/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:10:02,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:10:02,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:10:02,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 04:10:02,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 04:10:02,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 04:10:02,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 04:10:02,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 04:10:02,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 04:10:02,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 04:10:02,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 04:10:02,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 04:10:02,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:10:02,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:10:02,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:10:02,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:10:02,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:10:02,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:10:02,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:10:02,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:10:02,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:10:02,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:10:02,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:10:02,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:10:02,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 04:10:02,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 04:10:02,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 04:10:02,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 04:10:02,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 04:10:02,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 04:10:02,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 04:10:02,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 04:10:02,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 04:10:02,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 04:10:02,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 04:10:02,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 04:10:02,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 04:10:02,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 04:10:02,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:10:02,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:10:02,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:10:02,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:10:02,703 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:10:02,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:10:02,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:10:02,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:10:02,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:10:02,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:10:02,705 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:10:02,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:10:02,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:10:02,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:10:02,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:10:02,931 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:10:02,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-02-15 04:10:02,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07793ea73/2b95d812951145d69c11cc6455878314/FLAGc4534a9d1 [2022-02-15 04:10:03,415 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:10:03,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-02-15 04:10:03,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07793ea73/2b95d812951145d69c11cc6455878314/FLAGc4534a9d1 [2022-02-15 04:10:03,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07793ea73/2b95d812951145d69c11cc6455878314 [2022-02-15 04:10:03,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:10:03,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:10:03,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:10:03,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:10:03,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:10:03,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5397c472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03, skipping insertion in model container [2022-02-15 04:10:03,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:10:03,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:10:03,732 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-02-15 04:10:03,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:10:03,743 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:10:03,800 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-02-15 04:10:03,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:10:03,812 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:10:03,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03 WrapperNode [2022-02-15 04:10:03,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:10:03,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:10:03,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:10:03,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:10:03,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:10:03,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:10:03,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:10:03,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:10:03,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:10:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:10:03,935 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) [2022-02-15 04:10:03,957 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 [2022-02-15 04:10:03,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:10:03,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:10:03,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:10:03,968 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-15 04:10:03,968 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-15 04:10:03,968 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-15 04:10:03,968 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-15 04:10:03,969 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-15 04:10:03,969 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-15 04:10:03,969 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-15 04:10:03,969 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-15 04:10:03,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-15 04:10:03,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:10:03,970 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-15 04:10:03,970 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-15 04:10:03,970 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-15 04:10:03,970 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-15 04:10:03,971 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-15 04:10:03,972 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-15 04:10:03,973 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-15 04:10:03,973 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-15 04:10:03,973 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-15 04:10:03,973 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-15 04:10:03,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-15 04:10:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-15 04:10:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-15 04:10:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-02-15 04:10:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-02-15 04:10:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-02-15 04:10:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-02-15 04:10:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-15 04:10:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-15 04:10:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:10:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:10:03,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:10:03,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:10:03,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:10:03,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:10:04,208 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:10:04,209 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:10:04,251 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,280 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,281 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,296 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,309 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,310 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,316 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,480 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-15 04:10:04,480 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-15 04:10:04,481 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,536 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-02-15 04:10:04,536 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-02-15 04:10:04,553 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,561 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-15 04:10:04,562 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-15 04:10:04,613 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,618 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,618 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,619 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,622 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,623 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,623 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,629 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,629 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,670 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,698 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-15 04:10:04,698 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-15 04:10:04,699 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,765 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-02-15 04:10:04,765 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-02-15 04:10:04,802 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,805 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,805 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,805 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,815 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,815 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,816 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,821 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,821 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,834 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:10:04,847 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:10:04,847 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:10:04,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:10:04 BoogieIcfgContainer [2022-02-15 04:10:04,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:10:04,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:10:04,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:10:04,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:10:04,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:10:03" (1/3) ... [2022-02-15 04:10:04,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aaf3e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:10:04, skipping insertion in model container [2022-02-15 04:10:04,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03" (2/3) ... [2022-02-15 04:10:04,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aaf3e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:10:04, skipping insertion in model container [2022-02-15 04:10:04,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:10:04" (3/3) ... [2022-02-15 04:10:04,858 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2022-02-15 04:10:04,862 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:10:04,862 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:10:04,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:10:04,909 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=QVASR [2022-02-15 04:10:04,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:10:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2022-02-15 04:10:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 04:10:04,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:04,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:04,954 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:04,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 1 times [2022-02-15 04:10:04,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:04,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355788203] [2022-02-15 04:10:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:04,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:05,017 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:05,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:05,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355788203] [2022-02-15 04:10:05,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355788203] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:05,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:05,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 04:10:05,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052854655] [2022-02-15 04:10:05,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:05,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 04:10:05,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 04:10:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:10:05,428 INFO L87 Difference]: Start difference. First operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 04:10:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:06,588 INFO L93 Difference]: Finished difference Result 666 states and 978 transitions. [2022-02-15 04:10:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 04:10:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-15 04:10:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:06,609 INFO L225 Difference]: With dead ends: 666 [2022-02-15 04:10:06,610 INFO L226 Difference]: Without dead ends: 422 [2022-02-15 04:10:06,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:10:06,617 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 408 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:06,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 735 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-15 04:10:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2022-02-15 04:10:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 282 states have (on average 1.429078014184397) internal successors, (403), 306 states have internal predecessors, (403), 71 states have call successors, (71), 28 states have call predecessors, (71), 26 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-15 04:10:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 523 transitions. [2022-02-15 04:10:06,712 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 523 transitions. Word has length 20 [2022-02-15 04:10:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:06,713 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 523 transitions. [2022-02-15 04:10:06,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 04:10:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 523 transitions. [2022-02-15 04:10:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:10:06,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:06,715 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:06,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:10:06,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 1 times [2022-02-15 04:10:06,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:06,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877005363] [2022-02-15 04:10:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:06,723 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:06,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:06,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877005363] [2022-02-15 04:10:06,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [877005363] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:06,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:06,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:06,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609092560] [2022-02-15 04:10:06,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:06,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:06,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:06,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:06,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:06,905 INFO L87 Difference]: Start difference. First operand 380 states and 523 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:08,525 INFO L93 Difference]: Finished difference Result 747 states and 1022 transitions. [2022-02-15 04:10:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:08,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-02-15 04:10:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:08,531 INFO L225 Difference]: With dead ends: 747 [2022-02-15 04:10:08,532 INFO L226 Difference]: Without dead ends: 584 [2022-02-15 04:10:08,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:08,536 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 650 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:08,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 914 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 04:10:08,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-15 04:10:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 525. [2022-02-15 04:10:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.3530864197530865) internal successors, (548), 410 states have internal predecessors, (548), 78 states have call successors, (78), 41 states have call predecessors, (78), 41 states have return successors, (90), 75 states have call predecessors, (90), 66 states have call successors, (90) [2022-02-15 04:10:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 716 transitions. [2022-02-15 04:10:08,601 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 716 transitions. Word has length 25 [2022-02-15 04:10:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:08,601 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 716 transitions. [2022-02-15 04:10:08,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 716 transitions. [2022-02-15 04:10:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:10:08,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:08,602 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:08,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:10:08,603 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 1 times [2022-02-15 04:10:08,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:08,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843290130] [2022-02-15 04:10:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:08,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:08,608 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:08,775 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:08,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843290130] [2022-02-15 04:10:08,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [843290130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:08,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:08,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:08,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435942142] [2022-02-15 04:10:08,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:08,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:08,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:08,777 INFO L87 Difference]: Start difference. First operand 525 states and 716 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:09,719 INFO L93 Difference]: Finished difference Result 695 states and 934 transitions. [2022-02-15 04:10:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-02-15 04:10:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:09,723 INFO L225 Difference]: With dead ends: 695 [2022-02-15 04:10:09,723 INFO L226 Difference]: Without dead ends: 676 [2022-02-15 04:10:09,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:09,725 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 758 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:09,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 604 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-15 04:10:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 583. [2022-02-15 04:10:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 450 states have (on average 1.3488888888888888) internal successors, (607), 463 states have internal predecessors, (607), 82 states have call successors, (82), 46 states have call predecessors, (82), 50 states have return successors, (101), 78 states have call predecessors, (101), 72 states have call successors, (101) [2022-02-15 04:10:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 790 transitions. [2022-02-15 04:10:09,782 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 790 transitions. Word has length 31 [2022-02-15 04:10:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:09,782 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 790 transitions. [2022-02-15 04:10:09,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 790 transitions. [2022-02-15 04:10:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:10:09,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:09,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:09,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:10:09,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 1 times [2022-02-15 04:10:09,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:09,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480908800] [2022-02-15 04:10:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:09,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:09,788 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:09,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:09,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480908800] [2022-02-15 04:10:09,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480908800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:09,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:09,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:09,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226717774] [2022-02-15 04:10:09,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:09,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:09,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:09,912 INFO L87 Difference]: Start difference. First operand 583 states and 790 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:10,884 INFO L93 Difference]: Finished difference Result 1117 states and 1501 transitions. [2022-02-15 04:10:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:10,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-02-15 04:10:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:10,888 INFO L225 Difference]: With dead ends: 1117 [2022-02-15 04:10:10,888 INFO L226 Difference]: Without dead ends: 819 [2022-02-15 04:10:10,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:10,890 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 832 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:10,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 761 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-02-15 04:10:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 771. [2022-02-15 04:10:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 606 states have (on average 1.33993399339934) internal successors, (812), 616 states have internal predecessors, (812), 99 states have call successors, (99), 61 states have call predecessors, (99), 65 states have return successors, (136), 97 states have call predecessors, (136), 91 states have call successors, (136) [2022-02-15 04:10:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1047 transitions. [2022-02-15 04:10:10,968 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1047 transitions. Word has length 33 [2022-02-15 04:10:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:10,968 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1047 transitions. [2022-02-15 04:10:10,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1047 transitions. [2022-02-15 04:10:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 04:10:10,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:10,969 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:10,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:10:10,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 1 times [2022-02-15 04:10:10,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:10,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002066069] [2022-02-15 04:10:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:10,972 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:11,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:11,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002066069] [2022-02-15 04:10:11,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002066069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:11,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:11,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:11,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015768942] [2022-02-15 04:10:11,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:11,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:11,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:11,104 INFO L87 Difference]: Start difference. First operand 771 states and 1047 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:12,174 INFO L93 Difference]: Finished difference Result 865 states and 1163 transitions. [2022-02-15 04:10:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2022-02-15 04:10:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:12,178 INFO L225 Difference]: With dead ends: 865 [2022-02-15 04:10:12,178 INFO L226 Difference]: Without dead ends: 860 [2022-02-15 04:10:12,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:12,179 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 712 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:12,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 892 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-02-15 04:10:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 808. [2022-02-15 04:10:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 636 states have (on average 1.3333333333333333) internal successors, (848), 648 states have internal predecessors, (848), 99 states have call successors, (99), 61 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-15 04:10:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1090 transitions. [2022-02-15 04:10:12,232 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1090 transitions. Word has length 38 [2022-02-15 04:10:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:12,233 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 