34,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:34,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:29:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209375385] [2022-07-13 11:29:34,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:29:34,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:29:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:34,765 INFO L87 Difference]: Start difference. First operand 651 states and 898 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:35,013 INFO L93 Difference]: Finished difference Result 689 states and 966 transitions. [2022-07-13 11:29:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:29:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 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 45 [2022-07-13 11:29:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:35,016 INFO L225 Difference]: With dead ends: 689 [2022-07-13 11:29:35,016 INFO L226 Difference]: Without dead ends: 669 [2022-07-13 11:29:35,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:29:35,017 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 245 mSDsluCounter, 2892 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:35,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 3461 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-13 11:29:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 649. [2022-07-13 11:29:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 539 states have (on average 1.339517625231911) internal successors, (722), 545 states have internal predecessors, (722), 77 states have call successors, (77), 26 states have call predecessors, (77), 32 states have return successors, (95), 77 states have call predecessors, (95), 72 states have call successors, (95) [2022-07-13 11:29:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 894 transitions. [2022-07-13 11:29:35,069 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 894 transitions. Word has length 45 [2022-07-13 11:29:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:35,069 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 894 transitions. [2022-07-13 11:29:35,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 894 transitions. [2022-07-13 11:29:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 11:29:35,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:35,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:35,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 11:29:35,071 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1759820693, now seen corresponding path program 1 times [2022-07-13 11:29:35,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227836097] [2022-07-13 11:29:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:35,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:35,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:35,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:35,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227836097] [2022-07-13 11:29:35,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227836097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:35,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:35,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:29:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427506900] [2022-07-13 11:29:35,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:35,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:29:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:29:35,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:35,120 INFO L87 Difference]: Start difference. First operand 649 states and 894 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:35,360 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2022-07-13 11:29:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:29:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-13 11:29:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:35,363 INFO L225 Difference]: With dead ends: 696 [2022-07-13 11:29:35,363 INFO L226 Difference]: Without dead ends: 661 [2022-07-13 11:29:35,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:35,364 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 166 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:35,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 3568 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-07-13 11:29:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 641. [2022-07-13 11:29:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 533 states have (on average 1.3320825515947468) internal successors, (710), 539 states have internal predecessors, (710), 75 states have call successors, (75), 26 states have call predecessors, (75), 32 states have return successors, (93), 75 states have call predecessors, (93), 70 states have call successors, (93) [2022-07-13 11:29:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 878 transitions. [2022-07-13 11:29:35,388 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 878 transitions. Word has length 45 [2022-07-13 11:29:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:35,388 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 878 transitions. [2022-07-13 11:29:35,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 11:29:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 878 transitions. [2022-07-13 11:29:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 11:29:35,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:35,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 11:29:35,390 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:35,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:35,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1002239718, now seen corresponding path program 1 times [2022-07-13 11:29:35,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:35,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939018735] [2022-07-13 11:29:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:35,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:35,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939018735] [2022-07-13 11:29:35,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939018735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:35,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:35,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:29:35,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356920003] [2022-07-13 11:29:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:35,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:29:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:29:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:35,485 INFO L87 Difference]: Start difference. First operand 641 states and 878 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:36,167 INFO L93 Difference]: Finished difference Result 676 states and 943 transitions. [2022-07-13 11:29:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:29:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-07-13 11:29:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:36,170 INFO L225 Difference]: With dead ends: 676 [2022-07-13 11:29:36,170 INFO L226 Difference]: Without dead ends: 658 [2022-07-13 11:29:36,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:36,171 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 110 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 4329 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:36,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 4329 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-07-13 11:29:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2022-07-13 11:29:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 531 states have (on average 1.3314500941619585) internal successors, (707), 537 states have internal predecessors, (707), 74 states have call successors, (74), 26 states have call predecessors, (74), 32 states have return successors, (92), 74 states have call predecessors, (92), 69 states have call successors, (92) [2022-07-13 11:29:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 873 transitions. [2022-07-13 11:29:36,196 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 873 transitions. Word has length 46 [2022-07-13 11:29:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:36,196 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 873 transitions. [2022-07-13 11:29:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 873 transitions. [2022-07-13 11:29:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 11:29:36,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:36,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:36,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 11:29:36,198 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash -113531146, now seen corresponding path program 1 times [2022-07-13 11:29:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:36,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840380412] [2022-07-13 11:29:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:36,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:36,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:36,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 11:29:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840380412] [2022-07-13 11:29:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840380412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:36,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:36,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108303471] [2022-07-13 11:29:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:36,233 INFO L87 Difference]: Start difference. First operand 638 states and 873 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:36,498 INFO L93 Difference]: Finished difference Result 695 states and 980 transitions. [2022-07-13 11:29:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:36,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-07-13 11:29:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:36,501 INFO L225 Difference]: With dead ends: 695 [2022-07-13 11:29:36,501 INFO L226 Difference]: Without dead ends: 668 [2022-07-13 11:29:36,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:36,502 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 187 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:36,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 2314 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-13 11:29:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 642. [2022-07-13 11:29:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 533 states have (on average 1.3302063789868668) internal successors, (709), 541 states have internal predecessors, (709), 74 states have call successors, (74), 26 states have call predecessors, (74), 34 states have return successors, (108), 74 states have call predecessors, (108), 69 states have call successors, (108) [2022-07-13 11:29:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 891 transitions. [2022-07-13 11:29:36,528 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 891 transitions. Word has length 46 [2022-07-13 11:29:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:36,528 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 891 transitions. [2022-07-13 11:29:36,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 891 transitions. [2022-07-13 11:29:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 11:29:36,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:36,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:36,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 11:29:36,530 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1400503670, now seen corresponding path program 1 times [2022-07-13 11:29:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:36,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233171130] [2022-07-13 11:29:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:36,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 11:29:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:36,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:36,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:36,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233171130] [2022-07-13 11:29:36,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233171130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:36,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:36,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 11:29:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437575403] [2022-07-13 11:29:36,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:36,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 11:29:36,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 11:29:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:29:36,613 INFO L87 Difference]: Start difference. First operand 642 states and 891 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:37,303 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2022-07-13 11:29:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:29:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-07-13 11:29:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:37,306 INFO L225 Difference]: With dead ends: 696 [2022-07-13 11:29:37,306 INFO L226 Difference]: Without dead ends: 676 [2022-07-13 11:29:37,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:29:37,307 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 170 mSDsluCounter, 4257 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4777 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:37,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 4777 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-13 11:29:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 640. [2022-07-13 11:29:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 532 states have (on average 1.3289473684210527) internal successors, (707), 540 states have internal predecessors, (707), 73 states have call successors, (73), 26 states have call predecessors, (73), 34 states have return successors, (107), 73 states have call predecessors, (107), 68 states have call successors, (107) [2022-07-13 11:29:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 887 transitions. [2022-07-13 11:29:37,350 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 887 transitions. Word has length 47 [2022-07-13 11:29:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:37,351 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 887 transitions. [2022-07-13 11:29:37,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 887 transitions. [2022-07-13 11:29:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:29:37,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:37,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:37,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 11:29:37,353 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash -926060850, now seen corresponding path program 1 times [2022-07-13 11:29:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:37,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675965876] [2022-07-13 11:29:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:37,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:37,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 11:29:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:37,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:37,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:37,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675965876] [2022-07-13 11:29:37,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675965876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:37,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:37,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:29:37,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652779123] [2022-07-13 11:29:37,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:37,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:29:37,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:29:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:37,472 INFO L87 Difference]: Start difference. First operand 640 states and 887 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:38,024 INFO L93 Difference]: Finished difference Result 675 states and 952 transitions. [2022-07-13 11:29:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:29:38,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-07-13 11:29:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:38,026 INFO L225 Difference]: With dead ends: 675 [2022-07-13 11:29:38,026 INFO L226 Difference]: Without dead ends: 651 [2022-07-13 11:29:38,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:29:38,027 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 123 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4682 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:38,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 4682 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:29:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-07-13 11:29:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 631. [2022-07-13 11:29:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 525 states have (on average 1.3295238095238096) internal successors, (698), 533 states have internal predecessors, (698), 71 states have call successors, (71), 26 states have call predecessors, (71), 34 states have return successors, (105), 71 states have call predecessors, (105), 66 states have call successors, (105) [2022-07-13 11:29:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 874 transitions. [2022-07-13 11:29:38,072 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 874 transitions. Word has length 54 [2022-07-13 11:29:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:38,072 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 874 transitions. [2022-07-13 11:29:38,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 874 transitions. [2022-07-13 11:29:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:29:38,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:38,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:38,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 11:29:38,074 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1310476923, now seen corresponding path program 1 times [2022-07-13 11:29:38,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:38,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442380815] [2022-07-13 11:29:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:38,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:38,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:38,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:38,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:38,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442380815] [2022-07-13 11:29:38,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442380815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:38,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:38,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:29:38,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292493171] [2022-07-13 11:29:38,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:38,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:29:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:29:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:38,188 INFO L87 Difference]: Start difference. First operand 631 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:38,855 INFO L93 Difference]: Finished difference Result 666 states and 938 transitions. [2022-07-13 11:29:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:29:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-07-13 11:29:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:38,858 INFO L225 Difference]: With dead ends: 666 [2022-07-13 11:29:38,858 INFO L226 Difference]: Without dead ends: 648 [2022-07-13 11:29:38,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:29:38,858 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 123 mSDsluCounter, 4050 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4577 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:38,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 4577 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-07-13 11:29:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 628. [2022-07-13 11:29:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 523 states have (on average 1.3288718929254302) internal successors, (695), 531 states have internal predecessors, (695), 70 states have call successors, (70), 26 states have call predecessors, (70), 