/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:31:15,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:31:15,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:31:15,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:31:15,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 02:31:15,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 02:31:15,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 02:31:15,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 02:31:15,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 02:31:15,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 02:31:15,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 02:31:15,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 02:31:15,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 02:31:15,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 02:31:15,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 02:31:15,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 02:31:15,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 02:31:15,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:31:15,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:31:15,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:31:15,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 02:31:15,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:31:15,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:31:15,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:31:15,397 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:31:15,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:31:15,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:31:15,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:31:15,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:31:15,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:31:15,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:31:15,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:31:15,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:31:15,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:31:15,399 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:31:15,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:31:15,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:31:15,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:31:15,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:31:15,616 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:31:15,616 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:31:15,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-02-15 02:31:15,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b274e237c/0946907dd9124d638b2f02b8bc016c8e/FLAGdbcb37fa5 [2022-02-15 02:31:16,118 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:31:16,119 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-02-15 02:31:16,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b274e237c/0946907dd9124d638b2f02b8bc016c8e/FLAGdbcb37fa5 [2022-02-15 02:31:16,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b274e237c/0946907dd9124d638b2f02b8bc016c8e [2022-02-15 02:31:16,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:31:16,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:31:16,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:31:16,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:31:16,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:31:16,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9049c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16, skipping insertion in model container [2022-02-15 02:31:16,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:31:16,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:31:16,351 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/cdaudio_simpl1.cil-2.c[2073,2086] [2022-02-15 02:31:16,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:31:16,485 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:31:16,494 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/cdaudio_simpl1.cil-2.c[2073,2086] [2022-02-15 02:31:16,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:31:16,575 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:31:16,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16 WrapperNode [2022-02-15 02:31:16,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:31:16,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:31:16,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:31:16,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:31:16,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:31:16,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:31:16,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:31:16,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:31:16,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:31:16,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:31:16,705 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 02:31:16,719 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 02:31:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:31:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:31:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:31:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-15 02:31:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-15 02:31:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-02-15 02:31:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-02-15 02:31:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioStartDevice [2022-02-15 02:31:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPnp [2022-02-15 02:31:16,771 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioDeviceControl [2022-02-15 02:31:16,771 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-02-15 02:31:16,771 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-02-15 02:31:16,771 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio535DeviceControl [2022-02-15 02:31:16,772 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-02-15 02:31:16,772 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudio435DeviceControl [2022-02-15 02:31:16,774 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioAtapiDeviceControl [2022-02-15 02:31:16,774 INFO L138 BoogieDeclarations]: Found implementation of procedure HpCdrProcessLastSession [2022-02-15 02:31:16,774 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-02-15 02:31:16,774 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioHPCdrDeviceControl [2022-02-15 02:31:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-02-15 02:31:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioUnload [2022-02-15 02:31:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioPower [2022-02-15 02:31:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-15 02:31:16,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:31:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-15 02:31:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-15 02:31:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-15 02:31:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-15 02:31:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-15 02:31:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-02-15 02:31:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-15 02:31:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:31:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:31:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioStartDevice [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPnp [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioDeviceControl [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio535DeviceControl [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudio435DeviceControl [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioAtapiDeviceControl [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioHPCdrDeviceControl [2022-02-15 02:31:16,793 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioPower [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure HpCdrProcessLastSession [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioUnload [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:31:16,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:31:16,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:31:16,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:31:16,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:31:16,961 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:31:16,963 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:31:17,117 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,164 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-02-15 02:31:17,164 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-02-15 02:31:17,171 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,196 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-02-15 02:31:17,197 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-02-15 02:31:17,228 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,237 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-15 02:31:17,237 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-15 02:31:17,302 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,366 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-02-15 02:31:17,366 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: #res := 0; [2022-02-15 02:31:17,366 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-02-15 02:31:17,370 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,531 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-02-15 02:31:17,531 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-02-15 02:31:17,532 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,553 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-15 02:31:17,553 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-15 02:31:17,585 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,603 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2022-02-15 02:31:17,603 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2022-02-15 02:31:17,606 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,715 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-02-15 02:31:17,715 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-02-15 02:31:17,722 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,725 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,725 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,744 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:31:17,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:31:17,755 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 02:31:17,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:31:17 BoogieIcfgContainer [2022-02-15 02:31:17,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:31:17,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:31:17,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:31:17,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:31:17,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:31:16" (1/3) ... [2022-02-15 02:31:17,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6582e4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:31:17, skipping insertion in model container [2022-02-15 02:31:17,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (2/3) ... [2022-02-15 02:31:17,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6582e4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:31:17, skipping insertion in model container [2022-02-15 02:31:17,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:31:17" (3/3) ... [2022-02-15 02:31:17,767 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-02-15 02:31:17,771 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:31:17,775 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:31:17,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:31:17,814 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=JORDAN [2022-02-15 02:31:17,814 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:31:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 515 states, 382 states have (on average 1.486910994764398) internal successors, (568), 402 states have internal predecessors, (568), 102 states have call successors, (102), 29 states have call predecessors, (102), 29 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-02-15 02:31:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 02:31:17,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:17,855 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 02:31:17,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:17,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1874379495, now seen corresponding path program 1 times [2022-02-15 02:31:17,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:17,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222011730] [2022-02-15 02:31:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:17,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:17,917 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:18,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:18,257 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 02:31:18,258 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:18,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222011730] [2022-02-15 02:31:18,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [222011730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:18,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:18,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 02:31:18,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415505936] [2022-02-15 02:31:18,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:18,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 02:31:18,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 02:31:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:31:18,290 INFO L87 Difference]: Start difference. First operand has 515 states, 382 states have (on average 1.486910994764398) internal successors, (568), 402 states have internal predecessors, (568), 102 states have call successors, (102), 29 states have call predecessors, (102), 29 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:31:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:20,024 INFO L93 Difference]: Finished difference Result 1043 states and 1675 transitions. [2022-02-15 02:31:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:20,025 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), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-02-15 02:31:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:20,037 INFO L225 Difference]: With dead ends: 1043 [2022-02-15 02:31:20,037 INFO L226 Difference]: Without dead ends: 663 [2022-02-15 02:31:20,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:20,046 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 770 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:20,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1003 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:31:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-15 02:31:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 507. [2022-02-15 02:31:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 377 states have (on average 1.4562334217506632) internal successors, (549), 395 states have internal predecessors, (549), 102 states have call successors, (102), 29 states have call predecessors, (102), 27 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-02-15 02:31:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 737 transitions. [2022-02-15 02:31:20,163 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 737 transitions. Word has length 20 [2022-02-15 02:31:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:20,163 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 737 transitions. [2022-02-15 02:31:20,163 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), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:31:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 737 transitions. [2022-02-15 02:31:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:31:20,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:20,164 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 02:31:20,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:31:20,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash 950460732, now seen corresponding path program 1 times [2022-02-15 02:31:20,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:20,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617379733] [2022-02-15 02:31:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:20,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:20,168 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,289 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 02:31:20,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:20,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617379733] [2022-02-15 02:31:20,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [617379733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:20,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:20,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:20,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342543257] [2022-02-15 02:31:20,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:20,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:20,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:20,291 INFO L87 Difference]: Start difference. First operand 507 states and 737 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:21,979 INFO L93 Difference]: Finished difference Result 961 states and 1420 transitions. [2022-02-15 02:31:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 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 02:31:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:21,986 INFO L225 Difference]: With dead ends: 961 [2022-02-15 02:31:21,986 INFO L226 Difference]: Without dead ends: 842 [2022-02-15 02:31:21,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 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 02:31:21,988 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 1480 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:21,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1029 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:31:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-02-15 02:31:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 662. [2022-02-15 02:31:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 501 states have (on average 1.407185628742515) internal successors, (705), 508 states have internal predecessors, (705), 111 states have call successors, (111), 40 states have call predecessors, (111), 49 states have return successors, (145), 119 states have call predecessors, (145), 99 states have call successors, (145) [2022-02-15 02:31:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 961 transitions. [2022-02-15 02:31:22,060 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 961 transitions. Word has length 25 [2022-02-15 02:31:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:22,060 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 961 transitions. [2022-02-15 02:31:22,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 961 transitions. [2022-02-15 02:31:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 02:31:22,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:22,062 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] [2022-02-15 02:31:22,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:31:22,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash -356192423, now seen corresponding path program 1 times [2022-02-15 02:31:22,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:22,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254620173] [2022-02-15 02:31:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:22,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:22,065 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,218 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 02:31:22,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:22,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254620173] [2022-02-15 02:31:22,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254620173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:22,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:22,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:22,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941695332] [2022-02-15 02:31:22,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:22,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:22,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:22,220 INFO L87 Difference]: Start difference. First operand 662 states and 961 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:23,782 INFO L93 Difference]: Finished difference Result 1142 states and 1641 transitions. [2022-02-15 02:31:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-02-15 02:31:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:23,787 INFO L225 Difference]: With dead ends: 1142 [2022-02-15 02:31:23,787 INFO L226 Difference]: Without dead ends: 966 [2022-02-15 02:31:23,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 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 02:31:23,789 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 1133 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:23,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 861 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:31:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-02-15 02:31:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 787. [2022-02-15 02:31:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 610 states have (on average 1.4032786885245903) internal successors, (856), 613 states have internal predecessors, (856), 113 states have call successors, (113), 46 states have call predecessors, (113), 63 states have return successors, (163), 130 states have call predecessors, (163), 104 states have call successors, (163) [2022-02-15 02:31:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1132 transitions. [2022-02-15 02:31:23,863 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1132 transitions. Word has length 30 [2022-02-15 02:31:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:23,863 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1132 transitions. [2022-02-15 02:31:23,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1132 transitions. [2022-02-15 02:31:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 02:31:23,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:23,866 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 02:31:23,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:31:23,866 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash -175937744, now seen corresponding path program 1 times [2022-02-15 02:31:23,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:23,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560197379] [2022-02-15 02:31:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:23,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:23,869 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,976 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 02:31:23,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:23,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560197379] [2022-02-15 02:31:23,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560197379] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:23,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:23,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:23,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350717050] [2022-02-15 02:31:23,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:23,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:23,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:23,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:23,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:23,978 INFO L87 Difference]: Start difference. First operand 787 states and 1132 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 5 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 02:31:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:26,246 INFO L93 Difference]: Finished difference Result 1624 states and 2440 transitions. [2022-02-15 02:31:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:31:26,246 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), 2 states have call successors, (7), 5 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 31 [2022-02-15 02:31:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:26,255 INFO L225 Difference]: With dead ends: 1624 [2022-02-15 02:31:26,255 INFO L226 Difference]: Without dead ends: 1340 [2022-02-15 02:31:26,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 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 02:31:26,264 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 746 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:26,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1256 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:31:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-02-15 02:31:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 905. [2022-02-15 02:31:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 707 states have (on average 1.413012729844413) internal successors, (999), 709 states have internal predecessors, (999), 126 states have call successors, (126), 54 states have call predecessors, (126), 71 states have return successors, (220), 144 states have call predecessors, (220), 117 states have call successors, (220) [2022-02-15 02:31:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1345 transitions. [2022-02-15 02:31:26,356 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1345 transitions. Word has length 31 [2022-02-15 02:31:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:26,357 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1345 transitions. [2022-02-15 02:31:26,357 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), 2 states have call successors, (7), 5 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 02:31:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1345 transitions. [2022-02-15 02:31:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 02:31:26,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:26,361 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] [2022-02-15 02:31:26,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:31:26,362 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1397494507, now seen corresponding path program 1 times [2022-02-15 02:31:26,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:26,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491206226] [2022-02-15 02:31:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:26,365 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,601 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 02:31:26,601 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:26,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491206226] [2022-02-15 02:31:26,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [491206226] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:26,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:26,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:26,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825976311] [2022-02-15 02:31:26,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:26,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:26,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:26,602 INFO L87 Difference]: Start difference. First operand 905 states and 1345 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:31:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:28,435 INFO L93 Difference]: Finished difference Result 1626 states and 2474 transitions. [2022-02-15 02:31:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:28,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-02-15 02:31:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:28,440 INFO L225 Difference]: With dead ends: 1626 [2022-02-15 02:31:28,440 INFO L226 Difference]: Without dead ends: 1042 [2022-02-15 02:31:28,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:28,442 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 2487 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2493 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:28,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2493 Valid, 995 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:31:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-02-15 02:31:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 833. [2022-02-15 02:31:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 648 states have (on average 1.3981481481481481) internal successors, (906), 651 states have internal predecessors, (906), 117 states have call successors, (117), 50 states have call predecessors, (117), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-02-15 02:31:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1200 transitions. [2022-02-15 02:31:28,533 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1200 transitions. Word has length 32 [2022-02-15 02:31:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:28,533 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1200 transitions. [2022-02-15 02:31:28,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-15 02:31:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1200 transitions. [2022-02-15 02:31:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 02:31:28,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:28,534 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] [2022-02-15 02:31:28,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:31:28,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:28,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:28,535 INFO L85 PathProgramCache]: Analyzing trace with hash 913519719, now seen corresponding path program 1 times [2022-02-15 02:31:28,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:28,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401907242] [2022-02-15 02:31:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:28,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:28,537 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,650 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 02:31:28,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:28,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401907242] [2022-02-15 02:31:28,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1401907242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:28,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:28,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:28,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614922659] [2022-02-15 02:31:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:28,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:28,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:28,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:28,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:28,651 INFO L87 Difference]: Start difference. First operand 833 states and 1200 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:30,036 INFO L93 Difference]: Finished difference Result 963 states and 1422 transitions. [2022-02-15 02:31:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-02-15 02:31:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:30,041 INFO L225 Difference]: With dead ends: 963 [2022-02-15 02:31:30,041 INFO L226 Difference]: Without dead ends: 959 [2022-02-15 02:31:30,041 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 02:31:30,042 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 1150 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:30,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 952 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:31:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-15 02:31:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2022-02-15 02:31:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 648 states have (on average 1.3950617283950617) internal successors, (904), 650 states have internal predecessors, (904), 116 states have call successors, (116), 50 states have call predecessors, (116), 67 states have return successors, (177), 134 states have call predecessors, (177), 108 states have call successors, (177) [2022-02-15 02:31:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1197 transitions. [2022-02-15 02:31:30,121 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1197 transitions. Word has length 36 [2022-02-15 02:31:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:30,121 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1197 transitions. [2022-02-15 02:31:30,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1197 transitions. [2022-02-15 02:31:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 02:31:30,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:30,123 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] [2022-02-15 02:31:30,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:31:30,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1218065378, now seen corresponding path program 1 times [2022-02-15 02:31:30,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:30,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375040494] [2022-02-15 02:31:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:30,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:30,128 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,269 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 02:31:30,269 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:30,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375040494] [2022-02-15 02:31:30,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375040494] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:30,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:30,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:31:30,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800960202] [2022-02-15 02:31:30,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:30,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:31:30,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:30,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:31:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:31:30,271 INFO L87 Difference]: Start difference. First operand 832 states and 1197 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:31,895 INFO L93 Difference]: Finished difference Result 1409 states and 2012 transitions. [2022-02-15 02:31:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-02-15 02:31:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:31,900 INFO L225 Difference]: With dead ends: 1409 [2022-02-15 02:31:31,900 INFO L226 Difference]: Without dead ends: 993 [2022-02-15 02:31:31,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:31,901 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:31,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 1232 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:31:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-02-15 02:31:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 734. [2022-02-15 02:31:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 570 states have (on average 1.3859649122807018) internal successors, (790), 573 states have internal predecessors, (790), 105 states have call successors, (105), 45 states have call predecessors, (105), 58 states have return successors, (131), 118 states have call predecessors, (131), 97 states have call successors, (131) [2022-02-15 02:31:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1026 transitions. [2022-02-15 02:31:31,981 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1026 transitions. Word has length 39 [2022-02-15 