1090 transitions. [2022-02-15 04:10:12,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1090 transitions. [2022-02-15 04:10:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 04:10:12,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:12,234 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:12,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:10:12,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 1 times [2022-02-15 04:10:12,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:12,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847412170] [2022-02-15 04:10:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:12,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:12,237 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:12,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:12,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847412170] [2022-02-15 04:10:12,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1847412170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:12,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:12,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:12,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143386089] [2022-02-15 04:10:12,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:12,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:12,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:12,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:12,372 INFO L87 Difference]: Start difference. First operand 808 states and 1090 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:13,299 INFO L93 Difference]: Finished difference Result 842 states and 1132 transitions. [2022-02-15 04:10:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:13,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-02-15 04:10:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:13,307 INFO L225 Difference]: With dead ends: 842 [2022-02-15 04:10:13,307 INFO L226 Difference]: Without dead ends: 839 [2022-02-15 04:10:13,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 04:10:13,309 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 320 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:13,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 720 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-02-15 04:10:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 819. [2022-02-15 04:10:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3323029366306027) internal successors, (862), 658 states have internal predecessors, (862), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-15 04:10:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1104 transitions. [2022-02-15 04:10:13,364 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1104 transitions. Word has length 38 [2022-02-15 04:10:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:13,364 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1104 transitions. [2022-02-15 04:10:13,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1104 transitions. [2022-02-15 04:10:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 04:10:13,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:13,366 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:13,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:10:13,366 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:13,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 1 times [2022-02-15 04:10:13,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:13,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228707391] [2022-02-15 04:10:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:13,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:13,368 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 04:10:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:13,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:13,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228707391] [2022-02-15 04:10:13,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1228707391] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:13,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:13,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:13,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807346704] [2022-02-15 04:10:13,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:13,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:13,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:13,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:13,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:13,555 INFO L87 Difference]: Start difference. First operand 819 states and 1104 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:15,305 INFO L93 Difference]: Finished difference Result 877 states and 1176 transitions. [2022-02-15 04:10:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:15,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-02-15 04:10:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:15,310 INFO L225 Difference]: With dead ends: 877 [2022-02-15 04:10:15,310 INFO L226 Difference]: Without dead ends: 871 [2022-02-15 04:10:15,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-15 04:10:15,312 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1023 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:15,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1188 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 04:10:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-02-15 04:10:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-02-15 04:10:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.330757341576507) internal successors, (861), 658 states have internal predecessors, (861), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-15 04:10:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1103 transitions. [2022-02-15 04:10:15,408 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1103 transitions. Word has length 40 [2022-02-15 04:10:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:15,409 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1103 transitions. [2022-02-15 04:10:15,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1103 transitions. [2022-02-15 04:10:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 04:10:15,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:15,410 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:15,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 04:10:15,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 1 times [2022-02-15 04:10:15,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:15,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454612645] [2022-02-15 04:10:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:15,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:15,414 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 04:10:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:15,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:15,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454612645] [2022-02-15 04:10:15,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [454612645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:15,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:15,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:15,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536469348] [2022-02-15 04:10:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:15,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:15,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:15,619 INFO L87 Difference]: Start difference. First operand 819 states and 1103 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:16,880 INFO L93 Difference]: Finished difference Result 877 states and 1175 transitions. [2022-02-15 04:10:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-02-15 04:10:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:16,883 INFO L225 Difference]: With dead ends: 877 [2022-02-15 04:10:16,883 INFO L226 Difference]: Without dead ends: 871 [2022-02-15 04:10:16,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-15 04:10:16,884 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 1279 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:16,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 928 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-02-15 04:10:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-02-15 04:10:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3292117465224111) internal successors, (860), 658 states have internal predecessors, (860), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-15 04:10:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1102 transitions. [2022-02-15 04:10:16,952 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1102 transitions. Word has length 41 [2022-02-15 04:10:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:16,953 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1102 transitions. [2022-02-15 04:10:16,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1102 transitions. [2022-02-15 04:10:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 04:10:16,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:16,953 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:16,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 04:10:16,954 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 1 times [2022-02-15 04:10:16,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:16,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659044889] [2022-02-15 04:10:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:16,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:16,956 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 04:10:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:17,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:17,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659044889] [2022-02-15 04:10:17,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [659044889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:17,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:17,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:17,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083963865] [2022-02-15 04:10:17,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:17,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:17,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:17,076 INFO L87 Difference]: Start difference. First operand 819 states and 1102 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:18,092 INFO L93 Difference]: Finished difference Result 882 states and 1180 transitions. [2022-02-15 04:10:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 04:10:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-02-15 04:10:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:18,096 INFO L225 Difference]: With dead ends: 882 [2022-02-15 04:10:18,096 INFO L226 Difference]: Without dead ends: 867 [2022-02-15 04:10:18,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:18,099 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 539 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:18,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1451 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-02-15 04:10:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-02-15 04:10:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 646 states have (on average 1.328173374613003) internal successors, (858), 657 states have internal predecessors, (858), 98 states have call successors, (98), 62 states have call predecessors, (98), 72 states have return successors, (142), 99 states have call predecessors, (142), 90 states have call successors, (142) [2022-02-15 04:10:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1098 transitions. [2022-02-15 04:10:18,171 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1098 transitions. Word has length 42 [2022-02-15 04:10:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:18,171 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1098 transitions. [2022-02-15 04:10:18,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1098 transitions. [2022-02-15 04:10:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 04:10:18,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:18,172 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:18,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 04:10:18,172 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 1 times [2022-02-15 04:10:18,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:18,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434219645] [2022-02-15 04:10:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:18,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:18,177 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:18,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:18,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:18,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:18,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:18,324 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:18,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434219645] [2022-02-15 04:10:18,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [434219645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:18,324 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:18,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:18,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833605975] [2022-02-15 04:10:18,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:18,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:18,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:18,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:18,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:18,325 INFO L87 Difference]: Start difference. First operand 817 states and 1098 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:19,345 INFO L93 Difference]: Finished difference Result 880 states and 1176 transitions. [2022-02-15 04:10:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 04:10:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-02-15 04:10:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:19,349 INFO L225 Difference]: With dead ends: 880 [2022-02-15 04:10:19,349 INFO L226 Difference]: Without dead ends: 860 [2022-02-15 04:10:19,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:19,350 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 734 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:19,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1283 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-02-15 04:10:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 810. [2022-02-15 04:10:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 642 states have (on average 1.3286604361370717) internal successors, (853), 653 states have internal predecessors, (853), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-02-15 04:10:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1089 transitions. [2022-02-15 04:10:19,417 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1089 transitions. Word has length 41 [2022-02-15 04:10:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:19,417 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1089 transitions. [2022-02-15 04:10:19,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1089 transitions. [2022-02-15 04:10:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 04:10:19,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:19,418 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:19,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 04:10:19,418 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 1 times [2022-02-15 04:10:19,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:19,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211713458] [2022-02-15 04:10:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:19,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:19,420 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:19,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:19,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211713458] [2022-02-15 04:10:19,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211713458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:19,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:19,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:19,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692703808] [2022-02-15 04:10:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:19,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:19,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:19,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:19,565 INFO L87 Difference]: Start difference. First operand 810 states and 1089 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:20,861 INFO L93 Difference]: Finished difference Result 857 states and 1144 transitions. [2022-02-15 04:10:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 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 42 [2022-02-15 04:10:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:20,879 INFO L225 Difference]: With dead ends: 857 [2022-02-15 04:10:20,879 INFO L226 Difference]: Without dead ends: 835 [2022-02-15 04:10:20,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:20,880 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 235 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:20,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1014 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 04:10:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-15 04:10:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 812. [2022-02-15 04:10:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 644 states have (on average 1.3276397515527951) internal successors, (855), 655 states have internal predecessors, (855), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-02-15 04:10:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1091 transitions. [2022-02-15 04:10:20,981 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1091 transitions. Word has length 42 [2022-02-15 04:10:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:20,981 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1091 transitions. [2022-02-15 04:10:20,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1091 transitions. [2022-02-15 04:10:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 04:10:20,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:20,982 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:20,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 04:10:20,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 1 times [2022-02-15 04:10:20,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:20,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022844953] [2022-02-15 04:10:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:20,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:20,986 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 04:10:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:21,121 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:21,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022844953] [2022-02-15 04:10:21,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022844953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:21,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:21,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 04:10:21,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067719857] [2022-02-15 04:10:21,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:21,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 04:10:21,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 04:10:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:10:21,123 INFO L87 Difference]: Start difference. First operand 812 states and 1091 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:22,255 INFO L93 Difference]: Finished difference Result 908 states and 1209 transitions. [2022-02-15 04:10:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:22,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-02-15 04:10:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:22,258 INFO L225 Difference]: With dead ends: 908 [2022-02-15 04:10:22,258 INFO L226 Difference]: Without dead ends: 840 [2022-02-15 04:10:22,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:22,259 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 616 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:22,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 931 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-02-15 04:10:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 816. [2022-02-15 04:10:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-02-15 04:10:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-02-15 04:10:22,338 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 44 [2022-02-15 04:10:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:22,339 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-02-15 04:10:22,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-02-15 04:10:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 04:10:22,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:22,340 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:22,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 04:10:22,340 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 1 times [2022-02-15 04:10:22,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:22,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243958779] [2022-02-15 04:10:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:22,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:22,342 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:22,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:22,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:22,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:22,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243958779] [2022-02-15 04:10:22,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243958779] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:22,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:22,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:22,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539580149] [2022-02-15 04:10:22,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:22,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:22,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:22,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:22,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:22,467 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:23,674 INFO L93 Difference]: Finished difference Result 860 states and 1147 transitions. [2022-02-15 04:10:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 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 43 [2022-02-15 04:10:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:23,677 INFO L225 Difference]: With dead ends: 860 [2022-02-15 04:10:23,677 INFO L226 Difference]: Without dead ends: 838 [2022-02-15 04:10:23,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:23,677 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 293 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:23,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1010 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-02-15 04:10:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 816. [2022-02-15 04:10:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-02-15 04:10:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-02-15 04:10:23,749 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 43 [2022-02-15 04:10:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:23,749 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-02-15 04:10:23,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-02-15 04:10:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 04:10:23,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:23,750 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:23,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 04:10:23,750 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:23,750 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 1 times [2022-02-15 04:10:23,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:23,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203520526] [2022-02-15 04:10:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:23,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:23,752 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 04:10:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:23,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:23,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203520526] [2022-02-15 04:10:23,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [203520526] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:23,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:23,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:23,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566916741] [2022-02-15 04:10:23,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:23,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:23,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:23,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:23,904 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:24,792 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-02-15 04:10:24,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:24,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-02-15 04:10:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:24,795 INFO L225 Difference]: With dead ends: 861 [2022-02-15 04:10:24,795 INFO L226 Difference]: Without dead ends: 843 [2022-02-15 04:10:24,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:24,796 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 632 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:24,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1326 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-02-15 04:10:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 814. [2022-02-15 04:10:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 646 states have (on average 1.325077399380805) internal successors, (856), 657 states have internal predecessors, (856), 95 states have call successors, (95), 61 states have call predecessors, (95), 72 states have return successors, (141), 97 states have call predecessors, (141), 87 states have call successors, (141) [2022-02-15 04:10:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1092 transitions. [2022-02-15 04:10:24,868 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1092 transitions. Word has length 45 [2022-02-15 04:10:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:24,868 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1092 transitions. [2022-02-15 04:10:24,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1092 transitions. [2022-02-15 04:10:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 04:10:24,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:24,869 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:24,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 