34 states have return successors, (104), 70 states have call predecessors, (104), 65 states have call successors, (104) [2022-07-13 11:29:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 869 transitions. [2022-07-13 11:29:38,909 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 869 transitions. Word has length 48 [2022-07-13 11:29:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:38,909 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 869 transitions. [2022-07-13 11:29:38,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 869 transitions. [2022-07-13 11:29:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 11:29:38,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:38,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:38,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-13 11:29:38,911 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:38,911 INFO L85 PathProgramCache]: Analyzing trace with hash -631995317, now seen corresponding path program 1 times [2022-07-13 11:29:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:38,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467564179] [2022-07-13 11:29:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:38,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:38,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:39,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467564179] [2022-07-13 11:29:39,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467564179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:39,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:39,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:29:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508039246] [2022-07-13 11:29:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:39,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:29:39,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:29:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:39,038 INFO L87 Difference]: Start difference. First operand 628 states and 869 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:39,714 INFO L93 Difference]: Finished difference Result 663 states and 933 transitions. [2022-07-13 11:29:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:29:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-07-13 11:29:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:39,718 INFO L225 Difference]: With dead ends: 663 [2022-07-13 11:29:39,718 INFO L226 Difference]: Without dead ends: 645 [2022-07-13 11:29:39,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:29:39,719 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 123 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4517 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:39,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 4517 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-07-13 11:29:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 625. [2022-07-13 11:29:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 521 states have (on average 1.328214971209213) internal successors, (692), 529 states have internal predecessors, (692), 69 states have call successors, (69), 26 states have call predecessors, (69), 34 states have return successors, (103), 69 states have call predecessors, (103), 64 states have call successors, (103) [2022-07-13 11:29:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 864 transitions. [2022-07-13 11:29:39,743 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 864 transitions. Word has length 47 [2022-07-13 11:29:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:39,744 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 864 transitions. [2022-07-13 11:29:39,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:39,744 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 864 transitions. [2022-07-13 11:29:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:29:39,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:39,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:39,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 11:29:39,745 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1897196007, now seen corresponding path program 1 times [2022-07-13 11:29:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:39,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528486446] [2022-07-13 11:29:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:39,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 11:29:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:39,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:39,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:39,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528486446] [2022-07-13 11:29:39,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528486446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:39,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:39,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:29:39,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183773023] [2022-07-13 11:29:39,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:39,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:29:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:29:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:39,787 INFO L87 Difference]: Start difference. First operand 625 states and 864 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:29:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:40,043 INFO L93 Difference]: Finished difference Result 886 states and 1230 transitions. [2022-07-13 11:29:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:40,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-13 11:29:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:40,046 INFO L225 Difference]: With dead ends: 886 [2022-07-13 11:29:40,046 INFO L226 Difference]: Without dead ends: 736 [2022-07-13 11:29:40,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:40,047 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 315 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:40,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1311 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-07-13 11:29:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 689. [2022-07-13 11:29:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 575 states have (on average 1.3269565217391304) internal successors, (763), 583 states have internal predecessors, (763), 72 states have call successors, (72), 30 states have call predecessors, (72), 41 states have return successors, (112), 75 states have call predecessors, (112), 68 states have call successors, (112) [2022-07-13 11:29:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 947 transitions. [2022-07-13 11:29:40,077 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 947 transitions. Word has length 50 [2022-07-13 11:29:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:40,077 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 947 transitions. [2022-07-13 11:29:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:29:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 947 transitions. [2022-07-13 11:29:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 11:29:40,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:40,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:40,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-13 11:29:40,079 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:40,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash -532277969, now seen corresponding path program 1 times [2022-07-13 11:29:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804165199] [2022-07-13 11:29:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:40,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:40,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:40,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:40,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:40,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:40,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804165199] [2022-07-13 11:29:40,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804165199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:40,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:40,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 11:29:40,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835221313] [2022-07-13 11:29:40,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:40,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:29:40,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:40,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:29:40,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:40,182 INFO L87 Difference]: Start difference. First operand 689 states and 947 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:41,044 INFO L93 Difference]: Finished difference Result 753 states and 1042 transitions. [2022-07-13 11:29:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:29:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-07-13 11:29:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:41,046 INFO L225 Difference]: With dead ends: 753 [2022-07-13 11:29:41,046 INFO L226 Difference]: Without dead ends: 733 [2022-07-13 11:29:41,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:29:41,047 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 245 mSDsluCounter, 4354 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 4860 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:41,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 4860 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:29:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-07-13 11:29:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 687. [2022-07-13 11:29:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 574 states have (on average 1.3257839721254356) internal successors, (761), 582 states have internal predecessors, (761), 71 states have call successors, (71), 30 states have call predecessors, (71), 41 states have return successors, (111), 74 states have call predecessors, (111), 67 states have call successors, (111) [2022-07-13 11:29:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 943 transitions. [2022-07-13 11:29:41,075 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 943 transitions. Word has length 52 [2022-07-13 11:29:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:41,075 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 943 transitions. [2022-07-13 11:29:41,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 943 transitions. [2022-07-13 11:29:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 11:29:41,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:41,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:41,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 11:29:41,077 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash 232958448, now seen corresponding path program 1 times [2022-07-13 11:29:41,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:41,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792766930] [2022-07-13 11:29:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:41,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:41,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:41,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 11:29:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:41,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:41,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:41,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792766930] [2022-07-13 11:29:41,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792766930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:41,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:41,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 11:29:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468188941] [2022-07-13 11:29:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:41,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:29:41,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:29:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:41,175 INFO L87 Difference]: Start difference. First operand 687 states and 943 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:41,900 INFO L93 Difference]: Finished difference Result 751 states and 1038 transitions. [2022-07-13 11:29:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:29:41,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-07-13 11:29:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:41,903 INFO L225 Difference]: With dead ends: 751 [2022-07-13 11:29:41,903 INFO L226 Difference]: Without dead ends: 731 [2022-07-13 11:29:41,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:29:41,904 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 264 mSDsluCounter, 3658 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 4161 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:41,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 4161 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-07-13 11:29:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 685. [2022-07-13 11:29:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 573 states have (on average 1.324607329842932) internal successors, (759), 581 states have internal predecessors, (759), 70 states have call successors, (70), 30 states have call predecessors, (70), 41 states have return successors, (110), 73 states have call predecessors, (110), 66 states have call successors, (110) [2022-07-13 11:29:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 939 transitions. [2022-07-13 11:29:41,938 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 939 transitions. Word has length 51 [2022-07-13 11:29:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:41,938 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 939 transitions. [2022-07-13 11:29:41,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 939 transitions. [2022-07-13 11:29:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:29:41,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:41,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:41,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-13 11:29:41,944 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:41,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1506455403, now seen corresponding path program 1 times [2022-07-13 11:29:41,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:41,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875751160] [2022-07-13 11:29:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:41,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:42,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:42,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:42,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875751160] [2022-07-13 11:29:42,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875751160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:42,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:42,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 11:29:42,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906869443] [2022-07-13 11:29:42,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:42,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 11:29:42,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:42,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 11:29:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:29:42,037 INFO L87 Difference]: Start difference. First operand 685 states and 939 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:42,734 INFO L93 Difference]: Finished difference Result 733 states and 1017 transitions. [2022-07-13 11:29:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:29:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-07-13 11:29:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:42,737 INFO L225 Difference]: With dead ends: 733 [2022-07-13 11:29:42,737 INFO L226 Difference]: Without dead ends: 713 [2022-07-13 11:29:42,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-13 11:29:42,737 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 149 mSDsluCounter, 3932 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 4419 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:42,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 4419 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-07-13 11:29:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 683. [2022-07-13 11:29:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 572 states have (on average 1.3234265734265733) internal successors, (757), 580 states have internal predecessors, (757), 69 states have call successors, (69), 30 states have call predecessors, (69), 41 states have return successors, (109), 72 states have call predecessors, (109), 65 states have call successors, (109) [2022-07-13 11:29:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 935 transitions. [2022-07-13 11:29:42,764 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 935 transitions. Word has length 48 [2022-07-13 11:29:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:42,764 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 935 transitions. [2022-07-13 11:29:42,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 935 transitions. [2022-07-13 11:29:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 11:29:42,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:42,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:42,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 11:29:42,766 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:42,767 INFO L85 PathProgramCache]: Analyzing trace with hash -273874573, now seen corresponding path program 1 times [2022-07-13 11:29:42,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:42,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807812077] [2022-07-13 11:29:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:42,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:42,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:42,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:29:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:42,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:42,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807812077] [2022-07-13 11:29:42,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807812077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:42,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:42,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:29:42,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980408607] [2022-07-13 11:29:42,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:42,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:29:42,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:42,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:29:42,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:42,795 INFO L87 Difference]: Start difference. First operand 683 states and 935 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:42,951 INFO L93 Difference]: Finished difference Result 939 states and 1289 transitions. [2022-07-13 11:29:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:29:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-07-13 11:29:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:42,953 INFO L225 Difference]: With dead ends: 939 [2022-07-13 11:29:42,953 INFO L226 Difference]: Without dead ends: 639 [2022-07-13 11:29:42,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:29:42,954 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 174 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:42,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1223 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-13 11:29:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 610. [2022-07-13 11:29:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 515 states have (on average 1.3184466019417476) internal successors, (679), 521 states have internal predecessors, (679), 60 states have call successors, (60), 27 states have call predecessors, (60), 34 states have return successors, (73), 61 states have call predecessors, (73), 56 states have call successors, (73) [2022-07-13 11:29:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 812 transitions. [2022-07-13 11:29:42,999 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 812 transitions. Word has length 48 [2022-07-13 11:29:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:42,999 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 812 transitions. [2022-07-13 