02:31:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:31,981 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1026 transitions. [2022-02-15 02:31:31,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1026 transitions. [2022-02-15 02:31:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:31:31,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:31,983 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 02:31:31,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:31:31,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1427323864, now seen corresponding path program 1 times [2022-02-15 02:31:31,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:31,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356930507] [2022-02-15 02:31:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:31,985 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,131 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 02:31:32,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:32,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356930507] [2022-02-15 02:31:32,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356930507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:32,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:32,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:32,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174559550] [2022-02-15 02:31:32,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:32,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:32,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:32,132 INFO L87 Difference]: Start difference. First operand 734 states and 1026 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, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:33,420 INFO L93 Difference]: Finished difference Result 975 states and 1402 transitions. [2022-02-15 02:31:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:33,421 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, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-02-15 02:31:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:33,425 INFO L225 Difference]: With dead ends: 975 [2022-02-15 02:31:33,425 INFO L226 Difference]: Without dead ends: 957 [2022-02-15 02:31:33,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 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 02:31:33,426 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1139 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:33,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 749 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:31:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-15 02:31:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 754. [2022-02-15 02:31:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 588 states have (on average 1.3962585034013606) internal successors, (821), 600 states have internal predecessors, (821), 107 states have call successors, (107), 48 states have call predecessors, (107), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-02-15 02:31:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1052 transitions. [2022-02-15 02:31:33,530 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1052 transitions. Word has length 40 [2022-02-15 02:31:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:33,531 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1052 transitions. [2022-02-15 02:31:33,531 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, (9), 6 states have call predecessors, (9), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1052 transitions. [2022-02-15 02:31:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:31:33,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:33,538 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 02:31:33,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:31:33,539 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash -638398730, now seen corresponding path program 1 times [2022-02-15 02:31:33,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:33,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670814831] [2022-02-15 02:31:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:33,541 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-15 02:31:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,653 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 02:31:33,653 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:33,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670814831] [2022-02-15 02:31:33,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [670814831] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:33,653 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:33,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:31:33,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854282706] [2022-02-15 02:31:33,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:33,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:31:33,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:31:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:31:33,655 INFO L87 Difference]: Start difference. First operand 754 states and 1052 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:35,245 INFO L93 Difference]: Finished difference Result 1159 states and 1659 transitions. [2022-02-15 02:31:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:31:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-02-15 02:31:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:35,249 INFO L225 Difference]: With dead ends: 1159 [2022-02-15 02:31:35,249 INFO L226 Difference]: Without dead ends: 934 [2022-02-15 02:31:35,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:35,250 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 921 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:35,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1341 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:31:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-02-15 02:31:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 754. [2022-02-15 02:31:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 588 states have (on average 1.3945578231292517) internal successors, (820), 600 states have internal predecessors, (820), 107 states have call successors, (107), 48 states have call predecessors, (107), 58 states have return successors, (124), 110 states have call predecessors, (124), 100 states have call successors, (124) [2022-02-15 02:31:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1051 transitions. [2022-02-15 02:31:35,349 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1051 transitions. Word has length 46 [2022-02-15 02:31:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:35,349 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1051 transitions. [2022-02-15 02:31:35,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 7 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1051 transitions. [2022-02-15 02:31:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 02:31:35,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:35,352 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 02:31:35,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:31:35,352 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash 904959916, now seen corresponding path program 1 times [2022-02-15 02:31:35,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:35,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445717116] [2022-02-15 02:31:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:35,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:35,355 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 02:31:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,474 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 02:31:35,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:35,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445717116] [2022-02-15 02:31:35,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445717116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:35,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:35,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:31:35,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142678715] [2022-02-15 02:31:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:35,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:31:35,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:31:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:31:35,475 INFO L87 Difference]: Start difference. First operand 754 states and 1051 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:36,289 INFO L93 Difference]: Finished difference Result 956 states and 1371 transitions. [2022-02-15 02:31:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:31:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-02-15 02:31:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:36,292 INFO L225 Difference]: With dead ends: 956 [2022-02-15 02:31:36,292 INFO L226 Difference]: Without dead ends: 889 [2022-02-15 02:31:36,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 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 02:31:36,293 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1894 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:36,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 1086 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-15 02:31:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 743. [2022-02-15 02:31:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 581 states have (on average 1.395869191049914) internal successors, (811), 593 states have internal predecessors, (811), 105 states have call successors, (105), 46 states have call predecessors, (105), 56 states have return successors, (122), 108 states have call predecessors, (122), 98 states have call successors, (122) [2022-02-15 02:31:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1038 transitions. [2022-02-15 02:31:36,390 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1038 transitions. Word has length 47 [2022-02-15 02:31:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:36,391 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1038 transitions. [2022-02-15 02:31:36,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 7 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1038 transitions. [2022-02-15 02:31:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 02:31:36,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:36,392 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 02:31:36,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:31:36,392 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:36,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2108919237, now seen corresponding path program 1 times [2022-02-15 02:31:36,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:36,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501690778] [2022-02-15 02:31:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:36,395 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,522 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 02:31:36,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:36,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501690778] [2022-02-15 02:31:36,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501690778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:36,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:36,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:31:36,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117755482] [2022-02-15 02:31:36,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:36,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:31:36,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:31:36,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:36,524 INFO L87 Difference]: Start difference. First operand 743 states and 1038 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 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 02:31:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:38,675 INFO L93 Difference]: Finished difference Result 1059 states and 1503 transitions. [2022-02-15 02:31:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:31:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 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 48 [2022-02-15 02:31:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:38,680 INFO L225 Difference]: With dead ends: 1059 [2022-02-15 02:31:38,680 INFO L226 Difference]: Without dead ends: 998 [2022-02-15 02:31:38,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:31:38,682 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 1792 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 2029 SdHoareTripleChecker+Invalid, 3409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:38,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 2029 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:31:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-15 02:31:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 786. [2022-02-15 02:31:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 616 states have (on average 1.3944805194805194) internal successors, (859), 627 states have internal predecessors, (859), 109 states have call successors, (109), 49 states have call predecessors, (109), 60 states have return successors, (131), 114 states have call predecessors, (131), 102 states have call successors, (131) [2022-02-15 02:31:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1099 transitions. [2022-02-15 02:31:38,821 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1099 transitions. Word has length 48 [2022-02-15 02:31:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:38,821 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1099 transitions. [2022-02-15 02:31:38,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 7 states have internal predecessors, (36), 4 states have call successors, (7), 6 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 02:31:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1099 transitions. [2022-02-15 02:31:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 02:31:38,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:38,823 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 02:31:38,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:31:38,823 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash -893181664, now seen corresponding path program 1 times [2022-02-15 02:31:38,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:38,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272100420] [2022-02-15 02:31:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:38,825 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,933 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 02:31:38,933 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:38,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272100420] [2022-02-15 02:31:38,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [272100420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:38,933 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:38,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:31:38,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029954936] [2022-02-15 02:31:38,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:38,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:31:38,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:38,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:31:38,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:31:38,934 INFO L87 Difference]: Start difference. First operand 786 states and 1099 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 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 02:31:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:40,548 INFO L93 Difference]: Finished difference Result 1094 states and 1563 transitions. [2022-02-15 02:31:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:31:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 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 50 [2022-02-15 02:31:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:40,552 INFO L225 Difference]: With dead ends: 1094 [2022-02-15 02:31:40,552 INFO L226 Difference]: Without dead ends: 1083 [2022-02-15 02:31:40,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:40,553 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1242 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:40,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 1378 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:31:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-02-15 02:31:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 860. [2022-02-15 02:31:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 672 states have (on average 1.3675595238095237) internal successors, (919), 678 states have internal predecessors, (919), 111 states have call successors, (111), 51 states have call predecessors, (111), 76 states have return successors, (154), 137 states have call predecessors, (154), 104 states have call successors, (154) [2022-02-15 02:31:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1184 transitions. [2022-02-15 02:31:40,678 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1184 transitions. Word has length 50 [2022-02-15 02:31:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:40,679 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1184 transitions. [2022-02-15 02:31:40,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 6 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 02:31:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1184 transitions. [2022-02-15 02:31:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 02:31:40,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:40,681 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 02:31:40,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:31:40,681 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:40,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1039874466, now seen corresponding path program 1 times [2022-02-15 02:31:40,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:40,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264045678] [2022-02-15 02:31:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:40,684 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,899 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 02:31:40,900 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:40,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264045678] [2022-02-15 02:31:40,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264045678] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:40,900 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:40,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:40,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382380277] [2022-02-15 02:31:40,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:40,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:40,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:40,901 INFO L87 Difference]: Start difference. First operand 860 states and 1184 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 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 02:31:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:43,189 INFO L93 Difference]: Finished difference Result 1020 states and 1443 transitions. [2022-02-15 02:31:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 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 02:31:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:43,194 INFO L225 Difference]: With dead ends: 1020 [2022-02-15 02:31:43,194 INFO L226 Difference]: Without dead ends: 957 [2022-02-15 02:31:43,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:31:43,197 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 2232 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2241 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:43,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2241 Valid, 1785 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 02:31:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-15 02:31:43,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 837. [2022-02-15 02:31:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 653 states have (on average 1.3721286370597243) internal successors, (896), 666 states have internal predecessors, (896), 111 states have call successors, (111), 51 states have call predecessors, (111), 72 states have return successors, (143), 126 states have call predecessors, (143), 104 states have call successors, (143) [2022-02-15 02:31:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1150 transitions. [2022-02-15 02:31:43,343 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1150 transitions. Word has length 50 [2022-02-15 02:31:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:43,344 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1150 transitions. [2022-02-15 02:31:43,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (7), 6 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 02:31:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1150 transitions. [2022-02-15 02:31:43,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:31:43,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:43,346 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 02:31:43,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:31:43,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 147300495, now seen corresponding path program 1 times [2022-02-15 02:31:43,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:43,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719378513] [2022-02-15 02:31:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:43,348 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,500 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 02:31:43,500 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:43,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719378513] [2022-02-15 02:31:43,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719378513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:43,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:43,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:43,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20748997] [2022-02-15 02:31:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:43,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:43,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:43,502 INFO L87 Difference]: Start difference. First operand 837 states and 1150 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:45,321 INFO L93 Difference]: Finished difference Result 982 states and 1391 transitions. [2022-02-15 02:31:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:31:45,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-02-15 02:31:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:45,324 INFO L225 Difference]: With dead ends: 982 [2022-02-15 02:31:45,324 INFO L226 Difference]: Without dead ends: 977 [2022-02-15 02:31:45,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 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 02:31:45,325 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 1534 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:45,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1435 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:31:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-02-15 02:31:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 855. [2022-02-15 02:31:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 668 states have (on average 1.3682634730538923) internal successors, (914), 682 states have internal predecessors, (914), 112 states have call successors, (112), 52 states have call predecessors, (112), 74 states have return successors, (145), 128 states have call predecessors, (145), 105 states have call successors, (145) [2022-02-15 02:31:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1171 transitions. [2022-02-15 02:31:45,462 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1171 transitions. Word has length 52 [2022-02-15 02:31:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:45,462 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1171 transitions. [2022-02-15 02:31:45,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1171 transitions. [2022-02-15 02:31:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:31:45,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:45,482 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 02:31:45,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:31:45,482 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash 926676691, now seen corresponding path program 1 times [2022-02-15 02:31:45,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:45,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205911676] [2022-02-15 02:31:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:45,486 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:31:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 02:31:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,599 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 02:31:45,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:45,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205911676] [2022-02-15 02:31:45,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205911676] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:45,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:45,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:45,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189796343] [2022-02-15 02:31:45,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:45,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:45,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:45,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:45,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:45,601 INFO L87 Difference]: Start difference. First operand 855 states and 1171 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:47,368 INFO L93 Difference]: Finished difference Result 1188 states and 1671 transitions. [2022-02-15 02:31:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2022-02-15 02:31:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:47,383 INFO L225 Difference]: With dead ends: 1188 [2022-02-15 02:31:47,383 INFO L226 Difference]: Without dead ends: 947 [2022-02-15 02:31:47,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:47,385 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1034 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:47,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1163 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:31:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-02-15 02:31:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 827. [2022-02-15 02:31:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 647 states have (on average 1.3663060278207109) internal successors, (884), 659 states have internal predecessors, (884), 110 states have call successors, (110), 51 states have call predecessors, (110), 69 states have return successors, (140), 123 states have call predecessors, (140), 104 states have call successors, (140) [2022-02-15 02:31:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1134 transitions. [2022-02-15 02:31:47,523 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1134 transitions. Word has length 54 [2022-02-15 02:31:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:47,524 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1134 transitions. [2022-02-15 02:31:47,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1134 transitions. [2022-02-15 02:31:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:31:47,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:47,525 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 02:31:47,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:31:47,526 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1474957070, now seen corresponding path program 1 times [2022-02-15 02:31:47,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:47,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563199942] [2022-02-15 02:31:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:47,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:47,528 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,675 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 02:31:47,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:47,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563199942] [2022-02-15 02:31:47,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [563199942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:47,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:47,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:47,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935923475] [2022-02-15 02:31:47,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:47,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:47,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:47,677 INFO L87 Difference]: Start difference. First operand 827 states and 1134 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 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 02:31:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:50,457 INFO L93 Difference]: Finished difference Result 962 states and 1364 transitions. [2022-02-15 02:31:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:50,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 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 02:31:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:50,460 INFO L225 Difference]: With dead ends: 962 [2022-02-15 02:31:50,460 INFO L226 Difference]: Without dead ends: 958 [2022-02-15 02:31:50,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:50,461 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 371 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 4881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:50,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 2378 Invalid, 4881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 02:31:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-02-15 02:31:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 834. [2022-02-15 02:31:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 653 states have (on average 1.3644716692189893) internal successors, (891), 666 states have internal predecessors, (891), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-02-15 02:31:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1143 transitions. [2022-02-15 02:31:50,600 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1143 transitions. Word has length 51 [2022-02-15 02:31:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:50,601 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1143 transitions. [2022-02-15 02:31:50,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 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 02:31:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1143 transitions. [2022-02-15 02:31:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:31:50,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:50,603 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 02:31:50,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:31:50,603 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:50,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233900, now seen corresponding path program 1 times [2022-02-15 02:31:50,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:50,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710454281] [2022-02-15 02:31:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:50,605 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,761 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 02:31:50,761 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:50,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710454281] [2022-02-15 02:31:50,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [710454281] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:50,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:50,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:50,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464914248] [2022-02-15 02:31:50,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:50,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:50,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:50,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:50,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:50,762 INFO L87 Difference]: Start difference. First operand 834 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 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 02:31:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:53,066 INFO L93 Difference]: Finished difference Result 977 states and 1380 transitions. [2022-02-15 02:31:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 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 02:31:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:53,070 INFO L225 Difference]: With dead ends: 977 [2022-02-15 02:31:53,070 INFO L226 Difference]: Without dead ends: 953 [2022-02-15 02:31:53,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:53,071 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 737 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3839 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 3839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:53,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 2436 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 3839 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:31:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-02-15 02:31:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 833. [2022-02-15 02:31:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 652 states have (on average 1.3634969325153374) internal successors, (889), 665 states have internal predecessors, (889), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-02-15 02:31:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1141 transitions. [2022-02-15 02:31:53,217 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1141 transitions. Word has length 51 [2022-02-15 02:31:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:53,217 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1141 transitions. [2022-02-15 02:31:53,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 6 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 02:31:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1141 transitions. [2022-02-15 02:31:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 02:31:53,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:53,219 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 02:31:53,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:31:53,219 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash 714941957, now seen corresponding path program 1 times [2022-02-15 02:31:53,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:53,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181457075] [2022-02-15 02:31:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:53,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:53,221 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,424 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 02:31:53,424 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:53,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181457075] [2022-02-15 02:31:53,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [181457075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:53,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:53,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:53,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032123275] [2022-02-15 