04:10:24,869 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 1 times [2022-02-15 04:10:24,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:24,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819446968] [2022-02-15 04:10:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:24,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:24,872 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 04:10:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:25,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:25,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819446968] [2022-02-15 04:10:25,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819446968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:25,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:25,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:25,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64968728] [2022-02-15 04:10:25,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:25,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:25,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:25,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:25,003 INFO L87 Difference]: Start difference. First operand 814 states and 1092 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:26,267 INFO L93 Difference]: Finished difference Result 880 states and 1173 transitions. [2022-02-15 04:10:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 04:10:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-02-15 04:10:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:26,270 INFO L225 Difference]: With dead ends: 880 [2022-02-15 04:10:26,270 INFO L226 Difference]: Without dead ends: 804 [2022-02-15 04:10:26,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:10:26,271 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 336 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:26,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 900 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 04:10:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-15 04:10:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 775. [2022-02-15 04:10:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 616 states have (on average 1.3246753246753247) internal successors, (816), 628 states have internal predecessors, (816), 93 states have call successors, (93), 60 states have call predecessors, (93), 65 states have return successors, (132), 88 states have call predecessors, (132), 85 states have call successors, (132) [2022-02-15 04:10:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-02-15 04:10:26,340 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 46 [2022-02-15 04:10:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:26,340 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-02-15 04:10:26,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-02-15 04:10:26,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 04:10:26,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:26,341 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:26,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 04:10:26,341 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:26,342 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 1 times [2022-02-15 04:10:26,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:26,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403418816] [2022-02-15 04:10:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:26,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:26,343 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 04:10:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:26,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:26,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403418816] [2022-02-15 04:10:26,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403418816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:26,452 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:26,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 04:10:26,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442215331] [2022-02-15 04:10:26,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:26,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 04:10:26,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:26,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 04:10:26,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 04:10:26,453 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:27,837 INFO L93 Difference]: Finished difference Result 1134 states and 1535 transitions. [2022-02-15 04:10:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-02-15 04:10:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:27,841 INFO L225 Difference]: With dead ends: 1134 [2022-02-15 04:10:27,841 INFO L226 Difference]: Without dead ends: 1131 [2022-02-15 04:10:27,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:27,842 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 429 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:27,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 784 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 04:10:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-02-15 04:10:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 888. [2022-02-15 04:10:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 707 states have (on average 1.3295615275813295) internal successors, (940), 721 states have internal predecessors, (940), 103 states have call successors, (103), 70 states have call predecessors, (103), 77 states have return successors, (152), 98 states have call predecessors, (152), 95 states have call successors, (152) [2022-02-15 04:10:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1195 transitions. [2022-02-15 04:10:27,929 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1195 transitions. Word has length 47 [2022-02-15 04:10:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:27,929 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1195 transitions. [2022-02-15 04:10:27,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1195 transitions. [2022-02-15 04:10:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 04:10:27,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:27,930 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:27,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 04:10:27,931 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:27,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 1 times [2022-02-15 04:10:27,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:27,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186366436] [2022-02-15 04:10:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:27,933 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:10:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:28,063 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:28,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186366436] [2022-02-15 04:10:28,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [186366436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:28,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:28,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:28,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260048167] [2022-02-15 04:10:28,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:28,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:28,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:28,064 INFO L87 Difference]: Start difference. First operand 888 states and 1195 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:29,060 INFO L93 Difference]: Finished difference Result 933 states and 1248 transitions. [2022-02-15 04:10:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 04:10:29,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-02-15 04:10:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:29,063 INFO L225 Difference]: With dead ends: 933 [2022-02-15 04:10:29,064 INFO L226 Difference]: Without dead ends: 915 [2022-02-15 04:10:29,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:29,064 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 404 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:29,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 1281 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-02-15 04:10:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 886. [2022-02-15 04:10:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 706 states have (on average 1.3286118980169972) internal successors, (938), 720 states have internal predecessors, (938), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-02-15 04:10:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1191 transitions. [2022-02-15 04:10:29,150 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1191 transitions. Word has length 47 [2022-02-15 04:10:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:29,150 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1191 transitions. [2022-02-15 04:10:29,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1191 transitions. [2022-02-15 04:10:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 04:10:29,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:29,152 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:29,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 04:10:29,152 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 1 times [2022-02-15 04:10:29,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:29,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616956108] [2022-02-15 04:10:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:29,154 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 04:10:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:29,334 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:29,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616956108] [2022-02-15 04:10:29,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616956108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:29,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:29,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:29,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355589686] [2022-02-15 04:10:29,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:29,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:29,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:29,334 INFO L87 Difference]: Start difference. First operand 886 states and 1191 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-15 04:10:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:30,877 INFO L93 Difference]: Finished difference Result 1483 states and 1950 transitions. [2022-02-15 04:10:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:30,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-02-15 04:10:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:30,881 INFO L225 Difference]: With dead ends: 1483 [2022-02-15 04:10:30,881 INFO L226 Difference]: Without dead ends: 936 [2022-02-15 04:10:30,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-15 04:10:30,883 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1791 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:30,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 859 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 04:10:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-02-15 04:10:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 877. [2022-02-15 04:10:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 697 states have (on average 1.3156384505021521) internal successors, (917), 711 states have internal predecessors, (917), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-02-15 04:10:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1170 transitions. [2022-02-15 04:10:30,996 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1170 transitions. Word has length 48 [2022-02-15 04:10:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1170 transitions. [2022-02-15 04:10:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-15 04:10:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1170 transitions. [2022-02-15 04:10:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 04:10:30,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:30,997 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:30,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 04:10:30,998 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 1 times [2022-02-15 04:10:30,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:30,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077229472] [2022-02-15 04:10:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:31,000 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:31,162 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:31,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077229472] [2022-02-15 04:10:31,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077229472] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:31,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:31,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:31,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338067678] [2022-02-15 04:10:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:31,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:31,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:31,163 INFO L87 Difference]: Start difference. First operand 877 states and 1170 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:33,092 INFO L93 Difference]: Finished difference Result 1151 states and 1528 transitions. [2022-02-15 04:10:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 04:10:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-02-15 04:10:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:33,095 INFO L225 Difference]: With dead ends: 1151 [2022-02-15 04:10:33,096 INFO L226 Difference]: Without dead ends: 1075 [2022-02-15 04:10:33,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-02-15 04:10:33,097 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 1331 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:33,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 1405 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 04:10:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-02-15 04:10:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 932. [2022-02-15 04:10:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.3090418353576248) internal successors, (970), 757 states have internal predecessors, (970), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-02-15 04:10:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1243 transitions. [2022-02-15 04:10:33,225 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1243 transitions. Word has length 50 [2022-02-15 04:10:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:33,225 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1243 transitions. [2022-02-15 04:10:33,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1243 transitions. [2022-02-15 04:10:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 04:10:33,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:33,226 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:33,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 04:10:33,226 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 1 times [2022-02-15 04:10:33,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:33,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785571759] [2022-02-15 04:10:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:33,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:33,229 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:10:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:33,386 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:33,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785571759] [2022-02-15 04:10:33,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785571759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:33,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:33,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 04:10:33,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475243188] [2022-02-15 04:10:33,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:33,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 04:10:33,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 04:10:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-15 04:10:33,387 INFO L87 Difference]: Start difference. First operand 932 states and 1243 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:34,349 INFO L93 Difference]: Finished difference Result 979 states and 1296 transitions. [2022-02-15 04:10:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:34,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-02-15 04:10:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:34,354 INFO L225 Difference]: With dead ends: 979 [2022-02-15 04:10:34,354 INFO L226 Difference]: Without dead ends: 959 [2022-02-15 04:10:34,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:34,354 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 779 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:34,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1355 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-15 04:10:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 932. [2022-02-15 04:10:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.2928475033738192) internal successors, (958), 757 states have internal predecessors, (958), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-02-15 04:10:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1231 transitions. [2022-02-15 04:10:34,456 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1231 transitions. Word has length 50 [2022-02-15 04:10:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:34,456 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1231 transitions. [2022-02-15 04:10:34,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1231 transitions. [2022-02-15 04:10:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 04:10:34,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:34,457 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:34,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 04:10:34,458 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:34,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 1 times [2022-02-15 04:10:34,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:34,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959067712] [2022-02-15 04:10:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:34,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:34,460 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:10:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:34,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:34,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959067712] [2022-02-15 04:10:34,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959067712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:34,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:34,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:34,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528421181] [2022-02-15 04:10:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:34,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:34,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:34,581 INFO L87 Difference]: Start difference. First operand 932 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 04:10:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:35,704 INFO L93 Difference]: Finished difference Result 1041 states and 1345 transitions. [2022-02-15 04:10:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 04:10:35,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-02-15 04:10:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:35,706 INFO L225 Difference]: With dead ends: 1041 [2022-02-15 04:10:35,706 INFO L226 Difference]: Without dead ends: 685 [2022-02-15 04:10:35,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:35,707 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 692 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:35,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 831 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-02-15 04:10:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 623. [2022-02-15 04:10:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 498 states have (on average 1.2751004016064258) internal successors, (635), 509 states have internal predecessors, (635), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 68 states have call predecessors, (85), 63 states have call successors, (85) [2022-02-15 04:10:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 791 transitions. [2022-02-15 04:10:35,800 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 791 transitions. Word has length 52 [2022-02-15 04:10:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:35,801 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 791 transitions. [2022-02-15 04:10:35,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 04:10:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 791 transitions. [2022-02-15 04:10:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 04:10:35,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:35,802 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:35,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 04:10:35,802 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 1 times [2022-02-15 04:10:35,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:35,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210280639] [2022-02-15 04:10:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:35,804 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:35,945 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:35,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210280639] [2022-02-15 04:10:35,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210280639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:35,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:35,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 04:10:35,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740327780] [2022-02-15 04:10:35,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:35,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 04:10:35,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 04:10:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-15 04:10:35,946 INFO L87 Difference]: Start difference. First operand 623 states and 791 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:37,239 INFO L93 Difference]: Finished difference Result 681 states and 860 transitions. [2022-02-15 04:10:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:37,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2022-02-15 04:10:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:37,242 INFO L225 Difference]: With dead ends: 681 [2022-02-15 04:10:37,242 INFO L226 Difference]: Without dead ends: 659 [2022-02-15 04:10:37,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:10:37,243 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 782 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:37,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1006 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-15 04:10:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 624. [2022-02-15 04:10:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 499 states have (on average 1.2745490981963927) internal successors, (636), 509 states have internal predecessors, (636), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-02-15 04:10:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 792 transitions. [2022-02-15 04:10:37,322 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 792 transitions. Word has length 51 [2022-02-15 04:10:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:37,322 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 792 transitions. [2022-02-15 04:10:37,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 792 transitions. [2022-02-15 04:10:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 04:10:37,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:37,323 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:37,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 04:10:37,323 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 1 times [2022-02-15 04:10:37,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:37,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784454034] [2022-02-15 04:10:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:37,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:37,325 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:37,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:37,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784454034] [2022-02-15 04:10:37,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784454034] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:37,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:37,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 04:10:37,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220785822] [2022-02-15 04:10:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:37,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 04:10:37,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 04:10:37,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-15 04:10:37,467 INFO L87 Difference]: Start difference. First operand 624 states and 792 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:38,532 INFO L93 Difference]: Finished difference Result 676 states and 851 transitions. [2022-02-15 04:10:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-02-15 04:10:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:38,534 INFO L225 Difference]: With dead ends: 676 [2022-02-15 04:10:38,534 INFO L226 Difference]: Without dead ends: 648 [2022-02-15 04:10:38,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:10:38,535 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 399 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:38,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1402 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-02-15 04:10:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 616. [2022-02-15 04:10:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 491 states have (on average 1.2688391038696538) internal successors, (623), 501 states have internal predecessors, (623), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-02-15 04:10:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 779 transitions. [2022-02-15 04:10:38,617 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 779 transitions. Word has length 51 [2022-02-15 04:10:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 779 transitions. [2022-02-15 04:10:38,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 779 transitions. [2022-02-15 04:10:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 04:10:38,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:38,619 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 04:10:38,619 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 1 times [2022-02-15 