11:29:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 812 transitions. [2022-07-13 11:29:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 11:29:43,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:43,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:43,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-13 11:29:43,001 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1171724014, now seen corresponding path program 1 times [2022-07-13 11:29:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:43,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660494795] [2022-07-13 11:29:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:43,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:29:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:43,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660494795] [2022-07-13 11:29:43,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660494795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:43,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:43,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:43,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667051521] [2022-07-13 11:29:43,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:43,038 INFO L87 Difference]: Start difference. First operand 610 states and 812 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:43,284 INFO L93 Difference]: Finished difference Result 704 states and 925 transitions. [2022-07-13 11:29:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:43,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 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 50 [2022-07-13 11:29:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:43,286 INFO L225 Difference]: With dead ends: 704 [2022-07-13 11:29:43,286 INFO L226 Difference]: Without dead ends: 678 [2022-07-13 11:29:43,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:43,286 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 337 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:43,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 2042 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-07-13 11:29:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 616. [2022-07-13 11:29:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 520 states have (on average 1.3173076923076923) internal successors, (685), 526 states have internal predecessors, (685), 61 states have call successors, (61), 27 states have call predecessors, (61), 34 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-07-13 11:29:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 820 transitions. [2022-07-13 11:29:43,310 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 820 transitions. Word has length 50 [2022-07-13 11:29:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:43,310 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 820 transitions. [2022-07-13 11:29:43,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 820 transitions. [2022-07-13 11:29:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:29:43,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:43,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-13 11:29:43,312 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash 850113778, now seen corresponding path program 1 times [2022-07-13 11:29:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:43,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333875516] [2022-07-13 11:29:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333875516] [2022-07-13 11:29:43,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333875516] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:43,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:43,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 11:29:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031705997] [2022-07-13 11:29:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:43,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 11:29:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 11:29:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:29:43,356 INFO L87 Difference]: Start difference. First operand 616 states and 820 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:29:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:43,623 INFO L93 Difference]: Finished difference Result 733 states and 980 transitions. [2022-07-13 11:29:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 11:29:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-07-13 11:29:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:43,626 INFO L225 Difference]: With dead ends: 733 [2022-07-13 11:29:43,626 INFO L226 Difference]: Without dead ends: 628 [2022-07-13 11:29:43,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:29:43,626 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 191 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:43,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1149 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-07-13 11:29:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 616. [2022-07-13 11:29:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 520 states have (on average 1.3134615384615385) internal successors, (683), 526 states have internal predecessors, (683), 61 states have call successors, (61), 27 states have call predecessors, (61), 34 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-07-13 11:29:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 818 transitions. [2022-07-13 11:29:43,654 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 818 transitions. Word has length 53 [2022-07-13 11:29:43,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:43,654 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 818 transitions. [2022-07-13 11:29:43,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 11:29:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 818 transitions. [2022-07-13 11:29:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 11:29:43,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:43,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:43,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-13 11:29:43,658 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash -381678341, now seen corresponding path program 1 times [2022-07-13 11:29:43,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:43,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050539502] [2022-07-13 11:29:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 11:29:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:29:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:43,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:43,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050539502] [2022-07-13 11:29:43,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050539502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:43,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:43,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:29:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685290674] [2022-07-13 11:29:43,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:29:43,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:29:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:43,709 INFO L87 Difference]: Start difference. First operand 616 states and 818 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:44,107 INFO L93 Difference]: Finished difference Result 662 states and 877 transitions. [2022-07-13 11:29:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:29:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 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 51 [2022-07-13 11:29:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:44,109 INFO L225 Difference]: With dead ends: 662 [2022-07-13 11:29:44,109 INFO L226 Difference]: Without dead ends: 608 [2022-07-13 11:29:44,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:29:44,109 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 185 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:44,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 3079 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-07-13 11:29:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 589. [2022-07-13 11:29:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 498 states have (on average 1.2991967871485943) internal successors, (647), 504 states have internal predecessors, (647), 56 states have call successors, (56), 27 states have call predecessors, (56), 34 states have return successors, (68), 57 states have call predecessors, (68), 52 states have call successors, (68) [2022-07-13 11:29:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 771 transitions. [2022-07-13 11:29:44,136 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 771 transitions. Word has length 51 [2022-07-13 11:29:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:44,137 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 771 transitions. [2022-07-13 11:29:44,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 771 transitions. [2022-07-13 11:29:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 11:29:44,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:44,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:44,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-13 11:29:44,138 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:44,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1990060921, now seen corresponding path program 1 times [2022-07-13 11:29:44,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:44,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579283107] [2022-07-13 11:29:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:44,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 11:29:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:29:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:44,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579283107] [2022-07-13 11:29:44,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579283107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:44,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:44,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:44,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891589101] [2022-07-13 11:29:44,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:44,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:44,179 INFO L87 Difference]: Start difference. First operand 589 states and 771 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:44,437 INFO L93 Difference]: Finished difference Result 642 states and 831 transitions. [2022-07-13 11:29:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:44,438 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-13 11:29:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:44,439 INFO L225 Difference]: With dead ends: 642 [2022-07-13 11:29:44,439 INFO L226 Difference]: Without dead ends: 595 [2022-07-13 11:29:44,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:44,440 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 98 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:44,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2000 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-07-13 11:29:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 579. [2022-07-13 11:29:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 490 states have (on average 1.2959183673469388) internal successors, (635), 496 states have internal predecessors, (635), 54 states have call successors, (54), 27 states have call predecessors, (54), 34 states have return successors, (66), 55 states have call predecessors, (66), 50 states have call successors, (66) [2022-07-13 11:29:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 755 transitions. [2022-07-13 11:29:44,465 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 755 transitions. Word has length 51 [2022-07-13 11:29:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:44,465 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 755 transitions. [2022-07-13 11:29:44,465 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 755 transitions. [2022-07-13 11:29:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 11:29:44,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:44,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:44,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-13 11:29:44,467 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash 105801563, now seen corresponding path program 1 times [2022-07-13 11:29:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:44,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539071359] [2022-07-13 11:29:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:44,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 11:29:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:44,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539071359] [2022-07-13 11:29:44,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539071359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:44,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:44,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:44,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827730921] [2022-07-13 11:29:44,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:44,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:44,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:44,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:44,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:44,515 INFO L87 Difference]: Start difference. First operand 579 states and 755 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:44,727 INFO L93 Difference]: Finished difference Result 618 states and 801 transitions. [2022-07-13 11:29:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:44,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-13 11:29:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:44,730 INFO L225 Difference]: With dead ends: 618 [2022-07-13 11:29:44,730 INFO L226 Difference]: Without dead ends: 586 [2022-07-13 11:29:44,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:44,730 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 171 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:44,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1753 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-13 11:29:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 574. [2022-07-13 11:29:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 486 states have (on average 1.2962962962962963) internal successors, (630), 492 states have internal predecessors, (630), 53 states have call successors, (53), 27 states have call predecessors, (53), 34 states have return successors, (65), 54 states have call predecessors, (65), 49 states have call successors, (65) [2022-07-13 11:29:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 748 transitions. [2022-07-13 11:29:44,765 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 748 transitions. Word has length 52 [2022-07-13 11:29:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:44,765 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 748 transitions. [2022-07-13 11:29:44,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 748 transitions. [2022-07-13 11:29:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 11:29:44,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:44,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:44,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-13 11:29:44,766 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1444104729, now seen corresponding path program 1 times [2022-07-13 11:29:44,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:44,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315407709] [2022-07-13 11:29:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:44,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315407709] [2022-07-13 11:29:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315407709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:44,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:44,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:29:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133037912] [2022-07-13 11:29:44,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:29:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:29:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:29:44,810 INFO L87 Difference]: Start difference. First operand 574 states and 748 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:45,143 INFO L93 Difference]: Finished difference Result 691 states and 900 transitions. [2022-07-13 11:29:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-07-13 11:29:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:45,146 INFO L225 Difference]: With dead ends: 691 [2022-07-13 11:29:45,146 INFO L226 Difference]: Without dead ends: 683 [2022-07-13 11:29:45,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:45,147 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 217 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:45,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1329 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-07-13 11:29:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 602. [2022-07-13 11:29:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 512 states have (on average 1.291015625) internal successors, (661), 518 states have internal predecessors, (661), 53 states have call successors, (53), 27 states have call predecessors, (53), 36 states have return successors, (67), 56 states have call predecessors, (67), 49 states have call successors, (67) [2022-07-13 11:29:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 781 transitions. [2022-07-13 11:29:45,171 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 781 transitions. Word has length 52 [2022-07-13 11:29:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:45,171 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 781 transitions. [2022-07-13 11:29:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 781 transitions. [2022-07-13 11:29:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:29:45,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:45,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:45,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-13 11:29:45,173 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2032610889, now seen corresponding path program 1 times [2022-07-13 11:29:45,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:45,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577376999] [2022-07-13 11:29:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:45,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:45,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577376999] [2022-07-13 11:29:45,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577376999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:45,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:45,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:45,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609547139] [2022-07-13 11:29:45,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:45,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:45,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:45,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:45,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:45,212 INFO L87 Difference]: Start difference. First operand 602 states and 781 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:45,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:45,634 INFO L93 Difference]: Finished difference Result 687 states and 894 transitions. [2022-07-13 11:29:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:29:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-07-13 11:29:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:45,637 INFO L225 Difference]: With dead ends: 687 [2022-07-13 11:29:45,637 INFO L226 Difference]: Without dead ends: 681 [2022-07-13 11:29:45,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:45,638 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 716 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:45,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1535 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-07-13 11:29:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 602. [2022-07-13 11:29:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 512 states have (on average 1.2890625) internal successors, (660), 518 states have internal predecessors, (660), 53 states have call successors, (53), 27 states have call predecessors, (53), 