02:31:53,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:53,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:53,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:53,425 INFO L87 Difference]: Start difference. First operand 833 states and 1141 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:55,791 INFO L93 Difference]: Finished difference Result 963 states and 1362 transitions. [2022-02-15 02:31:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:55,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-02-15 02:31:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:55,795 INFO L225 Difference]: With dead ends: 963 [2022-02-15 02:31:55,795 INFO L226 Difference]: Without dead ends: 957 [2022-02-15 02:31:55,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:31:55,796 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1931 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:55,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1957 Valid, 1476 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 02:31:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-15 02:31:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 833. [2022-02-15 02:31:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 652 states have (on average 1.361963190184049) internal successors, (888), 665 states have internal predecessors, (888), 111 states have call successors, (111), 51 states have call predecessors, (111), 69 states have return successors, (141), 124 states have call predecessors, (141), 105 states have call successors, (141) [2022-02-15 02:31:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1140 transitions. [2022-02-15 02:31:55,979 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1140 transitions. Word has length 53 [2022-02-15 02:31:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:55,979 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1140 transitions. [2022-02-15 02:31:55,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1140 transitions. [2022-02-15 02:31:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:31:55,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:55,981 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 02:31:55,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:31:55,981 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash 345342278, now seen corresponding path program 1 times [2022-02-15 02:31:55,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:55,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127350660] [2022-02-15 02:31:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:55,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:55,983 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,148 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 02:31:56,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:56,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127350660] [2022-02-15 02:31:56,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [127350660] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:56,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:56,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:56,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141424887] [2022-02-15 02:31:56,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:56,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:56,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:56,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:56,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:56,149 INFO L87 Difference]: Start difference. First operand 833 states and 1140 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 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 02:31:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:57,984 INFO L93 Difference]: Finished difference Result 967 states and 1365 transitions. [2022-02-15 02:31:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:31:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 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 52 [2022-02-15 02:31:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:57,987 INFO L225 Difference]: With dead ends: 967 [2022-02-15 02:31:57,987 INFO L226 Difference]: Without dead ends: 931 [2022-02-15 02:31:57,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:31:57,988 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 2284 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:57,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 1257 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:31:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-15 02:31:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 805. [2022-02-15 02:31:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 629 states have (on average 1.370429252782194) internal successors, (862), 641 states have internal predecessors, (862), 108 states have call successors, (108), 49 states have call predecessors, (108), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-02-15 02:31:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1108 transitions. [2022-02-15 02:31:58,143 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1108 transitions. Word has length 52 [2022-02-15 02:31:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:58,143 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1108 transitions. [2022-02-15 02:31:58,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 6 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 02:31:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1108 transitions. [2022-02-15 02:31:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:31:58,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:58,144 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 02:31:58,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:31:58,145 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash 56348596, now seen corresponding path program 1 times [2022-02-15 02:31:58,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:58,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9220828] [2022-02-15 02:31:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:58,147 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,374 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 02:31:58,374 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:58,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9220828] [2022-02-15 02:31:58,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [9220828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:58,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:58,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:58,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096645246] [2022-02-15 02:31:58,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:58,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:58,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:58,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:58,376 INFO L87 Difference]: Start difference. First operand 805 states and 1108 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:32:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:00,217 INFO L93 Difference]: Finished difference Result 933 states and 1327 transitions. [2022-02-15 02:32:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:32:00,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-02-15 02:32:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:00,221 INFO L225 Difference]: With dead ends: 933 [2022-02-15 02:32:00,221 INFO L226 Difference]: Without dead ends: 927 [2022-02-15 02:32:00,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:32:00,222 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 2924 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2950 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:00,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2950 Valid, 1295 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:32:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-02-15 02:32:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 805. [2022-02-15 02:32:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 629 states have (on average 1.368839427662957) internal successors, (861), 641 states have internal predecessors, (861), 108 states have call successors, (108), 49 states have call predecessors, (108), 67 states have return successors, (138), 121 states have call predecessors, (138), 102 states have call successors, (138) [2022-02-15 02:32:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1107 transitions. [2022-02-15 02:32:00,409 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1107 transitions. Word has length 54 [2022-02-15 02:32:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:00,410 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1107 transitions. [2022-02-15 02:32:00,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (8), 8 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:32:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1107 transitions. [2022-02-15 02:32:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:32:00,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:00,411 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 02:32:00,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:32:00,411 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2058958222, now seen corresponding path program 1 times [2022-02-15 02:32:00,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:00,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717020720] [2022-02-15 02:32:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:00,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:00,415 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,599 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 02:32:00,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:00,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717020720] [2022-02-15 02:32:00,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [717020720] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:00,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:00,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:00,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507789380] [2022-02-15 02:32:00,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:00,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:00,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:00,600 INFO L87 Difference]: Start difference. First operand 805 states and 1107 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 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 02:32:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:02,847 INFO L93 Difference]: Finished difference Result 956 states and 1356 transitions. [2022-02-15 02:32:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:32:02,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 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 55 [2022-02-15 02:32:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:02,851 INFO L225 Difference]: With dead ends: 956 [2022-02-15 02:32:02,851 INFO L226 Difference]: Without dead ends: 916 [2022-02-15 02:32:02,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:02,852 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 1419 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 4556 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 5125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 4556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:02,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 2655 Invalid, 5125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 4556 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 02:32:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-02-15 02:32:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 796. [2022-02-15 02:32:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 622 states have (on average 1.3520900321543408) internal successors, (841), 634 states have internal predecessors, (841), 106 states have call successors, (106), 49 states have call predecessors, (106), 67 states have return successors, (136), 119 states have call predecessors, (136), 100 states have call successors, (136) [2022-02-15 02:32:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1083 transitions. [2022-02-15 02:32:03,021 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1083 transitions. Word has length 55 [2022-02-15 02:32:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:03,021 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1083 transitions. [2022-02-15 02:32:03,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 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 02:32:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1083 transitions. [2022-02-15 02:32:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 02:32:03,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:03,024 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] [2022-02-15 02:32:03,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:32:03,024 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash 369563974, now seen corresponding path program 1 times [2022-02-15 02:32:03,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:03,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450323198] [2022-02-15 02:32:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:03,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:03,026 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:32:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,289 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 02:32:03,290 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:03,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450323198] [2022-02-15 02:32:03,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450323198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:03,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:03,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:03,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913308776] [2022-02-15 02:32:03,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:03,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:03,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:03,291 INFO L87 Difference]: Start difference. First operand 796 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:05,587 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2022-02-15 02:32:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2022-02-15 02:32:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:05,614 INFO L225 Difference]: With dead ends: 932 [2022-02-15 02:32:05,615 INFO L226 Difference]: Without dead ends: 914 [2022-02-15 02:32:05,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:05,616 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 991 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 5078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:05,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 2775 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:32:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-02-15 02:32:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 794. [2022-02-15 02:32:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 621 states have (on average 1.3510466988727858) internal successors, (839), 633 states have internal predecessors, (839), 105 states have call successors, (105), 49 states have call predecessors, (105), 67 states have return successors, (135), 118 states have call predecessors, (135), 99 states have call successors, (135) [2022-02-15 02:32:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1079 transitions. [2022-02-15 02:32:05,785 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1079 transitions. Word has length 56 [2022-02-15 02:32:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:05,786 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1079 transitions. [2022-02-15 02:32:05,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1079 transitions. [2022-02-15 02:32:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:32:05,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:05,787 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 02:32:05,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:32:05,788 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1588510132, now seen corresponding path program 1 times [2022-02-15 02:32:05,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:05,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522097241] [2022-02-15 02:32:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:05,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:05,790 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:32:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:05,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:05,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522097241] [2022-02-15 02:32:05,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522097241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:05,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:05,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:05,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465315545] [2022-02-15 02:32:05,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:05,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:05,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:05,964 INFO L87 Difference]: Start difference. First operand 794 states and 1079 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:07,950 INFO L93 Difference]: Finished difference Result 927 states and 1303 transitions. [2022-02-15 02:32:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-02-15 02:32:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:07,954 INFO L225 Difference]: With dead ends: 927 [2022-02-15 02:32:07,954 INFO L226 Difference]: Without dead ends: 909 [2022-02-15 02:32:07,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:07,955 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 363 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:07,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 2581 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4700 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:32:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-02-15 02:32:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 789. [2022-02-15 02:32:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 618 states have (on average 1.3511326860841424) internal successors, (835), 630 states have internal predecessors, (835), 104 states have call successors, (104), 49 states have call predecessors, (104), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-02-15 02:32:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1072 transitions. [2022-02-15 02:32:08,142 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1072 transitions. Word has length 55 [2022-02-15 02:32:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:08,142 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1072 transitions. [2022-02-15 02:32:08,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1072 transitions. [2022-02-15 02:32:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 02:32:08,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:08,144 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] [2022-02-15 02:32:08,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:32:08,144 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash 170307092, now seen corresponding path program 1 times [2022-02-15 02:32:08,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:08,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757631870] [2022-02-15 02:32:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:08,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:08,146 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,265 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 02:32:08,265 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:08,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757631870] [2022-02-15 02:32:08,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [757631870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:08,265 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:08,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:32:08,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631239126] [2022-02-15 02:32:08,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:08,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:32:08,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:32:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:32:08,266 INFO L87 Difference]: Start difference. First operand 789 states and 1072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:32:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:10,456 INFO L93 Difference]: Finished difference Result 974 states and 1354 transitions. [2022-02-15 02:32:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:32:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-02-15 02:32:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:10,459 INFO L225 Difference]: With dead ends: 974 [2022-02-15 02:32:10,459 INFO L226 Difference]: Without dead ends: 931 [2022-02-15 02:32:10,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:32:10,460 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 1170 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:10,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 1314 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 02:32:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-15 02:32:10,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 789. [2022-02-15 02:32:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 618 states have (on average 1.3495145631067962) internal successors, (834), 630 states have internal predecessors, (834), 104 states have call successors, (104), 49 states have call predecessors, (104), 66 states have return successors, (133), 116 states have call predecessors, (133), 98 states have call successors, (133) [2022-02-15 02:32:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1071 transitions. [2022-02-15 02:32:10,636 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1071 transitions. Word has length 56 [2022-02-15 02:32:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:10,636 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1071 transitions. [2022-02-15 02:32:10,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:32:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1071 transitions. [2022-02-15 02:32:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:32:10,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:10,638 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-15 02:32:10,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:32:10,638 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1014540615, now seen corresponding path program 1 times [2022-02-15 02:32:10,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:10,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888314197] [2022-02-15 02:32:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:10,641 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:32:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:32:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:10,781 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 02:32:10,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:10,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888314197] [2022-02-15 02:32:10,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888314197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:10,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:10,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:32:10,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495615813] [2022-02-15 02:32:10,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:32:10,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:32:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:32:10,783 INFO L87 Difference]: Start difference. First operand 789 states and 1071 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:12,016 INFO L93 Difference]: Finished difference Result 1224 states and 1667 transitions. [2022-02-15 02:32:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:32:12,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 73 [2022-02-15 02:32:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:12,019 INFO L225 Difference]: With dead ends: 1224 [2022-02-15 02:32:12,019 INFO L226 Difference]: Without dead ends: 778 [2022-02-15 02:32:12,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:32:12,021 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 1764 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:12,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1764 Valid, 797 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:32:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-15 02:32:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-02-15 02:32:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 609 states have (on average 1.341543513957307) internal successors, (817), 620 states have internal predecessors, (817), 103 states have call successors, (103), 49 states have call predecessors, (103), 65 states have return successors, (122), 115 states have call predecessors, (122), 97 states have call successors, (122) [2022-02-15 02:32:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1042 transitions. [2022-02-15 02:32:12,218 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1042 transitions. Word has length 73 [2022-02-15 02:32:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:12,218 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1042 transitions. [2022-02-15 02:32:12,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1042 transitions. [2022-02-15 02:32:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:32:12,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:12,220 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] [2022-02-15 02:32:12,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:32:12,220 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1574836108, now seen corresponding path program 1 times [2022-02-15 02:32:12,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:12,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292084995] [2022-02-15 02:32:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:12,222 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:12,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:12,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:12,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:32:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:12,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:12,344 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 02:32:12,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:12,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292084995] [2022-02-15 02:32:12,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [292084995] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:12,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:12,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:32:12,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087876606] [2022-02-15 02:32:12,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:12,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:32:12,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:32:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:32:12,346 INFO L87 Difference]: Start difference. First operand 778 states and 1042 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:13,608 INFO L93 Difference]: Finished difference Result 911 states and 1202 transitions. [2022-02-15 02:32:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:32:13,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-02-15 02:32:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:13,611 INFO L225 Difference]: With dead ends: 911 [2022-02-15 02:32:13,611 INFO L226 Difference]: Without dead ends: 820 [2022-02-15 02:32:13,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:32:13,612 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1177 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:13,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1027 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:32:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-02-15 02:32:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 788. [2022-02-15 02:32:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 616 states have (on average 1.3327922077922079) internal successors, (821), 627 states have internal predecessors, (821), 103 states have call successors, (103), 51 states have call predecessors, (103), 68 states have return successors, (124), 116 states have call predecessors, (124), 98 states have call successors, (124) [2022-02-15 02:32:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1048 transitions. [2022-02-15 02:32:13,815 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1048 transitions. Word has length 61 [2022-02-15 02:32:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:13,816 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1048 transitions. [2022-02-15 02:32:13,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1048 transitions. [2022-02-15 02:32:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 02:32:13,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:13,817 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] [2022-02-15 02:32:13,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:32:13,817 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:13,818 INFO L85 PathProgramCache]: Analyzing trace with hash 163789660, now seen corresponding path program 1 times [2022-02-15 02:32:13,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:13,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122705962] [2022-02-15 02:32:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:13,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:13,820 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:13,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:13,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:13,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:14,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:32:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:14,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:14,104 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 02:32:14,104 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:14,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122705962] [2022-02-15 02:32:14,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [122705962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:14,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:14,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:32:14,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473296161] [2022-02-15 02:32:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:14,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:32:14,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:14,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:32:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:32:14,107 INFO L87 Difference]: Start difference. First operand 788 states and 1048 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:16,773 INFO L93 Difference]: Finished difference Result 814 states and 1076 transitions. [2022-02-15 02:32:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:32:16,774 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 62 [2022-02-15 02:32:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:16,776 INFO L225 Difference]: With dead ends: 814 [2022-02-15 02:32:16,776 INFO L226 Difference]: Without dead ends: 790 [2022-02-15 02:32:16,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:32:16,777 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 709 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 5602 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 5858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 5602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:16,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 2390 Invalid, 5858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 5602 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:32:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-02-15 02:32:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 786. [2022-02-15 02:32:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 615 states have (on average 1.3317073170731708) internal successors, (819), 626 states have internal predecessors, (819), 102 states have call successors, (102), 51 states have call predecessors, (102), 68 states have return successors, (123), 115 states have call predecessors, (123), 97 states have call successors, (123) [2022-02-15 02:32:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1044 transitions. [2022-02-15 02:32:16,984 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1044 transitions. Word has length 62 [2022-02-15 02:32:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:16,984 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1044 transitions. [2022-02-15 02:32:16,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1044 transitions. [2022-02-15 02:32:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 02:32:16,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:16,986 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 02:32:16,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:32:16,986 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:16,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:16,986 INFO L85 PathProgramCache]: Analyzing trace with hash -939525102, now seen corresponding path program 1 times [2022-02-15 02:32:16,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:16,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285135382] [2022-02-15 02:32:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:16,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:16,988 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:17,254 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 02:32:17,254 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:17,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285135382] [2022-02-15 02:32:17,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [285135382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:17,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:17,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:32:17,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429559945] [2022-02-15 02:32:17,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:17,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:32:17,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:32:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:32:17,255 INFO L87 Difference]: Start difference. First operand 786 states and 1044 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:19,812 INFO L93 Difference]: Finished difference Result 812 states and 1072 transitions. [2022-02-15 02:32:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:32:19,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2022-02-15 02:32:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:19,815 INFO L225 Difference]: With dead ends: 812 [2022-02-15 02:32:19,815 INFO L226 Difference]: Without dead ends: 787 [2022-02-15 02:32:19,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:32:19,816 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 717 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 5342 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 5594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 5342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:19,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2154 Invalid, 