04:10:38,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:38,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472913800] [2022-02-15 04:10:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:38,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:38,621 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:38,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:38,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472913800] [2022-02-15 04:10:38,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472913800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:38,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:38,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:38,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049120078] [2022-02-15 04:10:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:38,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:38,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:38,737 INFO L87 Difference]: Start difference. First operand 616 states and 779 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:39,759 INFO L93 Difference]: Finished difference Result 865 states and 1111 transitions. [2022-02-15 04:10:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:39,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2022-02-15 04:10:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:39,774 INFO L225 Difference]: With dead ends: 865 [2022-02-15 04:10:39,774 INFO L226 Difference]: Without dead ends: 832 [2022-02-15 04:10:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:39,775 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 539 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:39,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 927 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-15 04:10:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 659. [2022-02-15 04:10:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 527 states have (on average 1.2580645161290323) internal successors, (663), 530 states have internal predecessors, (663), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-02-15 04:10:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 833 transitions. [2022-02-15 04:10:39,875 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 833 transitions. Word has length 52 [2022-02-15 04:10:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:39,876 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 833 transitions. [2022-02-15 04:10:39,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 833 transitions. [2022-02-15 04:10:39,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 04:10:39,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:39,877 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:39,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 04:10:39,877 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 1 times [2022-02-15 04:10:39,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:39,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091343118] [2022-02-15 04:10:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:39,879 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:40,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:40,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091343118] [2022-02-15 04:10:40,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091343118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:40,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:40,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:40,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691976467] [2022-02-15 04:10:40,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:40,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:40,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:40,072 INFO L87 Difference]: Start difference. First operand 659 states and 833 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:41,039 INFO L93 Difference]: Finished difference Result 1092 states and 1408 transitions. [2022-02-15 04:10:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 04:10:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 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 52 [2022-02-15 04:10:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:41,042 INFO L225 Difference]: With dead ends: 1092 [2022-02-15 04:10:41,042 INFO L226 Difference]: Without dead ends: 714 [2022-02-15 04:10:41,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:41,043 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 1420 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:41,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 867 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-15 04:10:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 666. [2022-02-15 04:10:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 534 states have (on average 1.2602996254681649) internal successors, (673), 537 states have internal predecessors, (673), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-02-15 04:10:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 843 transitions. [2022-02-15 04:10:41,146 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 843 transitions. Word has length 52 [2022-02-15 04:10:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:41,146 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 843 transitions. [2022-02-15 04:10:41,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 843 transitions. [2022-02-15 04:10:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 04:10:41,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:41,147 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:41,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 04:10:41,147 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 1 times [2022-02-15 04:10:41,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:41,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703863981] [2022-02-15 04:10:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:41,149 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:41,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:41,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703863981] [2022-02-15 04:10:41,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703863981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:41,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:41,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:10:41,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785263920] [2022-02-15 04:10:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:41,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:10:41,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:41,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:10:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:41,327 INFO L87 Difference]: Start difference. First operand 666 states and 843 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:42,708 INFO L93 Difference]: Finished difference Result 731 states and 921 transitions. [2022-02-15 04:10:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:10:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-02-15 04:10:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:42,710 INFO L225 Difference]: With dead ends: 731 [2022-02-15 04:10:42,710 INFO L226 Difference]: Without dead ends: 610 [2022-02-15 04:10:42,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:10:42,711 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 1244 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:42,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 1048 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-15 04:10:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 575. [2022-02-15 04:10:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 455 states have (on average 1.2747252747252746) internal successors, (580), 465 states have internal predecessors, (580), 69 states have call successors, (69), 44 states have call predecessors, (69), 50 states have return successors, (82), 66 states have call predecessors, (82), 61 states have call successors, (82) [2022-02-15 04:10:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 731 transitions. [2022-02-15 04:10:42,808 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 731 transitions. Word has length 52 [2022-02-15 04:10:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:42,808 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 731 transitions. [2022-02-15 04:10:42,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 731 transitions. [2022-02-15 04:10:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 04:10:42,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:42,809 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:42,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 04:10:42,809 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 1 times [2022-02-15 04:10:42,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:42,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347912987] [2022-02-15 04:10:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:42,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:42,813 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:42,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:42,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347912987] [2022-02-15 04:10:42,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347912987] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:42,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:42,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:10:42,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546330433] [2022-02-15 04:10:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:42,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:10:42,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:10:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:42,981 INFO L87 Difference]: Start difference. First operand 575 states and 731 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:44,130 INFO L93 Difference]: Finished difference Result 609 states and 770 transitions. [2022-02-15 04:10:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:44,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2022-02-15 04:10:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:44,132 INFO L225 Difference]: With dead ends: 609 [2022-02-15 04:10:44,132 INFO L226 Difference]: Without dead ends: 605 [2022-02-15 04:10:44,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:44,133 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 443 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:44,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1585 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-15 04:10:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 583. [2022-02-15 04:10:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 462 states have (on average 1.2705627705627707) internal successors, (587), 472 states have internal predecessors, (587), 69 states have call successors, (69), 44 states have call predecessors, (69), 51 states have return successors, (83), 67 states have call predecessors, (83), 61 states have call successors, (83) [2022-02-15 04:10:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 739 transitions. [2022-02-15 04:10:44,223 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 739 transitions. Word has length 53 [2022-02-15 04:10:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:44,224 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 739 transitions. [2022-02-15 04:10:44,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 739 transitions. [2022-02-15 04:10:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 04:10:44,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:44,225 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:44,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 04:10:44,225 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:44,225 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 1 times [2022-02-15 04:10:44,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:44,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703947575] [2022-02-15 04:10:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:44,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:44,227 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:44,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:44,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703947575] [2022-02-15 04:10:44,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [703947575] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:44,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:44,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:10:44,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261061502] [2022-02-15 04:10:44,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:44,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:10:44,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:10:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:44,435 INFO L87 Difference]: Start difference. First operand 583 states and 739 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:45,430 INFO L93 Difference]: Finished difference Result 644 states and 823 transitions. [2022-02-15 04:10:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:45,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2022-02-15 04:10:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:45,433 INFO L225 Difference]: With dead ends: 644 [2022-02-15 04:10:45,433 INFO L226 Difference]: Without dead ends: 629 [2022-02-15 04:10:45,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:45,433 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 529 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:45,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1614 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-02-15 04:10:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 589. [2022-02-15 04:10:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 467 states have (on average 1.2676659528907923) internal successors, (592), 478 states have internal predecessors, (592), 69 states have call successors, (69), 44 states have call predecessors, (69), 52 states have return successors, (90), 67 states have call predecessors, (90), 61 states have call successors, (90) [2022-02-15 04:10:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 751 transitions. [2022-02-15 04:10:45,532 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 751 transitions. Word has length 53 [2022-02-15 04:10:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:45,532 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 751 transitions. [2022-02-15 04:10:45,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 751 transitions. [2022-02-15 04:10:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 04:10:45,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:45,533 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:45,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 04:10:45,534 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 1 times [2022-02-15 04:10:45,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:45,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991901239] [2022-02-15 04:10:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:45,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:45,535 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:45,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:45,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991901239] [2022-02-15 04:10:45,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [991901239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:45,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:45,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:45,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987686995] [2022-02-15 04:10:45,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:45,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:45,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:45,707 INFO L87 Difference]: Start difference. First operand 589 states and 751 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:47,204 INFO L93 Difference]: Finished difference Result 758 states and 985 transitions. [2022-02-15 04:10:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:10:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-02-15 04:10:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:47,207 INFO L225 Difference]: With dead ends: 758 [2022-02-15 04:10:47,207 INFO L226 Difference]: Without dead ends: 740 [2022-02-15 04:10:47,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-02-15 04:10:47,208 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 954 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:47,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 921 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-02-15 04:10:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 573. [2022-02-15 04:10:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 454 states have (on average 1.2731277533039647) internal successors, (578), 464 states have internal predecessors, (578), 68 states have call successors, (68), 44 states have call predecessors, (68), 50 states have return successors, (81), 65 states have call predecessors, (81), 60 states have call successors, (81) [2022-02-15 04:10:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 727 transitions. [2022-02-15 04:10:47,301 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 727 transitions. Word has length 54 [2022-02-15 04:10:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:47,302 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 727 transitions. [2022-02-15 04:10:47,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 727 transitions. [2022-02-15 04:10:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 04:10:47,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:47,303 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:47,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 04:10:47,303 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:47,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 1 times [2022-02-15 04:10:47,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:47,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652537638] [2022-02-15 04:10:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:47,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:47,305 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 04:10:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 04:10:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:47,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:47,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652537638] [2022-02-15 04:10:47,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [652537638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:47,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:47,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:47,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229527500] [2022-02-15 04:10:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:47,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:47,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:47,496 INFO L87 Difference]: Start difference. First operand 573 states and 727 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:48,633 INFO L93 Difference]: Finished difference Result 608 states and 766 transitions. [2022-02-15 04:10:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-02-15 04:10:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:48,635 INFO L225 Difference]: With dead ends: 608 [2022-02-15 04:10:48,635 INFO L226 Difference]: Without dead ends: 580 [2022-02-15 04:10:48,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:48,636 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 363 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:48,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1679 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-15 04:10:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 561. [2022-02-15 04:10:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 445 states have (on average 1.2719101123595506) internal successors, (566), 455 states have internal predecessors, (566), 66 states have call successors, (66), 43 states have call predecessors, (66), 49 states have return successors, (79), 63 states have call predecessors, (79), 58 states have call successors, (79) [2022-02-15 04:10:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 711 transitions. [2022-02-15 04:10:48,742 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 711 transitions. Word has length 55 [2022-02-15 04:10:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:48,742 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 711 transitions. [2022-02-15 04:10:48,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 711 transitions. [2022-02-15 04:10:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 04:10:48,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:48,743 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:48,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 04:10:48,743 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 1 times [2022-02-15 04:10:48,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:48,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287079464] [2022-02-15 04:10:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:48,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:48,746 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:10:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 04:10:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:48,858 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:48,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287079464] [2022-02-15 04:10:48,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287079464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:48,858 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:48,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:48,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850919364] [2022-02-15 04:10:48,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:48,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:48,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:48,859 INFO L87 Difference]: Start difference. First operand 561 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:49,625 INFO L93 Difference]: Finished difference Result 898 states and 1149 transitions. [2022-02-15 04:10:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:49,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-02-15 04:10:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:49,627 INFO L225 Difference]: With dead ends: 898 [2022-02-15 04:10:49,627 INFO L226 Difference]: Without dead ends: 589 [2022-02-15 04:10:49,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:49,628 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 393 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:49,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 817 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-15 04:10:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 566. [2022-02-15 04:10:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 449 states have (on average 1.265033407572383) internal successors, (568), 460 states have internal predecessors, (568), 66 states have call successors, (66), 43 states have call predecessors, (66), 50 states have return successors, (83), 63 states have call predecessors, (83), 58 states have call successors, (83) [2022-02-15 04:10:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 717 transitions. [2022-02-15 04:10:49,722 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 717 transitions. Word has length 58 [2022-02-15 04:10:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:49,723 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 717 transitions. [2022-02-15 04:10:49,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 717 transitions. [2022-02-15 04:10:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 04:10:49,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:49,723 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:49,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 04:10:49,724 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:49,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:49,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 1 times [2022-02-15 04:10:49,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:49,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409582827] [2022-02-15 04:10:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:49,726 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:10:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:49,939 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:49,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409582827] [2022-02-15 04:10:49,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [409582827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:49,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:49,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:49,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253252660] [2022-02-15 04:10:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:49,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:49,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:49,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:49,940 INFO L87 Difference]: Start difference. First operand 566 states and 717 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:50,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:50,984 INFO L93 Difference]: Finished difference Result 852 states and 1088 transitions. [2022-02-15 04:10:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:50,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2022-02-15 04:10:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:50,986 INFO L225 Difference]: With dead ends: 852 [2022-02-15 04:10:50,986 INFO L226 Difference]: Without dead ends: 538 [2022-02-15 04:10:50,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:50,987 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 302 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:50,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1212 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-15 04:10:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 511. [2022-02-15 04:10:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 402 states have (on average 1.2537313432835822) internal successors, (504), 410 states have internal predecessors, (504), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (72), 59 states have call predecessors, (72), 56 states have call successors, (72) [2022-02-15 04:10:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 639 transitions. [2022-02-15 04:10:51,087 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 639 transitions. Word has length 64 [2022-02-15 04:10:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:51,087 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 639 transitions. [2022-02-15 04:10:51,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 