36 states have return successors, (67), 56 states have call predecessors, (67), 49 states have call successors, (67) [2022-07-13 11:29:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 780 transitions. [2022-07-13 11:29:45,665 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 780 transitions. Word has length 53 [2022-07-13 11:29:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:45,667 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 780 transitions. [2022-07-13 11:29:45,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 780 transitions. [2022-07-13 11:29:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 11:29:45,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:45,669 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] [2022-07-13 11:29:45,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-13 11:29:45,669 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:45,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2028580847, now seen corresponding path program 1 times [2022-07-13 11:29:45,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:45,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210407249] [2022-07-13 11:29:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:45,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:45,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:45,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:29:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:45,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:45,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210407249] [2022-07-13 11:29:45,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210407249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:45,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:45,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 11:29:45,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420297610] [2022-07-13 11:29:45,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:45,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 11:29:45,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:45,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 11:29:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:29:45,785 INFO L87 Difference]: Start difference. First operand 602 states and 780 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:46,405 INFO L93 Difference]: Finished difference Result 634 states and 819 transitions. [2022-07-13 11:29:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 11:29:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2022-07-13 11:29:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:46,407 INFO L225 Difference]: With dead ends: 634 [2022-07-13 11:29:46,407 INFO L226 Difference]: Without dead ends: 610 [2022-07-13 11:29:46,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:29:46,408 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 252 mSDsluCounter, 3530 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:46,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 3944 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:29:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-07-13 11:29:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 598. [2022-07-13 11:29:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 509 states have (on average 1.2888015717092338) internal successors, (656), 515 states have internal predecessors, (656), 52 states have call successors, (52), 27 states have call predecessors, (52), 36 states have return successors, (66), 55 states have call predecessors, (66), 48 states have call successors, (66) [2022-07-13 11:29:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 774 transitions. [2022-07-13 11:29:46,440 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 774 transitions. Word has length 55 [2022-07-13 11:29:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:46,440 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 774 transitions. [2022-07-13 11:29:46,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 774 transitions. [2022-07-13 11:29:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:29:46,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:46,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:46,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-13 11:29:46,442 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1717160597, now seen corresponding path program 1 times [2022-07-13 11:29:46,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:46,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545684321] [2022-07-13 11:29:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:46,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 11:29:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:46,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 11:29:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:46,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:46,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545684321] [2022-07-13 11:29:46,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545684321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:46,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:46,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227727412] [2022-07-13 11:29:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:46,485 INFO L87 Difference]: Start difference. First operand 598 states and 774 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:46,687 INFO L93 Difference]: Finished difference Result 637 states and 820 transitions. [2022-07-13 11:29:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:46,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-13 11:29:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:46,689 INFO L225 Difference]: With dead ends: 637 [2022-07-13 11:29:46,689 INFO L226 Difference]: Without dead ends: 605 [2022-07-13 11:29:46,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:46,690 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 171 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:46,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1696 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-07-13 11:29:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 593. [2022-07-13 11:29:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 505 states have (on average 1.2891089108910891) internal successors, (651), 511 states have internal predecessors, (651), 51 states have call successors, (51), 27 states have call predecessors, (51), 36 states have return successors, (65), 54 states have call predecessors, (65), 47 states have call successors, (65) [2022-07-13 11:29:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 767 transitions. [2022-07-13 11:29:46,720 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 767 transitions. Word has length 54 [2022-07-13 11:29:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:46,720 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 767 transitions. [2022-07-13 11:29:46,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 767 transitions. [2022-07-13 11:29:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:29:46,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:46,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:46,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-13 11:29:46,722 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1513646241, now seen corresponding path program 1 times [2022-07-13 11:29:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:46,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491501151] [2022-07-13 11:29:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:46,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 11:29:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:46,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 11:29:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:46,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:46,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491501151] [2022-07-13 11:29:46,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491501151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:46,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:46,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:29:46,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085184468] [2022-07-13 11:29:46,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:46,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:29:46,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:29:46,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:46,803 INFO L87 Difference]: Start difference. First operand 593 states and 767 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:47,154 INFO L93 Difference]: Finished difference Result 628 states and 810 transitions. [2022-07-13 11:29:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:29:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-13 11:29:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:47,155 INFO L225 Difference]: With dead ends: 628 [2022-07-13 11:29:47,155 INFO L226 Difference]: Without dead ends: 602 [2022-07-13 11:29:47,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:29:47,156 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 232 mSDsluCounter, 2698 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3112 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:47,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 3112 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-07-13 11:29:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2022-07-13 11:29:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 503 states have (on average 1.2882703777335984) internal successors, (648), 509 states have internal predecessors, (648), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2022-07-13 11:29:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 762 transitions. [2022-07-13 11:29:47,182 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 762 transitions. Word has length 54 [2022-07-13 11:29:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:47,182 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 762 transitions. [2022-07-13 11:29:47,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 762 transitions. [2022-07-13 11:29:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:29:47,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:47,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:47,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-13 11:29:47,183 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash 773886590, now seen corresponding path program 1 times [2022-07-13 11:29:47,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927887066] [2022-07-13 11:29:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:47,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:47,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:47,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927887066] [2022-07-13 11:29:47,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927887066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:47,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:47,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:47,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011851975] [2022-07-13 11:29:47,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:47,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:47,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:47,236 INFO L87 Difference]: Start difference. First operand 590 states and 762 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:47,563 INFO L93 Difference]: Finished difference Result 673 states and 872 transitions. [2022-07-13 11:29:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:29:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-13 11:29:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:47,565 INFO L225 Difference]: With dead ends: 673 [2022-07-13 11:29:47,565 INFO L226 Difference]: Without dead ends: 669 [2022-07-13 11:29:47,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:47,565 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 695 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:47,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1465 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-13 11:29:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 588. [2022-07-13 11:29:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 501 states have (on average 1.2874251497005988) internal successors, (645), 507 states have internal predecessors, (645), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2022-07-13 11:29:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 759 transitions. [2022-07-13 11:29:47,593 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 759 transitions. Word has length 54 [2022-07-13 11:29:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:47,593 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 759 transitions. [2022-07-13 11:29:47,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 759 transitions. [2022-07-13 11:29:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 11:29:47,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:47,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:47,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-13 11:29:47,595 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash 774163420, now seen corresponding path program 1 times [2022-07-13 11:29:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:47,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627568897] [2022-07-13 11:29:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:47,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:47,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:47,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:47,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:47,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627568897] [2022-07-13 11:29:47,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627568897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:47,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:47,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:29:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661068298] [2022-07-13 11:29:47,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:29:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:29:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:47,693 INFO L87 Difference]: Start difference. First operand 588 states and 759 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:48,346 INFO L93 Difference]: Finished difference Result 610 states and 786 transitions. [2022-07-13 11:29:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:29:48,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-07-13 11:29:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:48,348 INFO L225 Difference]: With dead ends: 610 [2022-07-13 11:29:48,348 INFO L226 Difference]: Without dead ends: 562 [2022-07-13 11:29:48,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:29:48,349 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 211 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:48,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2763 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:29:48,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-07-13 11:29:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 546. [2022-07-13 11:29:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 461 states have (on average 1.2776572668112798) internal successors, (589), 467 states have internal predecessors, (589), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2022-07-13 11:29:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 701 transitions. [2022-07-13 11:29:48,374 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 701 transitions. Word has length 54 [2022-07-13 11:29:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:48,374 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 701 transitions. [2022-07-13 11:29:48,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 701 transitions. [2022-07-13 11:29:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 11:29:48,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:48,376 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] [2022-07-13 11:29:48,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-13 11:29:48,376 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1350619309, now seen corresponding path program 1 times [2022-07-13 11:29:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:48,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040232514] [2022-07-13 11:29:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:48,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:29:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:48,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:48,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040232514] [2022-07-13 11:29:48,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040232514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:48,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:48,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:29:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29366316] [2022-07-13 11:29:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:48,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:29:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:29:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:48,427 INFO L87 Difference]: Start difference. First operand 546 states and 701 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:48,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:48,778 INFO L93 Difference]: Finished difference Result 607 states and 771 transitions. [2022-07-13 11:29:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:29:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-07-13 11:29:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:48,780 INFO L225 Difference]: With dead ends: 607 [2022-07-13 11:29:48,780 INFO L226 Difference]: Without dead ends: 576 [2022-07-13 11:29:48,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:29:48,782 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 187 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:48,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1767 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-13 11:29:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 546. [2022-07-13 11:29:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 461 states have (on average 1.2754880694143167) internal successors, (588), 467 states have internal predecessors, (588), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2022-07-13 11:29:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 700 transitions. [2022-07-13 11:29:48,808 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 700 transitions. Word has length 56 [2022-07-13 11:29:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:48,808 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 700 transitions. [2022-07-13 11:29:48,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 700 transitions. [2022-07-13 11:29:48,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 11:29:48,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:48,810 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] [2022-07-13 11:29:48,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-13 11:29:48,810 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1373251563, now seen corresponding path program 1 times [2022-07-13 11:29:48,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:48,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205343894] [2022-07-13 11:29:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:48,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:29:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:48,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:48,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205343894] [2022-07-13 11:29:48,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205343894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:48,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:48,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 11:29:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241465444] [2022-07-13 11:29:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:29:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:29:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:48,912 INFO L87 Difference]: Start difference. First operand 546 states and 700 