5594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 5342 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:32:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-02-15 02:32:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 785. [2022-02-15 02:32:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 614 states have (on average 1.3159609120521172) internal successors, (808), 625 states have internal predecessors, (808), 102 states have call successors, (102), 51 states have call predecessors, (102), 68 states have return successors, (123), 115 states have call predecessors, (123), 97 states have call successors, (123) [2022-02-15 02:32:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1033 transitions. [2022-02-15 02:32:19,996 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1033 transitions. Word has length 59 [2022-02-15 02:32:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:19,996 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1033 transitions. [2022-02-15 02:32:19,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1033 transitions. [2022-02-15 02:32:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:32:19,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:19,997 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:32:19,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:32:19,997 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1364943258, now seen corresponding path program 1 times [2022-02-15 02:32:19,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:19,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197162195] [2022-02-15 02:32:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:19,999 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:20,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:20,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:20,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:20,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:20,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:20,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:20,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197162195] [2022-02-15 02:32:20,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197162195] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:20,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:20,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:32:20,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528707159] [2022-02-15 02:32:20,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:20,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:32:20,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:20,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:32:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:20,232 INFO L87 Difference]: Start difference. First operand 785 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:22,535 INFO L93 Difference]: Finished difference Result 802 states and 1051 transitions. [2022-02-15 02:32:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:32:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-02-15 02:32:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:22,540 INFO L225 Difference]: With dead ends: 802 [2022-02-15 02:32:22,540 INFO L226 Difference]: Without dead ends: 782 [2022-02-15 02:32:22,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:32:22,544 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 641 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 5104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 4881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:22,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 2143 Invalid, 5104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 4881 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:32:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-15 02:32:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2022-02-15 02:32:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 612 states have (on average 1.315359477124183) internal successors, (805), 623 states have internal predecessors, (805), 101 states have call successors, (101), 51 states have call predecessors, (101), 68 states have return successors, (122), 114 states have call predecessors, (122), 96 states have call successors, (122) [2022-02-15 02:32:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1028 transitions. [2022-02-15 02:32:22,774 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1028 transitions. Word has length 58 [2022-02-15 02:32:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:22,774 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1028 transitions. [2022-02-15 02:32:22,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:32:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1028 transitions. [2022-02-15 02:32:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 02:32:22,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:22,775 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 02:32:22,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:32:22,776 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash 483454952, now seen corresponding path program 1 times [2022-02-15 02:32:22,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:22,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226928582] [2022-02-15 02:32:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:22,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:22,778 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:22,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:22,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:22,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:22,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:23,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:32:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:23,015 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 02:32:23,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:23,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226928582] [2022-02-15 02:32:23,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [226928582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:23,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:23,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:32:23,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892211055] [2022-02-15 02:32:23,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:23,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:32:23,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:23,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:32:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:23,016 INFO L87 Difference]: Start difference. First operand 782 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 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 02:32:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:24,957 INFO L93 Difference]: Finished difference Result 835 states and 1083 transitions. [2022-02-15 02:32:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:32:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 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 02:32:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:24,959 INFO L225 Difference]: With dead ends: 835 [2022-02-15 02:32:24,959 INFO L226 Difference]: Without dead ends: 770 [2022-02-15 02:32:24,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:32:24,960 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 963 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 4086 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 4432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 4086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:24,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1937 Invalid, 4432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 4086 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:32:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-15 02:32:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2022-02-15 02:32:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 614 states have internal predecessors, (790), 98 states have call successors, (98), 51 states have call predecessors, (98), 68 states have return successors, (119), 111 states have call predecessors, (119), 93 states have call successors, (119) [2022-02-15 02:32:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1007 transitions. [2022-02-15 02:32:25,133 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1007 transitions. Word has length 59 [2022-02-15 02:32:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:25,133 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1007 transitions. [2022-02-15 02:32:25,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 8 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 02:32:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1007 transitions. [2022-02-15 02:32:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 02:32:25,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:25,135 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 02:32:25,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:32:25,135 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1218321174, now seen corresponding path program 1 times [2022-02-15 02:32:25,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:25,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512553850] [2022-02-15 02:32:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:25,137 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:32:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:25,294 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 02:32:25,295 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:25,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512553850] [2022-02-15 02:32:25,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [512553850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:25,295 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:25,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:32:25,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203870887] [2022-02-15 02:32:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:25,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:32:25,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:32:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:32:25,296 INFO L87 Difference]: Start difference. First operand 770 states and 1007 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:26,782 INFO L93 Difference]: Finished difference Result 913 states and 1205 transitions. [2022-02-15 02:32:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:32:26,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2022-02-15 02:32:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:26,785 INFO L225 Difference]: With dead ends: 913 [2022-02-15 02:32:26,785 INFO L226 Difference]: Without dead ends: 808 [2022-02-15 02:32:26,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:32:26,786 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 972 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:26,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1181 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:32:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-02-15 02:32:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 777. [2022-02-15 02:32:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 608 states have (on average 1.3108552631578947) internal successors, (797), 620 states have internal predecessors, (797), 99 states have call successors, (99), 51 states have call predecessors, (99), 69 states have return successors, (126), 112 states have call predecessors, (126), 94 states have call successors, (126) [2022-02-15 02:32:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1022 transitions. [2022-02-15 02:32:26,965 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1022 transitions. Word has length 60 [2022-02-15 02:32:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:26,966 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1022 transitions. [2022-02-15 02:32:26,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1022 transitions. [2022-02-15 02:32:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 02:32:26,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:26,967 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 02:32:26,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:32:26,967 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1493080788, now seen corresponding path program 1 times [2022-02-15 02:32:26,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:26,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629766389] [2022-02-15 02:32:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:26,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:26,969 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:32:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:27,178 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 02:32:27,178 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:27,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629766389] [2022-02-15 02:32:27,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1629766389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:27,178 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:27,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:32:27,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103783020] [2022-02-15 02:32:27,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:27,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:32:27,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:32:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:27,179 INFO L87 Difference]: Start difference. First operand 777 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 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 02:32:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:29,180 INFO L93 Difference]: Finished difference Result 799 states and 1045 transitions. [2022-02-15 02:32:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:32:29,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 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 60 [2022-02-15 02:32:29,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:29,182 INFO L225 Difference]: With dead ends: 799 [2022-02-15 02:32:29,182 INFO L226 Difference]: Without dead ends: 775 [2022-02-15 02:32:29,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:29,183 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 366 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:29,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1766 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:32:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-15 02:32:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-02-15 02:32:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 607 states have (on average 1.3097199341021417) internal successors, (795), 619 states have internal predecessors, (795), 98 states have call successors, (98), 51 states have call predecessors, (98), 69 states have return successors, (125), 111 states have call predecessors, (125), 93 states have call successors, (125) [2022-02-15 02:32:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1018 transitions. [2022-02-15 02:32:29,387 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1018 transitions. Word has length 60 [2022-02-15 02:32:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:29,388 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1018 transitions. [2022-02-15 02:32:29,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 9 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 02:32:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1018 transitions. [2022-02-15 02:32:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 02:32:29,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:29,389 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 02:32:29,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:32:29,389 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1062943735, now seen corresponding path program 1 times [2022-02-15 02:32:29,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:29,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973679909] [2022-02-15 02:32:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:29,391 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:29,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:29,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:29,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:32:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:29,632 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 02:32:29,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:29,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973679909] [2022-02-15 02:32:29,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973679909] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:29,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:29,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:32:29,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523648795] [2022-02-15 02:32:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:29,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:32:29,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:32:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:29,634 INFO L87 Difference]: Start difference. First operand 775 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 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 02:32:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:31,422 INFO L93 Difference]: Finished difference Result 837 states and 1087 transitions. [2022-02-15 02:32:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:32:31,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 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 60 [2022-02-15 02:32:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:31,424 INFO L225 Difference]: With dead ends: 837 [2022-02-15 02:32:31,424 INFO L226 Difference]: Without dead ends: 767 [2022-02-15 02:32:31,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:32:31,425 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 659 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 3967 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:31,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 1766 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3967 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:32:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-02-15 02:32:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-02-15 02:32:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 601 states have (on average 1.302828618968386) internal successors, (783), 613 states have internal predecessors, (783), 96 states have call successors, (96), 51 states have call predecessors, (96), 69 states have return successors, (123), 109 states have call predecessors, (123), 91 states have call successors, (123) [2022-02-15 02:32:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1002 transitions. [2022-02-15 02:32:31,606 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1002 transitions. Word has length 60 [2022-02-15 02:32:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:31,607 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1002 transitions. [2022-02-15 02:32:31,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 8 states have internal predecessors, (46), 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 02:32:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1002 transitions. [2022-02-15 02:32:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:32:31,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:31,608 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] [2022-02-15 02:32:31,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:32:31,608 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191438, now seen corresponding path program 1 times [2022-02-15 02:32:31,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:31,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097733388] [2022-02-15 02:32:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:31,610 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:32:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:31,788 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 02:32:31,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:31,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097733388] [2022-02-15 02:32:31,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097733388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:31,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:31,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:32:31,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133967521] [2022-02-15 02:32:31,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:31,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:32:31,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:31,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:32:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:32:31,790 INFO L87 Difference]: Start difference. First operand 767 states and 1002 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:33,255 INFO L93 Difference]: Finished difference Result 813 states and 1068 transitions. [2022-02-15 02:32:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:32:33,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2022-02-15 02:32:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:33,257 INFO L225 Difference]: With dead ends: 813 [2022-02-15 02:32:33,257 INFO L226 Difference]: Without dead ends: 779 [2022-02-15 02:32:33,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:33,258 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 636 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:33,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 1123 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:32:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-02-15 02:32:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 771. [2022-02-15 02:32:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 603 states have (on average 1.3018242122719734) internal successors, (785), 617 states have internal predecessors, (785), 96 states have call successors, (96), 51 states have call predecessors, (96), 71 states have return successors, (139), 109 states have call predecessors, (139), 91 states have call successors, (139) [2022-02-15 02:32:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1020 transitions. [2022-02-15 02:32:33,444 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1020 transitions. Word has length 61 [2022-02-15 02:32:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:33,444 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1020 transitions. [2022-02-15 02:32:33,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1020 transitions. [2022-02-15 02:32:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:32:33,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:33,445 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 02:32:33,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:32:33,446 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:33,446 INFO L85 PathProgramCache]: Analyzing trace with hash -136478580, now seen corresponding path program 1 times [2022-02-15 02:32:33,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:33,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264282566] [2022-02-15 02:32:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:33,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:33,448 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:33,745 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 02:32:33,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:33,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264282566] [2022-02-15 02:32:33,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264282566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:33,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:33,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:32:33,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358243607] [2022-02-15 02:32:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:33,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:32:33,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:32:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:33,746 INFO L87 Difference]: Start difference. First operand 771 states and 1020 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:32:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:36,333 INFO L93 Difference]: Finished difference Result 788 states and 1038 transitions. [2022-02-15 02:32:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:32:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 63 [2022-02-15 02:32:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:36,336 INFO L225 Difference]: With dead ends: 788 [2022-02-15 02:32:36,336 INFO L226 Difference]: Without dead ends: 766 [2022-02-15 02:32:36,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:32:36,337 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 883 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 5376 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 5686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 5376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:36,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 2405 Invalid, 5686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 5376 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:32:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-02-15 02:32:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-02-15 02:32:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 600 states have (on average 1.3016666666666667) internal successors, (781), 614 states have internal predecessors, (781), 95 states have call successors, (95), 51 states have call predecessors, (95), 70 states have return successors, (137), 107 states have call predecessors, (137), 90 states have call successors, (137) [2022-02-15 02:32:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1013 transitions. [2022-02-15 02:32:36,517 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1013 transitions. Word has length 63 [2022-02-15 02:32:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:36,517 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1013 transitions. [2022-02-15 02:32:36,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:32:36,517 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1013 transitions. [2022-02-15 02:32:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 02:32:36,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:36,518 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] [2022-02-15 02:32:36,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:32:36,519 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:36,519 INFO L85 PathProgramCache]: Analyzing trace with hash 930890902, now seen corresponding path program 1 times [2022-02-15 02:32:36,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:36,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721535179] [2022-02-15 02:32:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:36,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:36,521 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:36,760 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:36,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721535179] [2022-02-15 02:32:36,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [721535179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:36,760 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:36,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:32:36,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559297509] [2022-02-15 02:32:36,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:36,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:32:36,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:32:36,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:36,762 INFO L87 Difference]: Start difference. First operand 766 states and 1013 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:32:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:38,988 INFO L93 Difference]: Finished difference Result 783 states and 1031 transitions. [2022-02-15 02:32:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:32:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 62 [2022-02-15 02:32:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:38,990 INFO L225 Difference]: With dead ends: 783 [2022-02-15 02:32:38,990 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 02:32:38,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:32:38,991 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 591 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 5407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:38,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 2230 Invalid, 5407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:32:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 02:32:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2022-02-15 02:32:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 597 states have (on average 1.3015075376884422) internal successors, (777), 611 states have internal predecessors, (777), 94 states have call successors, (94), 51 states have call predecessors, (94), 69 states have return successors, (135), 105 states have call predecessors, (135), 89 states have call successors, (135) [2022-02-15 02:32:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1006 transitions. [2022-02-15 02:32:39,191 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1006 transitions. Word has length 62 [2022-02-15 02:32:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:39,191 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1006 transitions. [2022-02-15 02:32:39,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:32:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1006 transitions. [2022-02-15 02:32:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:32:39,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:39,193 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] [2022-02-15 02:32:39,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:32:39,193 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1197060442, now seen corresponding path program 1 times [2022-02-15 02:32:39,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:39,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840496967] [2022-02-15 02:32:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:39,195 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:39,461 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 02:32:39,461 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:39,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840496967] [2022-02-15 02:32:39,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1840496967] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:39,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:39,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:32:39,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908476829] [2022-02-15 02:32:39,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:39,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:32:39,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:32:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:32:39,464 INFO L87 Difference]: Start difference. First operand 761 states and 1006 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:32:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:41,265 INFO L93 Difference]: Finished difference Result 785 states and 1031 transitions. [2022-02-15 02:32:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:32:41,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 67 [2022-02-15 02:32:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:41,267 INFO L225 Difference]: With dead ends: 785 [2022-02-15 02:32:41,267 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 02:32:41,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:32:41,268 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 1780 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:41,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 2244 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:32:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 02:32:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 759. [2022-02-15 02:32:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 596 states have (on average 1.3003355704697988) internal successors, (775), 610 states have internal predecessors, (775), 93 states have call successors, (93), 51 states have call predecessors, (93), 69 states have return successors, (134), 104 states have call predecessors, (134), 88 states have call successors, (134) [2022-02-15 02:32:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1002 transitions. [2022-02-15 02:32:41,443 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1002 transitions. Word has length 67 [2022-02-15 02:32:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:41,443 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1002 transitions. [2022-02-15 02:32:41,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:32:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1002 transitions. [2022-02-15 02:32:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:32:41,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:41,445 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 02:32:41,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:32:41,445 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1449409574, now seen corresponding path program 1 times [2022-02-15 02:32:41,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:41,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246382960] [2022-02-15 02:32:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:41,447 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:32:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:41,681 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 02:32:41,682 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:41,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246382960] [2022-02-15 02:32:41,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [246382960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:41,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:41,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:32:41,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729829387] [2022-02-15 02:32:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:41,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:32:41,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:32:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:32:41,684 INFO L87 Difference]: Start difference. First operand 759 states and 1002 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:43,391 INFO L93 Difference]: Finished difference Result 781 states and 1025 transitions. [2022-02-15 02:32:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:32:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-02-15 02:32:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:43,393 INFO L225 Difference]: With dead ends: 781 [2022-02-15 02:32:43,393 INFO L226 Difference]: Without dead ends: 757 [2022-02-15 02:32:43,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:32:43,394 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 1456 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 5075 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 5584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 5075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:43,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2141 