639 transitions. [2022-02-15 04:10:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 04:10:51,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:51,089 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:51,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 04:10:51,089 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 1 times [2022-02-15 04:10:51,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:51,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515763047] [2022-02-15 04:10:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:51,091 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 04:10:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:51,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:51,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515763047] [2022-02-15 04:10:51,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [515763047] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:51,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:51,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:51,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681803685] [2022-02-15 04:10:51,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:51,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:51,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:51,261 INFO L87 Difference]: Start difference. First operand 511 states and 639 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 04:10:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:52,541 INFO L93 Difference]: Finished difference Result 545 states and 678 transitions. [2022-02-15 04:10:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:10:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-02-15 04:10:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:52,542 INFO L225 Difference]: With dead ends: 545 [2022-02-15 04:10:52,542 INFO L226 Difference]: Without dead ends: 524 [2022-02-15 04:10:52,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:10:52,543 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 507 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:52,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1186 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-15 04:10:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 508. [2022-02-15 04:10:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 399 states have (on average 1.255639097744361) internal successors, (501), 408 states have internal predecessors, (501), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (71), 58 states have call predecessors, (71), 56 states have call successors, (71) [2022-02-15 04:10:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 635 transitions. [2022-02-15 04:10:52,628 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 635 transitions. Word has length 59 [2022-02-15 04:10:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:52,629 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 635 transitions. [2022-02-15 04:10:52,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 04:10:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 635 transitions. [2022-02-15 04:10:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 04:10:52,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:52,629 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:52,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 04:10:52,630 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:52,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:52,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 1 times [2022-02-15 04:10:52,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:52,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230660255] [2022-02-15 04:10:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:52,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:52,631 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:10:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:52,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:52,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230660255] [2022-02-15 04:10:52,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230660255] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:52,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:52,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:10:52,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780749041] [2022-02-15 04:10:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:52,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:10:52,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:10:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:52,788 INFO L87 Difference]: Start difference. First operand 508 states and 635 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:53,767 INFO L93 Difference]: Finished difference Result 538 states and 669 transitions. [2022-02-15 04:10:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:53,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 58 [2022-02-15 04:10:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:53,769 INFO L225 Difference]: With dead ends: 538 [2022-02-15 04:10:53,769 INFO L226 Difference]: Without dead ends: 520 [2022-02-15 04:10:53,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:53,770 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 366 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:53,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1556 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-15 04:10:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 504. [2022-02-15 04:10:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 396 states have (on average 1.255050505050505) internal successors, (497), 405 states have internal predecessors, (497), 62 states have call successors, (62), 42 states have call predecessors, (62), 45 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-02-15 04:10:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 629 transitions. [2022-02-15 04:10:53,879 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 629 transitions. Word has length 58 [2022-02-15 04:10:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:53,879 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 629 transitions. [2022-02-15 04:10:53,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 629 transitions. [2022-02-15 04:10:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 04:10:53,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:53,880 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:53,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 04:10:53,880 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 1 times [2022-02-15 04:10:53,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:53,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389963359] [2022-02-15 04:10:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:53,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:53,882 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:10:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:10:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 04:10:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:54,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:54,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389963359] [2022-02-15 04:10:54,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389963359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:54,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:54,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:54,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581199854] [2022-02-15 04:10:54,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:54,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:54,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:54,033 INFO L87 Difference]: Start difference. First operand 504 states and 629 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 04:10:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:55,077 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2022-02-15 04:10:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-02-15 04:10:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:55,079 INFO L225 Difference]: With dead ends: 539 [2022-02-15 04:10:55,080 INFO L226 Difference]: Without dead ends: 515 [2022-02-15 04:10:55,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:10:55,080 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 399 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:55,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 844 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-02-15 04:10:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 499. [2022-02-15 04:10:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.251908396946565) internal successors, (492), 401 states have internal predecessors, (492), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-02-15 04:10:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-02-15 04:10:55,175 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 60 [2022-02-15 04:10:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:55,175 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-02-15 04:10:55,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 04:10:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-02-15 04:10:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 04:10:55,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:55,176 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:55,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 04:10:55,176 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 1 times [2022-02-15 04:10:55,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:55,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226253041] [2022-02-15 04:10:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:55,178 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:10:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:55,327 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:55,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226253041] [2022-02-15 04:10:55,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226253041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:55,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:55,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:55,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210392998] [2022-02-15 04:10:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:55,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:55,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:55,329 INFO L87 Difference]: Start difference. First operand 499 states and 621 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:56,456 INFO L93 Difference]: Finished difference Result 780 states and 980 transitions. [2022-02-15 04:10:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-02-15 04:10:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:56,458 INFO L225 Difference]: With dead ends: 780 [2022-02-15 04:10:56,459 INFO L226 Difference]: Without dead ends: 521 [2022-02-15 04:10:56,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:10:56,460 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 624 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:56,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1041 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-15 04:10:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2022-02-15 04:10:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.2468193384223918) internal successors, (490), 401 states have internal predecessors, (490), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-02-15 04:10:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 619 transitions. [2022-02-15 04:10:56,554 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 619 transitions. Word has length 68 [2022-02-15 04:10:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:56,554 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 619 transitions. [2022-02-15 04:10:56,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 619 transitions. [2022-02-15 04:10:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 04:10:56,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:56,555 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 04:10:56,555 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 1 times [2022-02-15 04:10:56,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:56,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857982315] [2022-02-15 04:10:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:56,557 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:56,721 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:56,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857982315] [2022-02-15 04:10:56,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857982315] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:56,721 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:56,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:56,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111793409] [2022-02-15 04:10:56,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:56,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:56,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:56,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:56,723 INFO L87 Difference]: Start difference. First operand 499 states and 619 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:57,940 INFO L93 Difference]: Finished difference Result 611 states and 749 transitions. [2022-02-15 04:10:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:57,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-02-15 04:10:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:57,942 INFO L225 Difference]: With dead ends: 611 [2022-02-15 04:10:57,942 INFO L226 Difference]: Without dead ends: 519 [2022-02-15 04:10:57,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:57,943 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 257 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:57,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 814 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-02-15 04:10:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 503. [2022-02-15 04:10:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 396 states have (on average 1.244949494949495) internal successors, (493), 404 states have internal predecessors, (493), 61 states have call successors, (61), 42 states have call predecessors, (61), 45 states have return successors, (69), 57 states have call predecessors, (69), 54 states have call successors, (69) [2022-02-15 04:10:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 623 transitions. [2022-02-15 04:10:58,033 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 623 transitions. Word has length 63 [2022-02-15 04:10:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:58,034 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 623 transitions. [2022-02-15 04:10:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 623 transitions. [2022-02-15 04:10:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 04:10:58,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:58,034 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:58,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 04:10:58,035 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 1 times [2022-02-15 04:10:58,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:58,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908445900] [2022-02-15 04:10:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:58,036 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:10:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:58,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:58,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908445900] [2022-02-15 04:10:58,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [908445900] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:58,208 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:58,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:58,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495948019] [2022-02-15 04:10:58,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:58,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:58,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:58,209 INFO L87 Difference]: Start difference. First operand 503 states and 623 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:59,317 INFO L93 Difference]: Finished difference Result 529 states and 653 transitions. [2022-02-15 04:10:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:59,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-02-15 04:10:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:59,319 INFO L225 Difference]: With dead ends: 529 [2022-02-15 04:10:59,319 INFO L226 Difference]: Without dead ends: 505 [2022-02-15 04:10:59,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:10:59,320 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 429 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:59,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 972 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-02-15 04:10:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 489. [2022-02-15 04:10:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 384 states have (on average 1.2395833333333333) internal successors, (476), 391 states have internal predecessors, (476), 60 states have call successors, (60), 42 states have call predecessors, (60), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-02-15 04:10:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 604 transitions. [2022-02-15 04:10:59,415 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 604 transitions. Word has length 63 [2022-02-15 04:10:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 604 transitions. [2022-02-15 04:10:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 604 transitions. [2022-02-15 04:10:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 04:10:59,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:59,416 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:10:59,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 04:10:59,416 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 1 times [2022-02-15 04:10:59,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:59,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550300983] [2022-02-15 04:10:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:59,418 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:10:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:59,605 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:59,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550300983] [2022-02-15 04:10:59,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550300983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:59,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:59,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:59,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446397794] [2022-02-15 04:10:59,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:59,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:59,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:59,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:59,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:59,606 INFO L87 Difference]: Start difference. First operand 489 states and 604 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:00,762 INFO L93 Difference]: Finished difference Result 522 states and 642 transitions. [2022-02-15 04:11:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:11:00,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2022-02-15 04:11:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:00,764 INFO L225 Difference]: With dead ends: 522 [2022-02-15 04:11:00,764 INFO L226 Difference]: Without dead ends: 501 [2022-02-15 04:11:00,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:00,764 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 308 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:00,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1667 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:11:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-15 04:11:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 485. [2022-02-15 04:11:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2388451443569555) internal successors, (472), 388 states have internal predecessors, (472), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-02-15 04:11:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 598 transitions. [2022-02-15 04:11:00,855 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 598 transitions. Word has length 63 [2022-02-15 04:11:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:00,855 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 598 transitions. [2022-02-15 04:11:00,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 598 transitions. [2022-02-15 04:11:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 04:11:00,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:00,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:00,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 04:11:00,856 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 1 times [2022-02-15 04:11:00,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:00,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248693119] [2022-02-15 04:11:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:00,858 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:11:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:01,031 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:01,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248693119] [2022-02-15 04:11:01,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [248693119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:01,031 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:01,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:11:01,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281743758] [2022-02-15 04:11:01,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:01,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:11:01,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:11:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:11:01,032 INFO L87 Difference]: Start difference. First operand 485 states and 598 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 04:11:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:02,007 INFO L93 Difference]: Finished difference Result 746 states and 929 transitions. [2022-02-15 04:11:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 04:11:02,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2022-02-15 04:11:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:02,009 INFO L225 Difference]: With dead ends: 746 [2022-02-15 04:11:02,009 INFO L226 Difference]: Without dead ends: 520 [2022-02-15 04:11:02,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:02,010 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 552 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:02,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1352 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:11:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-15 04:11:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 485. [2022-02-15 04:11:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2335958005249343) internal successors, (470), 388 states have internal predecessors, (470), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-02-15 04:11:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 596 transitions. [2022-02-15 04:11:02,109 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 596 transitions. Word has length 71 [2022-02-15 04:11:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:02,109 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 596 transitions. [2022-02-15 04:11:02,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 04:11:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 596 transitions. [2022-02-15 04:11:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 04:11:02,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:02,110 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:11:02,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 04:11:02,110 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 1 times [2022-02-15 04:11:02,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:02,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733838050] [2022-02-15 04:11:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:02,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:02,112 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:11:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 04:11:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:02,290 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:02,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733838050] [2022-02-15 04:11:02,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733838050] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:02,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:02,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:11:02,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435346366] [2022-02-15 04:11:02,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:02,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:11:02,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:11:02,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:11:02,291 INFO L87 Difference]: Start difference. First operand 485 states and 596 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:03,136 INFO L93 Difference]: Finished difference Result 512 states and 627 transitions. [2022-02-15 04:11:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:11:03,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-02-15 04:11:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:03,138 INFO L225 Difference]: With dead ends: 512 [2022-02-15 04:11:03,138 INFO L226 Difference]: Without dead ends: 490 [2022-02-15 04:11:03,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:11:03,138 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 411 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:03,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1433 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:11:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-02-15 04:11:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 474. [2022-02-15 04:11:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 372 states have (on average 1.2311827956989247) internal successors, (458), 379 states have internal predecessors, (458), 58 states have call successors, (58), 42 states have call predecessors, (58), 43 states have return successors, (65), 53 states have call predecessors, (65), 52 states have call successors, (65) [2022-02-15 04:11:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 581 transitions. [2022-02-15 04:11:03,241 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 581 transitions. Word has length 64 [2022-02-15 04:11:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:03,241 