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:49,369 INFO L93 Difference]: Finished difference Result 601 states and 767 transitions. [2022-07-13 11:29:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:29:49,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-07-13 11:29:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:49,384 INFO L225 Difference]: With dead ends: 601 [2022-07-13 11:29:49,384 INFO L226 Difference]: Without dead ends: 571 [2022-07-13 11:29:49,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:29:49,385 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 276 mSDsluCounter, 2836 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 3235 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:49,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 3235 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:29:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-13 11:29:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 541. [2022-07-13 11:29:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 457 states have (on average 1.2713347921225382) internal successors, (581), 463 states have internal predecessors, (581), 49 states have call successors, (49), 27 states have call predecessors, (49), 34 states have return successors, (60), 50 states have call predecessors, (60), 45 states have call successors, (60) [2022-07-13 11:29:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 690 transitions. [2022-07-13 11:29:49,411 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 690 transitions. Word has length 56 [2022-07-13 11:29:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:49,411 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 690 transitions. [2022-07-13 11:29:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 690 transitions. [2022-07-13 11:29:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 11:29:49,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:49,412 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] [2022-07-13 11:29:49,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-13 11:29:49,413 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -801787505, now seen corresponding path program 1 times [2022-07-13 11:29:49,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:49,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021035583] [2022-07-13 11:29:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:29:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:49,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:49,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021035583] [2022-07-13 11:29:49,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021035583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:49,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:49,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:29:49,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056414469] [2022-07-13 11:29:49,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:49,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:29:49,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:49,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:29:49,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:49,464 INFO L87 Difference]: Start difference. First operand 541 states and 690 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:49,744 INFO L93 Difference]: Finished difference Result 584 states and 740 transitions. [2022-07-13 11:29:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:29:49,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-07-13 11:29:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:49,746 INFO L225 Difference]: With dead ends: 584 [2022-07-13 11:29:49,746 INFO L226 Difference]: Without dead ends: 547 [2022-07-13 11:29:49,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:29:49,747 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 261 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:49,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1436 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-07-13 11:29:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 535. [2022-07-13 11:29:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 452 states have (on average 1.2721238938053097) internal successors, (575), 458 states have internal predecessors, (575), 48 states have call successors, (48), 27 states have call predecessors, (48), 34 states have return successors, (59), 49 states have call predecessors, (59), 44 states have call successors, (59) [2022-07-13 11:29:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 682 transitions. [2022-07-13 11:29:49,772 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 682 transitions. Word has length 56 [2022-07-13 11:29:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:49,772 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 682 transitions. [2022-07-13 11:29:49,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 682 transitions. [2022-07-13 11:29:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:29:49,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:49,773 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] [2022-07-13 11:29:49,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-13 11:29:49,774 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1511727278, now seen corresponding path program 1 times [2022-07-13 11:29:49,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:49,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443190201] [2022-07-13 11:29:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:49,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 11:29:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:29:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:49,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443190201] [2022-07-13 11:29:49,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443190201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:49,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:49,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:29:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403922172] [2022-07-13 11:29:49,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:49,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:29:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:29:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:49,817 INFO L87 Difference]: Start difference. First operand 535 states and 682 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:50,168 INFO L93 Difference]: Finished difference Result 578 states and 732 transitions. [2022-07-13 11:29:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 11:29:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-07-13 11:29:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:50,169 INFO L225 Difference]: With dead ends: 578 [2022-07-13 11:29:50,169 INFO L226 Difference]: Without dead ends: 535 [2022-07-13 11:29:50,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:29:50,170 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 168 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:50,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1805 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-07-13 11:29:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2022-07-13 11:29:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 441 states have (on average 1.2675736961451247) internal successors, (559), 447 states have internal predecessors, (559), 47 states have call successors, (47), 27 states have call predecessors, (47), 34 states have return successors, (58), 48 states have call predecessors, (58), 43 states have call successors, (58) [2022-07-13 11:29:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 664 transitions. [2022-07-13 11:29:50,195 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 664 transitions. Word has length 58 [2022-07-13 11:29:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:50,195 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 664 transitions. [2022-07-13 11:29:50,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 664 transitions. [2022-07-13 11:29:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 11:29:50,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:50,197 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] [2022-07-13 11:29:50,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-13 11:29:50,197 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:50,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1341431007, now seen corresponding path program 1 times [2022-07-13 11:29:50,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:50,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036143474] [2022-07-13 11:29:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:50,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:50,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 11:29:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:50,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 11:29:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:50,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:50,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:50,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036143474] [2022-07-13 11:29:50,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036143474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:50,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:50,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 11:29:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048422975] [2022-07-13 11:29:50,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:29:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:29:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:50,295 INFO L87 Difference]: Start difference. First operand 523 states and 664 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 11:29:50,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:50,984 INFO L93 Difference]: Finished difference Result 571 states and 720 transitions. [2022-07-13 11:29:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:29:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-07-13 11:29:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:50,986 INFO L225 Difference]: With dead ends: 571 [2022-07-13 11:29:50,986 INFO L226 Difference]: Without dead ends: 551 [2022-07-13 11:29:50,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:29:50,986 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 249 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:50,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 3259 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-13 11:29:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 521. [2022-07-13 11:29:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 440 states have (on average 1.2659090909090909) internal successors, (557), 446 states have internal predecessors, (557), 46 states have call successors, (46), 27 states have call predecessors, (46), 34 states have return successors, (57), 47 states have call predecessors, (57), 42 states have call successors, (57) [2022-07-13 11:29:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 660 transitions. [2022-07-13 11:29:51,013 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 660 transitions. Word has length 59 [2022-07-13 11:29:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:51,014 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 660 transitions. [2022-07-13 11:29:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 11:29:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 660 transitions. [2022-07-13 11:29:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 11:29:51,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:51,028 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] [2022-07-13 11:29:51,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-13 11:29:51,028 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 477751716, now seen corresponding path program 1 times [2022-07-13 11:29:51,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:51,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456348769] [2022-07-13 11:29:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:51,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:51,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 11:29:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:51,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:51,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456348769] [2022-07-13 11:29:51,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456348769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:51,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:51,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:29:51,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228359899] [2022-07-13 11:29:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:29:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:29:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:51,135 INFO L87 Difference]: Start difference. First operand 521 states and 660 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:51,631 INFO L93 Difference]: Finished difference Result 549 states and 694 transitions. [2022-07-13 11:29:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:29:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-07-13 11:29:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:51,633 INFO L225 Difference]: With dead ends: 549 [2022-07-13 11:29:51,633 INFO L226 Difference]: Without dead ends: 531 [2022-07-13 11:29:51,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:29:51,644 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 115 mSDsluCounter, 2538 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:51,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 2887 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:29:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-13 11:29:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 519. [2022-07-13 11:29:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 439 states have (on average 1.2642369020501139) internal successors, (555), 445 states have internal predecessors, (555), 45 states have call successors, (45), 27 states have call predecessors, (45), 34 states have return successors, (56), 46 states have call predecessors, (56), 41 states have call successors, (56) [2022-07-13 11:29:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 656 transitions. [2022-07-13 11:29:51,671 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 656 transitions. Word has length 57 [2022-07-13 11:29:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:51,671 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 656 transitions. [2022-07-13 11:29:51,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 11:29:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 656 transitions. [2022-07-13 11:29:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:29:51,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:51,673 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] [2022-07-13 11:29:51,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-13 11:29:51,673 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash 999008539, now seen corresponding path program 1 times [2022-07-13 11:29:51,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:51,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770691383] [2022-07-13 11:29:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:51,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:51,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:51,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:51,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:51,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770691383] [2022-07-13 11:29:51,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770691383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:51,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:51,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:29:51,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252484874] [2022-07-13 11:29:51,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:51,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:29:51,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:29:51,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:51,795 INFO L87 Difference]: Start difference. First operand 519 states and 656 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:52,914 INFO L93 Difference]: Finished difference Result 1057 states and 1338 transitions. [2022-07-13 11:29:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 11:29:52,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2022-07-13 11:29:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:52,916 INFO L225 Difference]: With dead ends: 1057 [2022-07-13 11:29:52,916 INFO L226 Difference]: Without dead ends: 940 [2022-07-13 11:29:52,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 11:29:52,917 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 943 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:52,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 2331 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 11:29:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-07-13 11:29:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 716. [2022-07-13 11:29:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 601 states have (on average 1.276206322795341) internal successors, (767), 614 states have internal predecessors, (767), 63 states have call successors, (63), 40 states have call predecessors, (63), 51 states have return successors, (82), 61 states have call predecessors, (82), 59 states have call successors, (82) [2022-07-13 11:29:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 912 transitions. [2022-07-13 11:29:52,962 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 912 transitions. Word has length 58 [2022-07-13 11:29:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:52,962 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 912 transitions. [2022-07-13 11:29:52,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 912 transitions. [2022-07-13 11:29:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:29:52,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:52,964 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] [2022-07-13 11:29:52,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-13 11:29:52,964 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:52,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1875027545, now seen corresponding path program 1 times [2022-07-13 11:29:52,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:52,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075256957] [2022-07-13 11:29:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:52,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:52,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:52,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:53,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:53,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:53,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075256957] [2022-07-13 11:29:53,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075256957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:53,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:53,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:53,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027560781] [2022-07-13 11:29:53,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:53,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:53,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:53,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:53,008 INFO L87 Difference]: Start difference. First operand 716 states and 912 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:53,545 INFO L93 Difference]: Finished difference Result 1041 states and 1317 transitions. [2022-07-13 11:29:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:29:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2022-07-13 11:29:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:53,547 INFO L225 Difference]: With dead ends: 1041 [2022-07-13 11:29:53,548 INFO L226 Difference]: Without dead ends: 957 [2022-07-13 11:29:53,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:53,548 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1092 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:53,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 1838 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:29:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-07-13 