Invalid, 5584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 5075 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:32:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-15 02:32:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2022-02-15 02:32:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 595 states have (on average 1.2991596638655463) internal successors, (773), 609 states have internal predecessors, (773), 92 states have call successors, (92), 51 states have call predecessors, (92), 69 states have return successors, (133), 103 states have call predecessors, (133), 87 states have call successors, (133) [2022-02-15 02:32:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 998 transitions. [2022-02-15 02:32:43,571 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 998 transitions. Word has length 63 [2022-02-15 02:32:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:43,571 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 998 transitions. [2022-02-15 02:32:43,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 998 transitions. [2022-02-15 02:32:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:32:43,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:43,573 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 02:32:43,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:32:43,573 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:43,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1540652363, now seen corresponding path program 1 times [2022-02-15 02:32:43,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:43,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611475935] [2022-02-15 02:32:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:43,575 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:32:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:43,707 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 02:32:43,707 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:43,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611475935] [2022-02-15 02:32:43,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611475935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:43,707 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:43,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:32:43,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059703030] [2022-02-15 02:32:43,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:43,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:32:43,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:32:43,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:32:43,708 INFO L87 Difference]: Start difference. First operand 757 states and 998 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:44,580 INFO L93 Difference]: Finished difference Result 1021 states and 1347 transitions. [2022-02-15 02:32:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:32:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-02-15 02:32:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:44,584 INFO L225 Difference]: With dead ends: 1021 [2022-02-15 02:32:44,584 INFO L226 Difference]: Without dead ends: 702 [2022-02-15 02:32:44,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:32:44,585 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 1149 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:44,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 863 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:32:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-15 02:32:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 685. [2022-02-15 02:32:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 540 states have (on average 1.2925925925925925) internal successors, (698), 552 states have internal predecessors, (698), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-02-15 02:32:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 882 transitions. [2022-02-15 02:32:44,760 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 882 transitions. Word has length 63 [2022-02-15 02:32:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:44,760 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 882 transitions. [2022-02-15 02:32:44,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 882 transitions. [2022-02-15 02:32:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:32:44,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:44,762 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] [2022-02-15 02:32:44,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:32:44,762 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash 837617487, now seen corresponding path program 1 times [2022-02-15 02:32:44,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:44,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143435193] [2022-02-15 02:32:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:44,764 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 02:32:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:44,910 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 02:32:44,910 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:44,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143435193] [2022-02-15 02:32:44,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143435193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:44,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:44,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:32:44,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544454874] [2022-02-15 02:32:44,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:44,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:32:44,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:32:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:32:44,911 INFO L87 Difference]: Start difference. First operand 685 states and 882 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:32:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:46,055 INFO L93 Difference]: Finished difference Result 805 states and 1038 transitions. [2022-02-15 02:32:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:32:46,055 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 66 [2022-02-15 02:32:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:46,057 INFO L225 Difference]: With dead ends: 805 [2022-02-15 02:32:46,057 INFO L226 Difference]: Without dead ends: 685 [2022-02-15 02:32:46,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:32:46,058 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 338 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:46,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 849 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:32:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-02-15 02:32:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 685. [2022-02-15 02:32:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 540 states have (on average 1.288888888888889) internal successors, (696), 552 states have internal predecessors, (696), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-02-15 02:32:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 880 transitions. [2022-02-15 02:32:46,218 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 880 transitions. Word has length 66 [2022-02-15 02:32:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:46,219 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 880 transitions. [2022-02-15 02:32:46,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:32:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 880 transitions. [2022-02-15 02:32:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:32:46,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:46,220 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] [2022-02-15 02:32:46,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:32:46,220 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash 459187299, now seen corresponding path program 1 times [2022-02-15 02:32:46,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:46,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944997128] [2022-02-15 02:32:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:46,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:46,222 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:32:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:46,497 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 02:32:46,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:46,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944997128] [2022-02-15 02:32:46,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [944997128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:46,497 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:46,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:32:46,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421428306] [2022-02-15 02:32:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:46,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:32:46,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:32:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:32:46,498 INFO L87 Difference]: Start difference. First operand 685 states and 880 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:32:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:48,465 INFO L93 Difference]: Finished difference Result 707 states and 903 transitions. [2022-02-15 02:32:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:32:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2022-02-15 02:32:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:48,467 INFO L225 Difference]: With dead ends: 707 [2022-02-15 02:32:48,468 INFO L226 Difference]: Without dead ends: 683 [2022-02-15 02:32:48,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:32:48,468 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 1194 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 5233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:48,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 2046 Invalid, 5233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:32:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-02-15 02:32:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2022-02-15 02:32:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 539 states have (on average 1.287569573283859) internal successors, (694), 551 states have internal predecessors, (694), 81 states have call successors, (81), 47 states have call predecessors, (81), 62 states have return successors, (101), 91 states have call predecessors, (101), 76 states have call successors, (101) [2022-02-15 02:32:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 876 transitions. [2022-02-15 02:32:48,625 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 876 transitions. Word has length 66 [2022-02-15 02:32:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:48,626 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 876 transitions. [2022-02-15 02:32:48,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 10 states have internal predecessors, (48), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:32:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 876 transitions. [2022-02-15 02:32:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 02:32:48,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:48,627 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] [2022-02-15 02:32:48,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:32:48,627 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1196782002, now seen corresponding path program 1 times [2022-02-15 02:32:48,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:48,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516156795] [2022-02-15 02:32:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:48,629 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:32:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:48,800 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 02:32:48,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:48,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516156795] [2022-02-15 02:32:48,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516156795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:48,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:48,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:32:48,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953742008] [2022-02-15 02:32:48,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:32:48,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:32:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:32:48,803 INFO L87 Difference]: Start difference. First operand 683 states and 876 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:49,865 INFO L93 Difference]: Finished difference Result 747 states and 952 transitions. [2022-02-15 02:32:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:32:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-02-15 02:32:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:49,868 INFO L225 Difference]: With dead ends: 747 [2022-02-15 02:32:49,868 INFO L226 Difference]: Without dead ends: 714 [2022-02-15 02:32:49,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:32:49,870 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 772 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:49,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 863 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:32:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-15 02:32:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 689. [2022-02-15 02:32:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 544 states have (on average 1.286764705882353) internal successors, (700), 556 states have internal predecessors, (700), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-02-15 02:32:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 884 transitions. [2022-02-15 02:32:50,036 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 884 transitions. Word has length 65 [2022-02-15 02:32:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:50,037 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 884 transitions. [2022-02-15 02:32:50,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-15 02:32:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 884 transitions. [2022-02-15 02:32:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:32:50,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:50,038 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] [2022-02-15 02:32:50,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:32:50,038 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1406064246, now seen corresponding path program 1 times [2022-02-15 02:32:50,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:50,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338557918] [2022-02-15 02:32:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:50,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:50,041 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:32:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:50,202 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 02:32:50,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:50,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338557918] [2022-02-15 02:32:50,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [338557918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:50,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:50,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:32:50,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223752488] [2022-02-15 02:32:50,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:50,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:32:50,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:50,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:32:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:32:50,204 INFO L87 Difference]: Start difference. First operand 689 states and 884 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:51,181 INFO L93 Difference]: Finished difference Result 745 states and 945 transitions. [2022-02-15 02:32:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:32:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-02-15 02:32:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:51,184 INFO L225 Difference]: With dead ends: 745 [2022-02-15 02:32:51,184 INFO L226 Difference]: Without dead ends: 691 [2022-02-15 02:32:51,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:51,185 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 615 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:51,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 997 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:32:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-15 02:32:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-02-15 02:32:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 544 states have (on average 1.2830882352941178) internal successors, (698), 556 states have internal predecessors, (698), 82 states have call successors, (82), 47 states have call predecessors, (82), 62 states have return successors, (102), 92 states have call predecessors, (102), 77 states have call successors, (102) [2022-02-15 02:32:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 882 transitions. [2022-02-15 02:32:51,350 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 882 transitions. Word has length 66 [2022-02-15 02:32:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:51,350 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 882 transitions. [2022-02-15 02:32:51,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 882 transitions. [2022-02-15 02:32:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:32:51,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:51,351 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] [2022-02-15 02:32:51,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:32:51,352 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash -704464372, now seen corresponding path program 1 times [2022-02-15 02:32:51,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:51,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237309375] [2022-02-15 02:32:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:51,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:51,353 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:32:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:51,538 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 02:32:51,538 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:51,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237309375] [2022-02-15 02:32:51,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1237309375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:51,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:51,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:32:51,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001552651] [2022-02-15 02:32:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:51,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:32:51,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:32:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:51,539 INFO L87 Difference]: Start difference. First operand 689 states and 882 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 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 02:32:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:53,500 INFO L93 Difference]: Finished difference Result 716 states and 912 transitions. [2022-02-15 02:32:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:32:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 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 66 [2022-02-15 02:32:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:53,502 INFO L225 Difference]: With dead ends: 716 [2022-02-15 02:32:53,502 INFO L226 Difference]: Without dead ends: 658 [2022-02-15 02:32:53,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:32:53,503 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 361 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:53,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1642 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:32:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-02-15 02:32:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2022-02-15 02:32:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 514 states have (on average 1.2684824902723735) internal successors, (652), 526 states have internal predecessors, (652), 75 states have call successors, (75), 47 states have call predecessors, (75), 62 states have return successors, (94), 85 states have call predecessors, (94), 70 states have call successors, (94) [2022-02-15 02:32:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 821 transitions. [2022-02-15 02:32:53,651 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 821 transitions. Word has length 66 [2022-02-15 02:32:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:53,651 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 821 transitions. [2022-02-15 02:32:53,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (9), 9 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 02:32:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 821 transitions. [2022-02-15 02:32:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:32:53,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:53,652 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] [2022-02-15 02:32:53,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:32:53,652 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1352254083, now seen corresponding path program 1 times [2022-02-15 02:32:53,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:53,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500418323] [2022-02-15 02:32:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:53,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:53,655 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-15 02:32:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:53,836 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 02:32:53,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:53,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500418323] [2022-02-15 02:32:53,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [500418323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:53,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:53,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:32:53,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155923720] [2022-02-15 02:32:53,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:53,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:32:53,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:32:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:32:53,837 INFO L87 Difference]: Start difference. First operand 652 states and 821 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:54,780 INFO L93 Difference]: Finished difference Result 686 states and 856 transitions. [2022-02-15 02:32:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:32:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-02-15 02:32:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:54,782 INFO L225 Difference]: With dead ends: 686 [2022-02-15 02:32:54,782 INFO L226 Difference]: Without dead ends: 647 [2022-02-15 02:32:54,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:54,783 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 510 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:54,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 1027 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:32:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-15 02:32:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-02-15 02:32:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 510 states have (on average 1.268627450980392) internal successors, (647), 522 states have internal predecessors, (647), 74 states have call successors, (74), 47 states have call predecessors, (74), 62 states have return successors, (93), 84 states have call predecessors, (93), 69 states have call successors, (93) [2022-02-15 02:32:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 814 transitions. [2022-02-15 02:32:54,931 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 814 transitions. Word has length 67 [2022-02-15 02:32:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:54,931 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 814 transitions. [2022-02-15 02:32:54,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:32:54,931 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 814 transitions. [2022-02-15 02:32:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:32:54,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:54,933 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] [2022-02-15 02:32:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:32:54,933 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1349512903, now seen corresponding path program 1 times [2022-02-15 02:32:54,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:54,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366846498] [2022-02-15 02:32:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:54,936 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:54,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:55,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:55,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:55,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:55,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:55,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:55,097 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 02:32:55,097 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:55,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366846498] [2022-02-15 02:32:55,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [366846498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:55,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:55,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:32:55,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968772292] [2022-02-15 02:32:55,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:55,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:32:55,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:32:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:32:55,099 INFO L87 Difference]: Start difference. First operand 647 states and 814 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:32:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:56,320 INFO L93 Difference]: Finished difference Result 771 states and 965 transitions. [2022-02-15 02:32:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:32:56,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2022-02-15 02:32:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:56,322 INFO L225 Difference]: With dead ends: 771 [2022-02-15 02:32:56,322 INFO L226 Difference]: Without dead ends: 763 [2022-02-15 02:32:56,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:32:56,323 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 907 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:56,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 925 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:32:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-15 02:32:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 689. [2022-02-15 02:32:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 542 states have (on average 1.2619926199261993) internal successors, (684), 556 states have internal predecessors, (684), 76 states have call successors, (76), 49 states have call predecessors, (76), 70 states have return successors, (101), 92 states have call predecessors, (101), 71 states have call successors, (101) [2022-02-15 02:32:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 861 transitions. [2022-02-15 02:32:56,475 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 861 transitions. Word has length 67 [2022-02-15 02:32:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:56,475 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 861 transitions. [2022-02-15 02:32:56,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:32:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 861 transitions. [2022-02-15 02:32:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 02:32:56,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:56,476 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 02:32:56,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 02:32:56,476 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:56,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1558643705, now seen corresponding path program 1 times [2022-02-15 02:32:56,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:56,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299308296] [2022-02-15 02:32:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:56,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:56,478 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:32:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:56,644 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 02:32:56,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:56,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299308296] [2022-02-15 02:32:56,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299308296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:56,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:56,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:32:56,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928494100] [2022-02-15 02:32:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:56,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:32:56,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:56,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:32:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:32:56,645 INFO L87 Difference]: Start difference. First operand 689 states and 861 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 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 02:32:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:58,022 INFO L93 Difference]: Finished difference Result 767 states and 959 transitions. [2022-02-15 02:32:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 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 68 [2022-02-15 02:32:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:58,024 INFO L225 Difference]: With dead ends: 767 [2022-02-15 02:32:58,024 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 02:32:58,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:32:58,025 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1189 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:58,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 821 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:32:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 02:32:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 689. [2022-02-15 02:32:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 542 states have (on average 1.2601476014760147) internal successors, (683), 556 states have internal predecessors, (683), 76 states have call successors, (76), 49 states have call predecessors, (76), 70 states have return successors, (101), 92 states have call predecessors, (101), 71 states have call successors, (101) [2022-02-15 02:32:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 860 transitions. [2022-02-15 02:32:58,184 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 860 transitions. Word has length 68 [2022-02-15 02:32:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:58,184 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 860 transitions. [2022-02-15 02:32:58,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (9), 9 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 02:32:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 860 transitions. [2022-02-15 02:32:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:32:58,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:58,185 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] [2022-02-15 02:32:58,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 02:32:58,185 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash -394111726, now seen corresponding path program 1 times [2022-02-15 02:32:58,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:58,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442567955] [2022-02-15 02:32:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:58,187 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:32:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:32:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:58,467 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 02:32:58,467 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:58,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442567955] [2022-02-15 02:32:58,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [442567955] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:58,467 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:58,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:32:58,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981454933] [2022-02-15 02:32:58,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:58,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:32:58,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:58,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:32:58,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:32:58,468 INFO L87 Difference]: Start difference. First operand 689 states and 860 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:33:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:00,668 INFO L93 Difference]: Finished difference Result 722 states and 899 transitions. [2022-02-15 02:33:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:33:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2022-02-15 02:33:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:00,670 INFO L225 Difference]: With dead ends: 722 [2022-02-15 02:33:00,670 INFO L226 Difference]: Without dead ends: 698 [2022-02-15 02:33:00,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:33:00,671 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 311 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 4559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:00,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 2212 Invalid, 4559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 02:33:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-15 02:33:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 687. [2022-02-15 02:33:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 541 states have (on average 1.2587800369685767) internal successors, (681), 555 states have internal predecessors, (681), 75 states have call successors, (75), 49 states have call predecessors, (75), 70 states have return successors, (100), 91 states have call predecessors, (100), 70 states have call successors, (100) [2022-02-15 02:33:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 856 transitions. [2022-02-15 02:33:00,829 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 856 transitions. Word has length 74 [2022-02-15 02:33:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:00,829 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 856 transitions. [2022-02-15 02:33:00,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 10 states have internal predecessors, (54), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:33:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 856 transitions. [2022-02-15 02:33:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:33:00,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:00,831 