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 581 transitions. [2022-02-15 04:11:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 581 transitions. [2022-02-15 04:11:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 04:11:03,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:03,242 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:11:03,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 04:11:03,242 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 1 times [2022-02-15 04:11:03,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:03,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355935339] [2022-02-15 04:11:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:03,244 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:03,418 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:03,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355935339] [2022-02-15 04:11:03,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355935339] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:03,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:03,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:11:03,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561215409] [2022-02-15 04:11:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:03,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:11:03,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:11:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:11:03,419 INFO L87 Difference]: Start difference. First operand 474 states and 581 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:04,416 INFO L93 Difference]: Finished difference Result 507 states and 619 transitions. [2022-02-15 04:11:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:11:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-02-15 04:11:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:04,417 INFO L225 Difference]: With dead ends: 507 [2022-02-15 04:11:04,417 INFO L226 Difference]: Without dead ends: 485 [2022-02-15 04:11:04,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:04,418 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 455 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:04,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1662 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:11:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-15 04:11:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 469. [2022-02-15 04:11:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 368 states have (on average 1.2309782608695652) internal successors, (453), 375 states have internal predecessors, (453), 57 states have call successors, (57), 42 states have call predecessors, (57), 43 states have return successors, (64), 52 states have call predecessors, (64), 51 states have call successors, (64) [2022-02-15 04:11:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 574 transitions. [2022-02-15 04:11:04,510 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 574 transitions. Word has length 64 [2022-02-15 04:11:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:04,510 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 574 transitions. [2022-02-15 04:11:04,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 574 transitions. [2022-02-15 04:11:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 04:11:04,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:04,511 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:11:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 04:11:04,511 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 1 times [2022-02-15 04:11:04,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:04,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834725393] [2022-02-15 04:11:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:04,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:04,513 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:04,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:04,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:04,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:04,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:04,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:04,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834725393] [2022-02-15 04:11:04,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [834725393] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:04,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:04,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:11:04,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153927314] [2022-02-15 04:11:04,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:04,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:11:04,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:11:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:11:04,701 INFO L87 Difference]: Start difference. First operand 469 states and 574 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:05,691 INFO L93 Difference]: Finished difference Result 502 states and 612 transitions. [2022-02-15 04:11:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:11:05,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-02-15 04:11:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:05,693 INFO L225 Difference]: With dead ends: 502 [2022-02-15 04:11:05,693 INFO L226 Difference]: Without dead ends: 481 [2022-02-15 04:11:05,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:05,693 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 337 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:05,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1554 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:11:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-02-15 04:11:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 465. [2022-02-15 04:11:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2301369863013698) internal successors, (449), 372 states have internal predecessors, (449), 56 states have call successors, (56), 42 states have call predecessors, (56), 43 states have return successors, (63), 51 states have call predecessors, (63), 50 states have call successors, (63) [2022-02-15 04:11:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 568 transitions. [2022-02-15 04:11:05,778 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 568 transitions. Word has length 64 [2022-02-15 04:11:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:05,779 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 568 transitions. [2022-02-15 04:11:05,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 568 transitions. [2022-02-15 04:11:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 04:11:05,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:05,779 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:11:05,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 04:11:05,780 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 1 times [2022-02-15 04:11:05,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:05,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406344521] [2022-02-15 04:11:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:05,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:05,781 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:11:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:05,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:05,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406344521] [2022-02-15 04:11:05,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406344521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:05,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:05,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 04:11:05,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454800401] [2022-02-15 04:11:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:05,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 04:11:05,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 04:11:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:11:05,947 INFO L87 Difference]: Start difference. First operand 465 states and 568 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:11:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:06,709 INFO L93 Difference]: Finished difference Result 878 states and 1082 transitions. [2022-02-15 04:11:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:11:06,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-02-15 04:11:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:06,711 INFO L225 Difference]: With dead ends: 878 [2022-02-15 04:11:06,712 INFO L226 Difference]: Without dead ends: 625 [2022-02-15 04:11:06,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:11:06,713 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 724 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:06,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 884 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:11:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-15 04:11:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 586. [2022-02-15 04:11:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 458 states have (on average 1.220524017467249) internal successors, (559), 467 states have internal predecessors, (559), 69 states have call successors, (69), 52 states have call predecessors, (69), 58 states have return successors, (88), 67 states have call predecessors, (88), 64 states have call successors, (88) [2022-02-15 04:11:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 716 transitions. [2022-02-15 04:11:06,815 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 716 transitions. Word has length 73 [2022-02-15 04:11:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:06,815 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 716 transitions. [2022-02-15 04:11:06,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:11:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 716 transitions. [2022-02-15 04:11:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 04:11:06,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:06,816 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:11:06,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 04:11:06,816 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 1 times [2022-02-15 04:11:06,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:06,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909938728] [2022-02-15 04:11:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:06,818 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:06,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:06,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:06,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:06,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 04:11:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:07,004 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:07,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909938728] [2022-02-15 04:11:07,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909938728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:07,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:07,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:11:07,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155033115] [2022-02-15 04:11:07,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:07,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:11:07,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:11:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:11:07,005 INFO L87 Difference]: Start difference. First operand 586 states and 716 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:07,901 INFO L93 Difference]: Finished difference Result 619 states and 755 transitions. [2022-02-15 04:11:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:11:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-02-15 04:11:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:07,903 INFO L225 Difference]: With dead ends: 619 [2022-02-15 04:11:07,903 INFO L226 Difference]: Without dead ends: 576 [2022-02-15 04:11:07,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:07,904 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 559 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:07,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1423 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:11:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-02-15 04:11:08,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 560. [2022-02-15 04:11:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 437 states have (on average 1.2196796338672768) internal successors, (533), 446 states have internal predecessors, (533), 66 states have call successors, (66), 50 states have call predecessors, (66), 56 states have return successors, (85), 64 states have call predecessors, (85), 61 states have call successors, (85) [2022-02-15 04:11:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 684 transitions. [2022-02-15 04:11:08,013 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 684 transitions. Word has length 68 [2022-02-15 04:11:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:08,014 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 684 transitions. [2022-02-15 04:11:08,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:11:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 684 transitions. [2022-02-15 04:11:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 04:11:08,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:08,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:08,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 04:11:08,014 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 1 times [2022-02-15 04:11:08,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:08,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788381097] [2022-02-15 04:11:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:08,016 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 04:11:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:11:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:08,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:08,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788381097] [2022-02-15 04:11:08,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [788381097] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:08,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:08,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:11:08,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278247861] [2022-02-15 04:11:08,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:08,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:11:08,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:11:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:11:08,231 INFO L87 Difference]: Start difference. First operand 560 states and 684 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:11:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:09,449 INFO L93 Difference]: Finished difference Result 589 states and 718 transitions. [2022-02-15 04:11:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 04:11:09,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2022-02-15 04:11:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:09,451 INFO L225 Difference]: With dead ends: 589 [2022-02-15 04:11:09,451 INFO L226 Difference]: Without dead ends: 535 [2022-02-15 04:11:09,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:11:09,451 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 382 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:09,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 902 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:11:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-15 04:11:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 519. [2022-02-15 04:11:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 403 states have (on average 1.2133995037220844) internal successors, (489), 412 states have internal predecessors, (489), 62 states have call successors, (62), 47 states have call predecessors, (62), 53 states have return successors, (81), 60 states have call predecessors, (81), 57 states have call successors, (81) [2022-02-15 04:11:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 632 transitions. [2022-02-15 04:11:09,553 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 632 transitions. Word has length 71 [2022-02-15 04:11:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:09,553 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 632 transitions. [2022-02-15 04:11:09,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:11:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 632 transitions. [2022-02-15 04:11:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 04:11:09,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:09,554 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:11:09,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 04:11:09,554 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 1 times [2022-02-15 04:11:09,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:09,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704236648] [2022-02-15 04:11:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:09,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:09,556 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:11:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 04:11:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:09,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:09,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704236648] [2022-02-15 04:11:09,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [704236648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:09,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:09,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 04:11:09,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272222153] [2022-02-15 04:11:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:09,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 04:11:09,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 04:11:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-15 04:11:09,704 INFO L87 Difference]: Start difference. First operand 519 states and 632 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:11:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:10,527 INFO L93 Difference]: Finished difference Result 840 states and 1028 transitions. [2022-02-15 04:11:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:11:10,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-02-15 04:11:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:10,528 INFO L225 Difference]: With dead ends: 840 [2022-02-15 04:11:10,528 INFO L226 Difference]: Without dead ends: 523 [2022-02-15 04:11:10,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:11:10,530 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 389 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:10,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1142 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:11:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-15 04:11:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 501. [2022-02-15 04:11:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 389 states have (on average 1.2133676092544987) internal successors, (472), 397 states have internal predecessors, (472), 60 states have call successors, (60), 47 states have call predecessors, (60), 51 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-02-15 04:11:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 602 transitions. [2022-02-15 04:11:10,629 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 602 transitions. Word has length 82 [2022-02-15 04:11:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:10,629 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 602 transitions. [2022-02-15 04:11:10,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:11:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 602 transitions. [2022-02-15 04:11:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 04:11:10,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:10,630 INFO L514 BasicCegarLoop]: 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] [2022-02-15 04:11:10,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 04:11:10,630 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:10,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 1 times [2022-02-15 04:11:10,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:10,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542873876] [2022-02-15 04:11:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:10,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:10,632 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:11:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 04:11:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:10,835 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:10,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542873876] [2022-02-15 04:11:10,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1542873876] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:10,835 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:10,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:11:10,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963066479] [2022-02-15 04:11:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:10,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:11:10,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:11:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:11:10,836 INFO L87 Difference]: Start difference. First operand 501 states and 602 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:11:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:11,631 INFO L93 Difference]: Finished difference Result 839 states and 1046 transitions. [2022-02-15 04:11:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 04:11:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-02-15 04:11:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:11,633 INFO L225 Difference]: With dead ends: 839 [2022-02-15 04:11:11,633 INFO L226 Difference]: Without dead ends: 585 [2022-02-15 04:11:11,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-15 04:11:11,634 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 526 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:11,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1426 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:11:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-02-15 04:11:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 465. [2022-02-15 04:11:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2136986301369863) internal successors, (443), 371 states have internal predecessors, (443), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-02-15 04:11:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-02-15 04:11:11,724 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 83 [2022-02-15 04:11:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:11,724 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-02-15 04:11:11,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:11:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-02-15 04:11:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 04:11:11,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:11,725 INFO L514 BasicCegarLoop]: 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, 1, 1] [2022-02-15 04:11:11,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 04:11:11,725 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 1 times [2022-02-15 04:11:11,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:11,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811510899] [2022-02-15 04:11:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:11,727 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 04:11:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:11,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:11,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811510899] [2022-02-15 04:11:11,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811510899] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:11,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:11,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 04:11:11,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305758364] [2022-02-15 04:11:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:11,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 04:11:11,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 04:11:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:11,924 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:11:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:12,851 INFO L93 Difference]: Finished difference Result 526 states and 629 transitions. [2022-02-15 04:11:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 04:11:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2022-02-15 04:11:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:12,853 INFO L225 Difference]: With dead ends: 526 [2022-02-15 04:11:12,853 INFO L226 Difference]: Without dead ends: 505 [2022-02-15 04:11:12,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:11:12,867 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 359 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:12,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1564 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:11:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-02-15 04:11:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2022-02-15 04:11:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 372 states have (on average 1.2096774193548387) internal successors, (450), 378 states have internal predecessors, (450), 53 states have call successors, (53), 41 states have call predecessors, (53), 47 states have return successors, (63), 54 states have call predecessors, (63), 49 states have call successors, (63) [2022-02-15 04:11:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 566 transitions. [2022-02-15 04:11:12,955 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 566 transitions. Word has length 88 [2022-02-15 04:11:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:12,956 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 566 transitions. [2022-02-15 04:11:12,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:11:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 566 transitions. [2022-02-15 04:11:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 04:11:12,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:12,957 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2022-02-15 04:11:12,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 04:11:12,960 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:12,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 1 times [2022-02-15 04:11:12,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:12,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920336036] [2022-02-15 04:11:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:12,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:12,962 