11:29:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 532. [2022-07-13 11:29:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 451 states have (on average 1.2594235033259424) internal successors, (568), 456 states have internal predecessors, (568), 45 states have call successors, (45), 29 states have call predecessors, (45), 35 states have return successors, (56), 46 states have call predecessors, (56), 41 states have call successors, (56) [2022-07-13 11:29:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 669 transitions. [2022-07-13 11:29:53,604 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 669 transitions. Word has length 58 [2022-07-13 11:29:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:53,604 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 669 transitions. [2022-07-13 11:29:53,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 669 transitions. [2022-07-13 11:29:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:29:53,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:53,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:53,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-13 11:29:53,605 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1125550286, now seen corresponding path program 1 times [2022-07-13 11:29:53,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:53,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670847565] [2022-07-13 11:29:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:53,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:53,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 11:29:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 11:29:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:53,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:53,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670847565] [2022-07-13 11:29:53,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670847565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:53,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:53,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 11:29:53,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010971797] [2022-07-13 11:29:53,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:53,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:29:53,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:29:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:53,710 INFO L87 Difference]: Start difference. First operand 532 states and 669 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 11:29:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:54,285 INFO L93 Difference]: Finished difference Result 567 states and 713 transitions. [2022-07-13 11:29:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:29:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2022-07-13 11:29:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:54,287 INFO L225 Difference]: With dead ends: 567 [2022-07-13 11:29:54,287 INFO L226 Difference]: Without dead ends: 535 [2022-07-13 11:29:54,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:29:54,287 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 303 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:54,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 2768 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 11:29:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-07-13 11:29:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2022-07-13 11:29:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 444 states have (on average 1.2567567567567568) internal successors, (558), 449 states have internal predecessors, (558), 43 states have call successors, (43), 29 states have call predecessors, (43), 35 states have return successors, (53), 44 states have call predecessors, (53), 39 states have call successors, (53) [2022-07-13 11:29:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 654 transitions. [2022-07-13 11:29:54,320 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 654 transitions. Word has length 60 [2022-07-13 11:29:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:54,320 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 654 transitions. [2022-07-13 11:29:54,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 11:29:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 654 transitions. [2022-07-13 11:29:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 11:29:54,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:54,322 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] [2022-07-13 11:29:54,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-13 11:29:54,322 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2088220112, now seen corresponding path program 1 times [2022-07-13 11:29:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:54,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534714730] [2022-07-13 11:29:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:54,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 11:29:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:54,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:54,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534714730] [2022-07-13 11:29:54,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534714730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:54,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:54,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:54,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605327206] [2022-07-13 11:29:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:54,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:54,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:54,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:54,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:54,379 INFO L87 Difference]: Start difference. First operand 523 states and 654 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:54,600 INFO L93 Difference]: Finished difference Result 562 states and 699 transitions. [2022-07-13 11:29:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-07-13 11:29:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:54,602 INFO L225 Difference]: With dead ends: 562 [2022-07-13 11:29:54,602 INFO L226 Difference]: Without dead ends: 527 [2022-07-13 11:29:54,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:54,602 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 92 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:54,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1579 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-13 11:29:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 515. [2022-07-13 11:29:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 437 states have (on average 1.2562929061784898) internal successors, (549), 442 states have internal predecessors, (549), 42 states have call successors, (42), 29 states have call predecessors, (42), 35 states have return successors, (51), 43 states have call predecessors, (51), 38 states have call successors, (51) [2022-07-13 11:29:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 642 transitions. [2022-07-13 11:29:54,640 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 642 transitions. Word has length 58 [2022-07-13 11:29:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:54,640 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 642 transitions. [2022-07-13 11:29:54,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 11:29:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 642 transitions. [2022-07-13 11:29:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:29:54,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:54,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:54,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-13 11:29:54,641 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:54,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:54,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1074633973, now seen corresponding path program 1 times [2022-07-13 11:29:54,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:54,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300508129] [2022-07-13 11:29:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:54,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:29:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-13 11:29:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:29:54,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:54,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300508129] [2022-07-13 11:29:54,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300508129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:54,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:54,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:29:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126269671] [2022-07-13 11:29:54,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:54,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:29:54,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:29:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:54,694 INFO L87 Difference]: Start difference. First operand 515 states and 642 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:54,882 INFO L93 Difference]: Finished difference Result 554 states and 687 transitions. [2022-07-13 11:29:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-07-13 11:29:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:54,885 INFO L225 Difference]: With dead ends: 554 [2022-07-13 11:29:54,885 INFO L226 Difference]: Without dead ends: 517 [2022-07-13 11:29:54,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:54,885 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 156 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:54,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1361 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-13 11:29:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 505. [2022-07-13 11:29:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 429 states have (on average 1.2564102564102564) internal successors, (539), 434 states have internal predecessors, (539), 40 states have call successors, (40), 29 states have call predecessors, (40), 35 states have return successors, (49), 41 states have call predecessors, (49), 36 states have call successors, (49) [2022-07-13 11:29:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 628 transitions. [2022-07-13 11:29:54,917 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 628 transitions. Word has length 60 [2022-07-13 11:29:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:54,918 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 628 transitions. [2022-07-13 11:29:54,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 628 transitions. [2022-07-13 11:29:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:29:54,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:54,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:54,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-13 11:29:54,919 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 175179390, now seen corresponding path program 1 times [2022-07-13 11:29:54,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:54,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866373780] [2022-07-13 11:29:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:54,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 11:29:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:54,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:55,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:55,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:55,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866373780] [2022-07-13 11:29:55,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866373780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:55,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:55,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:29:55,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954087813] [2022-07-13 11:29:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:29:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:29:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:55,011 INFO L87 Difference]: Start difference. First operand 505 states and 628 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:55,792 INFO L93 Difference]: Finished difference Result 892 states and 1122 transitions. [2022-07-13 11:29:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 11:29:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-07-13 11:29:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:55,794 INFO L225 Difference]: With dead ends: 892 [2022-07-13 11:29:55,794 INFO L226 Difference]: Without dead ends: 787 [2022-07-13 11:29:55,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-07-13 11:29:55,795 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 545 mSDsluCounter, 2700 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:55,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 3260 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 11:29:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-07-13 11:29:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 399. [2022-07-13 11:29:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 335 states have (on average 1.2686567164179106) internal successors, (425), 339 states have internal predecessors, (425), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-13 11:29:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 502 transitions. [2022-07-13 11:29:55,825 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 502 transitions. Word has length 60 [2022-07-13 11:29:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:55,825 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 502 transitions. [2022-07-13 11:29:55,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 11:29:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 502 transitions. [2022-07-13 11:29:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:29:55,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:55,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:55,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-13 11:29:55,827 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268864, now seen corresponding path program 1 times [2022-07-13 11:29:55,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:55,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562850465] [2022-07-13 11:29:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:55,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:55,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:55,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 11:29:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:55,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:55,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:55,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562850465] [2022-07-13 11:29:55,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562850465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:55,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:55,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 11:29:55,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386821877] [2022-07-13 11:29:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:55,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:29:55,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:29:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:29:55,952 INFO L87 Difference]: Start difference. First operand 399 states and 502 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 11:29:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:56,459 INFO L93 Difference]: Finished difference Result 431 states and 540 transitions. [2022-07-13 11:29:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:29:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2022-07-13 11:29:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:56,460 INFO L225 Difference]: With dead ends: 431 [2022-07-13 11:29:56,460 INFO L226 Difference]: Without dead ends: 409 [2022-07-13 11:29:56,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:29:56,461 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 194 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:56,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 2280 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 11:29:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-07-13 11:29:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 397. [2022-07-13 11:29:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 333 states have (on average 1.2672672672672673) internal successors, (422), 337 states have internal predecessors, (422), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-13 11:29:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 499 transitions. [2022-07-13 11:29:56,489 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 499 transitions. Word has length 62 [2022-07-13 11:29:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:56,489 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 499 transitions. [2022-07-13 11:29:56,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 11:29:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 499 transitions. [2022-07-13 11:29:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 11:29:56,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:56,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:56,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-13 11:29:56,491 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:56,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash 224602701, now seen corresponding path program 1 times [2022-07-13 11:29:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:56,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871717991] [2022-07-13 11:29:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:56,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:56,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:56,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 11:29:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:56,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871717991] [2022-07-13 11:29:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871717991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 11:29:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668107905] [2022-07-13 11:29:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 11:29:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 11:29:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:29:56,611 INFO L87 Difference]: Start difference. First operand 397 states and 499 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:29:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:56,939 INFO L93 Difference]: Finished difference Result 594 states and 758 transitions. [2022-07-13 11:29:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:29:56,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-07-13 11:29:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:56,941 INFO L225 Difference]: With dead ends: 594 [2022-07-13 11:29:56,942 INFO L226 Difference]: Without dead ends: 402 [2022-07-13 11:29:56,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:29:56,942 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 236 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:56,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1542 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-13 11:29:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2022-07-13 11:29:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 326 states have (on average 1.2607361963190185) internal successors, (411), 330 states have internal predecessors, (411), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-13 11:29:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 488 transitions. [2022-07-13 11:29:56,979 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 488 transitions. Word has length 64 [2022-07-13 11:29:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:56,980 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 488 transitions. [2022-07-13 11:29:56,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 11:29:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 488 transitions. [2022-07-13 11:29:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 11:29:56,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:56,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-13 11:29:56,981 