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] [2022-02-15 02:33:00,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 02:33:00,831 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash 160645946, now seen corresponding path program 1 times [2022-02-15 02:33:00,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:00,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308061518] [2022-02-15 02:33:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:00,832 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:00,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:00,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:00,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:00,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:01,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:33:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:01,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:33:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:01,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:01,192 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 02:33:01,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:01,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308061518] [2022-02-15 02:33:01,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [308061518] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:01,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:01,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:33:01,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300617369] [2022-02-15 02:33:01,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:01,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:33:01,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:33:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:33:01,194 INFO L87 Difference]: Start difference. First operand 687 states and 856 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:33:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:03,328 INFO L93 Difference]: Finished difference Result 711 states and 882 transitions. [2022-02-15 02:33:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:33:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2022-02-15 02:33:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:03,337 INFO L225 Difference]: With dead ends: 711 [2022-02-15 02:33:03,337 INFO L226 Difference]: Without dead ends: 684 [2022-02-15 02:33:03,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:33:03,339 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 789 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 4575 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 4844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 4575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:03,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2269 Invalid, 4844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 4575 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:33:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-15 02:33:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-02-15 02:33:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 539 states have (on average 1.2578849721706864) internal successors, (678), 553 states have internal predecessors, (678), 74 states have call successors, (74), 49 states have call predecessors, (74), 70 states have return successors, (99), 90 states have call predecessors, (99), 69 states have call successors, (99) [2022-02-15 02:33:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 851 transitions. [2022-02-15 02:33:03,522 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 851 transitions. Word has length 70 [2022-02-15 02:33:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:03,522 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 851 transitions. [2022-02-15 02:33:03,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (10), 10 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:33:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 851 transitions. [2022-02-15 02:33:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:33:03,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:03,524 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] [2022-02-15 02:33:03,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 02:33:03,524 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash -20472114, now seen corresponding path program 1 times [2022-02-15 02:33:03,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:03,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047944002] [2022-02-15 02:33:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:03,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:03,526 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:33:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:33:03,804 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:03,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047944002] [2022-02-15 02:33:03,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047944002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:03,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:03,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:33:03,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902654741] [2022-02-15 02:33:03,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:03,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:33:03,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:33:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:33:03,806 INFO L87 Difference]: Start difference. First operand 684 states and 851 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:33:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:05,316 INFO L93 Difference]: Finished difference Result 704 states and 872 transitions. [2022-02-15 02:33:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:33:05,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 72 [2022-02-15 02:33:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:05,319 INFO L225 Difference]: With dead ends: 704 [2022-02-15 02:33:05,319 INFO L226 Difference]: Without dead ends: 682 [2022-02-15 02:33:05,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:33:05,319 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 465 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 4228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:05,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 2031 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:33:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-15 02:33:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-02-15 02:33:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 538 states have (on average 1.2565055762081785) internal successors, (676), 552 states have internal predecessors, (676), 73 states have call successors, (73), 49 states have call predecessors, (73), 70 states have return successors, (98), 89 states have call predecessors, (98), 68 states have call successors, (98) [2022-02-15 02:33:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 847 transitions. [2022-02-15 02:33:05,502 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 847 transitions. Word has length 72 [2022-02-15 02:33:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:05,503 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 847 transitions. [2022-02-15 02:33:05,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:33:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 847 transitions. [2022-02-15 02:33:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:33:05,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:05,504 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] [2022-02-15 02:33:05,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 02:33:05,504 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash 968945146, now seen corresponding path program 1 times [2022-02-15 02:33:05,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:05,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669257745] [2022-02-15 02:33:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:05,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:05,506 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:33:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:05,791 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 02:33:05,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:05,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669257745] [2022-02-15 02:33:05,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [669257745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:05,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:05,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:33:05,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017688836] [2022-02-15 02:33:05,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:05,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:33:05,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:33:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:33:05,792 INFO L87 Difference]: Start difference. First operand 682 states and 847 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:33:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:07,275 INFO L93 Difference]: Finished difference Result 699 states and 865 transitions. [2022-02-15 02:33:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:33:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-02-15 02:33:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:07,277 INFO L225 Difference]: With dead ends: 699 [2022-02-15 02:33:07,277 INFO L226 Difference]: Without dead ends: 670 [2022-02-15 02:33:07,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:33:07,278 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 689 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 4417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:07,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 2003 Invalid, 4417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:33:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-15 02:33:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2022-02-15 02:33:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 529 states have (on average 1.2570888468809074) internal successors, (665), 543 states have internal predecessors, (665), 71 states have call successors, (71), 49 states have call predecessors, (71), 69 states have return successors, (95), 86 states have call predecessors, (95), 66 states have call successors, (95) [2022-02-15 02:33:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 831 transitions. [2022-02-15 02:33:07,431 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 831 transitions. Word has length 69 [2022-02-15 02:33:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:07,431 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 831 transitions. [2022-02-15 02:33:07,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:33:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 831 transitions. [2022-02-15 02:33:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:33:07,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:07,433 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] [2022-02-15 02:33:07,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 02:33:07,433 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash 215886750, now seen corresponding path program 1 times [2022-02-15 02:33:07,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:07,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918468127] [2022-02-15 02:33:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:07,435 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:33:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:33:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:07,562 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 02:33:07,562 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:07,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918468127] [2022-02-15 02:33:07,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [918468127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:07,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:07,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:33:07,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718788405] [2022-02-15 02:33:07,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:07,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:33:07,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:07,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:33:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:33:07,564 INFO L87 Difference]: Start difference. First operand 670 states and 831 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:33:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:08,733 INFO L93 Difference]: Finished difference Result 704 states and 866 transitions. [2022-02-15 02:33:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-02-15 02:33:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:08,735 INFO L225 Difference]: With dead ends: 704 [2022-02-15 02:33:08,735 INFO L226 Difference]: Without dead ends: 665 [2022-02-15 02:33:08,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:33:08,736 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 703 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:08,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 981 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:33:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-15 02:33:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-02-15 02:33:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 525 states have (on average 1.2571428571428571) internal successors, (660), 539 states have internal predecessors, (660), 70 states have call successors, (70), 49 states have call predecessors, (70), 69 states have return successors, (94), 85 states have call predecessors, (94), 65 states have call successors, (94) [2022-02-15 02:33:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 824 transitions. [2022-02-15 02:33:08,921 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 824 transitions. Word has length 69 [2022-02-15 02:33:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:08,921 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 824 transitions. [2022-02-15 02:33:08,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:33:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 824 transitions. [2022-02-15 02:33:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:33:08,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:08,922 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] [2022-02-15 02:33:08,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 02:33:08,922 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash 430312169, now seen corresponding path program 1 times [2022-02-15 02:33:08,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:08,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118975661] [2022-02-15 02:33:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:08,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:08,924 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:08,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:09,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:09,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:09,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:33:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:09,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:33:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:33:09,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:09,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118975661] [2022-02-15 02:33:09,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118975661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:09,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:09,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:33:09,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209128198] [2022-02-15 02:33:09,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:09,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:33:09,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:33:09,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:33:09,178 INFO L87 Difference]: Start difference. First operand 665 states and 824 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:33:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:10,709 INFO L93 Difference]: Finished difference Result 692 states and 854 transitions. [2022-02-15 02:33:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:33:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-02-15 02:33:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:10,711 INFO L225 Difference]: With dead ends: 692 [2022-02-15 02:33:10,711 INFO L226 Difference]: Without dead ends: 662 [2022-02-15 02:33:10,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:33:10,712 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 260 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:10,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1933 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:33:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-15 02:33:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-02-15 02:33:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 523 states have (on average 1.2562141491395793) internal successors, (657), 537 states have internal predecessors, (657), 69 states have call successors, (69), 49 states have call predecessors, (69), 69 states have return successors, (93), 84 states have call predecessors, (93), 64 states have call successors, (93) [2022-02-15 02:33:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 819 transitions. [2022-02-15 02:33:10,869 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 819 transitions. Word has length 69 [2022-02-15 02:33:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:10,869 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 819 transitions. [2022-02-15 02:33:10,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:33:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 819 transitions. [2022-02-15 02:33:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:33:10,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:10,870 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] [2022-02-15 02:33:10,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 02:33:10,870 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash 432994108, now seen corresponding path program 1 times [2022-02-15 02:33:10,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:10,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32409503] [2022-02-15 02:33:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:10,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:10,872 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:10,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:10,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:10,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:10,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:11,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:11,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:11,070 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 02:33:11,070 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:11,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32409503] [2022-02-15 02:33:11,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [32409503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:11,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:11,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:33:11,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256512827] [2022-02-15 02:33:11,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:11,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:33:11,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:33:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:33:11,071 INFO L87 Difference]: Start difference. First operand 662 states and 819 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:33:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:12,364 INFO L93 Difference]: Finished difference Result 672 states and 828 transitions. [2022-02-15 02:33:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:33:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-02-15 02:33:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:12,366 INFO L225 Difference]: With dead ends: 672 [2022-02-15 02:33:12,366 INFO L226 Difference]: Without dead ends: 666 [2022-02-15 02:33:12,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:33:12,366 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 748 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 3700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:12,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1544 Invalid, 3700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:33:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-15 02:33:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 660. [2022-02-15 02:33:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 521 states have (on average 1.2533589251439539) internal successors, (653), 535 states have internal predecessors, (653), 69 states have call successors, (69), 49 states have call predecessors, (69), 69 states have return successors, (93), 84 states have call predecessors, (93), 64 states have call successors, (93) [2022-02-15 02:33:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 815 transitions. [2022-02-15 02:33:12,518 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 815 transitions. Word has length 69 [2022-02-15 02:33:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:12,519 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 815 transitions. [2022-02-15 02:33:12,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:33:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 815 transitions. [2022-02-15 02:33:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:33:12,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:12,520 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] [2022-02-15 02:33:12,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 02:33:12,520 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash 432717278, now seen corresponding path program 1 times [2022-02-15 02:33:12,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:12,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418314437] [2022-02-15 02:33:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:12,522 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:12,706 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 02:33:12,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:12,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418314437] [2022-02-15 02:33:12,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [418314437] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:12,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:12,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:33:12,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653393295] [2022-02-15 02:33:12,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:12,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:33:12,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:12,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:33:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:33:12,708 INFO L87 Difference]: Start difference. First operand 660 states and 815 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 9 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 02:33:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:13,913 INFO L93 Difference]: Finished difference Result 736 states and 910 transitions. [2022-02-15 02:33:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:33:13,913 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), 3 states have call successors, (9), 9 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 69 [2022-02-15 02:33:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:13,915 INFO L225 Difference]: With dead ends: 736 [2022-02-15 02:33:13,915 INFO L226 Difference]: Without dead ends: 674 [2022-02-15 02:33:13,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:33:13,915 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 901 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:13,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 840 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:33:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-02-15 02:33:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 604. [2022-02-15 02:33:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 475 states have (on average 1.2463157894736843) internal successors, (592), 487 states have internal predecessors, (592), 67 states have call successors, (67), 47 states have call predecessors, (67), 61 states have return successors, (85), 76 states have call predecessors, (85), 62 states have call successors, (85) [2022-02-15 02:33:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 744 transitions. [2022-02-15 02:33:14,057 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 744 transitions. Word has length 69 [2022-02-15 02:33:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:14,057 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 744 transitions. [2022-02-15 02:33:14,057 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), 3 states have call successors, (9), 9 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 02:33:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 744 transitions. [2022-02-15 02:33:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 02:33:14,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:14,058 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 02:33:14,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 02:33:14,059 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1139480101, now seen corresponding path program 1 times [2022-02-15 02:33:14,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:14,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505733316] [2022-02-15 02:33:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:14,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:14,060 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:33:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:14,317 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 02:33:14,317 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:14,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505733316] [2022-02-15 02:33:14,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [505733316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:14,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:14,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:33:14,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999922540] [2022-02-15 02:33:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:14,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:33:14,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:33:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:33:14,318 INFO L87 Difference]: Start difference. First operand 604 states and 744 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:33:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:15,863 INFO L93 Difference]: Finished difference Result 637 states and 783 transitions. [2022-02-15 02:33:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:33:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2022-02-15 02:33:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:15,879 INFO L225 Difference]: With dead ends: 637 [2022-02-15 02:33:15,879 INFO L226 Difference]: Without dead ends: 610 [2022-02-15 02:33:15,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:33:15,880 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 1108 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 4000 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 4000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:15,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2200 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 4000 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:33:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-15 02:33:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2022-02-15 02:33:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 477 states have (on average 1.2389937106918238) internal successors, (591), 489 states have internal predecessors, (591), 67 states have call successors, (67), 47 states have call predecessors, (67), 61 states have return successors, (85), 76 states have call predecessors, (85), 62 states have call successors, (85) [2022-02-15 02:33:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 743 transitions. [2022-02-15 02:33:16,043 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 743 transitions. Word has length 71 [2022-02-15 02:33:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:16,043 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 743 transitions. [2022-02-15 02:33:16,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 02:33:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 743 transitions. [2022-02-15 02:33:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 02:33:16,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:16,045 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 02:33:16,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 02:33:16,045 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:16,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503197, now seen corresponding path program 1 times [2022-02-15 02:33:16,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:16,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195323457] [2022-02-15 02:33:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:16,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:16,046 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:33:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:16,191 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 02:33:16,191 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:16,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195323457] [2022-02-15 02:33:16,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [195323457] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:16,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:16,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:33:16,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124774740] [2022-02-15 02:33:16,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:16,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:33:16,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:33:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:33:16,192 INFO L87 Difference]: Start difference. First operand 606 states and 743 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:17,295 INFO L93 Difference]: Finished difference Result 644 states and 782 transitions. [2022-02-15 02:33:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:17,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-02-15 02:33:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:17,297 INFO L225 Difference]: With dead ends: 644 [2022-02-15 02:33:17,297 INFO L226 Difference]: Without dead ends: 599 [2022-02-15 02:33:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:33:17,298 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 243 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1087 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:33:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-15 02:33:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-02-15 02:33:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.2399150743099787) internal successors, (584), 483 states have internal predecessors, (584), 66 states have call successors, (66), 47 states have call predecessors, (66), 61 states have return successors, (83), 75 states have call predecessors, (83), 61 states have call successors, (83) [2022-02-15 02:33:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 733 transitions. [2022-02-15 02:33:17,439 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 733 transitions. Word has length 71 [2022-02-15 02:33:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:17,439 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 733 transitions. [2022-02-15 02:33:17,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 733 transitions. [2022-02-15 02:33:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 02:33:17,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:17,440 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 02:33:17,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 02:33:17,441 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:17,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1182907842, now seen corresponding path program 1 times [2022-02-15 02:33:17,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:17,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936525667] [2022-02-15 02:33:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:17,442 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:33:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:17,588 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 02:33:17,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:17,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936525667] [2022-02-15 02:33:17,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [936525667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:17,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:17,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:33:17,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385505393] [2022-02-15 02:33:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:17,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:33:17,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:17,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:33:17,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:33:17,590 INFO L87 Difference]: Start difference. First operand 599 states and 733 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:18,512 INFO L93 Difference]: Finished difference Result 637 states and 772 transitions. [2022-02-15 02:33:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-02-15 02:33:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:18,513 INFO L225 Difference]: With dead ends: 637 [2022-02-15 02:33:18,513 INFO L226 Difference]: Without dead ends: 593 [2022-02-15 02:33:18,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:33:18,514 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 623 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:18,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 949 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:33:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-15 02:33:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-02-15 02:33:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 466 states have (on average 1.240343347639485) internal successors, (578), 478 states have internal predecessors, (578), 65 states have call successors, (65), 47 states have call predecessors, (65), 61 states have return successors, (82), 74 states have call predecessors, (82), 60 states have call successors, (82) [2022-02-15 02:33:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 725 transitions. [2022-02-15 02:33:18,652 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 725 transitions. Word has length 71 [2022-02-15 02:33:18,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:18,653 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 725 transitions. [2022-02-15 02:33:18,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 725 transitions. [2022-02-15 