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 04:11:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:13,159 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:13,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920336036] [2022-02-15 04:11:13,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [920336036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:13,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:13,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 04:11:13,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455046063] [2022-02-15 04:11:13,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:13,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 04:11:13,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:13,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 04:11:13,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:13,161 INFO L87 Difference]: Start difference. First operand 473 states and 566 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:11:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:14,062 INFO L93 Difference]: Finished difference Result 526 states and 628 transitions. [2022-02-15 04:11:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 04:11:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2022-02-15 04:11:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:14,064 INFO L225 Difference]: With dead ends: 526 [2022-02-15 04:11:14,064 INFO L226 Difference]: Without dead ends: 505 [2022-02-15 04:11:14,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:11:14,065 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 409 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:14,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1709 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:11:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-02-15 04:11:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 465. [2022-02-15 04:11:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.210958904109589) internal successors, (442), 371 states have internal predecessors, (442), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-02-15 04:11:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-02-15 04:11:14,158 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 89 [2022-02-15 04:11:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:14,159 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-02-15 04:11:14,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:11:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-02-15 04:11:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 04:11:14,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:14,160 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:14,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 04:11:14,160 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 1 times [2022-02-15 04:11:14,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:14,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110601292] [2022-02-15 04:11:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:14,162 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:11:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 04:11:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 04:11:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:14,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:14,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110601292] [2022-02-15 04:11:14,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110601292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:14,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:14,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:11:14,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259255793] [2022-02-15 04:11:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:14,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:11:14,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:11:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:11:14,345 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 04:11:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:15,284 INFO L93 Difference]: Finished difference Result 910 states and 1073 transitions. [2022-02-15 04:11:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:11:15,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2022-02-15 04:11:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:15,286 INFO L225 Difference]: With dead ends: 910 [2022-02-15 04:11:15,286 INFO L226 Difference]: Without dead ends: 611 [2022-02-15 04:11:15,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-15 04:11:15,287 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 708 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:15,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 542 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:11:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-15 04:11:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 586. [2022-02-15 04:11:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 462 states have (on average 1.2034632034632036) internal successors, (556), 470 states have internal predecessors, (556), 61 states have call successors, (61), 53 states have call predecessors, (61), 62 states have return successors, (72), 63 states have call predecessors, (72), 57 states have call successors, (72) [2022-02-15 04:11:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 689 transitions. [2022-02-15 04:11:15,411 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 689 transitions. Word has length 92 [2022-02-15 04:11:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:15,411 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 689 transitions. [2022-02-15 04:11:15,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 04:11:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 689 transitions. [2022-02-15 04:11:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 04:11:15,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:15,412 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:15,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 04:11:15,412 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 1 times [2022-02-15 04:11:15,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:15,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388203099] [2022-02-15 04:11:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:15,414 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:11:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 04:11:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 04:11:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:15,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:15,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388203099] [2022-02-15 04:11:15,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388203099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:15,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:15,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 04:11:15,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53083883] [2022-02-15 04:11:15,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:15,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 04:11:15,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 04:11:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:15,623 INFO L87 Difference]: Start difference. First operand 586 states and 689 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 04:11:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:16,670 INFO L93 Difference]: Finished difference Result 590 states and 692 transitions. [2022-02-15 04:11:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:11:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 93 [2022-02-15 04:11:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:16,672 INFO L225 Difference]: With dead ends: 590 [2022-02-15 04:11:16,672 INFO L226 Difference]: Without dead ends: 498 [2022-02-15 04:11:16,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-15 04:11:16,673 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 306 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:16,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 644 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:11:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-15 04:11:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2022-02-15 04:11:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.20671834625323) internal successors, (467), 394 states have internal predecessors, (467), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-02-15 04:11:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 585 transitions. [2022-02-15 04:11:16,779 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 585 transitions. Word has length 93 [2022-02-15 04:11:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:16,779 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 585 transitions. [2022-02-15 04:11:16,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 04:11:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 585 transitions. [2022-02-15 04:11:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-15 04:11:16,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:16,780 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:16,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 04:11:16,780 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 1 times [2022-02-15 04:11:16,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:16,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673938111] [2022-02-15 04:11:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:16,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:16,782 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 04:11:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 04:11:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:16,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:16,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673938111] [2022-02-15 04:11:16,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673938111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:16,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:16,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:11:16,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387036849] [2022-02-15 04:11:16,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:16,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:11:16,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:11:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:11:16,973 INFO L87 Difference]: Start difference. First operand 496 states and 585 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 04:11:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:17,479 INFO L93 Difference]: Finished difference Result 531 states and 619 transitions. [2022-02-15 04:11:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:11:17,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2022-02-15 04:11:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:17,496 INFO L225 Difference]: With dead ends: 531 [2022-02-15 04:11:17,496 INFO L226 Difference]: Without dead ends: 492 [2022-02-15 04:11:17,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:11:17,496 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 187 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:17,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 930 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 04:11:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-15 04:11:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 439. [2022-02-15 04:11:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 343 states have (on average 1.19533527696793) internal successors, (410), 349 states have internal predecessors, (410), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-02-15 04:11:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 512 transitions. [2022-02-15 04:11:17,608 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 512 transitions. Word has length 99 [2022-02-15 04:11:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:17,608 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 512 transitions. [2022-02-15 04:11:17,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 04:11:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 512 transitions. [2022-02-15 04:11:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-15 04:11:17,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:17,609 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:17,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 04:11:17,609 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 1 times [2022-02-15 04:11:17,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:17,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55189349] [2022-02-15 04:11:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:17,610 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 04:11:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 04:11:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:17,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:17,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55189349] [2022-02-15 04:11:17,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [55189349] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:17,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:17,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:11:17,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380553787] [2022-02-15 04:11:17,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:17,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:11:17,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:11:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:11:17,789 INFO L87 Difference]: Start difference. First operand 439 states and 512 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 04:11:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:18,677 INFO L93 Difference]: Finished difference Result 842 states and 986 transitions. [2022-02-15 04:11:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 04:11:18,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2022-02-15 04:11:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:18,679 INFO L225 Difference]: With dead ends: 842 [2022-02-15 04:11:18,680 INFO L226 Difference]: Without dead ends: 797 [2022-02-15 04:11:18,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-02-15 04:11:18,680 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 579 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:18,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1614 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:11:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-02-15 04:11:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 419. [2022-02-15 04:11:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 327 states have (on average 1.1957186544342508) internal successors, (391), 332 states have internal predecessors, (391), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-02-15 04:11:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 487 transitions. [2022-02-15 04:11:18,782 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 487 transitions. Word has length 99 [2022-02-15 04:11:18,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:18,782 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 487 transitions. [2022-02-15 04:11:18,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 04:11:18,782 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 487 transitions. [2022-02-15 04:11:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-15 04:11:18,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:18,783 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:18,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 04:11:18,783 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 1 times [2022-02-15 04:11:18,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:18,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573085484] [2022-02-15 04:11:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:18,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:18,785 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:18,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:19,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:19,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:19,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 04:11:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:19,043 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:19,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573085484] [2022-02-15 04:11:19,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [573085484] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:19,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:19,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 04:11:19,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802482210] [2022-02-15 04:11:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:19,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 04:11:19,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 04:11:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:11:19,044 INFO L87 Difference]: Start difference. First operand 419 states and 487 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-02-15 04:11:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:19,832 INFO L93 Difference]: Finished difference Result 561 states and 656 transitions. [2022-02-15 04:11:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 04:11:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 104 [2022-02-15 04:11:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:19,836 INFO L225 Difference]: With dead ends: 561 [2022-02-15 04:11:19,836 INFO L226 Difference]: Without dead ends: 438 [2022-02-15 04:11:19,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:11:19,837 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 134 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:19,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1143 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:11:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-15 04:11:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 428. [2022-02-15 04:11:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 335 states have (on average 1.182089552238806) internal successors, (396), 341 states have internal predecessors, (396), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-02-15 04:11:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 493 transitions. [2022-02-15 04:11:19,939 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 493 transitions. Word has length 104 [2022-02-15 04:11:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:19,939 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 493 transitions. [2022-02-15 04:11:19,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-02-15 04:11:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 493 transitions. [2022-02-15 04:11:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 04:11:19,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:19,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-02-15 04:11:19,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 04:11:19,940 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 1 times [2022-02-15 04:11:19,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:19,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601150073] [2022-02-15 04:11:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:19,942 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:11:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 04:11:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:20,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:20,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601150073] [2022-02-15 04:11:20,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [601150073] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:20,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:20,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:11:20,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139718619] [2022-02-15 04:11:20,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:20,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:11:20,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:11:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:11:20,104 INFO L87 Difference]: Start difference. First operand 428 states and 493 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 04:11:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:20,523 INFO L93 Difference]: Finished difference Result 749 states and 870 transitions. [2022-02-15 04:11:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:11:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 113 [2022-02-15 04:11:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:20,524 INFO L225 Difference]: With dead ends: 749 [2022-02-15 04:11:20,524 INFO L226 Difference]: Without dead ends: 440 [2022-02-15 04:11:20,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:11:20,525 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 181 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:20,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 765 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 04:11:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-15 04:11:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-02-15 04:11:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 341 states have (on average 1.1788856304985338) internal successors, (402), 347 states have internal predecessors, (402), 45 states have call successors, (45), 41 states have call predecessors, (45), 49 states have return successors, (54), 47 states have call predecessors, (54), 41 states have call successors, (54) [2022-02-15 04:11:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 501 transitions. [2022-02-15 04:11:20,628 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 501 transitions. Word has length 113 [2022-02-15 04:11:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:20,628 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 501 transitions. [2022-02-15 04:11:20,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 04:11:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 501 transitions. [2022-02-15 04:11:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 04:11:20,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:20,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-02-15 04:11:20,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 04:11:20,629 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:20,630 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 1 times [2022-02-15 04:11:20,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:20,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364932449] [2022-02-15 04:11:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:20,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:20,631 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:11:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 04:11:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:20,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:20,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364932449] [2022-02-15 04:11:20,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [364932449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:20,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:20,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:11:20,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501290499] [2022-02-15 04:11:20,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:20,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:11:20,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:11:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:11:20,840 INFO L87 Difference]: Start difference. First operand 436 states and 501 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-02-15 04:11:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:21,395 INFO L93 Difference]: Finished difference Result 471 states and 535 transitions. [2022-02-15 04:11:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 04:11:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 113 [2022-02-15 04:11:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:21,397 INFO L225 Difference]: With dead ends: 471 [2022-02-15 04:11:21,397 INFO L226 Difference]: Without dead ends: 387 [2022-02-15 04:11:21,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:11:21,400 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 156 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:21,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 892 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 04:11:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-15 04:11:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 249. [2022-02-15 04:11:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 195 states have (on average 1.1384615384615384) internal successors, (222), 197 states have internal predecessors, (222), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-02-15 04:11:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 275 transitions. [2022-02-15 04:11:21,468 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 275 transitions. Word has length 113 [2022-02-15 04:11:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:21,469 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 275 transitions. [2022-02-15 04:11:21,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-02-15 04:11:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 275 transitions. [2022-02-15 04:11:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-15 04:11:21,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:21,469 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:21,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 04:11:21,470 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:21,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 1 times [2022-02-15 04:11:21,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:21,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975699750] [2022-02-15 04:11:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:21,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:21,471 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-15 04:11:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 04:11:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:21,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:21,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975699750] [2022-02-15 04:11:21,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975699750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:21,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:21,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:11:21,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881083536] [2022-02-15 04:11:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:21,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:11:21,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:21,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:11:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:11:21,674 