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1555287307, now seen corresponding path program 1 times [2022-07-13 11:29:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:56,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447247781] [2022-07-13 11:29:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 11:29:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 11:29:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 11:29:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:57,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:57,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447247781] [2022-07-13 11:29:57,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447247781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:57,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:57,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 11:29:57,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011506914] [2022-07-13 11:29:57,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:57,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 11:29:57,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:57,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 11:29:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:29:57,027 INFO L87 Difference]: Start difference. First operand 390 states and 488 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:29:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:57,247 INFO L93 Difference]: Finished difference Result 423 states and 525 transitions. [2022-07-13 11:29:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:29:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 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 66 [2022-07-13 11:29:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:57,249 INFO L225 Difference]: With dead ends: 423 [2022-07-13 11:29:57,249 INFO L226 Difference]: Without dead ends: 373 [2022-07-13 11:29:57,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-13 11:29:57,251 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 121 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:57,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1087 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:29:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-13 11:29:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 361. [2022-07-13 11:29:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 303 states have (on average 1.2640264026402641) internal successors, (383), 307 states have internal predecessors, (383), 30 states have call successors, (30), 24 states have call predecessors, (30), 27 states have return successors, (36), 29 states have call predecessors, (36), 27 states have call successors, (36) [2022-07-13 11:29:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 449 transitions. [2022-07-13 11:29:57,303 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 449 transitions. Word has length 66 [2022-07-13 11:29:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:57,303 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 449 transitions. [2022-07-13 11:29:57,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 11:29:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 449 transitions. [2022-07-13 11:29:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 11:29:57,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:57,304 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] [2022-07-13 11:29:57,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-13 11:29:57,305 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:57,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1823600415, now seen corresponding path program 1 times [2022-07-13 11:29:57,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:57,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940381052] [2022-07-13 11:29:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:57,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 11:29:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 11:29:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 11:29:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:29:57,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:57,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940381052] [2022-07-13 11:29:57,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940381052] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:29:57,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177192959] [2022-07-13 11:29:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:57,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:29:57,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:29:57,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:29:57,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:29:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:29:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:57,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:29:57,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177192959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:57,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:29:57,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-07-13 11:29:57,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083932911] [2022-07-13 11:29:57,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:57,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:29:57,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:29:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:57,581 INFO L87 Difference]: Start difference. First operand 361 states and 449 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:57,620 INFO L93 Difference]: Finished difference Result 384 states and 471 transitions. [2022-07-13 11:29:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:29:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-07-13 11:29:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:57,621 INFO L225 Difference]: With dead ends: 384 [2022-07-13 11:29:57,621 INFO L226 Difference]: Without dead ends: 332 [2022-07-13 11:29:57,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:29:57,622 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 0 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:57,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 917 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:57,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-07-13 11:29:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-07-13 11:29:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 280 states have (on average 1.275) internal successors, (357), 283 states have internal predecessors, (357), 27 states have call successors, (27), 22 states have call predecessors, (27), 24 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-13 11:29:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 416 transitions. [2022-07-13 11:29:57,651 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 416 transitions. Word has length 62 [2022-07-13 11:29:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:57,651 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 416 transitions. [2022-07-13 11:29:57,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 11:29:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 416 transitions. [2022-07-13 11:29:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 11:29:57,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:57,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:57,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:29:57,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-13 11:29:57,870 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2069212948, now seen corresponding path program 1 times [2022-07-13 11:29:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780923496] [2022-07-13 11:29:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 11:29:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 11:29:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 11:29:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:57,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780923496] [2022-07-13 11:29:57,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780923496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:57,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:57,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 11:29:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443533417] [2022-07-13 11:29:57,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 11:29:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 11:29:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:29:57,972 INFO L87 Difference]: Start difference. First operand 332 states and 416 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:29:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:58,350 INFO L93 Difference]: Finished difference Result 346 states and 433 transitions. [2022-07-13 11:29:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:29:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-07-13 11:29:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:58,351 INFO L225 Difference]: With dead ends: 346 [2022-07-13 11:29:58,351 INFO L226 Difference]: Without dead ends: 270 [2022-07-13 11:29:58,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:29:58,352 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 154 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:58,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1699 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 11:29:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-13 11:29:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2022-07-13 11:29:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.3) internal successors, (286), 222 states have internal predecessors, (286), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2022-07-13 11:29:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 336 transitions. [2022-07-13 11:29:58,373 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 336 transitions. Word has length 64 [2022-07-13 11:29:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:58,373 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 336 transitions. [2022-07-13 11:29:58,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 11:29:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 336 transitions. [2022-07-13 11:29:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 11:29:58,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:58,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:58,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-13 11:29:58,375 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash 585691284, now seen corresponding path program 1 times [2022-07-13 11:29:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:58,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313359053] [2022-07-13 11:29:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:58,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 11:29:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:58,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:58,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313359053] [2022-07-13 11:29:58,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313359053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:58,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:58,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:29:58,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119275862] [2022-07-13 11:29:58,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:58,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:29:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:29:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:58,456 INFO L87 Difference]: Start difference. First operand 264 states and 336 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:29:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:58,659 INFO L93 Difference]: Finished difference Result 455 states and 585 transitions. [2022-07-13 11:29:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:29:58,660 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2022-07-13 11:29:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:58,661 INFO L225 Difference]: With dead ends: 455 [2022-07-13 11:29:58,661 INFO L226 Difference]: Without dead ends: 270 [2022-07-13 11:29:58,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-13 11:29:58,662 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 218 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:58,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 730 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-13 11:29:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2022-07-13 11:29:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.2954545454545454) internal successors, (285), 222 states have internal predecessors, (285), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2022-07-13 11:29:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2022-07-13 11:29:58,701 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 68 [2022-07-13 11:29:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:58,701 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2022-07-13 11:29:58,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 11:29:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2022-07-13 11:29:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 11:29:58,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:58,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:58,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-13 11:29:58,702 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1800918031, now seen corresponding path program 1 times [2022-07-13 11:29:58,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:58,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810278604] [2022-07-13 11:29:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:58,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:29:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:58,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810278604] [2022-07-13 11:29:58,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810278604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:58,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:58,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 11:29:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904030984] [2022-07-13 11:29:58,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 11:29:58,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 11:29:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 11:29:58,775 INFO L87 Difference]: Start difference. First operand 264 states and 335 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 11:29:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:58,950 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2022-07-13 11:29:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:29:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-07-13 11:29:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:58,951 INFO L225 Difference]: With dead ends: 343 [2022-07-13 11:29:58,951 INFO L226 Difference]: Without dead ends: 216 [2022-07-13 11:29:58,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:29:58,952 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 97 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:58,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 748 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-13 11:29:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2022-07-13 11:29:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 146 states have internal predecessors, (179), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-13 11:29:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2022-07-13 11:29:58,966 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 70 [2022-07-13 11:29:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:58,966 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2022-07-13 11:29:58,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 11:29:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2022-07-13 11:29:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 11:29:58,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:58,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:58,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-13 11:29:58,968 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1069664757, now seen corresponding path program 1 times [2022-07-13 11:29:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:58,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179598170] [2022-07-13 11:29:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:29:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 11:29:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:59,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:59,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179598170] [2022-07-13 11:29:59,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179598170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:59,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:59,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:29:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981711225] [2022-07-13 11:29:59,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:29:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:29:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:59,046 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 11:29:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:59,237 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-07-13 11:29:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 11:29:59,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2022-07-13 11:29:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:59,238 INFO L225 Difference]: With dead ends: 224 [2022-07-13 11:29:59,238 INFO L226 Difference]: Without dead ends: 185 [2022-07-13 11:29:59,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:29:59,239 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 219 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:59,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 814 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-13 11:29:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2022-07-13 11:29:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 144 states have internal predecessors, (172), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-13 11:29:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2022-07-13 11:29:59,253 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 84 [2022-07-13 11:29:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:59,254 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2022-07-13 11:29:59,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 11:29:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2022-07-13 11:29:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-13 11:29:59,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:59,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-07-13 11:29:59,255 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1463540250, now seen corresponding path program 1 times [2022-07-13 11:29:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:59,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739826745] [2022-07-13 11:29:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 11:29:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:29:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-13 11:29:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:29:59,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739826745] [2022-07-13 11:29:59,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739826745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:59,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:29:59,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 11:29:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040886822] [2022-07-13 11:29:59,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:59,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:29:59,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:29:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:59,343 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 11:29:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:59,536 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2022-07-13 11:29:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:29:59,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2022-07-13 