02:33:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:33:18,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:18,654 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 02:33:18,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 02:33:18,654 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:18,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1729682275, now seen corresponding path program 1 times [2022-02-15 02:33:18,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:18,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264850606] [2022-02-15 02:33:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:18,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:18,656 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:33:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:33:18,840 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:18,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264850606] [2022-02-15 02:33:18,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264850606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:18,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:18,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:33:18,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571021149] [2022-02-15 02:33:18,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:18,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:33:18,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:18,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:33:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:33:18,841 INFO L87 Difference]: Start difference. First operand 593 states and 725 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:19,565 INFO L93 Difference]: Finished difference Result 631 states and 764 transitions. [2022-02-15 02:33:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:19,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2022-02-15 02:33:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:19,566 INFO L225 Difference]: With dead ends: 631 [2022-02-15 02:33:19,566 INFO L226 Difference]: Without dead ends: 581 [2022-02-15 02:33:19,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:33:19,567 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 632 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:19,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 886 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:33:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-15 02:33:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2022-02-15 02:33:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 455 states have (on average 1.2351648351648352) internal successors, (562), 467 states have internal predecessors, (562), 64 states have call successors, (64), 47 states have call predecessors, (64), 61 states have return successors, (81), 73 states have call predecessors, (81), 59 states have call successors, (81) [2022-02-15 02:33:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 707 transitions. [2022-02-15 02:33:19,721 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 707 transitions. Word has length 73 [2022-02-15 02:33:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:19,722 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 707 transitions. [2022-02-15 02:33:19,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 10 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 707 transitions. [2022-02-15 02:33:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:33:19,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:19,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:33:19,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 02:33:19,723 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2105282597, now seen corresponding path program 1 times [2022-02-15 02:33:19,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:19,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117452677] [2022-02-15 02:33:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:19,725 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:33:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:19,968 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 02:33:19,968 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:19,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117452677] [2022-02-15 02:33:19,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117452677] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:19,968 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:19,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:33:19,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748287832] [2022-02-15 02:33:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:19,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:33:19,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:33:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:33:19,969 INFO L87 Difference]: Start difference. First operand 581 states and 707 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 02:33:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:23,163 INFO L93 Difference]: Finished difference Result 1245 states and 1510 transitions. [2022-02-15 02:33:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 02:33:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-02-15 02:33:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:23,167 INFO L225 Difference]: With dead ends: 1245 [2022-02-15 02:33:23,167 INFO L226 Difference]: Without dead ends: 1100 [2022-02-15 02:33:23,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=614, Invalid=2356, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:33:23,168 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 2001 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 4443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 3823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:23,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 1198 Invalid, 4443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:33:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-02-15 02:33:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 892. [2022-02-15 02:33:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 703 states have (on average 1.2574679943100995) internal successors, (884), 722 states have internal predecessors, (884), 95 states have call successors, (95), 74 states have call predecessors, (95), 93 states have return successors, (124), 102 states have call predecessors, (124), 90 states have call successors, (124) [2022-02-15 02:33:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1103 transitions. [2022-02-15 02:33:23,384 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1103 transitions. Word has length 73 [2022-02-15 02:33:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:23,384 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1103 transitions. [2022-02-15 02:33:23,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (10), 10 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 02:33:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1103 transitions. [2022-02-15 02:33:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:33:23,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:23,386 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 02:33:23,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 02:33:23,386 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1426010343, now seen corresponding path program 1 times [2022-02-15 02:33:23,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:23,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128297752] [2022-02-15 02:33:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:23,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:23,388 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:33:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:23,572 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 02:33:23,572 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:23,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128297752] [2022-02-15 02:33:23,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128297752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:23,572 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:23,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:33:23,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522546170] [2022-02-15 02:33:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:23,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:33:23,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:33:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:33:23,573 INFO L87 Difference]: Start difference. First operand 892 states and 1103 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 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 02:33:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:25,181 INFO L93 Difference]: Finished difference Result 1149 states and 1395 transitions. [2022-02-15 02:33:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:33:25,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 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 73 [2022-02-15 02:33:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:25,186 INFO L225 Difference]: With dead ends: 1149 [2022-02-15 02:33:25,186 INFO L226 Difference]: Without dead ends: 1044 [2022-02-15 02:33:25,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:33:25,186 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 2826 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:25,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2830 Valid, 1160 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:33:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-02-15 02:33:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 985. [2022-02-15 02:33:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 776 states have (on average 1.2448453608247423) internal successors, (966), 790 states have internal predecessors, (966), 109 states have call successors, (109), 78 states have call predecessors, (109), 99 states have return successors, (140), 121 states have call predecessors, (140), 104 states have call successors, (140) [2022-02-15 02:33:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1215 transitions. [2022-02-15 02:33:25,472 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1215 transitions. Word has length 73 [2022-02-15 02:33:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:25,472 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1215 transitions. [2022-02-15 02:33:25,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (10), 10 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 02:33:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1215 transitions. [2022-02-15 02:33:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 02:33:25,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:25,474 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] [2022-02-15 02:33:25,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 02:33:25,474 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1171935895, now seen corresponding path program 1 times [2022-02-15 02:33:25,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:25,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14430358] [2022-02-15 02:33:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:25,476 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 02:33:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:25,724 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 02:33:25,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:25,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14430358] [2022-02-15 02:33:25,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14430358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:25,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:25,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:33:25,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938958285] [2022-02-15 02:33:25,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:25,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:33:25,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:33:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:33:25,725 INFO L87 Difference]: Start difference. First operand 985 states and 1215 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:33:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:27,567 INFO L93 Difference]: Finished difference Result 1017 states and 1250 transitions. [2022-02-15 02:33:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:33:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-02-15 02:33:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:27,569 INFO L225 Difference]: With dead ends: 1017 [2022-02-15 02:33:27,569 INFO L226 Difference]: Without dead ends: 981 [2022-02-15 02:33:27,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:33:27,570 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 565 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 3699 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:27,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 2184 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3699 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:33:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-15 02:33:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-02-15 02:33:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 772 states have (on average 1.2435233160621761) internal successors, (960), 786 states have internal predecessors, (960), 109 states have call successors, (109), 78 states have call predecessors, (109), 99 states have return successors, (140), 121 states have call predecessors, (140), 104 states have call successors, (140) [2022-02-15 02:33:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1209 transitions. [2022-02-15 02:33:27,848 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1209 transitions. Word has length 77 [2022-02-15 02:33:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:27,848 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1209 transitions. [2022-02-15 02:33:27,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 10 states have internal predecessors, (57), 4 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 02:33:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1209 transitions. [2022-02-15 02:33:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:33:27,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:27,850 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] [2022-02-15 02:33:27,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 02:33:27,850 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -31950521, now seen corresponding path program 1 times [2022-02-15 02:33:27,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:27,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286380887] [2022-02-15 02:33:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:27,856 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:27,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:27,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:27,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:28,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:28,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-15 02:33:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:28,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:28,040 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 02:33:28,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:28,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286380887] [2022-02-15 02:33:28,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [286380887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:28,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:28,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:33:28,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766808256] [2022-02-15 02:33:28,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:28,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:33:28,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:33:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:33:28,042 INFO L87 Difference]: Start difference. First operand 981 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:33:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:29,004 INFO L93 Difference]: Finished difference Result 1034 states and 1265 transitions. [2022-02-15 02:33:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:29,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2022-02-15 02:33:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:29,007 INFO L225 Difference]: With dead ends: 1034 [2022-02-15 02:33:29,007 INFO L226 Difference]: Without dead ends: 947 [2022-02-15 02:33:29,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:33:29,007 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 520 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:29,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1099 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:33:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-02-15 02:33:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 947. [2022-02-15 02:33:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 744 states have (on average 1.239247311827957) internal successors, (922), 758 states have internal predecessors, (922), 103 states have call successors, (103), 78 states have call predecessors, (103), 99 states have return successors, (132), 115 states have call predecessors, (132), 98 states have call successors, (132) [2022-02-15 02:33:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1157 transitions. [2022-02-15 02:33:29,265 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1157 transitions. Word has length 78 [2022-02-15 02:33:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:29,265 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1157 transitions. [2022-02-15 02:33:29,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 10 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:33:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1157 transitions. [2022-02-15 02:33:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 02:33:29,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:29,266 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] [2022-02-15 02:33:29,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 02:33:29,267 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:29,267 INFO L85 PathProgramCache]: Analyzing trace with hash -460582850, now seen corresponding path program 1 times [2022-02-15 02:33:29,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:29,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234516299] [2022-02-15 02:33:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:29,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:29,268 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:33:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:33:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:29,440 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 02:33:29,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:29,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234516299] [2022-02-15 02:33:29,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234516299] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:29,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:29,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:33:29,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550089706] [2022-02-15 02:33:29,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:29,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:33:29,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:33:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:33:29,444 INFO L87 Difference]: Start difference. First operand 947 states and 1157 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 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 02:33:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:30,564 INFO L93 Difference]: Finished difference Result 976 states and 1185 transitions. [2022-02-15 02:33:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 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 75 [2022-02-15 02:33:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:30,566 INFO L225 Difference]: With dead ends: 976 [2022-02-15 02:33:30,567 INFO L226 Difference]: Without dead ends: 899 [2022-02-15 02:33:30,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:33:30,574 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 203 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:30,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1048 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:33:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-02-15 02:33:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-02-15 02:33:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 710 states have (on average 1.2422535211267605) internal successors, (882), 724 states have internal predecessors, (882), 93 states have call successors, (93), 74 states have call predecessors, (93), 95 states have return successors, (120), 105 states have call predecessors, (120), 88 states have call successors, (120) [2022-02-15 02:33:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1095 transitions. [2022-02-15 02:33:30,799 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1095 transitions. Word has length 75 [2022-02-15 02:33:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:30,800 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1095 transitions. [2022-02-15 02:33:30,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (11), 10 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 02:33:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1095 transitions. [2022-02-15 02:33:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:33:30,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:30,801 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 02:33:30,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 02:33:30,801 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1062745439, now seen corresponding path program 1 times [2022-02-15 02:33:30,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:30,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605612888] [2022-02-15 02:33:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:30,803 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 02:33:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 02:33:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:30,948 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 02:33:30,948 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:30,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605612888] [2022-02-15 02:33:30,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [605612888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:30,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:30,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:33:30,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22979064] [2022-02-15 02:33:30,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:30,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:33:30,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:33:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:33:30,949 INFO L87 Difference]: Start difference. First operand 899 states and 1095 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:33:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:31,793 INFO L93 Difference]: Finished difference Result 944 states and 1143 transitions. [2022-02-15 02:33:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-02-15 02:33:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:31,796 INFO L225 Difference]: With dead ends: 944 [2022-02-15 02:33:31,796 INFO L226 Difference]: Without dead ends: 883 [2022-02-15 02:33:31,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:33:31,796 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 307 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:31,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 857 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:33:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-02-15 02:33:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2022-02-15 02:33:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 696 states have (on average 1.2413793103448276) internal successors, (864), 710 states have internal predecessors, (864), 91 states have call successors, (91), 74 states have call predecessors, (91), 95 states have return successors, (116), 103 states have call predecessors, (116), 86 states have call successors, (116) [2022-02-15 02:33:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1071 transitions. [2022-02-15 02:33:32,012 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1071 transitions. Word has length 73 [2022-02-15 02:33:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:32,012 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1071 transitions. [2022-02-15 02:33:32,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:33:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1071 transitions. [2022-02-15 02:33:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 02:33:32,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:32,037 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] [2022-02-15 02:33:32,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 02:33:32,037 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash 225974744, now seen corresponding path program 1 times [2022-02-15 02:33:32,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:32,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534855130] [2022-02-15 02:33:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:32,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:32,039 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 02:33:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-15 02:33:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:32,291 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 02:33:32,291 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:32,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534855130] [2022-02-15 02:33:32,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [534855130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:32,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:32,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:33:32,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114812774] [2022-02-15 02:33:32,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:32,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:33:32,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:32,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:33:32,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:33:32,292 INFO L87 Difference]: Start difference. First operand 883 states and 1071 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:33:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:33,111 INFO L93 Difference]: Finished difference Result 1161 states and 1426 transitions. [2022-02-15 02:33:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:33:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 77 [2022-02-15 02:33:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:33,113 INFO L225 Difference]: With dead ends: 1161 [2022-02-15 02:33:33,113 INFO L226 Difference]: Without dead ends: 869 [2022-02-15 02:33:33,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:33:33,114 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 622 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:33,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 959 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:33:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-02-15 02:33:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2022-02-15 02:33:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 682 states have (on average 1.2346041055718475) internal successors, (842), 696 states have internal predecessors, (842), 91 states have call successors, (91), 74 states have call predecessors, (91), 95 states have return successors, (116), 103 states have call predecessors, (116), 86 states have call successors, (116) [2022-02-15 02:33:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1049 transitions. [2022-02-15 02:33:33,328 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1049 transitions. Word has length 77 [2022-02-15 02:33:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:33,328 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1049 transitions. [2022-02-15 02:33:33,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:33:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1049 transitions. [2022-02-15 02:33:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 02:33:33,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:33,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:33:33,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 02:33:33,329 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1317209987, now seen corresponding path program 1 times [2022-02-15 02:33:33,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:33,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037162265] [2022-02-15 02:33:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:33,331 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:33:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-15 02:33:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 02:33:33,487 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:33,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037162265] [2022-02-15 02:33:33,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037162265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:33,487 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:33,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:33:33,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715043399] [2022-02-15 02:33:33,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:33,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:33:33,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:33:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:33:33,488 INFO L87 Difference]: Start difference. First operand 869 states and 1049 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:34,230 INFO L93 Difference]: Finished difference Result 914 states and 1097 transitions. [2022-02-15 02:33:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:33:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-02-15 02:33:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:34,238 INFO L225 Difference]: With dead ends: 914 [2022-02-15 02:33:34,239 INFO L226 Difference]: Without dead ends: 849 [2022-02-15 02:33:34,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:33:34,257 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 284 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:34,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 858 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:33:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-15 02:33:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2022-02-15 02:33:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 666 states have (on average 1.2342342342342343) internal successors, (822), 680 states have internal predecessors, (822), 87 states have call successors, (87), 74 states have call predecessors, (87), 95 states have return successors, (112), 99 states have call predecessors, (112), 82 states have call successors, (112) [2022-02-15 02:33:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1021 transitions. [2022-02-15 02:33:34,488 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1021 transitions. Word has length 75 [2022-02-15 02:33:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:34,515 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1021 transitions. [2022-02-15 02:33:34,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1021 transitions. [2022-02-15 02:33:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 02:33:34,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:34,517 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:33:34,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 02:33:34,517 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash -611792915, now seen corresponding path program 1 times [2022-02-15 02:33:34,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:34,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346021347] [2022-02-15 02:33:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:34,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:34,520 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:33:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:33:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-15 02:33:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 02:33:34,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:34,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346021347] [2022-02-15 02:33:34,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346021347] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:34,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:34,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:33:34,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366331574] [2022-02-15 02:33:34,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:34,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:33:34,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:33:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:33:34,696 INFO L87 Difference]: Start difference. First operand 849 states and 1021 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:35,429 INFO L93 Difference]: Finished difference Result 883 states and 1053 transitions. [2022-02-15 02:33:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:33:35,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-02-15 02:33:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:35,432 INFO L225 Difference]: With dead ends: 883 [2022-02-15 02:33:35,432 INFO L226 Difference]: Without dead ends: 788 [2022-02-15 02:33:35,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:33:35,433 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 257 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:35,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 787 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:33:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-15 02:33:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-02-15 02:33:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 620 states have (on average 1.2419354838709677) internal successors, (770), 631 states have internal predecessors, (770), 81 states have call successors, (81), 71 states have call predecessors, (81), 86 states have return successors, (100), 90 states have call predecessors, (100), 76 states have call successors, (100) [2022-02-15 02:33:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 951 transitions. [2022-02-15 02:33:35,605 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 951 transitions. Word has length 77 [2022-02-15 02:33:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:35,606 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 951 transitions. [2022-02-15 02:33:35,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:33:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 951 transitions. [2022-02-15 02:33:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 02:33:35,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:35,607 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] [2022-02-15 02:33:35,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 02:33:35,607 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:35,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1451191297, now