INFO L87 Difference]: Start difference. First operand 249 states and 275 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:11:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:22,199 INFO L93 Difference]: Finished difference Result 293 states and 322 transitions. [2022-02-15 04:11:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:11:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-02-15 04:11:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:22,204 INFO L225 Difference]: With dead ends: 293 [2022-02-15 04:11:22,204 INFO L226 Difference]: Without dead ends: 263 [2022-02-15 04:11:22,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:11:22,204 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 250 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:22,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 758 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:11:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-15 04:11:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 253. [2022-02-15 04:11:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 200 states have internal predecessors, (225), 26 states have call successors, (26), 26 states have call predecessors, (26), 28 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-02-15 04:11:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 279 transitions. [2022-02-15 04:11:22,272 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 279 transitions. Word has length 120 [2022-02-15 04:11:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:22,272 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 279 transitions. [2022-02-15 04:11:22,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:11:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 279 transitions. [2022-02-15 04:11:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-15 04:11:22,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:22,273 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:22,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 04:11:22,273 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 1 times [2022-02-15 04:11:22,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:22,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363701003] [2022-02-15 04:11:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:22,275 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-15 04:11:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 04:11:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:22,464 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:22,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363701003] [2022-02-15 04:11:22,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363701003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:22,465 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:22,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:11:22,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193028588] [2022-02-15 04:11:22,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:22,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:11:22,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:11:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:11:22,465 INFO L87 Difference]: Start difference. First operand 253 states and 279 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:11:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:22,937 INFO L93 Difference]: Finished difference Result 339 states and 377 transitions. [2022-02-15 04:11:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:11:22,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-02-15 04:11:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:22,938 INFO L225 Difference]: With dead ends: 339 [2022-02-15 04:11:22,938 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 04:11:22,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:11:22,939 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 241 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:22,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 751 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:11:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 04:11:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-02-15 04:11:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 196 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-02-15 04:11:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 272 transitions. [2022-02-15 04:11:23,007 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 272 transitions. Word has length 120 [2022-02-15 04:11:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:23,007 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 272 transitions. [2022-02-15 04:11:23,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:11:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 272 transitions. [2022-02-15 04:11:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-15 04:11:23,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:23,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:23,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 04:11:23,008 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 1 times [2022-02-15 04:11:23,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:23,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871565723] [2022-02-15 04:11:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:23,010 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-15 04:11:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-15 04:11:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:23,371 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:23,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871565723] [2022-02-15 04:11:23,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [871565723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:23,371 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:23,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 04:11:23,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153234790] [2022-02-15 04:11:23,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:23,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 04:11:23,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 04:11:23,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:11:23,372 INFO L87 Difference]: Start difference. First operand 248 states and 272 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:11:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:24,260 INFO L93 Difference]: Finished difference Result 320 states and 360 transitions. [2022-02-15 04:11:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 04:11:24,260 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 150 [2022-02-15 04:11:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:24,261 INFO L225 Difference]: With dead ends: 320 [2022-02-15 04:11:24,261 INFO L226 Difference]: Without dead ends: 285 [2022-02-15 04:11:24,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 04:11:24,261 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:24,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1498 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:11:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-15 04:11:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 265. [2022-02-15 04:11:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-02-15 04:11:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2022-02-15 04:11:24,334 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 150 [2022-02-15 04:11:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:24,334 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2022-02-15 04:11:24,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:11:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2022-02-15 04:11:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-02-15 04:11:24,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:24,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:24,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 04:11:24,335 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:24,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 1 times [2022-02-15 04:11:24,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:24,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400193687] [2022-02-15 04:11:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:24,337 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-15 04:11:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 04:11:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:24,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:24,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400193687] [2022-02-15 04:11:24,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [400193687] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:24,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:24,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 04:11:24,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452936416] [2022-02-15 04:11:24,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:24,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 04:11:24,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 04:11:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:11:24,583 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:11:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:25,194 INFO L93 Difference]: Finished difference Result 360 states and 402 transitions. [2022-02-15 04:11:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 04:11:25,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2022-02-15 04:11:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:25,195 INFO L225 Difference]: With dead ends: 360 [2022-02-15 04:11:25,195 INFO L226 Difference]: Without dead ends: 279 [2022-02-15 04:11:25,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:11:25,196 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 244 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:25,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1117 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 04:11:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-15 04:11:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2022-02-15 04:11:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.1339712918660287) internal successors, (237), 211 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-02-15 04:11:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 292 transitions. [2022-02-15 04:11:25,275 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 292 transitions. Word has length 151 [2022-02-15 04:11:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:25,275 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 292 transitions. [2022-02-15 04:11:25,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:11:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 292 transitions. [2022-02-15 04:11:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-02-15 04:11:25,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:25,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:25,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 04:11:25,276 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 1 times [2022-02-15 04:11:25,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:25,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234575513] [2022-02-15 04:11:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:25,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:25,278 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-15 04:11:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-15 04:11:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-15 04:11:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:25,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:25,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234575513] [2022-02-15 04:11:25,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234575513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:25,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:25,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 04:11:25,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637215133] [2022-02-15 04:11:25,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:25,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 04:11:25,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 04:11:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:11:25,590 INFO L87 Difference]: Start difference. First operand 265 states and 292 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:11:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:26,304 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2022-02-15 04:11:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 04:11:26,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 153 [2022-02-15 04:11:26,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:26,305 INFO L225 Difference]: With dead ends: 306 [2022-02-15 04:11:26,305 INFO L226 Difference]: Without dead ends: 265 [2022-02-15 04:11:26,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-02-15 04:11:26,306 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:26,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1121 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:11:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-15 04:11:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2022-02-15 04:11:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 205 states have (on average 1.1219512195121952) internal successors, (230), 207 states have internal predecessors, (230), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-02-15 04:11:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2022-02-15 04:11:26,388 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 153 [2022-02-15 04:11:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:26,389 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2022-02-15 04:11:26,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:11:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2022-02-15 04:11:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-15 04:11:26,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:26,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:26,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 04:11:26,390 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 1 times [2022-02-15 04:11:26,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:26,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295981319] [2022-02-15 04:11:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:26,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:26,392 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-15 04:11:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-15 04:11:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-15 04:11:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:26,603 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:26,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295981319] [2022-02-15 04:11:26,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295981319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:26,604 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:26,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:11:26,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590049411] [2022-02-15 04:11:26,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:26,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:11:26,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:11:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:11:26,604 INFO L87 Difference]: Start difference. First operand 259 states and 283 transitions. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-02-15 04:11:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:27,070 INFO L93 Difference]: Finished difference Result 320 states and 349 transitions. [2022-02-15 04:11:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:11:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 158 [2022-02-15 04:11:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:27,071 INFO L225 Difference]: With dead ends: 320 [2022-02-15 04:11:27,071 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 04:11:27,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:11:27,072 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 349 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:27,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 498 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:11:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 04:11:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2022-02-15 04:11:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 181 states have (on average 1.1049723756906078) internal successors, (200), 183 states have internal predecessors, (200), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-02-15 04:11:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 249 transitions. [2022-02-15 04:11:27,154 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 249 transitions. Word has length 158 [2022-02-15 04:11:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:27,154 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 249 transitions. [2022-02-15 04:11:27,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-02-15 04:11:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 249 transitions. [2022-02-15 04:11:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-15 04:11:27,155 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:27,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:27,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 04:11:27,155 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 1 times [2022-02-15 04:11:27,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:27,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180437111] [2022-02-15 04:11:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:27,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:27,157 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 04:11:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-15 04:11:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-15 04:11:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:27,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:27,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180437111] [2022-02-15 04:11:27,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180437111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:27,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:27,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 04:11:27,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133604550] [2022-02-15 04:11:27,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:27,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 04:11:27,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 04:11:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-02-15 04:11:27,402 INFO L87 Difference]: Start difference. First operand 231 states and 249 transitions. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:11:27,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:27,775 INFO L93 Difference]: Finished difference Result 296 states and 320 transitions. [2022-02-15 04:11:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:11:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 160 [2022-02-15 04:11:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:27,776 INFO L225 Difference]: With dead ends: 296 [2022-02-15 04:11:27,776 INFO L226 Difference]: Without dead ends: 210 [2022-02-15 04:11:27,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-15 04:11:27,776 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 150 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:27,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 683 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:11:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-15 04:11:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-15 04:11:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0920245398773005) internal successors, (178), 164 states have internal predecessors, (178), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-02-15 04:11:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 224 transitions. [2022-02-15 04:11:27,828 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 224 transitions. Word has length 160 [2022-02-15 04:11:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:27,828 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 224 transitions. [2022-02-15 04:11:27,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:11:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 224 transitions. [2022-02-15 04:11:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-15 04:11:27,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:27,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:27,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 04:11:27,829 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:27,830 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 1 times [2022-02-15 04:11:27,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:27,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280085622] [2022-02-15 04:11:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:27,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:27,831 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:27,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:11:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 04:11:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-15 04:11:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:28,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:28,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280085622] [2022-02-15 04:11:28,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [280085622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:28,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:28,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 04:11:28,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417390895] [2022-02-15 04:11:28,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:28,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 04:11:28,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 04:11:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-15 04:11:28,133 INFO L87 Difference]: Start difference. First operand 210 states and 224 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:29,108 INFO L93 Difference]: Finished difference Result 414 states and 443 transitions. [2022-02-15 04:11:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 04:11:29,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 161 [2022-02-15 04:11:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:29,110 INFO L225 Difference]: With dead ends: 414 [2022-02-15 04:11:29,110 INFO L226 Difference]: Without dead ends: 213 [2022-02-15 04:11:29,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 04:11:29,111 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 487 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:29,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 640 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:11:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-15 04:11:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2022-02-15 04:11:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0858895705521472) internal successors, (177), 164 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-02-15 04:11:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 223 transitions. [2022-02-15 04:11:29,164 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 223 transitions. Word has length 161 [2022-02-15 04:11:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:29,164 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 223 transitions. [2022-02-15 04:11:29,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 223 transitions. [2022-02-15 04:11:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-15 04:11:29,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:29,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:29,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 04:11:29,165 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 1 times [2022-02-15 04:11:29,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:29,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911895760] [2022-02-15 04:11:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:29,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:29,167 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:11:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:11:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 04:11:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-15 04:11:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:29,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:29,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911895760] [2022-02-15 04:11:29,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [911895760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:29,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:29,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 04:11:29,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509924272] [2022-02-15 04:11:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:29,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 04:11:29,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 04:11:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:11:29,584 INFO L87 Difference]: Start difference. First operand 210 states and 223 transitions. Second operand has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:30,456 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-02-15 04:11:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 04:11:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 161 [2022-02-15 04:11:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:30,457 INFO L225 Difference]: With dead ends: 213 [2022-02-15 04:11:30,457 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 04:11:30,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 04:11:30,458 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 441 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:30,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 706 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:11:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 04:11:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 04:11:30,459 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) [2022-02-15 04:11:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 04:11:30,459 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2022-02-15 04:11:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:30,459 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 04:11:30,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 04:11:30,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 04:11:30,461 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:11:30,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 04:11:30,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.