11:29:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:59,537 INFO L225 Difference]: With dead ends: 201 [2022-07-13 11:29:59,537 INFO L226 Difference]: Without dead ends: 153 [2022-07-13 11:29:59,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-07-13 11:29:59,538 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 136 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:59,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 952 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:29:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-13 11:29:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2022-07-13 11:29:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 117 states have internal predecessors, (135), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-13 11:29:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2022-07-13 11:29:59,551 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 86 [2022-07-13 11:29:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:59,551 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2022-07-13 11:29:59,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 11:29:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2022-07-13 11:29:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 11:29:59,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:59,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-13 11:29:59,552 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1416419599, now seen corresponding path program 1 times [2022-07-13 11:29:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:29:59,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730776385] [2022-07-13 11:29:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:29:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 11:29:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:29:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:29:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:29:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:29:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:29:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 11:29:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 11:29:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:29:59,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:29:59,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730776385] [2022-07-13 11:29:59,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730776385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:29:59,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875194362] [2022-07-13 11:29:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:29:59,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:29:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:29:59,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:29:59,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:29:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:29:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:29:59,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 11:29:59,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:29:59,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875194362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:29:59,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:29:59,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-13 11:29:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705698817] [2022-07-13 11:29:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:29:59,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:29:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:29:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:29:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:59,804 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:29:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:59,823 INFO L93 Difference]: Finished difference Result 205 states and 238 transitions. [2022-07-13 11:29:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:29:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-07-13 11:29:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:59,824 INFO L225 Difference]: With dead ends: 205 [2022-07-13 11:29:59,824 INFO L226 Difference]: Without dead ends: 170 [2022-07-13 11:29:59,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:29:59,824 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 16 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:59,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 236 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:29:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-13 11:29:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2022-07-13 11:29:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.152) internal successors, (144), 125 states have internal predecessors, (144), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-13 11:29:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2022-07-13 11:29:59,837 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 103 [2022-07-13 11:29:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:59,837 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2022-07-13 11:29:59,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:29:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2022-07-13 11:29:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 11:29:59,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:59,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:59,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 11:30:00,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-07-13 11:30:00,057 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash -479392400, now seen corresponding path program 1 times [2022-07-13 11:30:00,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:30:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71611650] [2022-07-13 11:30:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:30:00,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:30:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 11:30:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:30:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:30:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:30:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:30:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 11:30:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 11:30:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:30:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:30:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71611650] [2022-07-13 11:30:00,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71611650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:30:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972604232] [2022-07-13 11:30:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:30:00,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:30:00,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:30:00,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:30:00,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:30:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 11:30:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 11:30:00,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:30:00,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972604232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:30:00,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:30:00,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-13 11:30:00,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100317499] [2022-07-13 11:30:00,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:30:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:30:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:30:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:30:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:30:00,275 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:30:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:00,299 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2022-07-13 11:30:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:30:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-07-13 11:30:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:00,300 INFO L225 Difference]: With dead ends: 203 [2022-07-13 11:30:00,300 INFO L226 Difference]: Without dead ends: 170 [2022-07-13 11:30:00,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:30:00,300 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:00,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 255 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:30:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-13 11:30:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2022-07-13 11:30:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.12) internal successors, (140), 125 states have internal predecessors, (140), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-13 11:30:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2022-07-13 11:30:00,315 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 103 [2022-07-13 11:30:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:00,316 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2022-07-13 11:30:00,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:30:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2022-07-13 11:30:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 11:30:00,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:00,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:30:00,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:30:00,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:30:00,529 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash 506808435, now seen corresponding path program 1 times [2022-07-13 11:30:00,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:30:00,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112462815] [2022-07-13 11:30:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:30:00,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:30:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 11:30:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 11:30:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:30:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:30:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:30:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 11:30:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 11:30:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 11:30:00,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:30:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112462815] [2022-07-13 11:30:00,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112462815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:30:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978783133] [2022-07-13 11:30:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:30:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:30:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:30:00,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:30:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:30:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 11:30:00,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:30:00,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:30:00,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978783133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:30:00,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 11:30:00,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-07-13 11:30:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700380610] [2022-07-13 11:30:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:30:00,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:30:00,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:30:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:30:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:30:00,785 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 11:30:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:00,864 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2022-07-13 11:30:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:30:00,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2022-07-13 11:30:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:00,865 INFO L225 Difference]: With dead ends: 283 [2022-07-13 11:30:00,865 INFO L226 Difference]: Without dead ends: 151 [2022-07-13 11:30:00,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:30:00,866 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 144 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:00,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 214 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:30:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-13 11:30:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-07-13 11:30:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.104) internal successors, (138), 125 states have internal predecessors, (138), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-13 11:30:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-07-13 11:30:00,891 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 103 [2022-07-13 11:30:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:00,891 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-07-13 11:30:00,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 11:30:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-07-13 11:30:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 11:30:00,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:00,892 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:30:00,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:30:01,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:30:01,110 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:01,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1772033550, now seen corresponding path program 1 times [2022-07-13 11:30:01,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:30:01,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812447010] [2022-07-13 11:30:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:30:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:30:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 11:30:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:30:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:30:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:30:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:30:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 11:30:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 11:30:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:30:01,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:30:01,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812447010] [2022-07-13 11:30:01,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812447010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:30:01,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:30:01,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 11:30:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277855679] [2022-07-13 11:30:01,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:30:01,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 11:30:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:30:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 11:30:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:30:01,209 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:30:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:01,493 INFO L93 Difference]: Finished difference Result 300 states and 328 transitions. [2022-07-13 11:30:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 11:30:01,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2022-07-13 11:30:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:01,494 INFO L225 Difference]: With dead ends: 300 [2022-07-13 11:30:01,494 INFO L226 Difference]: Without dead ends: 151 [2022-07-13 11:30:01,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:30:01,495 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 167 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:01,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 639 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:30:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-13 11:30:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-07-13 11:30:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.096) internal successors, (137), 125 states have internal predecessors, (137), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-13 11:30:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2022-07-13 11:30:01,509 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 104 [2022-07-13 11:30:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:01,509 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2022-07-13 11:30:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:30:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2022-07-13 11:30:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 11:30:01,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:01,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:30:01,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-13 11:30:01,510 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash 125463216, now seen corresponding path program 1 times [2022-07-13 11:30:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:30:01,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484852364] [2022-07-13 11:30:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:30:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:30:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 11:30:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 11:30:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 11:30:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 11:30:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 11:30:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 11:30:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 11:30:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 11:30:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 11:30:01,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:30:01,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484852364] [2022-07-13 11:30:01,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484852364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:30:01,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:30:01,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 11:30:01,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300294703] [2022-07-13 11:30:01,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:30:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:30:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:30:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:30:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:30:01,614 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:30:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:01,859 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2022-07-13 11:30:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:30:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2022-07-13 11:30:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:01,859 INFO L225 Difference]: With dead ends: 151 [2022-07-13 11:30:01,859 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 11:30:01,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-07-13 11:30:01,860 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 190 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:01,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 548 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 11:30:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 11:30:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 11:30:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:30:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 11:30:01,861 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2022-07-13 11:30:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:01,861 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 11:30:01,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 11:30:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 11:30:01,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 11:30:01,863 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 11:30:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-07-13 11:30:01,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.