seen corresponding path program 1 times [2022-02-15 02:33:35,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:35,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945251336] [2022-02-15 02:33:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:35,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:35,609 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 02:33:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 02:33:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:35,789 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 02:33:35,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:35,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945251336] [2022-02-15 02:33:35,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945251336] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:35,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:35,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:33:35,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989825040] [2022-02-15 02:33:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:35,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:33:35,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:33:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:33:35,791 INFO L87 Difference]: Start difference. First operand 788 states and 951 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 02:33:36,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:36,607 INFO L93 Difference]: Finished difference Result 1066 states and 1306 transitions. [2022-02-15 02:33:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:33:36,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) Word has length 81 [2022-02-15 02:33:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:36,610 INFO L225 Difference]: With dead ends: 1066 [2022-02-15 02:33:36,610 INFO L226 Difference]: Without dead ends: 788 [2022-02-15 02:33:36,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:33:36,617 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 752 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:36,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 761 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:33:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-15 02:33:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-02-15 02:33:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 620 states have (on average 1.238709677419355) internal successors, (768), 631 states have internal predecessors, (768), 81 states have call successors, (81), 71 states have call predecessors, (81), 86 states have return successors, (100), 90 states have call predecessors, (100), 76 states have call successors, (100) [2022-02-15 02:33:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 949 transitions. [2022-02-15 02:33:36,791 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 949 transitions. Word has length 81 [2022-02-15 02:33:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:36,792 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 949 transitions. [2022-02-15 02:33:36,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (14), 11 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 02:33:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 949 transitions. [2022-02-15 02:33:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:33:36,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:36,793 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] [2022-02-15 02:33:36,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 02:33:36,793 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:36,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1545448737, now seen corresponding path program 1 times [2022-02-15 02:33:36,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:36,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998580292] [2022-02-15 02:33:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:36,795 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:36,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:36,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:36,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:36,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:36,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 02:33:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:37,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:37,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:37,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:37,054 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 02:33:37,054 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:37,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998580292] [2022-02-15 02:33:37,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [998580292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:37,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:37,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:33:37,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909069306] [2022-02-15 02:33:37,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:37,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:33:37,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:33:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:33:37,055 INFO L87 Difference]: Start difference. First operand 788 states and 949 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-15 02:33:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:38,744 INFO L93 Difference]: Finished difference Result 833 states and 994 transitions. [2022-02-15 02:33:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:33:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2022-02-15 02:33:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:38,745 INFO L225 Difference]: With dead ends: 833 [2022-02-15 02:33:38,745 INFO L226 Difference]: Without dead ends: 700 [2022-02-15 02:33:38,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:33:38,746 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 886 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:38,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1546 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:33:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-02-15 02:33:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 359. [2022-02-15 02:33:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 282 states have (on average 1.2375886524822695) internal successors, (349), 286 states have internal predecessors, (349), 39 states have call successors, (39), 35 states have call predecessors, (39), 37 states have return successors, (43), 39 states have call predecessors, (43), 35 states have call successors, (43) [2022-02-15 02:33:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 431 transitions. [2022-02-15 02:33:38,844 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 431 transitions. Word has length 78 [2022-02-15 02:33:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:38,844 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 431 transitions. [2022-02-15 02:33:38,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (11), 10 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-15 02:33:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 431 transitions. [2022-02-15 02:33:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:33:38,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:38,845 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] [2022-02-15 02:33:38,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 02:33:38,845 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash -550550697, now seen corresponding path program 1 times [2022-02-15 02:33:38,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:38,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538688024] [2022-02-15 02:33:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:38,847 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:38,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:38,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:38,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:33:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:38,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:33:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:33:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:33:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,080 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 02:33:39,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:39,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538688024] [2022-02-15 02:33:39,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [538688024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:39,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:39,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:33:39,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508815473] [2022-02-15 02:33:39,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:39,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:33:39,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:33:39,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:33:39,081 INFO L87 Difference]: Start difference. First operand 359 states and 431 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:33:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:39,763 INFO L93 Difference]: Finished difference Result 361 states and 432 transitions. [2022-02-15 02:33:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:33:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) Word has length 79 [2022-02-15 02:33:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:39,764 INFO L225 Difference]: With dead ends: 361 [2022-02-15 02:33:39,764 INFO L226 Difference]: Without dead ends: 282 [2022-02-15 02:33:39,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:33:39,764 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 193 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:39,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1510 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:33:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-15 02:33:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-02-15 02:33:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 219 states have (on average 1.2557077625570776) internal successors, (275), 221 states have internal predecessors, (275), 31 states have call successors, (31), 29 states have call predecessors, (31), 31 states have return successors, (36), 32 states have call predecessors, (36), 28 states have call successors, (36) [2022-02-15 02:33:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 342 transitions. [2022-02-15 02:33:39,837 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 342 transitions. Word has length 79 [2022-02-15 02:33:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:39,837 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 342 transitions. [2022-02-15 02:33:39,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (10), 9 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:33:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 342 transitions. [2022-02-15 02:33:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 02:33:39,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:39,838 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 02:33:39,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 02:33:39,838 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:39,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:39,838 INFO L85 PathProgramCache]: Analyzing trace with hash -312566598, now seen corresponding path program 1 times [2022-02-15 02:33:39,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:39,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885208753] [2022-02-15 02:33:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:39,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:39,840 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 02:33:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:33:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:39,975 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 02:33:39,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:39,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885208753] [2022-02-15 02:33:39,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [885208753] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:39,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:39,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:33:39,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425711797] [2022-02-15 02:33:39,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:39,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:33:39,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:33:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:33:39,976 INFO L87 Difference]: Start difference. First operand 282 states and 342 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 02:33:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:40,352 INFO L93 Difference]: Finished difference Result 365 states and 428 transitions. [2022-02-15 02:33:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:33:40,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 83 [2022-02-15 02:33:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:40,353 INFO L225 Difference]: With dead ends: 365 [2022-02-15 02:33:40,353 INFO L226 Difference]: Without dead ends: 279 [2022-02-15 02:33:40,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:33:40,353 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 216 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:40,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 674 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:33:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-15 02:33:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 235. [2022-02-15 02:33:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 180 states have (on average 1.1722222222222223) internal successors, (211), 183 states have internal predecessors, (211), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-02-15 02:33:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 267 transitions. [2022-02-15 02:33:40,413 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 267 transitions. Word has length 83 [2022-02-15 02:33:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:40,414 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 267 transitions. [2022-02-15 02:33:40,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 02:33:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 267 transitions. [2022-02-15 02:33:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-15 02:33:40,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:40,414 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 02:33:40,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 02:33:40,414 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1508205253, now seen corresponding path program 1 times [2022-02-15 02:33:40,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:40,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286797457] [2022-02-15 02:33:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:40,416 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:33:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:33:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 02:33:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:40,693 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 02:33:40,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:40,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286797457] [2022-02-15 02:33:40,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1286797457] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:40,694 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:40,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:33:40,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150125507] [2022-02-15 02:33:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:40,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:33:40,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:33:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:33:40,694 INFO L87 Difference]: Start difference. First operand 235 states and 267 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-15 02:33:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:41,378 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2022-02-15 02:33:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:33:41,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 99 [2022-02-15 02:33:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:41,379 INFO L225 Difference]: With dead ends: 287 [2022-02-15 02:33:41,379 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 02:33:41,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:33:41,380 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 386 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:41,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 968 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:33:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 02:33:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2022-02-15 02:33:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 182 states have internal predecessors, (207), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-02-15 02:33:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2022-02-15 02:33:41,440 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 99 [2022-02-15 02:33:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:41,440 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2022-02-15 02:33:41,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 11 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-15 02:33:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2022-02-15 02:33:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 02:33:41,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:41,441 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] [2022-02-15 02:33:41,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 02:33:41,441 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:41,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2089325257, now seen corresponding path program 1 times [2022-02-15 02:33:41,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:41,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168801175] [2022-02-15 02:33:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:41,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:41,443 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:33:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:33:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 02:33:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:33:41,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:41,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168801175] [2022-02-15 02:33:41,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168801175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:41,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:41,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:33:41,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018026181] [2022-02-15 02:33:41,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:41,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:33:41,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:41,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:33:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:33:41,693 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-02-15 02:33:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:42,867 INFO L93 Difference]: Finished difference Result 508 states and 570 transitions. [2022-02-15 02:33:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:33:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 101 [2022-02-15 02:33:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:42,868 INFO L225 Difference]: With dead ends: 508 [2022-02-15 02:33:42,869 INFO L226 Difference]: Without dead ends: 399 [2022-02-15 02:33:42,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:33:42,869 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 633 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:42,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 952 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:33:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-15 02:33:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 349. [2022-02-15 02:33:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 269 states have (on average 1.1486988847583643) internal successors, (309), 274 states have internal predecessors, (309), 40 states have call successors, (40), 38 states have call predecessors, (40), 39 states have return successors, (41), 37 states have call predecessors, (41), 38 states have call successors, (41) [2022-02-15 02:33:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 390 transitions. [2022-02-15 02:33:42,964 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 390 transitions. Word has length 101 [2022-02-15 02:33:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:42,964 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 390 transitions. [2022-02-15 02:33:42,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 9 states have internal predecessors, (75), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-02-15 02:33:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 390 transitions. [2022-02-15 02:33:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 02:33:42,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:42,965 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] [2022-02-15 02:33:42,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 02:33:42,965 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:42,966 INFO L85 PathProgramCache]: Analyzing trace with hash -212262027, now seen corresponding path program 1 times [2022-02-15 02:33:42,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:42,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502234980] [2022-02-15 02:33:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:42,967 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:33:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:33:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:33:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 02:33:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,169 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 02:33:43,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:43,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502234980] [2022-02-15 02:33:43,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [502234980] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:43,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:43,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:33:43,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633169794] [2022-02-15 02:33:43,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:43,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:33:43,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:33:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:33:43,170 INFO L87 Difference]: Start difference. First operand 349 states and 390 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 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 02:33:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:43,565 INFO L93 Difference]: Finished difference Result 367 states and 409 transitions. [2022-02-15 02:33:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:33:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 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 101 [2022-02-15 02:33:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:43,566 INFO L225 Difference]: With dead ends: 367 [2022-02-15 02:33:43,566 INFO L226 Difference]: Without dead ends: 261 [2022-02-15 02:33:43,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:33:43,566 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 59 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:43,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1040 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:33:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-15 02:33:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 146. [2022-02-15 02:33:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 112 states have (on average 1.125) internal successors, (126), 114 states have internal predecessors, (126), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-02-15 02:33:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2022-02-15 02:33:43,611 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 101 [2022-02-15 02:33:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:43,611 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2022-02-15 02:33:43,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (14), 11 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 02:33:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2022-02-15 02:33:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 02:33:43,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:43,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:33:43,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 02:33:43,612 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash -972922875, now seen corresponding path program 1 times [2022-02-15 02:33:43,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:43,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699511752] [2022-02-15 02:33:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:43,614 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:33:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:33:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:33:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:33:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-15 02:33:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:43,742 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 02:33:43,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:43,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699511752] [2022-02-15 02:33:43,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [699511752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:43,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:43,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:33:43,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311980639] [2022-02-15 02:33:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:43,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:33:43,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:33:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:33:43,743 INFO L87 Difference]: Start difference. First operand 146 states and 159 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-15 02:33:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:43,960 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-02-15 02:33:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:33:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2022-02-15 02:33:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:43,961 INFO L225 Difference]: With dead ends: 192 [2022-02-15 02:33:43,961 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 02:33:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:33:43,961 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 147 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:43,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 422 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:33:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 02:33:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-02-15 02:33:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 119 states have internal predecessors, (131), 18 states have call successors, (18), 17 states have call predecessors, (18), 16 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-02-15 02:33:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-02-15 02:33:44,028 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 116 [2022-02-15 02:33:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:44,028 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-02-15 02:33:44,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (15), 11 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-15 02:33:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-02-15 02:33:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 02:33:44,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:44,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:33:44,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 02:33:44,029 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1873274440, now seen corresponding path program 1 times [2022-02-15 02:33:44,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:44,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653036843] [2022-02-15 02:33:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:44,031 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:33:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:33:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:33:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:33:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-15 02:33:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:44,241 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 02:33:44,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:44,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653036843] [2022-02-15 02:33:44,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [653036843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:44,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:44,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:33:44,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881145586] [2022-02-15 02:33:44,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:44,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:33:44,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:33:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:33:44,243 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-15 02:33:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:44,919 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2022-02-15 02:33:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:33:44,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2022-02-15 02:33:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:44,920 INFO L225 Difference]: With dead ends: 292 [2022-02-15 02:33:44,920 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 02:33:44,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:33:44,921 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 254 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:44,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 377 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:33:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 02:33:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-02-15 02:33:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 119 states have internal predecessors, (130), 18 states have call successors, (18), 17 states have call predecessors, (18), 16 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-02-15 02:33:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-02-15 02:33:44,968 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 116 [2022-02-15 02:33:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:44,968 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-02-15 02:33:44,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-15 02:33:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-02-15 02:33:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 02:33:44,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:33:44,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:33:44,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 02:33:44,969 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:33:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:33:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1991715914, now seen corresponding path program 1 times [2022-02-15 02:33:44,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:33:44,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451501008] [2022-02-15 02:33:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:33:44,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:33:44,971 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:33:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:33:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:33:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:33:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:33:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 02:33:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:33:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:33:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 02:33:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:33:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:33:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-15 02:33:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:33:45,258 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 02:33:45,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:33:45,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451501008] [2022-02-15 02:33:45,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [451501008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:33:45,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:33:45,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:33:45,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840383245] [2022-02-15 02:33:45,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:33:45,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:33:45,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:33:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:33:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:33:45,260 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-15 02:33:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:33:45,673 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-02-15 02:33:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:33:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2022-02-15 02:33:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:33:45,674 INFO L225 Difference]: With dead ends: 152 [2022-02-15 02:33:45,674 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 02:33:45,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:33:45,676 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 271 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:33:45,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 332 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:33:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 02:33:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 02:33:45,676 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 02:33:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 02:33:45,676 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-02-15 02:33:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:33:45,676 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 02:33:45,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 9 states have internal predecessors, (81), 5 states have call successors, (15), 11 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-15 02:33:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 02:33:45,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 02:33:45,693 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 02:33:45,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 02:33:45,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.